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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 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
41. Bessel Ray 9.3 days Bessel Ray Bessel is the crater sitting in the middle of the ray.  The crater at the South edge of Mare Serenitatis is Menelaus.
41. Bessel Ray 9.7 days Bessel Ray  
41. Bessel Ray 12 days Bessel Ray  
41. Bessel Ray 12.3 days Bessel Ray  
42. Marius Hills 12.33 days Marius Hills  
42. Marius Hills 25.7  days Marius Hills Marius Hills are evident just to the North of the crater Marius.
43. Wargentin 13 days Wargentin The large crater left of center is Schickard. Just South of it is the lava filled crater Wargentin.
43. Wargentin 13.1 days Wargentin  
43. Wargentin 13.33 days Wargentin  
43. Wargentin 25.7 days Wargentin The large crater is Schickard. Just South of it is the lava filled crater Wargentin.
44. Mersenius 11.6 days Mersenius Mersenius is the large crater just West of Mare Humorum.
44. Mersenius 12.3 days Mersenius  
44. Mersenius 12.33 days Mersenius  
44. Mersenius 25.7 days Mersenius  
45. Maurolycus 6.7 days Marolycus  
45. Maurolycus 7 days Maurolycus Maurolycus lies just left of center. West of it in shadow is the complex crater Stofler with Faraday overlying its Southwest rim.
45. Maurolycus 8 days Maurolycus Maurolycus lies just left of center. West of it is the complex crater Stofler with Faraday overlying its Southwest rim.
46. Regiomontanus Central Peak 9.3 days Regiomontanus Regiomontanus is the flat crater below and to the right of center having a possible central volcano peak. Purbach is the large crater bordering on the Northern edge of Regiomontanus.  Notice the Straight Wall in the upper left hand corner.  Deslandres is the large flat crater bottom center. 
47. Alphonsus Dark Spots 8 days Alphonsus dark spots Alphonsus is the crater below center with a central peak. Above Alphonsus is the large crater Ptolemaeus with a small inner crater.
47. Alphonsus Dark Spots 9.3 days Alphonsus dark spots  
47. Alphonsus Dark Spots 9.5 days Alphonsus dark spots  
47. Alphonsus Dark Spots 21.7 days Alphonsus dark spots  
48. Cauchy Region 5.7 days Cauchy Region  
49. Gruithuisen Delta & Gamma 11.7 days Gruithuisen Delta and Gamma Gamma and Delta are the two rounded mounds close to each other near bottom center of the image. The prominent crater North and West of them is Mairan. Gruithuisen is the small crater directly South of Gamma and Delta.
49. Gruithuisen Delta & Gamma 12 days Gruithuisen Delta and Gamma  
49. Gruithuisen Delta & Gamma 12.3 days Gruithuisen Delta and Gamma  
49. Gruithuisen Delta & Gamma 13 days Gruithuisen Delta and Gamma  
49. Gruithuisen Delta & Gamma 22 days Gruithuisen Delta and Gamma  
50. Cayley Plains 6.7 days Cayley Plains The large flat crater filled with lava is Julius Caesar. Below it runs the Ariadaeus Rille and below that is the Cayley Plains. Mare Tranquillitatis lies along the right hand side.
50. Cayley Plains 8 days Cayley Plains The large flat crater filled with lava is Julius Caesar. Below it runs the Ariadaeus Rille and below that is the Cayley Plains. The Hyginus Rille runs to the West of the Ariadaeus Rille. Mare Vaporum lies along the left hand side and Mare Tranquillitatis along the right hand side.