Dawn approaches Ceres, From opnav images to first orbit |
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Dawn approaches Ceres, From opnav images to first orbit |
 Jan 12 2015, 12:10 AM
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#1
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Solar System Cartographer  Group: Members Posts: 10258 Joined: 5-April 05 From: Canada Member No.: 227  |
On Tuesday (two days from now, for visitors from the future), the first optical navigation image will be taken... hopefully we'll have it in our hands soon after that. So it's time for a new topic. Over the next few months we'll have progressively closer images and full orbit characterization sequences, no doubt including multispectral image sets.
A new world... This is a bit of reprocessing I have been doing with the Hubble images from a few years ago.
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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Jan 12 2015, 02:48 AM
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#2
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Member Group: Members Posts: 295 Joined: 2-March 04 From: Central California Member No.: 45 |
I very excited to see this little world better. Nice processing on those Hubble images though!
-------------------- Eric P / MizarKey
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Jan 12 2015, 08:22 AM
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#3
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 Senior Member Group: Members Posts: 1091 Joined: 19-February 05 From: Close to Meudon Observatory in France Member No.: 172 |
QUOTE (Phil Stooke @ Jan 12 2015, 01:10 AM)  A new world... This is a bit of reprocessing I have been doing with the Hubble images from a few years ago. Phil WOW, Phil : you are still the best ! Thanks to this VERY NICE processing of yours, I just realize how bright some craters are (very bright indeed)... and why the astronomers community is just drooling over the underlying layer of ice (and a possible ocean) on this small world. Thanks so much again ! 
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Jan 12 2015, 12:35 PM
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#4
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 Interplanetary Dumpster Diver Group: Admin Posts: 4405 Joined: 17-February 04 From: Powell, TN Member No.: 33 |
Beautiful! I've fooled with this dataset a little and not gotten anything worth showing out of it.
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Jan 12 2015, 05:59 PM
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#5
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Solar System Cartographer Group: Members Posts: 10258 Joined: 5-April 05 From: Canada Member No.: 227 |
This is a cylindrical map made from those images. Longitudes start at 0 at the left edge, following the mapping by Li et al. in Icarus in 2006. My registration is not very good, and the dark southern polar region must be an artifact, but it's something to play with as we start to get the early images.
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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Jan 13 2015, 12:46 PM
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#6
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 Member Group: Members Posts: 207 Joined: 6-March 07 From: houston, texas Member No.: 1828 |
Very Nice!
can i post it on my blog later today? -------------------- 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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Jan 13 2015, 12:57 PM
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#7
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 Member Group: Members Posts: 378 Joined: 21-April 05 From: Portugal Member No.: 347 |
Great map!
Besides the lighter patches I see one or two interesting dark ones. -------------------- _______________________
www.astrosurf.com/nunes |
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Jan 13 2015, 02:01 PM
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#8
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Solar System Cartographer Group: Members Posts: 10258 Joined: 5-April 05 From: Canada Member No.: 227 |
Hi Paul - by all means post it. It's not as nice as you suggest but it's a start! I look forward to its very rapid replacement with something better.
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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Jan 13 2015, 04:37 PM
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#9
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Member Group: Members Posts: 207 Joined: 6-March 07 From: houston, texas Member No.: 1828 |
I am most intrigued by the apparent 'bluing' near the poles. will be interested to see if that is real.
-------------------- 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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Jan 13 2015, 04:46 PM
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#10
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Solar System Cartographer Group: Members Posts: 10258 Joined: 5-April 05 From: Canada Member No.: 227 |
In the single images, it's bluer near the limb and terminator, and the composite leaves that blue near the poles but loses it where images overlap near the equator. I expect it's an artifact or a photometric effect, but there is a possibility of higher albedo (looking blue) near the poles as we see at Ganymede.
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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Jan 13 2015, 06:02 PM
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#11
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Member Group: Members Posts: 207 Joined: 6-March 07 From: houston, texas Member No.: 1828 |
true. but some of the images seem to show stronger 'blue' near the poles. wont know till we get there!
-------------------- 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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Jan 13 2015, 07:15 PM
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#12
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 Member Group: Members Posts: 808 Joined: 10-October 06 From: Maynard Mass USA Member No.: 1241 |
Dawn is supposed to take another Ceres image today -- release will most likely be .....? (soonish)
-------------------- CLA CLL
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Jan 14 2015, 12:12 AM
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#13
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Member Group: Members Posts: 207 Joined: 6-March 07 From: houston, texas Member No.: 1828 |
can't comment on pronunciation as my latin is rusty, but i do have a blog about the approach posted . . .
http://stereomoons.blogspot.com/2015/01/ye...-pluto-get.html
Attached thumbnail(s)
-------------------- 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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Jan 14 2015, 03:40 AM
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#14
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Newbie Group: Members Posts: 9 Joined: 7-December 14 Member No.: 7360 |
It's now the evening of the 13th. Is it safe to say that the Dawn team is looking at the 25 pixel image of Ceres as we speak?
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Jan 14 2015, 04:26 AM
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#15
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Senior Member Group: Members Posts: 1279 Joined: 25-November 04 Member No.: 114 |
The image that was taken Dec 1,2014 took 7 or 8 days to release.
We just have to wait. |
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