Lunar 100

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.

Click on the image thumbnails for the full size image. Full image details will be added to the table at a later date. Many of the pictures of the higer numbered items don't show the actual item just the general area!  For other "Lunar 100" sites try this list

L Image Feature Name Significance Lat. (°) Long. (°) Diam. (km) Rükl Chart S&T Issue
1 moon_021018.jpg (68697 bytes) Moon Large satellite 3,476
2 Earthshine Twice reflected sunlight May 2005
3 Mare/highland dichotomy Two materials with distinct compositions May 2005
4 L4_Apennines_041203.jpg (100505 bytes) Apennines Imbrium basin rim 18.9N 3.7W 70 22 Feb 2005
5 L05_040330.jpg (34025 bytes) Copernicus Archetypal large complex crater 9.7N 20.1W 93 31 Jul 2004
Jan 2006
6 L06_Tycho_041203.jpg (75207 bytes) Tycho Large rayed crater with impact melts 43.4S 11.1W 85 64 Jan 2006
7 L07_040525.jpg (42482 bytes) Altai Scarp Nectaris basin rim 24.3S 22.6E 425 57 Jun 2004
8 L08_040524.jpg (58334 bytes) Theophilus, Cyrillus, Catharina Crater sequence illustrating stages of degradation 13.2S 24.0E 46, 57 Oct 2004
9 L09_clavius_041203.jpg (79749 bytes) Clavius Lacks basin features in spite of its size 58.8S 14.1W 225 72 April 2005
10 L10_040523.jpg (38977 bytes) Mare Crisium Mare contained in large circular basin 18.0N 59.0E 540 26, 27, 37, 38
11 L17_040501.jpg (19799 bytes) Aristarchus Very bright crater with dark bands on its walls 23.7N 47.4W 40 18 March 2005
12 Proclus Oblique-impact rays 16.1N 46.8E 28 26
13 Gassendi Floor-fractured crater 17.6S 40.1W 101 52 Dec 2004
14 Sinus Iridum Very large crater with missing rim 45.0N 32.0W 260 10
15 L15_040329.jpg (51873 bytes) Straight Wall Best example of a lunar fault 21.8S 7.8W 110 54 Dec 2005
16 L16_040523.jpg (58580 bytes) Petavius Crater with domed & fractured floor 25.1S 60.4E 177 59 Dec 2004
17 L17_040501.jpg (19799 bytes) Schröter's Valley Giant sinuous rille 26.2N 50.8W 168 18 March 2005
18 Mare Serenitatis dark edges Distinct mare areas with different compositions 17.8N 23.0E N/A 24
19 L19_040329.jpg (38226 bytes) Alpine Valley Lunar graben 49.0N 3.0E 165 4
20 L20_040524.jpg (37003 bytes) Posidonius Floor-fractured crater 31.8N 29.9E 95 14 Dec 2004
21 L21_040524.jpg (44423 bytes) Fracastorius Crater with subsided & fractured floor 21.5S 33.2E 124 58
22 L17_040501.jpg (19799 bytes) Aristarchus Plateau Mysterious uplifted region mantled with pyroclastics 26.0N 51.0W 150 18 March 2005
23 Pico Isolated Imbrium basin-ring fragment 45.7N 8.9W 25 11 Feb 2005
24 Hyginus Rille Rille containing rimless collapse pits 7.4N 7.8E 220 34
25 L25_040523.jpg (45500 bytes) Messier & Messier A Oblique ricochet-impact pair 1.9S 47.6E 11 48 Jan 2006
26 L26_040329.jpg (38781 bytes) Mare Frigoris Arcuate mare of uncertain origin 56.0N 1.4E 1600 2–6 Sep 2005
27 Archimedes Large crater lacking central peak 29.7N 4.0W 83 12, 22 Nov 2004
28 Hipparchus First drawing of a single crater 5.5S 4.8E 150 44, 45
29 L29_040128.jpg (28266 bytes) Aridaeus Rille Long, linear graben 6.4N 14.0E 250 34 Oct 2005
30 Schiller Possible oblique impact 51.9S 39.0W 180 71
31 L31_040523.jpg (55629 bytes) Taruntius Young floor-fractured crater 5.6N 46.5E 56 37
32 Arago Alpha & Beta Volcanic domes 6.2N 21.4E 26 35
33 L33_040524.jpg (30160 bytes) Serpentine Ridge Basin inner-ring segment 27.3N 25.3E 155 24
34 L34_040128.jpg (36714 bytes)

L34_040524.jpg (29977 bytes)

Lacus Mortis Strange crater with rille & ridge 45.0N 27.2E 152 14 Dec 2005De
35 L35_030112.jpg (61895 bytes) Triesnecker Rilles Rille family 4.3N 4.6E 215 33
36 Grimaldi basin A small two-ring basin 5.5S 68.3W 440 39 April 2005
37 L37_Bailly_041203.jpg (59324 bytes) Bailly Barely discernible basin 66.5S 69.1W 303 71 April 2005
38 Sabine & Ritter Possible twin impacts 1.7N 19.7E 30 35
39 Schickard Crater floor with Orientale basin ejecta stripe 44.3S 55.3W 227 62
40 L40_040523.jpg (57951 bytes) Janssen Rille Rare example of a highland rille 45.4S 39.3E 190 67, 68
41 Bessel ray Ray of uncertain origin near Bessel 21.8N 17.9E N/A 24
42 Marius Hills Complex of volcanic domes & hills 12.5N 54.0W 125 28, 29
43 Wargentin A crater filled to the rim with lava or ejecta 49.6S 60.2W 84 70
44 Mersenius Domed floor cut by secondary craters 21.5S 49.2W 84 51
45 L45_040128.jpg (37912 bytes) Maurolycus Region of saturation cratering 42.0S 14.0E 114 66
46 L46_040329.jpg (49739 bytes) Regiomontanus central peak Possible volcanic peak 28.0S 0.6W 124 55
47 Alphonsus dark spots Dark-halo eruptions on crater floor 13.7S 3.2W 119 44 Aug 2005
48 L48_040524.jpg (27462 bytes) Cauchy region Fault, rilles, & domes 10.5N 38.0E 130 36 Dec 2005
49 Gruithuisen Delta & Gamma Volcanic domes formed with viscous lavas 36.3N 40.0W 20 9
50 Cayley Plains Light, smooth plains of uncertain origin 4.0N 15.1E 14 34 March 2006
51 L51_040329.jpg (43993 bytes) Davy crater chain Result of comet-fragment impacts 11.1S 6.6W 50 43
52 Crüger Possible volcanic caldera 16.7S 66.8W 45 50
53 Lamont Possible buried basin 4.4N 23.7E 106 35
54 Hippalus Rilles Rilles concentric to Humorum basin 24.5S 29.0W 240 52, 53
55 L55_040525.jpg (33656 bytes) Baco Unusually smooth crater floor & surrounding plains 51.0S 19.1E 69 74 March 2006
56 Australe basin A partially flooded ancient basin 49.8S 84.5E 880 76
57 Reiner Gamma Conspicuous swirl & magnetic anomaly 7.7N 59.2W 70 28
58 L58_040523.jpg (62986 bytes) Rheita Valley Basin secondary-crater chain 42.5S 51.5E 445 68 Jun 2004
59 Schiller-Zucchius basin Badly degraded overlooked basin 56.0S 45.0W 335 70, 71 April 2005
60 Kies Pi Volcanic dome 26.9S 24.2W 45 53 Jun 2005
61 Mösting A Simple crater close to center of lunar near side 3.2S 5.2W 13 43 Jul 2004
62 Rümker Large volcanic dome 40.8N 58.1W 70 8
63 Imbrium sculpture Basin ejecta near & overlying Boscovich & Julius Caesar 11.0N 12.0E 34
64 L64_040525.jpg (37331 bytes) Descartes Apollo 16 landing site; putative region of highland volcanism 11.7S 15.7E 48 45
65 Hortensius domes Dome field north of Hortensius 7.6N 27.9W 10 30 Jun 2005
66 hadley_f10_040229.jpg (19413 bytes) Hadley Rille Lava channel near Apollo 15 landing site 25.0N 3.0E 22 Sep 2004
67 Fra Mauro formation Apollo 14 landing site on Imbrium ejecta 3.6S 17.5W 42
68 L68_040501.jpg (24673 bytes) Flamsteed P Proposed young volcanic crater & Surveyor 1 landing site 3.0S 44.0W 112 40 Nov 2004
69 Copernicus secondary craters Rays & craterlets near Pytheas 19.6N 19.1W 4 20
70 Humboldtianum basin Multi-ring impact basin 57.0N 80.0E 650 7
71 Sulpicius Gallus dark mantle Ash eruptions northwest of crater 19.6N 11.6E 12 23 Aug 2005
72 L72_040523.jpg (68371 bytes) Atlas dark-halo craters Explosive volcanic pits on the floor of Atlas 46.7N 44.4E 87 15
73 Smythii basin Difficult-to-observe basin scarp & mare 2.0S 87.0E 740 38, 49 Nov 2005
74 Copernicus H Dark-halo impact crater 6.9N 18.3W 5 31
75 L75_040329.jpg (49637 bytes) Ptolemaeus B Saucerlike depression on the floor of Ptolemaeus 8.0S 0.8W 16 44
76 W. Bond Large crater degraded by Imbrium ejecta 65.3N 3.7E 158 4
77 Sirsalis Rille Procellarum basin radial rilles 15.7S 61.7W 425 39, 50 Oct 2005
78 Lambert R A buried "ghost" crater 23.8N 20.6W 54 20 Nov 2004
79 Sinus Aestuum Eastern dark-mantle volcanic deposit 12.0N 3.5W 90 33 Aug 2005
80 L80_041203_orientale_planetwarp.jpg (10751 bytes) Orientale basin Youngest large impact basin 19.0S 95.0W 930 50 Aug 2004
Jan 2005
81 Hesiodus A Concentric crater 30.1S 17.0W 15 54
82 Linné Small crater once thought to have disappeared 27.7N 11.8E 2.4 23
83 L83f20_050319.jpg (50568 bytes) Plato craterlets Crater pits at limits of detection 51.6N 9.4W 101 3, 4
84 Pitatus Crater with concentric rilles 29.8S 13.5W 97 54
85 L85_040523.jpg (56375 bytes) Langrenus rays Aged ray system 8.9S 60.9E 132 49
86 L17_040501.jpg (19799 bytes) Prinz Rilles Rille system near the crater Prinz 27.0N 43.0W 46 19 Sep 2004
87 Humboldt Crater with central peaks & dark spots 27.0S 80.9E 207 60
88 Peary Difficult-to-observe polar crater 88.6N 33.0E 74 4, II July 2005
89 L89_ValentineDome_041203.jpg (27198 bytes) Valentine Dome Volcanic dome 30.5N 10.1E 30 13
90 Armstrong, Aldrin & Collins Small craters near the Apollo 11 landing site 1.3N 23.7E 3 35
91 De Gasparis Rilles Area with many rilles 25.9S 50.7W 30 51
92 Gylden Valley Part of the Imbrium radial sculpture 5.1S 0.7E 47 44
93 Dionysius rays Unusual & rare dark rays 2.8N 17.3E 18 35
94 L94_Drygalski_041203.jpg (78353 bytes) Drygalski Large south-pole region crater 79.3S 84.9W 162 72, VI July 2005
95 Procellarum basin The Moon's biggest basin? 23.0N 15.0W 3200 Sep 2005
96 L96_Leibnitz_051217.jpg (55726 bytes) Leibnitz Mountains Rim of South Pole-Aitken basin 85.0S 30.0E 73, V July 2005
97 Inghirami Valley Orientale basin ejecta 44.0S 73.0W 140 61 Jan 2005
98 Imbrium lava flows Mare lava-flow boundaries 32.8N 22.0W 10 Aug 2004
99 L99_030112.jpg (63400 bytes) Ina D-shaped young volcanic caldera 18.6N 5.3E 3 22
100 Mare Marginis swirls Possible magnetic field deposits 18.5N 88.0E 27, III Nov 2005
 

Other Lunar 100 observation sites

http://www.salzgeber.at/astro/moon/L100.html

http://www.cuckney.pwp.blueyonder.co.uk/astronmy/Lunar100.htm

http://decaturastronomy.com/lunarbest.htm

http://www.shoestringastronomy.com/lunar/lunar100.htm

http://www.astronomer.me.uk/logs/by-l100/

Lunar 100 Observing Club http://www.rtpnet.org/~rac/obsprograms/Lunar%20100%20List_1.2.pdf

Observing log sheets http://www.eastvalleyastronomy.org/downloads/OTL100.pdf

Key Lunar imaging links

http://www.lpod.org

http://www.astrosurf.com/cidadao/moon.htm

Hitchhiker's Guide to the Moon

The Full Moon Atlas

Thierry Legault


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