NASA's OSIRIS-REx extends Bennu
November 4, 2018 | News Beezer
This set of 16 images shows the steady approach of the OSIRIS REx spacecraft to the asteroid Bennu in the latter half of October 2018. From October 12-29, the long-range PolyCam camera took an optical one day Navigation screen on except on 16 and 17 October, when PolyCam was not intended for taking pictures.
The spacecraft was about 44,000 km from Bennu for the first image – a distance several thousand miles greater than the circumference of the Earth. The last image was taken from a distance of approximately 200 miles (320 km) or slightly less than the distance between Los Angeles and Las Vegas.
NASA's OSIRIS-REx Performs Third Asteroid Approach Maneuver
NASA's OSIRIS-REx spacecraft today completed the third Asteroid Approach maneuver (AAM-3). The Trajectory Correction maneuver (TCM) was fired in a series of two braking maneuvers to reduce the spacecraft's velocity relative to Bennu from about 5.2 m / s to 0.1
1 m / s. Due to the caveat that scientific instruments should not be too focused on the sun, this maneuver was conceived as two separate burns of 2.6 m / sec (5.8 miles per second) at a speed change of about 5.13 m / s (11.5 miles per hour). sec).
The mission team will continue to investigate telemetry and tracking data next week to review the new trajectory. The maneuver was aimed at flying down a corridor through a corridor designed for collecting high-resolution images to create a Bennu shape model.
The OSIRIS REx spacecraft is in a six-week series of final approach maneuvers. AAM-1 and AAM-2, which were executed on October 1 and 15, slowed the spacecraft by a total of about 486 m / sec. The last of the burns, AAM-4, is scheduled for November 12th and will set the spacecraft's trajectory to reach a position of 20 km (24 km) from Bennu on December 3rd.