Dawn approaches Ceres, From opnav images to first orbit |
Dawn approaches Ceres, From opnav images to first orbit |
Jan 12 2015, 12:10 AM
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Solar System Cartographer Group: Members Posts: 10226 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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Feb 13 2015, 09:31 PM
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Member Group: Members Posts: 656 Joined: 20-April 05 From: League City, Texas Member No.: 285 |
Exactly the point. There is a distinct line between the heavily cratered region at the bottom and the smoother terrain to the north -- seems to be a drop in the surface level (not steep enough to call a cliff) between the "southern highlands" and the "equatorial plains". True, we may be missing a heavily cratered region about the north pole due to orientation and lighting. A partial explanation may be that the topography is smoothed by viscous relaxation about the equatorial region, but the polar regions are cold enough to preserve the rougher topography -- but why the abrupt transition from one to the other?
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