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3towers Observatory Lunar 100/Lunar Features

The Lunar 100 was created by Charles A. Wood who states: "The Lunar 100 list is an attempt to provide Moon lovers with something akin to what deep-sky observers enjoy with the Messier catalog: a selection of telescopic sights to ignite interest and enhance understanding. [It is]... a selection of the Moon&##39;s 100 most interesting regions, craters, basins, mountains, rilles, and domes."

Woods challenges "...observers to find and observe them all and, more important, to consider what each feature tells us about lunar and Earth history."

To find out more about the Lunar 100 see the Sky & Telescope web site at: http://skyandtelescope.com/observing/objects/moon/article_1199_1.asp.

The Lunar 100 features are arranged from the easiest to view to the most difficult. The Moon itself is L1. L2 is Earthshine, and L3 represents the dichotomy between the Lunar highlands and the Lunar Maria. While the Lunar 100 are concentrated all on the nearside of the Moon, they can not be seen in a single night or a single month. Some of them require special lighting conditions or phases of the Moon, and others, in addition, require very favorable librations of the Moon to bring them into view. The Lunar 100 is an observing list. However, the equipment at the 3towers Observatory was used to image the Lunar 100, mainly using the web cam techniques detailed.


Lunar Feature Lunar Age in days (rounded down) Thumbnail Image Comments
91. De Gasparis Rilles 11.6 days  
92. Gylden Valley 8 days The dark narrow "valley" running above center and North of the large crater Ptolemaeus touches on a flat poorly preserved crater Gylden.
92. Gylden Valley 9.3 days  
92. Gylden Valley 9.5 days  
92. Gylden Valley 21 days The dark narrow "valley" running above center and North of the large crater Ptolemaeus touches on a flat poorly preserved crater Gylden.
93. Dionysius Rays 6.05 days

 

 There are unusual dark rays around the crater Dionysius

 

The craters are labeled in this image
93. Dionysius Rays 8 days Mare Tranquillitatis is in the upper right hand corner. Sabine and Ritter are the paired craters near the bottom of Mare Tranquillitatis. To their West is the bright crater Dionysius. Around it are unusual dark rays.
93. Dionysius Rays Full Moon (14.7 days) Dionysius is one of the brightest craters on the Moon.  This is particularly evident at Full Moon.
94. Drygalski 10 days Drygalski is the large flat shadowed crater at the very bottom of the image.
94. Drygalski 13 days Drygalski is the large flat shadowed crater at the very bottom of the image.
94. Drygalski 13 days Drygalski is the large flat shadowed crater at the very bottom of the image.
94. Drygalski 13.1 days

 

 

The various craters in this image have been labeled: CL-Clavius; BL-Blancanus; KL-Klaproth; C-Casatus; D-Drygalski; N-Newton; S-Short; M-Moretus.

94. Drygalski 21.7 days  
95. Procellarum Basin      
96. Leibnitz Mountains 8 days Scott is the large crater at the bottom of the Moon with a small crater on its Southern wall. Demonax is the large crater East of Scott. South of Scott are the Leibnitz Mountains.
97. Inghirami Valley    
98. Imbrium basin at Full Moon 14.7 days  
98. Imbrium lava flows 21 days  
99. Ina Caldera 7.6 days  
100. Mare Marginis swirls 5 days Mare Marginis lies along the right edge of the image at the Eastern portion of near side of the Moon.
100.  Mare Marginis swirls 5.6 days This montage shows the Eastern limb of the Moon.
100.  Mare Marginis swirls 5.6 days MC = Mare Crisium; Con = Condorcet; Fi = Firmicus; L = Langrenus.
100.  Mare Marginis swirls 10.9 days