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Estimating Masses of Asteroids

G. A. Krasinsky, E. V. Pitjeva, M. V. Vasilyev, E. I. Yagudina

Transactions of IAA RAS, issue 6, 114–147 (2001)

Abstract

Comparison of masses of asteroids derived by dynamical methods (mainly from mutual perturbations of asteroids with close encounters) with ones obtained by astrophysical methods is carried out. It is shown that the asteroids with masses > 10^-12 Msun markedly affect the orbit of Mars on the level of accuracy of ranging measurements to the martian landers Viking-1,2 and Pathfinder. The dynamical and astrophysical methods seem to be complimentary. An attempt is undertaken to extent the list of 300 perturbing asteroids accounted in the DE405 ephemerides. Several tests were tried in which the different sets of perturbing asteroids and their masses (up to 351 simultaneously integrating asteroids) varied when processing the observations of the landers. Overall perturbing effect of remaining asteroids (the 300 biggest ones are excluded) has been modeled as being caused by a ring in the ecliptic plane. Mass M and radius R of the ring are estimated as M≈518*10^-12 Msun.

Citation

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G. A. Krasinsky, E. V. Pitjeva, M. V. Vasilyev, E. I. Yagudina. Estimating Masses of Asteroids // Transactions of IAA RAS. — 2001. — Issue 6. — P. 114–147.

@article{krasinsky2001,
  abstract = {Comparison of masses of asteroids derived by dynamical methods (mainly from mutual perturbations of asteroids with close encounters) with ones obtained by astrophysical methods is carried out. It is shown that the asteroids with masses > 10^-12 Msun markedly affect the orbit of Mars on the level of accuracy of ranging measurements to the martian landers Viking-1,2 and Pathfinder. The dynamical and astrophysical methods seem to be complimentary. An attempt is undertaken to extent the list of 300 perturbing asteroids accounted in the DE405 ephemerides. Several tests were tried in which the different sets of perturbing asteroids and their masses (up to 351 simultaneously integrating asteroids) varied when processing the observations of the landers. Overall perturbing effect of remaining asteroids (the 300 biggest ones are excluded) has been modeled as being caused by a ring in the ecliptic plane. Mass M and radius R of the ring are estimated as M≈518*10^-12 Msun.},
  author = {G.~A. Krasinsky and E.~V. Pitjeva and M.~V. Vasilyev and E.~I. Yagudina},
  issue = {6},
  journal = {Transactions of IAA RAS},
  pages = {114--147},
  title = {Estimating Masses of Asteroids},
  url = {http://iaaras.ru/en/library/paper/1621/},
  year = {2001}
}

TY  - JOUR
TI  - Estimating Masses of Asteroids
AU  - Krasinsky, G. A.
AU  - Pitjeva, E. V.
AU  - Vasilyev, M. V.
AU  - Yagudina, E. I.
PY  - 2001
T2  - Transactions of IAA RAS
IS  - 6
SP  - 114
AB  - Comparison of masses of asteroids derived by dynamical methods
(mainly from mutual perturbations of asteroids with close encounters)
with ones obtained by astrophysical methods is carried out. It is
shown that the asteroids with masses > 10^-12 Msun markedly affect
the orbit of Mars on the level of accuracy of ranging measurements to
the martian landers Viking-1,2 and Pathfinder. The dynamical and
astrophysical methods seem to be complimentary. An attempt is
undertaken to extent the list of 300 perturbing asteroids accounted
in the DE405 ephemerides. Several tests were tried in which the
different sets of perturbing asteroids and their masses (up to 351
simultaneously integrating asteroids) varied when processing the
observations of the landers. Overall perturbing effect of remaining
asteroids (the 300 biggest ones are excluded) has been modeled as
being caused by a ring in the ecliptic plane. Mass M and radius R of
the ring are estimated as M≈518*10^-12 Msun.
UR  - http://iaaras.ru/en/library/paper/1621/
ER  -