Left Navigation

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 Moons 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 Features|Lunar 100|Moon Halos|Lunar Webcam Imaging|Lunar Eclipses

Lunar Feature Lunar Age in days (rounded down) Thumbnail Image Comments
91. De Gasparis Rilles 11.6 days Mersenius  
92. Gylden Valley 9.3 days Glyden Valley 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


Dionysius Rays

There are unusual dark rays around the crater Dionysius




The craters are labeled in this image.

93. Dionysius Rays Full Moon (14.7 days) Dionysius Rays Dionysius is one of the brightest craters on the Moon.  This is particularly evident at Full Moon.
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 Drygalski  
95. Procellarum Basin      
96. Leibnitz Mountains      
97. Inghirami Valley   Schickard  
98. Imbrium basin at Full Moon 14.7 days Imbrium Basin at Full Moon  
98. Imbrium lava flows 21 days Imbrium Lava flows  
99. Ina Caldera 7.6 days Ina Caldera  
100.  Mare Marginis swirls 5.6 days Montage of the Eastern Limb of the Moon This montage shows the Eastern limb of the Moon.
100.  Mare Marginis swirls 5.6 days Montage of the Eastern Limb of the Moon MC = Mare Crisium; Con = Condorcet; Fi = Firmicus; L = Langrenus.
100.  Mare Marginis swirls 10.9 days Mare Marginalis