Masses of asteroids 10 Hygiea and 152 Atala obtained
by the dynamical method
Yu. A. Chernetenko1, A. V. Ivantsov2,
1Institute of Applied Astronomy of RAS, St. Petersburg, Russia
2Research Institute Nikolaev Astronomical Observatory, Nikolaev, Ukraine
Abstract:
Masses of asteroids 10 Hygiea and 152 Atala have been obtained by the dynamical
method. Some other asteroids were used as test particles. We evaluated
the contributions from different perturbing asteroids and the additional
acceleration caused by the Yarkovsky effect in determining the masses.
The influence of different criteria for elimination of erroneous observations
on the value of determined mass was studied. The final mass values were
obtained by common solutions based on optical observations of eight perturbed
asteroids for 10 Hygiea
[m10 = 4.03 ± 0.10 (10-11 ΜSun)]
and
of three perturbed asteroids for 152 Atala
[m152 = 1.34 ± 0.27 (10-11 ΜSun)].
Key words:
Very Long Baseline Interferometry (VLBI), Small Solar System Body (SSSB), mass of asteroids 10 Hygiea, mass of asteroids 152 Atala, the dynamical method, perturbing asteroids, the additional acceleration, the Yarkovsky effect, elimination of erroneous observations, optical observations.