MSL - Astronomical Observations, Phobos/Deimos, planetary/celestial observations and more |
MSL - Astronomical Observations, Phobos/Deimos, planetary/celestial observations and more |
Jun 29 2013, 05:25 PM
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#1
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Senior Member Group: Members Posts: 4252 Joined: 17-January 05 Member No.: 152 |
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Aug 3 2013, 04:16 PM
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#2
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Remember that Phobos is synchronously rotating, just like our moon, and Stickey faces more-or-less forward along the orbit, so it's always going to be closer to the limb than to the center of the disk.
A corollary to that is that any spacecraft that either sits on the surface or is in a low, circular mapping orbit (MGS, ODY, MRO) will always only see the Mars-facing hemisphere of Phobos. Only Mars Express and earlier spacecraft have seen other sides. -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Aug 3 2013, 05:08 PM
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
There's also what appears to be faint "mars-shine" illuminating Phobos if you play with image brightness:
Do we expect the original raw data to be overexposed, because the thumbnails kind of give the impression that the images are well-exposed? EDIT: Ahh, I see now. That one full-res image corresponds to an overexposed thumbnail as well. Other shots should look pretty spectacular, then. -------------------- |
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Aug 3 2013, 05:17 PM
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#4
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Senior Member Group: Members Posts: 2517 Joined: 13-September 05 Member No.: 497 |
Do we expect the original raw data to be overexposed, because the thumbnails kind of give the impression that the images are well-exposed? The full-res image you're looking at is from sequence 1424 and the better-exposed thumbnails from sequence 1423, which presumably have different exposure times. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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