Difference between revisions of "September 12, 2014"
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<em>image by [mailto:claude.navarro_toulouse@orange.fr Claude Navarro], Toulouse (France)</em><br /> | <em>image by [mailto:claude.navarro_toulouse@orange.fr Claude Navarro], Toulouse (France)</em><br /> | ||
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| − | Fecunditatis is a poor cousin to Crisium and Nectaris, two nearby basins with dramatic surrounding rims. Fecunditatis is definitely a mare, but the evidence that the lava fills an impact basin is weak. There is no significant rim anywhere around the mare, it is not a topographic depression, and its shape isn't even round. The strongest evidence that a basin might lurk somewhere under the lavas is the occurrence of two semi-circular mare ridges - [http://lpod. | + | Fecunditatis is a poor cousin to Crisium and Nectaris, two nearby basins with dramatic surrounding rims. Fecunditatis is definitely a mare, but the evidence that the lava fills an impact basin is weak. There is no significant rim anywhere around the mare, it is not a topographic depression, and its shape isn't even round. The strongest evidence that a basin might lurk somewhere under the lavas is the occurrence of two semi-circular mare ridges - [http://www2.lpod.org/wiki/November_24,_2007 Geikie and Andrusov-Mawson] - that could conceivably mark inner basin rings. None-the-less, there are numerous intriguing features that Claude's excellent mosaic captures. Of course, the most unique feature is the Moon's most bizarre crater pair- Messier and Messier A (previously Pickering) - which are clearly depicted, including the extra lip on the west side of A. Near the western end of its train-track rays are a [http://www.lpod.org/archive/LPOD-2004-10-11.htm crater-chain rille, other short rilles, a fault, and a dark pyroclastic deposit]. Nearby to the north is Taruntius, one of the few floor-fractured craters young enough to retain remnants of its crater rays. The entire mare surface is criss-crossed by [http://www.lpod.org/archive/archive/2004/04/LPOD-2004-04-16.htm rays] whose originating craters are not always obvious. Just below Langrenus is a very large impact melt deposit that I don't recall ever noticing before. It fills a degraded crater that even has a designations, [http://bit.ly/1rQiv4C Langrenus P]. At the bottom of the image is [http://www2.lpod.org/wiki/January_31,_2013 Petavius B], a crater whose bright rays reveal that it was formed by oblique impact with the projectile coming from the north. Look carefully around this marvelous image at secondary crater chains, a concentric crater, and another one that almost is. Happy exploring.<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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<strong>Related Links</strong><br /> | <strong>Related Links</strong><br /> | ||
| − | <em>[ | + | <em>[[21st Century Atlas of the Moon|21st Century Atlas]]</em> charts 3 and B4.<br /> |
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<p><b>Yesterday's LPOD:</b> [[September 11, 2014|Routine Maintenance]] </p> | <p><b>Yesterday's LPOD:</b> [[September 11, 2014|Routine Maintenance]] </p> | ||
Latest revision as of 08:36, 28 October 2018
A Mare with Benefits
image by Claude Navarro, Toulouse (France)
Fecunditatis is a poor cousin to Crisium and Nectaris, two nearby basins with dramatic surrounding rims. Fecunditatis is definitely a mare, but the evidence that the lava fills an impact basin is weak. There is no significant rim anywhere around the mare, it is not a topographic depression, and its shape isn't even round. The strongest evidence that a basin might lurk somewhere under the lavas is the occurrence of two semi-circular mare ridges - Geikie and Andrusov-Mawson - that could conceivably mark inner basin rings. None-the-less, there are numerous intriguing features that Claude's excellent mosaic captures. Of course, the most unique feature is the Moon's most bizarre crater pair- Messier and Messier A (previously Pickering) - which are clearly depicted, including the extra lip on the west side of A. Near the western end of its train-track rays are a crater-chain rille, other short rilles, a fault, and a dark pyroclastic deposit. Nearby to the north is Taruntius, one of the few floor-fractured craters young enough to retain remnants of its crater rays. The entire mare surface is criss-crossed by rays whose originating craters are not always obvious. Just below Langrenus is a very large impact melt deposit that I don't recall ever noticing before. It fills a degraded crater that even has a designations, Langrenus P. At the bottom of the image is Petavius B, a crater whose bright rays reveal that it was formed by oblique impact with the projectile coming from the north. Look carefully around this marvelous image at secondary crater chains, a concentric crater, and another one that almost is. Happy exploring.
Chuck Wood
Technical Details
Sept/11/2014, 03H30 UT. C14 + Basler 1300 + IR pass 685. 6 videos processed with AS2! (200 images stacked from 2000, for each video), wavelets with Registax 6 and mosaïc with Photoshop.
Related Links
21st Century Atlas charts 3 and B4.
Yesterday's LPOD: Routine Maintenance
Tomorrow's LPOD: Two Manifestations of Volcanism
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