Ozyrys przeleciał w pobliżu Ziemi 22.09. o 16:51 w odległości 17237 km od Ziemi przeleciała sonda
OSIRIS-REx, wykonując manewr grawitacyjny
w drodze do planetki (101955) Bennu.
http://lk.astronautilus.pl/n170916.htm#04OSIRIS-REx asteroid mission receives gravitational boost from planet EarthSeptember 22, 2017 Stephen Clark
(...) Friday’s flyby imparted a change in OSIRIS-REx’s velocity of around 8,451 mph — nearly 3.8 kilometers per second — around twice the adjustment possible if the spacecraft dedicated all of its fuel to the maneuver. (...)
“It was a way to substantially save on resources, either on the spacecraft or on the launch vehicle, or both,” said Dante Lauretta, OSIRIS-REx’s principal investigator from the University of Arizona. (...)
NASA expected to regain communications with OSIRIS-REx around 1740 GMT (1:40 p.m. EDT), and the spacecraft was to begin collecting imagery and calibration data with its science instruments around four hours after closest approach at a distance of approximately 60,000 miles (100,000 kilometers) from Earth. (...)
According to Lauretta, OSIRIS-REx’s three imaging cameras will look back at Earth and the moon for up to 10 days after the encounter, capturing close-up and long-range views, including a family portrait of the Earth-moon system. (...)
Images from the flyby will be released Tuesday, officials said. (...)
https://spaceflightnow.com/2017/09/22/osiris-rex-earth-gravity-assist/http://www.skyandtelescope.com/astronomy-news/osiris-rex-earth-flyby-friday/https://www.nasa.gov/feature/goddard/2017/asteroid-bound-spacecraft-to-slingshot-past-earthhttps://www.nasa.gov/feature/goddard/2017/asteroid-bound-spacecraft-to-slingshot-past-earth