Explanipedia

THE R-BAND OBSERVATIONS AND COMPARISON WITH RESULTS IN THE V-BAND OF FI SGE Open

Л. Кеир, S. N. Udovichenko · 2024

We present the result of the processing of our observations of the FI Sge, the pulsating RR Lyrae type variable with the Blazhko effect in the R-band. The data were obtained during 36 nights in 2018 as well as during 13 nights in 2021. We …

ASTROMETRY OF NASA LUCY MISSION TARGETS: (617) PATROCLUS, (3548) EURYBATES, (21900) ORUS AT OPPOSITION 2021 Open

Volodymyr Troianskyi, H. Okhotko, V. Kashuba, S. N. Udovichenko, Л. Кеир , et al. · 2024

In this paper we present the result of the combined use of the OMT-800, AZT-3, KIT telescopes, and the Lemur software of the CoLiTec project. The paper considers in detail several of the astrometric observations of Jupiter Trojan asteroids…

Spins and shapes of basaltic asteroids and the missing mantle problem Open

Dagmara Oszkiewicz, Volodymyr Troianskyi, A. Galád, J. Hanuš, Josef Ďurech , et al. · 2023

Basaltic V-type asteroids are common in the inner part of the Main Asteroid Belt and much less abundant in the mid and outer parts. They are of scientific interest because they sample crusts and mantles of theoretically plentiful different…

Исследование быстрой переменности BL Lac объекта MRK 421 в оптическом диапазоне Open

А. Л. Сухарев, М. Рябов, Vladislavs Bezrukovs, О. Ульянов, S. N. Udovichenko , et al. · 2022

MRK 421, гигантская эллиптическая галактика в созвездии Большой Медведицы, ядро которой обладает всеми свойствами объекта типа BL Lac. Она демонстрирует высокую активность и переменность от радио до гамма-диапазонов на временной шкале от н…

Analysis of the IW And star ASAS J071404+7004.3 Open

Taichi Kato, Kiyoshi Kasai, Е. П. Павленко, N. Pit, A. A. Sosnovskij , et al. · 2022

We made a time-resolved photometric campaign of the bright cataclysmic variable ASAS J071404+7004.3 in 2020. Inight et al. (2022, arXiv/2109.14514) recently published time-resolved optical spectroscopy, X-ray observations and long- and sho…

Shape models and dynamical properties of basaltic asteroids outside the dynamical Vesta family Open

Volodymyr Troianskyi, Dagmara Oszkiewicz, A. Marciniak, P. Kankiewicz, Dóra Föhring , et al. · 2021

Through numerical modeling, Nesvorny et al. (2008) showed that asteroids can migrate due to Yarkovsky drift and resonances to outside of the boundaries of the Vesta family. In particular, they found that objects which end up in the scatter…

MASTER OT J172758.09+380021.5: a peculiar ER UMa-type dwarf nova, probably a missed nova in the recent past Open

Е. П. Павленко, Takeo Kato, K. A. Antonyuk, N. Pit, Л. Кеир , et al. · 2021

A CCD photometry of the dwarf nova MASTER OT J172758.09 +380021.5 was carried out in 2019 during 134 nights. Observations covered three superoutbursts, five normal outbursts and quiescence between them. The available ASASSN and ZTF data fo…

PHOTOMETRY AND THE BLAZHKO EFFECT IN THE RR Lyr VARIABLE STAR Y Vul Open

S. N. Udovichenko, Л. Кеир · 2020

The RR Lyr variable star Y Vul have been observed by using a CCD photometer during sev- eral seasons from 2011 to 2017. Nearly 5960 data points were obtained spanning over 53 nights. We found the amplitude and phase modulations with the am…

Spin rates of V-type asteroids Open

Dagmara Oszkiewicz, Volodymyr Troianskyi, Dóra Föhring, A. Galád, T. Kwiatkowski , et al. · 2020

Context. Basaltic V-type asteroids play a crucial role in studies of Solar System evolution and planetesimal formation. Comprehensive studies of their physical, dynamical, and statistical properties provide insight into these processes. Th…

Program and Results of Investigations Rapid Variability of the BL Lac Object 3C 371 in Radio and Optical Ranges Open

А. Л. Сухарев, M. I. Ryabov, Vladislavs Bezrukovs, A. Orbidans, M. Bleiders , et al. · 2020

BL Lac object 3C 371 is variable in optical and radio range, according to long-term monitoring data, for example AAVSO (American Association of Variable Star Observers) and OVRO (Owens Valley Radio Observatory). In addition, some authors n…

LITHIUM-RICH CLASSICAL CEPHEID V1033 CYG: EVOLUTIONARY STATUS Open

S. N. Udovichenko, V. V. Kovtyukh, Л. Кеир · 2019

We investigate evolutional status of cepheid V1033 Cyg in this work, its period of light variation consists 4 d .94 and the star is a real candidate on first crossing of instability stripe (IS) (as well as α of UMi). At first crossing of i…

On the irregular variations in the light curves of RY Vul Open

S. N. Udovichenko, Л. Кеир · 2018

In the Astronomical observatory of the Odesa National University traditionally study variable stars of different types: pulsating, double, irregular et al. By photometric observations it is possible to set the type of variable star, period…

PHOTOMETRY AND BLAZHKO EFFECT IN RR LYR-TYPE STAR AE LEO Open

S. N. Udovichenko, Л. Кеир · 2017

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 amp…

INTERFACE AND SOFTWARE FOR OSCILLOSCOPE COMPARATOR Open

S. N. Udovichenko · 2017

For measurement of photographic spectrograms on the comparator with the oscilloscopic guidance on line are used photoelectric moire measuring detector of linear movement of carriage with measuring plate and reversible binary-decade digit c…

THE PULSATIONS OF RADIAL VELOCITIES AMPLITUDE OF V 474 MON - THE DELTA SCT TYPE STAR Open

S. N. Udovichenko, L. E. Lysova, O. P. Paramonova · 2017

The variations of radial velocities amplitude of V474 Mon - the Delta Set type star have been determined from spectrograms obtained at the 6-m telescope. Lines of metals are measured. The curves of radial velosities show both primary and s…

HYDROGEN LINES IN B-e STARS ENVELOPES Open

S. N. Udovichenko, E. I. Konchagina · 2017

The investigation of Balmer Hα and Hb line profiles for 28 Be and Be-shell stars have been carried out. The emission profiles of stars were obtained by subtracting from “A Be star atlas” photospheric line profiles which were computed from …

ON THE MAGNETIC VARIABILITY OF PULSATING STARS Open

S. N. Udovichenko, Yu. S. Romanov, M. S. Frolov · 2017

The variations of the effective magnetic field strength of the magnetic stars a 2 CVn, b CrB and of the pulsating stars RR Lyr and V 474 Mon are studied on the base of the spectrograms obtained at the 6-m telescope. The variation with the …

ON THE PHOTOMETRY OF CC ANDROMEDAE Open

S. N. Udovichenko · 2017

The photometric observation of δ Scuti star CC Andromedae using the 48 cm telescope with CCD photometer and the V filter of the UBV system at the Astronomical Observatory of Odessa National University have been made. The calculations of th…

PHOTOMETRIC INVESTIGATION OF XX CYG Open

S. N. Udovichenko · 2017

The photometric observations of SX Phe type star XX Cyg (V=12m, A5) were made in five nights using 48 cm reflector at the Astronomical Observatory of Odessa National University. The CCD photometer and the V filter of the UBV system was use…

PHOTOMETRIC OBSERVATIONS OF A NEW ECLIPSING BINARY NSVS 8213217 Open

S. N. Udovichenko · 2016

The photometric CCD observations for new suspected eclipsing binary NSVS8213217 inAstronomical stations nearOdessa(Ukraine) have been carried out. The light curves in V system were obtained and new adjusting period and light element was re…

PHOTOMETRY AND MODULATION OF LIGHT CURVES IN THE BLAZHKO STAR V365 HER Open

S. N. Udovichenko · 2015

The photometric CCD observations for the Blazhko RR Lyr type star V365 Her in Astronomical stations near Odessa (Ukraine) have been carried out. The light curves in V system were obtained and the frequency Fourier analyse was performed.The…

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