Parshina S.S., Tokayeva L.K., Dolgova E.M., Afanas'yeva T.N., Samsonov S.N., Petrova V.D., Vodolagina E.S., Kaplanova T.I., Potapova M.V. «Erythrocytes functional features in the 11-year solar cycle» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 240-241 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114691 There had been studied features of rheological blood failures in patients with unstable angina (UA) in periods of the high (HSA) and low solar activity (LSA) in the 23^rd 11-year solar cycle. This category of patients is characterized by prethrombotic blood state, although they don’t have coronary thrombosis. The research aimed to study compensatory mechanisms which block thrombosis development at the solar activity increase. There had been established that the period of the solar activity increasing in the 11-year solar cycle is characterized by an increase of a blood viscosity, comparing with the period of a low solar activity. Though, erythrocytes functional features in this case are compensatory mechanisms – erythrocyte aggregation paradoxically reduced and their deformability increases. It is probably connected with the revealed fibrinogen decrease in the period of the high solar activity. We can see that the change of a solar activity is accompanied not only by the progressing of pathologic processes, but also by an activation of adaptive changes in erythrocyte membrane so0 as to prevent thrombosis. Though, the required compensatory mechanisms were found invalid, which were shown in the decrease of an oxygen delivery to tissues, and the effectiveness decrease of the medical treatment in the period of a HSA.

Kashuba S., Andruk V., Kashuba V. «On the digitisation of Odessa collection of astronomical negatives. Examination of the Epson perfection V 700 photo scanner» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 174-177 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114277 Ключевые слова: astronegative, scanning, processing of digitized plates

Kashuba S., Andruk V., Kashuba V. «On the digitisation of Odessa collection of astronomical negatives. Examination of the Epson perfection V 700 photo scanner» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 174-177 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114277 Ключевые слова: astronegative, scanning, processing of digitized plates

Koshkin N.I., Savanevich V., Pohorelov A., Shakun L., Zhukov V., Korobeynikova E., Strakhova S., Moskalenko S., Kashuba V., Krasnoshchokov A. «Ukrainian database and atlas of light curves of artificial space objects» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 226-229 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.117655 This paper describes the Ukrainian database of long-term photometric observations of resident space objects (RSO). For the purpose of using this database for the outer space monitoring and space situational awareness (SSA) the open internet resource has been developed. The paper shows examples of using the Atlas of light curves of RSO's for analyzing the state of rotation around the center of mass of several active and non-functioning satellites in orbit.

Oknyansky V.L., Gaskell C.M., Huseynov N.A., Mikailov Kh.M., Lipunov V.M., Malanchev N.I., Tsygankov S.S., Gorbovskov E.S., Tatarnikov A.M., Metlov V.G., Shatsky K.L., Brotherton M.B., Kasper D., Du P., Chen X., Burlak M.A., Buckley D.A.H., Rebolo R., Serra-Ricart M., Podesta R., Levato H. «Ulti-wavelength monitoring of the changing-look AGN NGC 2617 during state changes» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 117-120 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114366 Optical and near-infrared photometry, optical spectroscopy, and soft X-ray and UV monitoring of the changing-look active galactic nucleus NGC 2617 show that it continues to have the appearance of a type-1 Seyfert galaxy. An optical light curve for 2010–2017 indicates that the change of type probably occurred between 2010 October and 2012 February and was not related to the brightening in 2013. In 2016 and 2017 NGC 2617 brightened again to a level of activity close to that in 2013 April. However, in 2017 from the end of the March to end of July 2017 it was in very low level and starting to change back to a Seyfert 1.8. We find variations in all passbands and in both the intensities and profiles of the broad Balmer lines. A new displaced emission peak has appeared in H_β. X-ray variations are well correlated with UV–optical variability and possibly lead by ∼2–3^d. The K band lags the J band by about 21.5±2.5^d and lags the combined B+J bands by ∼25^d. J lags B by about 3 d. This could be because J-band variability arises predominantly from the outer part of the accretion disc, while K-band variability is dominated by thermal re-emission by dust. We propose that spectral-type changes are a result of increasing central luminosity causing sublimation of the innermost dust in the hollow bi-conical outflow. We briefly discuss various other possible reasons that might explain the dramatic changes in NGC 2617.

Andruk V., Yuldoshev Q., Eglitis I., Pakuliak L., Mullo-Abdolov A., Vaviliva I., Protsyuk Yu., Relke H., Golovnia V., Shatokhina S., Yizhakevych O., Ehgamberdiev Sh., Muminov M., Kokhirova G., Kazantseva L. «On the concept of the enhanced FON catalog compilation» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 159-162 (2017)

Shatokhina S.V., Kazantseva L.V., Yizhakevych O.M., Eglitis I., Andruk V.M. «Asteroids search results in large photographic Sky Surveys» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 198-200 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114510 Photographic observations of XX century contained numerous and varied information about all objects and events of the Universe fixed on plates. The original and interesting observations of small bodies of the Solar system in previous years can be selected and used for various scientific tasks. Existing databases and online services can help make such selection easily and quickly. The observations of chronologically earlier positions, photometric evaluation of brightness for long periods of time allow refining the orbits of asteroids and identifying various non-stationaries. Photographic observations of Northern Sky Survey project and observations of clusters in UBVR bands were used for global search for small bodies of Solar system. Total we founded 2486 positions of asteroids and 13 positions of comets. All positions were compared with ephemeris. It was found that 80 positions of asteroids have a moment of observation preceding their discovery, and 19 of them are chronologically the earliest observations of these asteroids in the world.

Udovichenko S.N., Keir L.E. «Photometry and Blazhko effect in RR Lyr-type star AE Leo» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 140-142 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114381 The photometric observations for the RR Lyr-type star AE Leo in the Astronomical station near Odessa using the 48-cm reflector AZT-3 and the CCD photometer equipped with the V filter have been carried out. The light curves shows variable amplitude of light maxima and the moderate Blazhko effect. The analysis of the O–C light maxima for our observations and the ASAS, NSVS data indicates the secular period changes.

Savanevych V.E., Briukhovetskyi O.B., Khlamov S.V., Pohorelov A.V., Vlasenko V.P., Dubovsky P.A., Kudzej I., Parimucha Š. «COLITECVS – new tool for automated reduction of photometric observations» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 194-197 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114495 The capabilities of telescopes allow us to make the plotting of light curves a routine task. This one shifts the main attention of astronomer from the plotting to research. To achieve this goal, we developed a new tool for automated reduction of photometric observations, which includes the computational method for the brightness assessment of the investigated and comparison stars; brightness equalization of astronomical images using inverse median filter; light curve plotting and its processing using different tools.

Khramtsov V., Akhmetov V. «Supervised automatic identification of extragalactic sources in the WISExSuperCOSMOS catalogue» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 178-181 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114465 We present new catalogue of ∼8,500,000 extragalactic objects as a result of automatic classification of WISE and SuperCOSMOS (SCOS) cross-identification product. The main goal is to create a set of candidates in extragalactic objects due to colour (photometric) features through machine learning techniques. Extragalactic sources were separated from stars in high-dimensional colour space using Support Vector Machine (SVM) classifier. Construction of catalogue of the extragalactic objects is based on the four important procedures: 1. Cross-identification of the WISExSCOS catalogues. 2. Training set creation (Gaia DR1 and 2MASX\XSC data). 3. Feature engineering and colour-space constructing for further learning and classification. 4. Fine-tuning of SVM and separation and classification processes. In result we got high-accuracy (∼98%) algorithm for extragalactic source identification in built colour space. Product of algorithm realization is presented as photometric catalogue of the extragalactic objects and can be used for further astronomical investigations.

Gorbanev Yu.M., Stogneeva I.A., Shestopalov V.A., Knyazkova E.F., Kimakovskaya I.I., Kimakovsky S.R., Golubaev A.V. «The effect of major meteor streams on the total ozone in the earth's atmosphere» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 209-218 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114643 The correlation between the total ozone and activity of major meteor streams, such as the Perseids, Geminids, Leonids and Orionids, has been found using the Total Ozone Mapping Spectrometer (TOMS) measurements of the global ozone distribution over the periods 1978–1993 and 1996–2001. The autocorrelation analysis of the total ozone time series for the period of about 20 years has confirmed the existence of regular changes in the ozone levels at the peaks of meteor shower activity. It has been established that TO decreases after the dates of peak activity of meteor streams (e.g. the Perseids) or during the whole periods of meteor shower activity (e.g. the Geminids, Orionids and Leonids). The analysis of the total ozone distribution (in the Southern and Northern Hemispheres), as well as the local distribution of ozone (over the selected surface area of several hundred square kilometres), was performed during the Leonid meteor shower in 1999. The atmospheric zones for which the ozone distribution pattern can be described as a result of interaction between the meteor shower material and the ozone layer were localised by applying the TOMS data. Such zones correspond to the regions where the highest Leonid activity has been observed. According to the radar observations (conducted in Kazan, Russian Federation), three activity maxima of the 1988 Geminid shower were reported: on the nights of 7, 12 and 14th December, 1988. The TO decrease was observed on the same dates. Thus, the analysis of the TO changes during the periods of intense meteor shower’s activity enables to preliminary assess the maximum overall decline in the total ozone concentration which makes about 5 DU over two weeks. From the results obtained it can be inferred that the ozone layer can be used as an indicator of the interaction between the meteoric material and the Earth’s atmosphere.

Gorbanev Yu.M., Stogneeva I.A., Shestopalov V.A., Knyazkova E.F., Kimakovskaya I.I., Kimakovsky S.R., Golubaev A.V. «The effect of major meteor streams on the total ozone in the earth's atmosphere» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 209-218 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114643 The correlation between the total ozone and activity of major meteor streams, such as the Perseids, Geminids, Leonids and Orionids, has been found using the Total Ozone Mapping Spectrometer (TOMS) measurements of the global ozone distribution over the periods 1978–1993 and 1996–2001. The autocorrelation analysis of the total ozone time series for the period of about 20 years has confirmed the existence of regular changes in the ozone levels at the peaks of meteor shower activity. It has been established that TO decreases after the dates of peak activity of meteor streams (e.g. the Perseids) or during the whole periods of meteor shower activity (e.g. the Geminids, Orionids and Leonids). The analysis of the total ozone distribution (in the Southern and Northern Hemispheres), as well as the local distribution of ozone (over the selected surface area of several hundred square kilometres), was performed during the Leonid meteor shower in 1999. The atmospheric zones for which the ozone distribution pattern can be described as a result of interaction between the meteor shower material and the ozone layer were localised by applying the TOMS data. Such zones correspond to the regions where the highest Leonid activity has been observed. According to the radar observations (conducted in Kazan, Russian Federation), three activity maxima of the 1988 Geminid shower were reported: on the nights of 7, 12 and 14th December, 1988. The TO decrease was observed on the same dates. Thus, the analysis of the TO changes during the periods of intense meteor shower’s activity enables to preliminary assess the maximum overall decline in the total ozone concentration which makes about 5 DU over two weeks. From the results obtained it can be inferred that the ozone layer can be used as an indicator of the interaction between the meteoric material and the Earth’s atmosphere.

Mishenina T., Klochkova V., Panchuk V., Basak N., Kovtyukh V., Korotin S., Velichko A. «Three giants – members of the open cluster M 67» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 108-112 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114355 We determined the atmospheric parameters and chemical composition of the three giants, which are members of the open cluster M 67. The high resolution spectra (R=60 000) were obtained with the echelle spectrograph NES mounted on the 6-metertelescope of the SAO RAS Obtained variations in Na and Zr abundances are within the determination errors. The Li abundance suggest a depletion of Li in the course ofstellar evolution. For studied giants, the iron abundances derived from the neutral and ionized iron lines have not shown any significant discrepancies. The [Ba/Fe] values are close to the solar ones.

Usenko I.A., Kniazev A.Yu., Kovtyukh V.V., Belik S.I., Berdnikov L.N. «Spectroscopical study of faint southern Cepheids with Southern African large telescope (SALT). first results» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 143-145 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.117156 First Cepheids observations using echelle-spectrograph HRS fed by Southern African Large Telescope (SALT) were realized during 2016. All spectra have been obtained in the medium resoltion mode (R≈31000–41000) with high S/N ratio near 50–220. All data were processed using package developed by authors based on the standard system of astronomical data reduction MIDAS. Using new echelle data we found the atmosphere parameters and chemical composition for 30 faint Cepheids of southern hemisphere, where for the most of theses stars these results we obtained for the first time. 28 stars are Cepheids after the first-dredge up stage, while ASAS 075842-25336.1 and ASAS 1131714-6605.0 having remarkable Li I 6707.8 A absorption line and anomalous CNO and Na content could be consider as first crossing of the Cepheids instability strip.

Gorbanev Yu.M., Stogneeva I.A., Shestopalov V.A., Knyazkova E.F., Kimakovskaya I.I., Kimakovsky S.R., Golubaev A.V. «The effect of major meteor streams on the total ozone in the earth's atmosphere» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 209-218 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114643 The correlation between the total ozone and activity of major meteor streams, such as the Perseids, Geminids, Leonids and Orionids, has been found using the Total Ozone Mapping Spectrometer (TOMS) measurements of the global ozone distribution over the periods 1978–1993 and 1996–2001. The autocorrelation analysis of the total ozone time series for the period of about 20 years has confirmed the existence of regular changes in the ozone levels at the peaks of meteor shower activity. It has been established that TO decreases after the dates of peak activity of meteor streams (e.g. the Perseids) or during the whole periods of meteor shower activity (e.g. the Geminids, Orionids and Leonids). The analysis of the total ozone distribution (in the Southern and Northern Hemispheres), as well as the local distribution of ozone (over the selected surface area of several hundred square kilometres), was performed during the Leonid meteor shower in 1999. The atmospheric zones for which the ozone distribution pattern can be described as a result of interaction between the meteor shower material and the ozone layer were localised by applying the TOMS data. Such zones correspond to the regions where the highest Leonid activity has been observed. According to the radar observations (conducted in Kazan, Russian Federation), three activity maxima of the 1988 Geminid shower were reported: on the nights of 7, 12 and 14th December, 1988. The TO decrease was observed on the same dates. Thus, the analysis of the TO changes during the periods of intense meteor shower’s activity enables to preliminary assess the maximum overall decline in the total ozone concentration which makes about 5 DU over two weeks. From the results obtained it can be inferred that the ozone layer can be used as an indicator of the interaction between the meteoric material and the Earth’s atmosphere.

Andruk V., Yuldoshev Q., Eglitis I., Pakuliak L., Mullo-Abdolov A., Vaviliva I., Protsyuk Yu., Relke H., Golovnia V., Shatokhina S., Yizhakevych O., Ehgamberdiev Sh., Muminov M., Kokhirova G., Kazantseva L. «On the concept of the enhanced FON catalog compilation» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 159-162 (2017)

Mullo-Abdolov A., Kokhirova G., Relke H., Yuldoshev Q., Protsyuk Yu., Andruk V. «Investigation of the Microtek ScanMaker 1000XL PLUS scanner of the Institute of astrophysics of the Academy of Sciences of the Republic of Tajikistan» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 186-189 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114407 This work was done to estimate the accuracy of the processing method of photographic plates and the detailed study of the Microtek ScanMaker 1000XL Plus scanner, which plans to be used for the digitizing of about 1600 photographic plates of the Astrophysics Institute of the Academy of Sciences of the Republic of Tajikistan (Dushanbe) recorded for the FON project. For the processing of these photographic plates will be used software created in the LINUX/MIDAS/ROMAFOT environment. Six sequential scans of a single plate (1150, the Pleiades cluster) with a spatial resolution of 1200 dpi were processed to evaluate the repeatability of the scanner's astrometric and photometric errors. The size of photographic plates is 8×8 degrees (30×30 cm or 13000×13000 pixels). The estimated errors of the scanner for the stars brighter than B<13.5^m are σ_xy=±0.054 pixels for the rectangular coordinates and σ_m=±0.020^m for the instrumental magnitudes. The estimated astrometric accuracy of the processing of stellar fields of photographic plates in the system of the Tycho-2 catalogue is σ_αδ=±0.13".

Golovashchenko V.A., Kolomiyets S.V. «Meteor observational data visualisation in the equatorial coordinate system using information technology» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 166-169 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.115454 As a result of dynamic evolution of IT industry and astronomical research in the XXI century, which have resulted in obtaining large and complex data sets known as Big Data (e.g. data from the European Space Agency missions, such as GAIA mission, etc.), as well as due to rapid development of computer technologies, astronomy and computer science have become closely linked to each other. In the XXI century, Information technology has become an essential part of understanding the world around. This paper presents a solution to the problem of meteor data representation in the second equatorial coordinate (RA-Dec) system using Information Technology. Such a visualisation solution is needed to analyse the results of experiments based on the radar observations conducted in 1972–1978 (stage 1 – the data obtained in 1972 comprise 10,247 meteor orbits), which have been accumulated and stored in the Meteor Database of the Kharkiv National University of Radio Electronics (KNURE). A sample set of data with their characteristicsand details about their delivery has been presented by (Kashcheyev–Tkachuk, 1980). An electronic calculator application was developed by employing the model of data visualisation in the form of celestial hemispheres using the object-oriented programming language C#.

Kolotsey A., Atroschenco M., Dubrouski S.A., Baluk I.I «Updated light elements of 10 RRab stars in the Antlia, Caelum and Sculptor constellations» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 85-88 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.117671 This paper presents the results of verification of the periods and other characteristics of 10 variable stars. The All Sky Automated Survey (ASAS) data have been used in this verification study. 10 RRab stars in the Antlia, Caelum and Sculptor constellations have been investigated. The study was performed using the software package developed by S.A. Dubrouski and V.P. Goranski.

Bolotin Yu.L., Zazunov L.G., Konchatnyi M.I., Lemets O.A. «The ABC of cosmography» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 13-15 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114129

Kondratyev V.N. «Short soft Γ-ray burst spectral evolution» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 89-90 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114279 Short Soft Gamma-Ray bursts are considered as neutron star crust magnetoemission. Statistics of temporal burst properties are shown to display universal features.

Kondratyev V.N., Nurtayeva U.M., Zhomartova A.Zh., Mishenina T.V. «Synthesis of magnetized nuclei at supernova explosion» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 91-92 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114335 Influence of magnetorotational instabilities in astrophysical plasma at supernova explosion on synthesis of chemical elements is investigated. At field strength less than 10 teratesla nuclear magnetic susceptibility exhibits linear regime with enhanced nuclear binding energy for open shell nuclei. Effects of ultra-strong nuclear magnetization are demonstrated to enhance the portion of titanium product. The relation to an excess of titanium isotopes revealed from the Integral mission data and galactic chemical evolution is discussed.

Koshkin N.I., Savanevich V., Pohorelov A., Shakun L., Zhukov V., Korobeynikova E., Strakhova S., Moskalenko S., Kashuba V., Krasnoshchokov A. «Ukrainian database and atlas of light curves of artificial space objects» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 226-229 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.117655 This paper describes the Ukrainian database of long-term photometric observations of resident space objects (RSO). For the purpose of using this database for the outer space monitoring and space situational awareness (SSA) the open internet resource has been developed. The paper shows examples of using the Atlas of light curves of RSO's for analyzing the state of rotation around the center of mass of several active and non-functioning satellites in orbit.

Shakun L., Koshkin N., Korobeynikova E., Strakhova S., Dragomiretsky V., Ryabov A., Melikyants S., Golubovskaya T., Terpan S. «Accuracy of satellite optical observations and precise orbit determination» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 242-245 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.117660 The monitoring of low-orbit space objects (LEO-objects) is performed in the Astronomical Observatory of Odessa I.I. Mechnikov National University (Ukraine) for many years. Decades-long arсhives of these observations are accessible within Ukrainian network of optical observers (UMOS). In this work, we give an example of orbit determination for the satellite with the 1500-km height of orbit based on angular observations in our observatory (Int. No. 086). For estimation of the measurement accuracy and accuracy of determination and propagation of satellite position, we analyze the observations of Ajisai satellite with the well-determined orbit. This allows making justified conclusions not only about random errors of separate measurements, but also to analyze the presence of systematic errors, including external ones to the measurement process. We have shown that the accuracy of one measurement has the standard deviation about 1 arcsec across the track and 1.4 arcsec along the track and systematical shifts in measurements of one track do not exceed 0.45 arcsec. Ajisai position in the interval of the orbit fitting is predicted with accuracy better than 30 m along the orbit and better than 10 m across the orbit for any its point.

Mishenina T., Klochkova V., Panchuk V., Basak N., Kovtyukh V., Korotin S., Velichko A. «Three giants – members of the open cluster M 67» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 108-112 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114355 We determined the atmospheric parameters and chemical composition of the three giants, which are members of the open cluster M 67. The high resolution spectra (R=60 000) were obtained with the echelle spectrograph NES mounted on the 6-metertelescope of the SAO RAS Obtained variations in Na and Zr abundances are within the determination errors. The Li abundance suggest a depletion of Li in the course ofstellar evolution. For studied giants, the iron abundances derived from the neutral and ionized iron lines have not shown any significant discrepancies. The [Ba/Fe] values are close to the solar ones.

Andrievsky S.M., Korotin S.A., Hill V., Zhukova A.V. «Zirconium abundances in the central part of the DsPH Fornax galaxy» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 54-56 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.117154 We derived LTE zirconium abundance in a sample of 81 giant stars in dwarf spheroidal Fornax galaxy. The LTE synthesis was used for this aim. We obtained the lower Zr abundance in Fornax galaxy comparing to the relevant value in the thick/thin disc of the Milky Way. We note that this result may be affected by the NLTE effects that decrease the real zirconium abundance.

Shakun L., Koshkin N., Korobeynikova E., Strakhova S., Dragomiretsky V., Ryabov A., Melikyants S., Golubovskaya T., Terpan S. «Accuracy of satellite optical observations and precise orbit determination» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 242-245 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.117660 The monitoring of low-orbit space objects (LEO-objects) is performed in the Astronomical Observatory of Odessa I.I. Mechnikov National University (Ukraine) for many years. Decades-long arсhives of these observations are accessible within Ukrainian network of optical observers (UMOS). In this work, we give an example of orbit determination for the satellite with the 1500-km height of orbit based on angular observations in our observatory (Int. No. 086). For estimation of the measurement accuracy and accuracy of determination and propagation of satellite position, we analyze the observations of Ajisai satellite with the well-determined orbit. This allows making justified conclusions not only about random errors of separate measurements, but also to analyze the presence of systematic errors, including external ones to the measurement process. We have shown that the accuracy of one measurement has the standard deviation about 1 arcsec across the track and 1.4 arcsec along the track and systematical shifts in measurements of one track do not exceed 0.45 arcsec. Ajisai position in the interval of the orbit fitting is predicted with accuracy better than 30 m along the orbit and better than 10 m across the orbit for any its point.

Koshkin N.I., Savanevich V., Pohorelov A., Shakun L., Zhukov V., Korobeynikova E., Strakhova S., Moskalenko S., Kashuba V., Krasnoshchokov A. «Ukrainian database and atlas of light curves of artificial space objects» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 226-229 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.117655 This paper describes the Ukrainian database of long-term photometric observations of resident space objects (RSO). For the purpose of using this database for the outer space monitoring and space situational awareness (SSA) the open internet resource has been developed. The paper shows examples of using the Atlas of light curves of RSO's for analyzing the state of rotation around the center of mass of several active and non-functioning satellites in orbit.

Kotvytskiy A.T., Bronza S.D., Shablenko V.Yu. «Correlation of the number of images of an n-point gravitational lens and the number of solutions of its system» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 35-37 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114229. In this paper, we study the correlation between the number of solutions of a system of lens equations and the number of source images that a gravitational lens has. We defined the concept of an image in a gravitational lens. To find the set of solutions of a system of lens equations, we applied methods of algebraic geometry.

Mishenina T., Klochkova V., Panchuk V., Basak N., Kovtyukh V., Korotin S., Velichko A. «Three giants – members of the open cluster M 67» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 108-112 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114355 We determined the atmospheric parameters and chemical composition of the three giants, which are members of the open cluster M 67. The high resolution spectra (R=60 000) were obtained with the echelle spectrograph NES mounted on the 6-metertelescope of the SAO RAS Obtained variations in Na and Zr abundances are within the determination errors. The Li abundance suggest a depletion of Li in the course ofstellar evolution. For studied giants, the iron abundances derived from the neutral and ionized iron lines have not shown any significant discrepancies. The [Ba/Fe] values are close to the solar ones.

Usenko I.A., Kniazev A.Yu., Kovtyukh V.V., Belik S.I., Berdnikov L.N. «Spectroscopical study of faint southern Cepheids with Southern African large telescope (SALT). first results» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 143-145 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.117156 First Cepheids observations using echelle-spectrograph HRS fed by Southern African Large Telescope (SALT) were realized during 2016. All spectra have been obtained in the medium resoltion mode (R≈31000–41000) with high S/N ratio near 50–220. All data were processed using package developed by authors based on the standard system of astronomical data reduction MIDAS. Using new echelle data we found the atmosphere parameters and chemical composition for 30 faint Cepheids of southern hemisphere, where for the most of theses stars these results we obtained for the first time. 28 stars are Cepheids after the first-dredge up stage, while ASAS 075842-25336.1 and ASAS 1131714-6605.0 having remarkable Li I 6707.8 A absorption line and anomalous CNO and Na content could be consider as first crossing of the Cepheids instability strip.

Usenko I.A., Kovtyukh V.V., Miroshnichenko A.S., Danford S. «Pulsational activity of the small-amplitude Cepheid Polaris (α UMi) in 2016–2017» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 146-148 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114382 We present the results of an analysis of 49 spectra of α UMi (Polaris) obtained during August–December 2016 and January–March 2017. Frequency analysis displays an unexpected decrease of the pulsational period up to 17.3min in comparison to the 2015 observational set. The radial velocity amplitude was reduced to 3.43 km s^–1 in 2016 and to 3.31km s^–1 in the beginning of 2017 in comparison with 4.16 km s^–1 in 2015. This result is also unexpected, because during the last decade a gradual amplitude growth has been observed. The average T_eff=6021 K determined from the 2016–2017 data is close to the values determined for the 2001–2015 set.

Yuldoshev Q.H., Muminov M.M., Ehgamberdiev Sh.A., Relke H., Protsyuk Yu.I., Kovylianska O.E., Protsyuk S.V., Andruk V.M. «Catalogue of coordinates and B-magnitudes in –20° – +2° zone based on the Ulugh Beg Astronomical institute part of the FON project» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 205-208 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114443 Catalogue of 13.4 million stars down to 17.5m was obtained in 2017 by using plates from the Kitab Observatory of Ulugh Beg Astronomical Institute (UBAI) of the Uzbek Academy of Sciences. Kitab's part of Photographic Sky Survey (Russian abbreviation is FON, in next contexts) project include more than 2600 photographic plates, exposed on the Double Astrograph of Zeiss (DAZ, D/F=40/300, 69"/mm) from 1981 to 1996. Digitizationof these plates was made by using Epson Expression 10000XL scanner with the 1200 dpi resolution. Catalogue includes objects from the 1963 plates in declination zone between –20° and +2° for middle epoch 1984.97. The equatorial coordinates of objects were determined in the Tycho-2 reference system and the B-magnitudes in the system of the photoelectric standards. Five participants from Uzbekistan, Germany and Ukraine have taken part in the processing of the digitized images. The average internal accuracy of the catalogue for one observation are 0.23" and 0.15^m for the equatorial coordinates and B-magnitudes respectively. For the stars brighter than 14^m the errors are 0.09" and 0.05^m respectively. The analysis of the catalogue and its comparison with the several astrometric catalogues was done.

Koshkin N.I., Savanevich V., Pohorelov A., Shakun L., Zhukov V., Korobeynikova E., Strakhova S., Moskalenko S., Kashuba V., Krasnoshchokov A. «Ukrainian database and atlas of light curves of artificial space objects» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 226-229 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.117655 This paper describes the Ukrainian database of long-term photometric observations of resident space objects (RSO). For the purpose of using this database for the outer space monitoring and space situational awareness (SSA) the open internet resource has been developed. The paper shows examples of using the Atlas of light curves of RSO's for analyzing the state of rotation around the center of mass of several active and non-functioning satellites in orbit.

Abdullah A.H., Kroupa P. «The Dichotomy of the Mass-Radius Relation and the Number of Globular Clusters» Письма в Астрономический журнал: Астрономия и космическая физика, 47, № 3, с. 205 (2021)

DOI: 10.31857/S0320010821030025

Kudashkina L.S., Andronov I.L. «Phase plane analysis of the photometrical variations of long-period variables» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 93-97 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114346 Using the phase plane diagrams, the phase light curves of a group of the Mira-type stars and semi-regular variables are analyzed. As generalized coordinates х and x-dot, we have used m – the brightness of the star and its phase derivative. We have used mean phase light curves using observations of various authors. The data typically span a large time interval (nearly a century). They were compiled from the databases of AAVSO, AFOEV, VSOLJ, ASAS and approximated using a trigonometric polynomial of statistically optimal degree. As the resulting approximation characterizes the auto oscillation process, which leads to a photometrical variability, the phase diagram corresponds to a limit cycle. For all stars studied, the limit cycles were computed. For a simple sine-like light curve, in e.g., L₂ Pup, the limit cycle is a simple ellipse. In a case of more complicated light curve, in which harmonics are statistically significant, the limit cycle has deviations from the ellipse. In an addition to a classical analysis, we use the error estimates of the smoothing function and its derivative to constrain an “error corridor” in the phase plane.

Savanevych V.E., Briukhovetskyi O.B., Khlamov S.V., Pohorelov A.V., Vlasenko V.P., Dubovsky P.A., Kudzej I., Parimucha Š. «COLITECVS – new tool for automated reduction of photometric observations» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 194-197 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114495 The capabilities of telescopes allow us to make the plotting of light curves a routine task. This one shifts the main attention of astronomer from the plotting to research. To achieve this goal, we developed a new tool for automated reduction of photometric observations, which includes the computational method for the brightness assessment of the investigated and comparison stars; brightness equalization of astronomical images using inverse median filter; light curve plotting and its processing using different tools.

Kulichenko M.O., Shulga O.V., Shulga O.V. «Double station observation of meteors with low baseline in Mykolaiv» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 230-231 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114685 Results of single and double station observations of meteors using TV CCD techniques which were conducted in 2013–2016 in Mykolaiv astronomical observatory (RI MAO) are shown in the article.

Kuratova A.K., Zakhozhay O.V., Kuratov K.S., Zakhozhay V.A., Miroshnichenko A.S. «Physical parameters of protoplanetary disk surrounding IRAS 22150+6109 young star» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 98-100 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114371

Kuratova A.K., Zakhozhay O.V., Kuratov K.S., Zakhozhay V.A., Miroshnichenko A.S. «Physical parameters of protoplanetary disk surrounding IRAS 22150+6109 young star» Публикации Одесской астрономической обсерватории (Odessa Astronomical Publications, Украина), 30, с. 98-100 (2017)

DOI: https://doi.org/10.18524/1810-4215.2017.30.114371