Estimating the Mass of Asteroid 433 Eros During the NEAR Spacecraft Flyby-Reference-Cited by-同舟云学术

Estimating the Mass of Asteroid 433 Eros During the NEAR Spacecraft Flyby

Published:1999-07-23 Issue:5427 Volume:285 Page:560-561
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Yeomans D. K.¹,Antreasian P. G.¹,Cheng A.²,Dunham D. W.²,Farquhar R. W.²,Gaskell R. W.¹,Giorgini J. D.¹,Helfrich C. E.¹,Konopliv A. S.¹,McAdams J. V.²,Miller J. K.¹,Owen W. M.¹,Thomas P. C.³,Veverka J.³,Williams B. G.¹

Affiliation:

1. Navigation and Flight Mechanics Section at the Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA.

2. Applied Physics Laboratory, Johns Hopkins University, Laurel, MD 20723, USA.

3. Cornell University, Ithaca, NY 14853, USA.

Abstract

The Near Earth Asteroid Rendezvous (NEAR) spacecraft flew within 3830 kilometers of asteroid 433 Eros on 23 December 1998. The gravitational perturbation on NEAR was evident in the spacecraft tracking data. Ground-based Doppler and range tracking of the spacecraft as well as spacecraft images of the asteroid's center of figure and surface features were used to determine the mass and rotation pole of Eros. The mass of Eros is (7.2 ± 1.8) × 10 18 grams and, coupled with a volume estimate provided by the NEAR imaging team, this mass suggests a bulk density of 2.5 ± 0.8 grams per cubic centimeter. The rotation pole position is 15.6 (±3.7) degrees in right ascension and 16.4 (±1.8) degrees in declination, which is consistent with ground-based and NEAR imaging team observations.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference13 articles.

1. Chapman C., Meteor. Planet. Sci. 31, 699 (1996).

2. M. J. S. Belton et al. Nature 374 785 (1995).

3. D. K. Yeomans et al. Science 278 2106 (1997).

4. J. Veverka et al. ibid. p. 2109.

5. For an overview of the NEAR mission see J. Astronaut. Sci. 43 345 (1995). A science overview is given in the NEAR special issue of J. Geophys. Res. 102 23695 (1997).

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