LAMO, aka Low Altitude Mapping Orbit |
LAMO, aka Low Altitude Mapping Orbit |
Dec 8 2011, 06:08 AM
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#31
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Senior Member Group: Members Posts: 1592 Joined: 14-October 05 From: Vermont Member No.: 530 |
Several updates here:
http://dawn.jpl.nasa.gov/multimedia/vesta_dawn_gallery.asp Dated Dec. 5th, but I think they showed up more recently. |
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Dec 9 2011, 07:38 PM
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#32
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Junior Member Group: Members Posts: 35 Joined: 28-September 05 From: Seattle, WA Member No.: 514 |
Now that Robert Gaskell's shape model of Vesta is available, I used it to create a movie comparing Vesta to two other Solar System bodies: Phoebe and Mimas. The movie contrasts the sizes, shapes and rotation states of the three objects. Though I'm familiar with the numbers, it's still impressive to see just how quickly Vesta spins (though I suppose contrasting it with a synchronously rotating moon isn't the fairest comparison.)
http://www.youtube.com/watch?v=dSGh_JHNFSI...eature=youtu.be Enjoy! --Chris |
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Dec 9 2011, 07:51 PM
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#33
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Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
Beautiful. Thanks for sharing.
-------------------- If Occam had heard my theory, things would be very different now.
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Dec 10 2011, 11:04 PM
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#34
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Junior Member Group: Members Posts: 22 Joined: 23-August 11 From: France Member No.: 6134 |
With the shape from Dr. Robert Gaskell (and providing by NAIF), I make this video, projecting some pictures from Survey Orbit to the shape.
And there's the bumpMap (simple cylindrical projection). It can be used with Celestia. |
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Dec 11 2011, 02:55 AM
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#35
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Solar System Cartographer Group: Members Posts: 10231 Joined: 5-April 05 From: Canada Member No.: 227 |
Nice! This can be turned into a shaded relief map simply by using the 'emboss' filter in Photoshop, or its equivalent. Here's one version - varying the illumination direction makes drastic changes to the appearance of the map. The two distinct sets of troughs show up very well here.
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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Dec 11 2011, 07:23 AM
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#36
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Senior Member Group: Members Posts: 3009 Joined: 30-October 04 Member No.: 105 |
And Nice! ^2, Phil. You can see a lot of history there.
--Bill -------------------- |
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Dec 11 2011, 08:34 AM
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#37
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
Beautiful simulated views in this video, Sarunia! About the bumpMap, do you know which basic shape should I use with software other than Celestia?
(if is an ellipsoid, I would like to know axes lenghts...) -------------------- I always think before posting! - Marco -
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Dec 11 2011, 04:47 PM
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#38
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Senior Member Group: Members Posts: 1669 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
Videos of numerous AGU talks on Vesta from this past week are available online here (three separate sessions). I saw just a few of them in person - mainly about the large south polar crater.
http://sites.agu.org/fallmeeting/scientifi...and-6-december/ -------------------- Steve [ my home page and planetary maps page ]
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Dec 11 2011, 05:45 PM
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#39
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Senior Member Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150 |
After long hiatus (related to safe mode event one week ago) the simulator is up again! Yesterday, several short engine burns put Dawn on a 209 km average height but, interestingly, now eccentricity is increasing due to Vesta gravitational field:
The yellow curve is my rough attempt to interpolate trend through a sinusoid with 4.3 hours period and increasing amplitude (8 km/day) - anyway, remember that simulator is based on a nominal orbit design, not real time data! [I would like to thank Dr Rayman for additional info through private communications!] -------------------- I always think before posting! - Marco -
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Dec 11 2011, 07:20 PM
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#40
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Junior Member Group: Members Posts: 22 Joined: 23-August 11 From: France Member No.: 6134 |
Thanks, dilo.
For the bump projection, a tri-axial ellipsoid 289x280x229 km (recommended values by NAIF) is used. So a spheroid (289x229) works fine. EDIT: correct wrong value: 229 instead of 219. |
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Dec 11 2011, 09:10 PM
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#41
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Founder Group: Chairman Posts: 14434 Joined: 8-February 04 Member No.: 1 |
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Dec 11 2011, 09:18 PM
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#42
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Member Group: Members Posts: 252 Joined: 5-May 05 From: Mississippi (USA) Member No.: 379 |
Videos of numerous AGU talks ( on Vesta ) from this past week are available online here As an interested amateur, the following AGU video appears to be a good summary of what has been discovered about Vesta so far. It is 2 hours long and I have only viewed 40% of it, but the quality has been very good up till now, and I understood most of it. It is HD and if you download it be prepared for a 900 MB file. Here is the link: U21B Dawn Explores Vesta http://vimeo.com/33317236 Note:This is not a link to the AGU page with the embedded player. It is a direct link to the hosting site VIMEO. Registered members can download file from here. AGU page: Sessions on Demand (No downloads) http://sites.agu.org/fallmeeting/scientifi...and-8-december/ Jack |
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Dec 13 2011, 11:32 PM
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#43
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Junior Member Group: Members Posts: 35 Joined: 28-September 05 From: Seattle, WA Member No.: 514 |
Now that Robert Gaskell's shape model of Vesta is available, I used it to create a movie comparing Vesta to two other Solar System bodies... For Celestia users, here's an add-on that replaces Celestia's default low-resolution Vesta model with the Gaskell model: http://www.shatters.net/~claurel/celestia/models/vesta.zip The model contains less than 50,000 triangles, so it should display well on any system. It uses a normal map to supply the extra detail from the original high-resolution shape model. --Chris |
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Dec 13 2011, 11:58 PM
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#44
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Junior Member Group: Members Posts: 22 Joined: 23-August 11 From: France Member No.: 6134 |
Thank you, I was just preparing a conversion for celestia but now i know that it's not necessary and it save my time
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Dec 14 2011, 01:43 AM
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#45
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Senior Member Group: Members Posts: 1592 Joined: 14-October 05 From: Vermont Member No.: 530 |
First (?) image from near LAMO?
http://dawn.jpl.nasa.gov/multimedia/dawn_o..._over_vesta.asp Taken from 230km. |
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