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Gaia Data Release 3: Distribution of Spectral Groups of Near-Earth Asteroids
Kovaleva, D. A.; Shcherbina, M. P.; Shustov, B. M.
Based on the data from the third edition of the Gaia catalog, containing the reflectance spectra of asteroids, studies of near-Earth asteroids (NEAs) were carried out. The reflectance spectra of about 100 representatives of the Aten, Apollo and Amor groups were used to determine their spectral class. For 47 asteroids such an assessment was made fo…
Calculation of the Non-Gravitational A2 Parameter Using Ground-Based Observations of the Apparent Close Approaches between Near-Earth Asteroids and Gaia Stars
Gorshanov, D. L.; Khovrichev, M. Yu.; Bikulova, D. A.
The Yarkovsky effect is one of the noticeable factors in the orbital evolution of near-Earth asteroids (NEAs). The A2 non-gravitational parameter describes the corresponding acceleration in the NEA motion model. This parameter can be derived from astrometric observations of the NEA. We present the results of astrometric observations of …
Features of Designing a Star Catalog for Orientation Sensors of Space Vehicles
Avanesov, G. A.; Elyashev, Ya. D.
A brief history of the creation of star orientation sensors at the Space Research Institute of the Russian Academy of Sciences (IKI RAS) and star catalogs for them is presented. An experiment carried out in the early 1970s on synchronous photography of stars and the Earth's surface from the manned stations Salyut-2 and -3 is described. The difficu…