Asteroid approach, Science operations begin! |
Asteroid approach, Science operations begin! |
Aug 24 2018, 06:48 PM
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#1
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Member Group: Members Posts: 544 Joined: 17-November 05 From: Oklahoma Member No.: 557 |
NASA update on the OSIRIS-REx mission, includes first picture of the asteroid from the spacecraft.
Begins Operations |
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Oct 6 2018, 10:33 PM
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#2
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Junior Member Group: Members Posts: 51 Joined: 31-December 10 From: Earth Member No.: 5589 |
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Oct 19 2018, 02:12 PM
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#3
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Senior Member Group: Members Posts: 2106 Joined: 13-February 10 From: Ontario Member No.: 5221 |
New images! (they will be leaving the '8-bit' phase pretty soon)
https://www.asteroidmission.org/bennu-oct-2018-pixel-zoom/ |
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Oct 19 2018, 04:16 PM
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#4
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
When I first read this I assumed that there was an error in the captions: at a little under 10,000 km range Bennu is only 3.7 pixels in Polycam? But it's true, and that just goes to show how dinky Bennu is. Polycam's IFOV is 13.5 urad so at range R Bennu (246 meters mean radius) subtends 0.246*2/(R*13.5e-6) pixels. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Oct 24 2018, 08:03 PM
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#5
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Senior Member Group: Members Posts: 2106 Joined: 13-February 10 From: Ontario Member No.: 5221 |
https://www.asteroidmission.org/bennu-jupit...exobservations/
New image, plus a comparison with the Jupiter observation from last year to illustrate the albedo difference. Seems like another Ryugu so far.... |
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Oct 26 2018, 01:18 AM
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#6
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Senior Member Group: Members Posts: 1452 Joined: 26-July 08 Member No.: 4270 |
New rotation movie from 3000 km taken on 23 Oct 2018. We can see surface features, even if it's not clear exactly what they are.
https://www.asteroidmission.org/bennu-13px/ -------------------- -- Hungry4info (Sirius_Alpha)
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Oct 26 2018, 05:37 AM
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#7
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Solar System Cartographer Group: Members Posts: 10226 Joined: 5-April 05 From: Canada Member No.: 227 |
These are the 3 frames in that short movie, a bit processed. One suggests a crater, maybe bigger (relatively) than any on Ryugu.
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Guest_mcmcmc_* |
Oct 29 2018, 01:39 PM
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#8
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Guests |
Countdowns:
https://programmi.000webhostapp.com/osiris/...is-counter.html They are based on odd data: "future telemetries" available as "digital readouts", which always says 00:00 is the time of the maneuvers, and PDF schedule, I don't know where to find better data. |
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Guest_mcmcmc_* |
Oct 29 2018, 02:39 PM
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#9
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Guests |
Countdowns: Found more rich but less embellished countdowns: http://www.whereisroadster.com/osiris_rex/ |
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Oct 30 2018, 07:41 PM
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#10
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
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Oct 30 2018, 09:43 PM
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#11
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Solar System Cartographer Group: Members Posts: 10226 Joined: 5-April 05 From: Canada Member No.: 227 |
One very good thing about this is that I can use exactly the same map projection for Bennu as I used for Ryugu. Only the scale has to change.
Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Guest_mcmcmc_* |
Oct 31 2018, 01:44 PM
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#12
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Guests |
These direct query links to NASA Horizons provide objects distance from the Sun in km:
OSIRIS-Rex Bennu Look for "$$SOE" in result; distance in km is value 3 counting from 0. Resulting current distance between OSIRIS-Rex and Bennu: 2018-Oct-31 14:40 - 236.16 km It looks quite precise despite the big distance: this method gives 7 km as Hayabusa2-Ryugu distance, which is currently 5 km. I think the distance is based on light travel time. |
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Oct 31 2018, 04:09 PM
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#13
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
There are SPICE kernels for Orex at https://naif.jpl.nasa.gov/pub/naif/ORX/kernels/ -- AFAIK this is what the flight team is using.
-------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Guest_mcmcmc_* |
Oct 31 2018, 04:58 PM
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#14
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Guests |
There are SPICE kernels for Orex at https://naif.jpl.nasa.gov/pub/naif/ORX/kernels/ -- AFAIK this is what the flight team is using. I have no idea of what SPICE kernels are. |
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Oct 31 2018, 08:44 PM
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#15
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
I have no idea of what SPICE kernels are. They are files that capture the position and orientation of spacecraft and solar system bodies, used for mission planning and data analysis. https://naif.jpl.nasa.gov/naif/aboutspice.html If NASA Horizons does what you want, then by all means use it. I'm not certain how frequently it's updated, however. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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