OSIRIS-REx Gravity Field Estimates for Bennu Using Spacecraft and Natural Particle Tracking Data

[摘要] The current best estimates of Bennu’s gravity field will be presented, based on the independent solutions from four different teams involved on the OSIRIS-REx mission. The discovery of ejected particles about Bennu that may remain in orbit for several days or more provide a unique opportunity to probe the gravity field to higher degree and order than possible by using conventional spacecraft tracking. However, the non-gravitational forces acting on these particles must also be characterized, and their impact on solution accuracy must be assessed. This talk will present the latest results from the mission, incorporating spacecraft tracking from the lowest orbit in which the satellite will be during the mission.

[发布日期] 2019-09-15

[学科分类] 天文学(综合)

[关键词] BENNU ASTEROID;OSIRIS-REX;GRAVITATIONAL FIELDS;EJECTA;SPACECRAFT TRACKING;ORBIT PERTURBATION;ASTEROID MISSIONS;ESTIMATES;NASA SPACE PROGRAMS