Dawn approaches Ceres, From opnav images to first orbit |
Dawn approaches Ceres, From opnav images to first orbit |
Apr 15 2015, 05:17 PM
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#751
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Member Group: Members Posts: 423 Joined: 13-November 14 From: Norway Member No.: 7310 |
Spot 1 is considerably bigger in the sense that it is a resolved feature, while spot 5 occupies less than one pixel at that resolution.
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Apr 15 2015, 07:11 PM
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#752
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Senior Member Group: Members Posts: 2106 Joined: 13-February 10 From: Ontario Member No.: 5221 |
Some minor news while waiting for the images: the Ceres model has been updated in the simulated view with the new info.
http://dawn.jpl.nasa.gov/mission/live_shots.asp Looks about halfway illuminated now.... |
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Apr 15 2015, 09:51 PM
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#753
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Member Group: Members Posts: 716 Joined: 3-January 08 Member No.: 3995 |
Trying to make sense of the recently released color map....
The area corresponding with the long-known Piazzi feature appears here to be a 'yellowish' region possibly surrounded by a 'frosty blue' 'halo': Same area in RC2 images: Without markings: I think this area will prove to be quite interesting once we get the hi-res images. |
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Apr 15 2015, 11:02 PM
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#754
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
One thing I noticed in the caption to this map (emphasis mine):
QUOTE Images taken using blue (440 nanometers), green (550 nanometers) and infrared (920 nanometers) spectral filters were combined to create the map. The filters were assigned to color channels in reverse order, compared to natural color; in other words, the short-wavelength blue images were assigned to the red color channel and the long-wavelength infrared images are assigned to the blue color channel.
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Apr 16 2015, 02:20 AM
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#755
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
and that false color map is the SAME!!! data from the other images from the feb25 first close approach
THE SAME ( the gray scale part is ) nothing really new for that bright spot now in a few days ........... |
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Apr 17 2015, 06:51 AM
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#756
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Member Group: Members Posts: 238 Joined: 15-January 13 Member No.: 6842 |
Any idea why the order of colours has been reversed?
Here they are in the conventional order by wavelength: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA Processing by M. Kakitsev Just a guess, but I suppose that the reddish areas is old, space-weathered surface, while the blue-green areas is freshly-exposed material. -------------------- Curiosity rover panoramas: http://www.facebook.com/CuriosityRoverPanoramas
My Photosynth panoramas: http://photosynth.net/userprofilepage.aspx...;content=Synths |
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Apr 19 2015, 12:29 PM
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#757
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Senior Member Group: Admin Posts: 3108 Joined: 21-December 05 From: Canberra, Australia Member No.: 615 |
ADMIN NOTE: A number of posts related to Dawn observations post the March 6th arrival have been moved to the 'first orbit' discussion. Please ONLY post information here if it is relevant to the 'approach' phase of Ceres.
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