Latest Updates From NASA on OSIRIS-REx’s Mission to Asteroid Bennu

This mosaic image of asteroid Bennu is composed of 12 PolyCam images collected on Dec. 2, 2018, by the OSIRIS-REx spacecraft from a range of 15 miles (24 km). (Credits: NASA/University of Arizona)

January 14, 2019

The OSIRIS-REx spacecraft continues to orbit Bennu at an altitude ranging from 1.6 to 2.1 km, with an orbital period of 61 hours. The spacecraft has completed 5.5 orbits of Bennu to date. The one-way communication time from the spacecraft back to Earth is around 5.5 minutes.

On the ground, the mission held its 14th Science Team Meeting at the University of Arizona last week. This was the first science team meeting since the spacecraft’s arrival at the asteroid, which means it was also the first gathering where the entire science team was able to work with detailed Bennu data from the spacecraft.

January 07, 2019

On Dec. 29 and 31, the OSIRIS-REx spacecraft successfully completed the two maneuvers required to enter orbit about Bennu. The accurate performance of these orbit insertion maneuvers, as well as the continued accurate navigation performance since orbit insertion, allowed for the wave-off of several planned updates to the spacecraft’s orbit determination (OD). The mission’s navigation team will continue to study OD performance over the first few weeks of spacecraft orbits to further refine and predict orbital operations – which will eventually allow the team to reduce the trim burn schedule.

The first orbit of Bennu, which started on Dec. 31, ended 61.4 hours later on Jan. 3. The spacecraft will continue orbiting the asteroid through mid-February.