Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5486550 | Advances in Space Research | 2017 | 14 Pages |
Abstract
Although typically less resolved through observations, the secondary in a binary system of asteroids is an interesting target for space missions such as the Asteroid Impact Mission. Estimates of the surface temperature distribution are important for mission design. Based on known, assumed and derived physical properties, a thermophysical model of the smaller body in the 65803 Didymos system is established. Because of the unknown thermal inertia, a parameter study has been carried out for a thermal inertia range of Î=50-1000Â JÂ mâ2Â Kâ1Â sâ1/2. Results are presented for the minimum and maximum values of this range and a likely value of Î=500Â JÂ mâ2Â Kâ1Â sâ1/2. The parameter study extends from the unshadowed to the eclipsed case where shadowing through the primary is simulated in a simplified manner assuming that the orbit of the moon lies in the equatorial plane of the primary with its z-axis normal to this plane. Results from this study are used to investigate performance for instruments foreseen for the Asteroid Impact Mission. Preliminary results are obtained for the signal-to-noise ratio of a proposed thermal infrared imager. Furthermore, MASCOT-2 Lander thermal survivability has been investigated for several possible landing sites and specific settings.
Keywords
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Space and Planetary Science
Authors
Ivanka Pelivan, Line Drube, Ekkehard Kührt, Jörn Helbert, Jens Biele, Michael Maibaum, Barbara Cozzoni, Valentina Lommatsch,