Author Topic: OSIRIS-REx mission updates  (Read 1351 times)

Offline eeergo

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OSIRIS-REx mission updates
« on: 09/27/2017 10:42 AM »
Starting this thread after OSIRIS-REx's flyby of Earth on September 22nd, dealing with mission updates now that the trajectory towards Bennu has been roughly acquired.


Launch thread: http://forum.nasaspaceflight.com/index.php?topic=26459.0


Beautiful Earth IR and VIS/IR spectra acquired during last week's flyby. Smooth curves show reference spectra for black bodies at different temperatures, indicating what the spectrum would look like with no absorption/emission.
-DaviD-

Offline NGCHunter

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Re: OSIRIS-REx mission updates
« Reply #1 on: 09/27/2017 05:57 PM »
I tracked the flyby of OSIRIS-REx using telescopes from the iTelescope network in Australia, New Mexico, and my own personal telescope in Florida.  Here are my images of the flyby as well as the resulting astrometry and orbital data:

Looks like it's on-course for Bennu, as expected.

Offline zubenelgenubi

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Re: OSIRIS-REx mission updates
« Reply #2 on: 10/13/2017 06:40 PM »
OSIRIS-REx Images Earth and the Moon in Color
October 10, 2017
https://www.asteroidmission.org/?latest-news=osiris-rex-images-earth-moon-color

This color composite image of Earth and the Moon was taken Oct. 2, 2017 (ten days after OSIRIS-REx performed its Earth Gravity Assist maneuver), using MapCam, the mid-range scientific camera onboard the spacecraft. The distance to Earth was approximately 3,180,000 miles (5,120,000 km)—or about 13 times the distance between the Earth and Moon.

MapCam, part of the OSIRIS-REx Camera Suite (OCAMS) operated by the University of Arizona, has four color filters. To produce this image, three of them (b, v and w) were treated as a blue-green-red triplet, co-registered and stacked. The Earth and Moon were each color-corrected, and the Moon was “stretched” (brightened) to make it more easily visible.

To capture the image, OSIRIS-REx pointed its instrument deck back toward Earth from a distance of approximately 3,180,000 miles (5,120,000 km). At that range, the Moon—which was 3,370,000 miles (5,420,000 km) away from the spacecraft—appeared just inside MapCam’s field of view, allowing both planetary bodies to be captured in the same frame.
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Offline DF2MZ

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Re: OSIRIS-REx mission updates
« Reply #3 on: 01/19/2018 01:00 PM »
I am not sure if this is exactly the best thread to post. Moderators feel free to move elsewhere if appropriate.

After the earth flyby I observed Osiris-Rex's x-band downlink up to a distance of 10 Mio km. It was transmitting on its LGA then.
On Monday, Jan 15th it switched to its HGA and is now in reach of my small x-band dish again at a distance of roughly 63 Mkm. It is a solid carrier signal. Here is the screenshot from this mornings downlink session with Canberra.

The carrier switches on and quickly locks on the ground station at 03:00 UTC. The signal switches off at 04:45 UTC. The massive vertical line at 0 Hz is an artifact of my receiver.
« Last Edit: 01/19/2018 01:04 PM by DF2MZ »

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