Conveners
Solar system & extrasolar planets
- Olena Shubina (Astronomical Institute of the Slovak Academy of Sciences, Tatransk ́a Lomnica, Slovak Republic; Main Astronomical Observatory of National Academy of Sciences of Ukraine, Kyiv, Ukraine)
We present the results of photometrical observations of hyperbolic comet C/2013 X1 (Pan-STARRS) in broadband Johnson-Cousins filters. Data were obtained during the pre-perihelion passage of the comet in the period December 2015 - January 2016 using the 61-cm telescope at the Scalnat\'{e} Pleco observatory. Analyzing the dust productivity via $Af\rho$ proxy, we revealed a sharp increase in...
The processing and analysis of photometric and spectral data obtained for the long-period comet C / 2015 VL62 (Lemmon-Yeung-PanSTARRS) on the 2nd SAO 6-m telescope in 2015 was processed and analyzed. The comet was observed at a heliocentric distance of 3.8. a.u., where sublimation of water ice is not significant. Several different programs were used for processing (basic reductions) and...
In this work, we are presenting the results of astrometric, photometric, and dust productivity analysis of comet 67P/Churyumov-Gerasimenko. The results are based on 14 nights of observations at the Kyiv Comet Station (MPC Code 585) during the near-perihelion and Earth approach periods of 2021-2022. We also analyzed the photometric and astrometric data of 67P comet appearance in the 1969-2022...
Metal asteroids are lurking somewhere in the asteroid belt, concealing a source of extraterrestrial resources, presenting a danger to life on Earth, and holding keys to the early history of the Solar System.
We know their existence for sure as their fragments are regularly falling on the Earth's surface as iron meteorites.
We understand how metal asteroids originated at the molten...
The last decade has become a significant period for robotic exploration of the Solar system bodies. Among such research programs was The Dawn Mission to asteroid Vesta and dwarf planet Ceres. Results obtained during the mission allow us to carry out a detailed analysis of asteroid (4) Vesta surface properties by using methods that were developed and effectively used in the analysis of the Moon...
Even though more than 4000 extrasolar planets are discovered so far, Earth is the only planet in the Universe known to have life till date. Among them around 60 planets were listed as Potentially Habitable Extrasolar Planets. This list was prepared on the basis of the details from the Habitable Extrasolar planets Catalog (HEC) which is maintained by the Planetary Habitability Laboratory at the...
Currently, an array of 3 telescopes are used to detect objects of the Kuiper belt.
In practice, this is identical to photometric observations of exoplanet transits, but there is a significant difference in the time of star occultation and the shape of the light curve.
This line of research is relatively new and relevant in the field of solar system astronomy. To successfully capture the...
Weather systems are now known to be ubiquitous on brown dwarfs, and probably also on all extrasolar planets with atmospheres. Brightness monitoring of rotating brown dwarfs and exoplanets has revealed storm- and band-like cloud structures, much like on solar system planets. Spectroscopic monitoring has probed the altitudes and chemistry of the constituent cloud layers. Astronomy is thus...
Earth-like exoplanets, defined to be rocky extrasolar planets in the habitable zone of their host stars, are of particular interest in the search for life in the universe. The Photometric Observations of Exoplanet Transits (POET) satellite is a microsatellite in development with a mission to discover Earth-like exoplanets around ultracool dwarfs (UCDs) through the transit method. UCDs are M7...
A double-precision format can be used easily for single-precision computa- tions, while for double-precision computations, extended or higher precision may not be enough in some formats such as binary64 in IEEE 754-2008 standard. In this study, by using floating-point arithmetics, the required algorithms to solve the N-body problem more accurately than ordinary computations have been...
We report the results of the investigation of five planetary systems TrES-3b, Kepler-17b, WASP-3b, Qatar-1b, and Qatar-2b. For the exoplanets TrES-3b, Kepler-17b, WASP-3b, and Qatar-1b, the obtained results of the center-transit time, depth and length of transit agree with the ephemeris data, while for two observations of the Qatar-2 system for the planet Qatar-2b there is a clear decreasing...
We present a comparative analysis of observations of the selected exoplanet transits obtained at the Kyiv Comet station with the database of the TESS (Transiting Exoplanet Survey Satellite) and Kepler space telescopes. The light curves obtained by the TESS and Kepler orbital telescopes were processed using a program based on the Python package Lightkurve 2.3v which is freely available in the...
