HAMO, (aka High Altitude Mapping Orbit) |
HAMO, (aka High Altitude Mapping Orbit) |
Sep 16 2011, 11:47 AM
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#31
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Senior Member Group: Members Posts: 3008 Joined: 30-October 04 Member No.: 105 |
Yes, we'ev got a lot of puzzle-pieces to fit and assemble. The duck-feet look like chicken-feet which are starting to look like talons...
--Bill -------------------- |
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Sep 16 2011, 02:54 PM
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#32
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Solar System Cartographer Group: Members Posts: 10227 Joined: 5-April 05 From: Canada Member No.: 227 |
Many great new pics at the Photojournal today including this new map:
http://photojournal.jpl.nasa.gov/catalog/PIA14703 including a gridded version. The coordinate system does not match the old one derived from Hubble images, a point that is causing some controversy, but I have little doubt that this will become the official coordinate system eventually. Another image in the new set defines the prime meridian marker: http://photojournal.jpl.nasa.gov/catalog/PIA14715 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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Sep 16 2011, 03:39 PM
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#33
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Solar System Cartographer Group: Members Posts: 10227 Joined: 5-April 05 From: Canada Member No.: 227 |
-------------------- ... 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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Sep 16 2011, 05:55 PM
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#34
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Senior Member Group: Members Posts: 1592 Joined: 14-October 05 From: Vermont Member No.: 530 |
Also cataloged here:
http://dawn.jpl.nasa.gov/multimedia/vesta_dawn_gallery.asp It's amazing how there are some very distorted ancient basins in the more tropical latitudes. And perhaps another giant basin that creates a gap in the south polar crater "rim." And the grooves aren't equidistant from the center of the southern crater, are they? |
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Sep 16 2011, 07:19 PM
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#35
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Member Group: Members Posts: 207 Joined: 6-March 07 From: houston, texas Member No.: 1828 |
Also cataloged here: http://dawn.jpl.nasa.gov/multimedia/vesta_dawn_gallery.asp It's amazing how there are some very distorted ancient basins in the more tropical latitudes. And perhaps another giant basin that creates a gap in the south polar crater "rim." And the grooves aren't equidistant from the center of the southern crater, are they? Sharp eyes you have there! we have been discussing both aspects (ancient degraded craters, and the large "Giant basin" as you call it, for several weeks. Vesta definitely has a history predating the large south polar basin. -------------------- Dr. Paul Schenk, Lunar and Planetary Institute, Houston TX
http://stereomoons.blogspot.com; http://www.youtube.com/galsat400; http://www.lpi.usra.edu/science/schenk/ |
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Sep 17 2011, 11:49 PM
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#36
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Solar System Cartographer Group: Members Posts: 10227 Joined: 5-April 05 From: Canada Member No.: 227 |
http://www.dawn.mps.mpg.de/index.php?id=17...de9d31da5358ace
False color map of Vesta - very nice! It's not the full range of longitudes, only about 240 degrees long, and it doesn't register exactly with the recent base map (different projection), but it is interesting. This barely gets into the south polar depression at its southern edge. 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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Sep 18 2011, 12:14 PM
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#37
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Senior Member Group: Moderator Posts: 2785 Joined: 10-November 06 From: Pasadena, CA Member No.: 1345 |
Love it! Sooo cool! How about that massive chasma across the middle? (Blue material in false color)
-------------------- Some higher resolution images available at my photostream: http://www.flickr.com/photos/31678681@N07/
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Sep 18 2011, 03:47 PM
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#38
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Solar System Cartographer Group: Members Posts: 10227 Joined: 5-April 05 From: Canada Member No.: 227 |
-------------------- ... 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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Sep 19 2011, 04:12 PM
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#39
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Senior Member Group: Members Posts: 1887 Joined: 20-November 04 From: Iowa Member No.: 110 |
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Sep 19 2011, 05:02 PM
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#40
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Member Group: Members Posts: 259 Joined: 23-January 05 From: Seattle, WA Member No.: 156 |
It's clearly a basin. The trick is, what caused it? That wonderful south polar impact threw up a huge amount of ejecta, a fair portion of which would have fallen back to the surface in all sorts of interesting ways. Shaking from the impact doubtless created some interesting structures. Based on what we know so far, Vesta's going to be a tough (and tasty!) nut to crack.
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Sep 19 2011, 08:59 PM
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#41
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
I had an interesting and very pleasant communication with Dr. Marc Rayman; he explained me that, until few hours ago, Vesta distance reported in the Simulator was based on extrapolated values of distance from asteroid centre, not height. I corrected my database and now is clear that Dawn is very close to HAMO final orbit, both in terms of height and speed (685 km and 135 m/s):
update: in the bottom/left plot I changed potential energy (now represented with the correct negative sign) and I added total energy curve (kinetic+potential). -------------------- I always think before posting! - Marco -
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Sep 21 2011, 04:34 PM
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#42
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Junior Member Group: Members Posts: 50 Joined: 27-June 11 From: Katlenburg-Lindau, Lower Saxony, Germany Member No.: 6038 |
Love it! Sooo cool! How about that massive chasma across the middle? (Blue material in false color) Hi Mike, The blue material in the false color composite seems to be the ejecta blanket from the snowman crater(s). It is known to be remarkably dark and it was named in the past... Olbers Regio. Cheers. -------------------- |
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Sep 21 2011, 05:24 PM
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#43
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Solar System Cartographer Group: Members Posts: 10227 Joined: 5-April 05 From: Canada Member No.: 227 |
Yes! It's very interesting to overlay the Hubble compositional maps (in Li et al., Icarus 208 (2010) 238–251, for instance) over the new maps. Even quite small crater ejecta deposits line up very well. The two 'red' patches (false color) were clearly seen, but mapped as different things (Eucrite and weathered materials). No doubt we'll be getting team publications on this in due course.
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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Sep 21 2011, 06:41 PM
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#44
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Member Group: Members Posts: 813 Joined: 29-December 05 From: NE Oh, USA Member No.: 627 |
In Universe Today is an interview with Prof. Chris Russell and Carol Raymond.
South pole impact feature has been officially named Rhea Silvia after the mother of Romulus and Remus, mthyical mother of the Vestal virgins. Prof. Chris Russell “We have set ourselves a target to gather everything we know about the south pole impact feature and expect to have a press release from what ever we conclude at the GSA (Geological Society of America) meeting on October 12. “We will tell the public what the options are. “We do not have a good analog to Vesta anywhere else in the Solar System and we’ll be studying it very intently.” Sorry for the long url... http://www.universetoday.com/89093/rhea-si...her/#more-89093 Craig |
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Sep 21 2011, 06:53 PM
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#45
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Member Group: Members Posts: 813 Joined: 29-December 05 From: NE Oh, USA Member No.: 627 |
GSA meeting 10/12/11... DAWN session
Dawn at Vesta: Initial Results from the Survey Orbit http://gsa.confex.com/gsa/2011AM/finalprog...ssion_28729.htm 12 presentations! Craig |
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