Difference between revisions of "January 20, 2011"
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<em>image by [mailto:astroclub.kiev.ua@gmail.com Павел Пресняков] (Pavel Presnyakov), Kiev Ukraine</em><br /> | <em>image by [mailto:astroclub.kiev.ua@gmail.com Павел Пресняков] (Pavel Presnyakov), Kiev Ukraine</em><br /> | ||
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| − | Have you ever observed Bailly? Its a big crater just on the western limb. It isn't very deep (maybe; there isn't a reliable modern measurement) for its original floor appears to be at least partially filled in, presumably with Orientale's ejecta. There is no evidence of a central peak, but it might not be unusual because at about 290 km diameter, Bailly is big enough to be a two-ring basin. Bill Hartmann and I thought it was 40 years ago, and Pavel's great image and the new overhead [ | + | Have you ever observed Bailly? Its a big crater just on the western limb. It isn't very deep (maybe; there isn't a reliable modern measurement) for its original floor appears to be at least partially filled in, presumably with Orientale's ejecta. There is no evidence of a central peak, but it might not be unusual because at about 290 km diameter, Bailly is big enough to be a two-ring basin. Bill Hartmann and I thought it was 40 years ago, and Pavel's great image and the new overhead [[January_18,_2011|view]] provided by the LRO-WAC global [http://the-moon.wikispaces.com/Bailly mosaic] continues to provide hints of the putative inner ring. The mosaic image shows very well an Orientale crater chain crossing the far floor of Bailly, and a ridge associated with the chain is nicely visible in Pavel's image, as is a linear crater chain on the crater rim. While the terminator is near the western limb take a look for an inner ring. <br /> |
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<em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br /> | <em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br /> | ||
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Rükl plate [http://the-moon.wikispaces.com/R%C3%BCkl+71 71]<br /> | Rükl plate [http://the-moon.wikispaces.com/R%C3%BCkl+71 71]<br /> | ||
Pavel's new [http://sfire.astroclub.kiev.ua/ website]<br /> | Pavel's new [http://sfire.astroclub.kiev.ua/ website]<br /> | ||
| + | <p><b>Yesterday's LPOD:</b> [[January 19, 2011|Solstice Red, Sort Of]] </p> | ||
| + | <p><b>Tomorrow's LPOD:</b> [[January 21, 2011|A Question of Paternity]] </p> | ||
<hr /> | <hr /> | ||
Revision as of 11:51, 7 February 2015
A Basin or Just a Big Crater?
image by Павел Пресняков (Pavel Presnyakov), Kiev Ukraine
Have you ever observed Bailly? Its a big crater just on the western limb. It isn't very deep (maybe; there isn't a reliable modern measurement) for its original floor appears to be at least partially filled in, presumably with Orientale's ejecta. There is no evidence of a central peak, but it might not be unusual because at about 290 km diameter, Bailly is big enough to be a two-ring basin. Bill Hartmann and I thought it was 40 years ago, and Pavel's great image and the new overhead view provided by the LRO-WAC global mosaic continues to provide hints of the putative inner ring. The mosaic image shows very well an Orientale crater chain crossing the far floor of Bailly, and a ridge associated with the chain is nicely visible in Pavel's image, as is a linear crater chain on the crater rim. While the terminator is near the western limb take a look for an inner ring.
Chuck Wood
Technical Details
11-11-08, 16:33 UT. 350 mm newtonian + barlow 5x Vac-135, b/w 1280x1024 500 in Registax 6 alpha
Related Links
Rükl plate 71
Pavel's new website
Yesterday's LPOD: Solstice Red, Sort Of
Tomorrow's LPOD: A Question of Paternity
