Remote chance of recontact

Details Remote chance of recontact Remote chance of recontact

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988fmet.symp..507e&link_type=abstract

In its Flight Mechanics/Estimation Theory Symposium 1988 p 507-529 (SEE N89-15934 08-13)

Mathematics

Probability

Collision Avoidance, Cosmic Background Explorer Satellite, Ejection, External Stores, Space Debris, Cables, Heat Shielding, Orbital Mechanics

Scientific paper

The ejection of appendages with uncertain drag characteristics presents a concern for eventual recontact. Recontact shortly after release can be prevented by avoiding ejection in a plane perpendicular to the velocity. For ejection tangential to the orbit, the likelihood of recontact within a year is high in the absence of drag and oblateness. The optimum direction of ejection of the thermal shield cable and an overestimate of the recontact probability are determined for the Cosmic Background Explorer (COBE) mission when drag, oblateness, and solar/lunar perturbations are present. The probability is small but possibly significant.

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