Eclipsing binary asteroid 2000 DP107

Details Eclipsing binary asteroid 2000 DP107 Eclipsing binary asteroid 2000 DP107

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sptz.prop80084m&link_type=abstract

Spitzer Proposal ID #80084

Physics

Scientific paper

We propose thermal observations of the eclipsing binary near-Earth asteroid 2000 DP107 before, during, and after two total secondary eclipses, where the secondary component is completely eclipsed by the primary. Through previous Spitzer observations, we have demonstrated (Mueller et al., 2010) that such observations enable a uniquely direct determination of the thermal inertia. Thermal-inertia measurements are crucial for constraining the surface properties by differentiating between regolith-covered, mature surfaces and younger bare-rock surfaces. Additionally, thermal inertia governs the important (for all D<10 km objects) Yarkovsky effect, a non-gravitational orbital drift due to thermal photons. Thanks to its low-deltaV orbit and our excellent knowledge about its physical properties (to which the proposed observations will add), 2000 DP107 is a desirable, low-risk target for spacecraft exploration.

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