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This series of 16 images shows the constant approach of the OSIRIS-REx spacecraft towards the asteroid Bennu during the last half of October 2018. From October 12 to 29, the camera long-range PolyCam captured an optical navigation image per day except on October 16 and 17, PolyCam was not programmed to take images.
The spacecraft was about 44,000 km from Bennu for the first image – a distance several thousand miles above the circumference of the Earth. The last image was taken at a distance of about 320 km, a little less than the distance between Los Angeles and Las Vegas.
NASA's OSIRIS-REx performs the third approach maneuver with an asteroid
NASA's OSIRIS-REx spacecraft has completed its third Asteroid Approach Maneuver (AAM-3) today. Trajectory maneuvering thrusters (TCMs) fired in a series of two braking maneuvers designed to slow the spacecraft's speed compared to Bennu's about 11.7 mph (5 mph). , 2 m / sec) at 0.24 mph (0.11 m / sec). Due to constraints preventing scientific instruments from moving too close to the Sun, this maneuver was designed as two separate burns of approximately 5.8 m / s (2.6 m / s) each, in order to achieve a change. net speed of approximately 5.5 m / s (11.5 mph). second).
The mission team will continue to review telemetry and tracking data over the next week to verify the new trajectory. The maneuver was aimed at the spacecraft flying in a corridor designed to collect high-resolution images that will be used to build a Bennu shape model.
The OSIRIS-REx spacecraft is currently conducting a series of final approach maneuvers for a duration of six weeks. AAM-1 and AAM-2, which were executed on October 1 and 15, respectively, slowed the spacecraft by a total of approximately 1,088 mph (486 m / s). The last of these burns, AAM-4, is scheduled for November 12 and will adjust the trajectory of the probe to arrive at a position 20 km from Bennu on 3 December.
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NASA's Jupiter Trojans mission gave green light to development
Greenbelt MD (SPX) October 31, 2018
NASA's mission to make the first reconnaissance of the Trojan horses, a population of primitive asteroids in orbit around Jupiter, has reached a crucial milestone. NASA has agreed to the commissioning and launch in 2021 of the Lucy spacecraft.
The confirmatory review, known officially as "Key Decision Point C", allowed the project to continue in the development phase and set the costs and schedule. The confirmations review committee approved the detailed plans, the suite of instruments, the … read more
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