Ash Observatory Lunar 100 1-50

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CURRENT MOON

moon phases

The "Lunar 100" was described by Sky & Telescope in their April 2004 article by Charles Wood. The objects are arranged in order from the easiest to the most difficult to view. The table below the map describes each object and has image links to the ones which I have observed.

Lunar 100 Log      PDF version

Click image for full size

L
Feature Name
Significance
Latitude Deg's
Longitude Deg's
Diameter (km)
Rükl Chart
1
Moon
Large satellite
-
-
3,476
-
2
Earthshine
Twice reflected sunlight
-
-
-
-
 
3
Mare/highland dichotomy
Two material with distict compositions
-
-
-

 
-

4
Apennines
Imbrium basin rim
18.9N
3.7W
70

 
22

5
Copernicus
Archetypal large complex crater
9.7N
20.1W
93

 
31

6
Tycho
Large rayed crater with impact melts
43.4S
11.1W
85

 
64

 
7
Altai Scarp
Nectaris basin rim
24.3S
22.6E
425

 
57

8
Theophilus, Cyrilus, Catharina
Crater sequence illustrating stages of degradation
13.2S
24.0E
-

 
46, 57

9
Clavius
Lacks basin features in spite of its size
58.8S
14.1W
225

 
72

10
Mare Crisium
Mare contained in large circular basin
18.0N
59.0E
540

 
26, 27, 37, 38

11
Aristarchus
Very bright crater with dark bands on it
23.7N
47.4W
40

 
18

12
Proclus
Oblique-impact rays
16.1N
46.8E
28

 
26

13
Gassendi
Floor-fractured crater
17.6S
40.1W
101

 
52

14
Sinus Iridum
Very large crater with missing rim
45.0N
32.0W
260

 
10

15
Straight Wall
Best example of a lunar fault
21.8S
7.8W
110

 
54

16
Petavius
Crater with domed & fractured floor
25.1S
60.4E
177

 
59

17
Schroters Valley
Gaint sinuous rille
26.2N
50.8W
168

 
18

18
Mare Serenitatis Dark Edges
Distinct mare areas with different compositions
17.8N
23.0E
N/A

 
24

19
Alpine Valley
Lunar garben
49.0N
3.0E
165

 
4

 

20

Posidonius

Floor-fractured crater

31.8N

29.9E

95

 
14

 

21

Fracastirius

Crater with subsided & fractured floor

21.5S

33.2E

124

 
58

22

Aristarchus Plateau

Mysterious uplifted mantled with pyrolastics

26.0N

51.0W