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Asteroid approach, Science operations begin!
mcmcmc
post Nov 1 2018, 04:21 PM
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QUOTE (mcaplinger @ Oct 31 2018, 09:44 PM) *
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.

It's not clear to me how these data about spacecrafts are produced; are they recorded data up to current date and calculated data from now on? i.e. are they daily updated? or just calculated from mission schedules? OSIRIS data clearly show the trajectory correction maneuvers occurred during last months, but Hayabusa data show almost constant distance 7000m from Ryugu for same period, which is not true because Hayabusa actually passed from 20.000 to 20m and the other way round several times.
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djellison
post Nov 1 2018, 05:34 PM
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QUOTE (mcmcmc @ Nov 1 2018, 08:21 AM) *
It's not clear to me how these data about spacecrafts are produced; are they recorded data up to current date and calculated data from now on? i.e. are they daily updated? or just calculated from mission schedules?


Yes. All of the above. Sometimes they are reconstructed. Sometimes they are predicted. Sometimes updated very regularly. Sometimes not. Metadata is usually included to explain the source of the data used.
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Phil Stooke
post Nov 2 2018, 08:07 PM
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An approach GIF was just released - these are the 4 best frames, rescaled. The surface is becoming clearer.

Phil

Attached Image


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... because the Solar System ain't gonna map itself.
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Hungry4info
post Nov 6 2018, 01:22 AM
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Two Sides of Bennu

Attached thumbnail(s)
Attached Image
 


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-- Hungry4info (Sirius_Alpha)
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Explorer1
post Nov 6 2018, 03:46 AM
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Interesting dark patches in the southern hemisphere on the right image, and what might be a crater on the far right limb?
EDIT: rotation movie out! I'll leave it to the experts.... https://www.asteroidmission.org/bennu-rotation_20181102/
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charborob
post Nov 6 2018, 09:09 PM
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Bennu full rotation at 200 pixels.
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Phil Stooke
post Nov 7 2018, 12:10 AM
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Beautiful! That should be enough for a preliminary shape model and map.

Phil


--------------------
... because the Solar System ain't gonna map itself.
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mcmcmc
post Nov 7 2018, 11:13 AM
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QUOTE (Phil Stooke @ Nov 7 2018, 01:10 AM) *
Beautiful! That should be enough for a preliminary shape model and map.

Phil

Shape model (just look, don't touch :-( ):
https://twitter.com/3Dmattias/status/1059936642612502529
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walfy
post Nov 8 2018, 06:05 AM
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Here's a quickly rotating GIF in 3D of it, with contrast boost. Will post a slower next.

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walfy
post Nov 8 2018, 06:11 AM
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This version spins much slower, at 3 second intervals, less jarring on the eyes:

Attached Image

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Phil Stooke
post Nov 8 2018, 07:33 AM
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Nice! And another way of presenting the data in the animation, a set of frames. The last one is a repeat of the first one. A bit of a contrast stretch was applied.

Phil

Attached Image


--------------------
... because the Solar System ain't gonna map itself.
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Roman Tkachenko
post Nov 9 2018, 01:17 PM
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Asteroid Bennu Rotation (3D animation)



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mcmcmc
post Nov 12 2018, 09:15 PM
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Interactive video:
http://win98.altervista.org/space/explorat...r/rotation.html
(allow several seconds until all 250 frames load).


Updated monitoring page:
http://win98.altervista.org/space/exploration
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