Physics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29h..72g&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 8, pp. 72-1, CiteID 1231, DOI 10.1029/2001GL013768
Physics
4
Geodesy And Gravity: Planetary Geodesy And Gravity (5420, 5714, 6019), Geodesy And Gravity: Instruments And Techniques, Planetology: Comets And Small Bodies: Gravitational Fields, Planetology: Solar System Objects: Asteroids And Meteoroids
Scientific paper
The gravity field for asteroid 433 Eros has been determined in terms of ellipsoidal harmonic functions by processing the Doppler tracking data of the NEAR spacecraft while it was in orbit about the asteroid. Using the same set of NEAR spacecraft Doppler tracking data, comparative descriptions of the Eros gravity field are provided for both the ellipsoidal and the traditional spherical harmonic models. It is shown that for elongated bodies, like the asteroid Eros, the ellipsoidal harmonics model permits a better representation of the gravity signature than does the spherical harmonics model. Eros has a nearly uniform density but there are negative gravity anomalies near the ends of Eros and positive gravity anomalies near the Psyche crater and the Himeros depression.
Barriot Jean-Pierre
Garmier Romain
Konopliv Alexander S.
Yeomans Donald Keith
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