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LAMO, aka Low Altitude Mapping Orbit
stevesliva
post Dec 8 2011, 06:08 AM
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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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claurel
post Dec 9 2011, 07:38 PM
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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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ElkGroveDan
post Dec 9 2011, 07:51 PM
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Beautiful. Thanks for sharing.


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If Occam had heard my theory, things would be very different now.
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Sarunia
post Dec 10 2011, 11:04 PM
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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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Phil Stooke
post Dec 11 2011, 02:55 AM
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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

Attached Image


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Bill Harris
post Dec 11 2011, 07:23 AM
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And Nice! ^2, Phil. You can see a lot of history there.

--Bill


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dilo
post Dec 11 2011, 08:34 AM
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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...)


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scalbers
post Dec 11 2011, 04:47 PM
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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/


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dilo
post Dec 11 2011, 05:45 PM
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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:
Attached Image

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!]


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Sarunia
post Dec 11 2011, 07:20 PM
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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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djellison
post Dec 11 2011, 09:10 PM
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Did my own conversion from the greyscale map into something a bit more funky smile.gif
Attached thumbnail(s)
Attached Image
 
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stewjack
post Dec 11 2011, 09:18 PM
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QUOTE (scalbers @ Dec 11 2011, 12:47 PM) *
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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claurel
post Dec 13 2011, 11:32 PM
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QUOTE (claurel @ Dec 9 2011, 11:38 AM) *
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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Sarunia
post Dec 13 2011, 11:58 PM
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Thank you, I was just preparing a conversion for celestia but now i know that it's not necessary and it save my time smile.gif
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stevesliva
post Dec 14 2011, 01:43 AM
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First (?) image from near LAMO?
http://dawn.jpl.nasa.gov/multimedia/dawn_o..._over_vesta.asp

Taken from 230km.
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