Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999p%26ss...47..339s&link_type=abstract
Planetary and Space Science, Volume 47, Issue 3-4, p. 339-343.
Astronomy and Astrophysics
Astronomy
3
Scientific paper
ASTROD (Astrodynamical Space Test of Relativity using Optical Devices) Mission Concept uses drag-free spacecraft in solar orbits to combine high-precision measurement of relativistic effects, measurement of solar angular momentum via Lense-Thirring effect, improvement in the measurement of Gdot and the detection of low-frequency gravitational waves in a single mission. As a simple implementation, two spacecraft in separable solar orbits are considered. These drag-free spacecraft will experience gravitational perturbations of the asteroids. This will limit the accuracy of the Gdot measurement, and the accuracy of determining the orbit elements and secular relativistic effects. However, from these perturbations, the masses of larger asteroids can also be determined. In this preliminary analysis, we use the present mass estimation of Ceres, Pallas and Vesta to calculate the perturbations of the spacecraft.
Lee Daehee
Lin Simon C.
Ni Wei-Tou
Su Zheng-Yao
Wu An-Ming
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