New map of Phobos |
New map of Phobos |
Mar 10 2010, 10:25 PM
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#1
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Solar System Cartographer Group: Members Posts: 10229 Joined: 5-April 05 From: Canada Member No.: 227 |
I'm starting a thread here in Mars Express for a new map of Phobos, because most of it will be based on MEX images.
This is the first section. It's the north pole, centred on the pole, out to 50 degrees north at the edge, in azimuthal equidistant projection (i.e. the parallels of latitude are equally spaced, unlike in a stereographic projection where they would get further apart away from the pole). This image is made of Viking, Mars Express and MRO images. Below it I show what the previous best map looked like, much more compressed to save space here. That is just Viking data, compiled by Damon Simonelli et al. at Cornell in the 1990s. The actual mapping is done at twice this scale. 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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Apr 17 2010, 03:18 AM
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#2
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Junior Member Group: Members Posts: 22 Joined: 6-March 10 From: London, Ontario, CANADA Member No.: 5247 |
Great stuff, Phil!
Hmmm. Not sure about eroded crater chains. Some grooves appear to be long furrows with no pits at all; other grooves are decorated with overlapping crater-like pits. There are also linear associations of craterlike pits that could be interpreted as crater chains ...but to my eye the pits are too evenly spaced. Maybe there is a real crater chain in there, but I'd side with interpreting these all as having some other common formation mechanism. What process(es) would make these groove and linear pit features on Phobos? -pjam -------------------- "We absolutely must leave room for doubt or there is no progress and there is no learning." -Richard P. Feynman
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