Wilmslow Astro

Astronomy from a Cheshire suburb

Lunar 100

The "Lunar 100" was described by Charles<Chuck> Wood in a Sky & Telescope article in the April 2004 edition. The Lunar 100 list of Lunar features attempts to show you a diverse range of objects that can be observed, they are not necessarily the most conspicuous or showy features. Chuck has attempted to arrange the objects in an order of easiest to the most difficult to observer. The table below describes each object and has links to images of the ones which I have managed to capture.

This is a brand new page as of 19th June 2006 and is still very much under construction.
I'm still coding the page and sorting existing images for posting, then I'll start an L100 imaging program.

L1-20    L21-40    L41-60    L61-80    L81-100

L100 Map

Back to top
LImage ListFeature NameSignificanceLat.
Diam.(km)Rükl Chart
11 2 3  MoonLarge satellite3,476
2 EarthshineTwice reflected sunlight
3 Mare/highland dichotomyTwo materials with distinct compositions
4 ApenninesImbrium basin rim18.9N3.7W7022
5 CopernicusArchetypal large complex crater9.7N20.1W9331
6 TychoLarge rayed crater with impact melts43.4S11.1W8564
71 Altai ScarpNectaris basin rim24.3S22.6E42557
81 Theophilus, Cyrillus, CatharinaCrater sequence illustrating stages of degradation13.2S24.0E46, 57
9 ClaviusLacks basin features in spite of its size58.8S14.1W22572
10 Mare CrisiumMare contained in large circular basin18.0N59.0E54026, 27, 37, 38
111 2 AristarchusVery bright crater with dark bands on its walls23.7N47.4W4018
12 ProclusOblique-impact rays16.1N46.8E2826
131 GassendiFloor-fractured crater17.6S40.1W10152
14 Sinus IridumVery large crater with missing rim45.0N32.0W26010
15 Straight WallBest example of a lunar fault21.8S7.8W11054
161 PetaviusCrater with domed & fractured floor25.1S60.4E17759
171 1 Schröter's ValleyGiant sinuous rille26.2N50.8W16818
181 Mare Serenitatis dark edgesDistinct mare areas with different compositions17.8N23.0EN/A24
19 Alpine ValleyLunar graben49.0N3.0E1654
20 PosidoniusFloor-fractured crater31.8N29.9E9514
Back to top
LImage ListFeature NameSignificanceLat.
Long. (°)Diam. (km)Rükl Chart
21 FracastoriusCrater with subsided & fractured floor21.5S33.2E12458
221 Aristarchus PlateauMysterious uplifted region mantled with pyroclastics26.0N51.0W15018
23 PicoIsolated Imbrium basin-ring fragment45.7N8.9W2511
24 Hyginus RilleRille containing rimless collapse pits7.4N7.8E22034
25 Messier & Messier AOblique ricochet-impact pair1.9S47.6E1148
26 Mare FrigorisArcuate mare of uncertain origin56.0N1.4E16002–6
27 ArchimedesLarge crater lacking central peak29.7N4.0W8312, 22
28 HipparchusFirst drawing of a single crater5.5S4.8E15044, 45
29 Aridaeus RilleLong, linear graben6.4N14.0E25034
30 SchillerPossible oblique impact51.9S39.0W18071
31 TaruntiusYoung floor-fractured crater5.6N46.5E5637
32 Arago Alpha & BetaVolcanic domes6.2N21.4E2635
33 Serpentine RidgeBasin inner-ring segment27.3N25.3E15524
34 Lacus MortisStrange crater with rille & ridge45.0N27.2E15214
35 Triesnecker RillesRille family4.3N4.6E21533
36 Grimaldi basinA small two-ring basin5.5S 68.3W44039
37 BaillyBarely discernible basin66.5S69.1W30371
38 Sabine & RitterPossible twin impacts1.7N19.7E3035
391 SchickardCrater floor with Orientale basin ejecta stripe44.3S55.3W22762
401 Janssen RilleRare example of a highland rille45.4S39.3E19067, 68
Back to top
LImage ListFeature NameSignificanceLat.
Diam. (km)Rükl Chart
41Bessel rayRay of uncertain origin near Bessel21.8N17.9EN/A24
42 Marius HillsComplex of volcanic domes & hills12.5N54.0W12528, 29
431 WargentinA crater filled to the rim with lava or ejecta49.6S60.2W8470
44 MerseniusDomed floor cut by secondary craters21.5S49.2W8451
45 MaurolycusRegion of saturation cratering42.0S14.0E11466
46 Regiomontanus central peakPossible volcanic peak28.0S0.6W12455
47 Alphonsus dark spotsDark-halo eruptions on crater floor13.7S3.2W11944
48 Cauchy regionFault, rilles, & domes10.5N38.0E13036
49 Gruithuisen Delta & GammaVolcanic domes formed with viscous lavas36.3N40.0W209
50 Cayley PlainsLight, smooth plains of uncertain origin4.0N15.1E1434
51 Davy crater chainResult of comet-fragment impacts11.1S6.6W5043
52 CrügerPossible volcanic caldera16.7S66.8W4550
53 LamontPossible buried basin4.4N23.7E10635
541 Hippalus RillesRilles concentric to Humorum basin24.5S29.0W24052, 53
55 BacoUnusually smooth crater floor & surrounding plains51.0S19.1E6974
56 Australe basinA partially flooded ancient basin49.8S84.5E88076
57 Reiner GammaConspicuous swirl & magnetic anomaly7.7N59.2W7028
581 Rheita ValleyBasin secondary-crater chain42.5S51.5E44568
59 Schiller-Zucchius basinBadly degraded overlooked basin56.0S45.0W33570, 71
60 Kies PiVolcanic dome26.9S24.2W4553
Back to top
LImage ListFeature NameSignificanceLat.
Diam. (km)Rükl Chart
61 Mösting ASimple crater close to center of lunar near side3.2S5.2W1343
62 RümkerLarge volcanic dome40.8N58.1W708
63 Imbrium sculptureBasin ejecta near & overlying Boscovich & Julius Caesar11.0N12.0E34
64 DescartesApollo 16 landing site; putative region of highland volcanism11.7S15.7E4845
65 Hortensius domesDome field north of Hortensius7.6N27.9W1030
66 Hadley RilleLava channel near Apollo 15 landing site25.0N3.0E22
67 Fra Mauro formationApollo 14 landing site on Imbrium ejecta3.6S17.5W42
68 Flamsteed PProposed young volcanic crater & Surveyor 1 landing site3.0S44.0W11240
69 Copernicus secondary cratersRays & craterlets near Pytheas19.6N19.1W420
70 Humboldtianum basinMulti-ring impact basin57.0N80.0E6507
71 Sulpicius Gallus dark mantleAsh eruptions northwest of crater19.6N11.6E1223
72 Atlas dark-halo cratersExplosive volcanic pits on the floor of Atlas46.7N44.4E8715
731 Smythii basinDifficult-to-observe basin scarp & mare2.0S87.0E74038, 49
74 Copernicus HDark-halo impact crater6.9N18.3W531
75 Ptolemaeus BSaucerlike depression on the floor of Ptolemaeus8.0S0.8W1644
76 W. BondLarge crater degraded by Imbrium ejecta65.3N3.7E1584
77 Sirsalis RilleProcellarum basin radial rilles15.7S61.7W42539, 50
78 Lambert RA buried "ghost" crater23.8N20.6W5420
79 Sinus AestuumEastern dark-mantle volcanic deposit12.0N3.5W9033
80 Orientale basinYoungest large impact basin19.0S95.0W93050
Back to top
LImage ListFeature NameSignificanceLat.
Diam. (km)Rükl Chart
81 Hesiodus AConcentric crater30.1S17.0W1554
82 LinnéSmall crater once thought to have disappeared27.7N11.8E2.423
83 Plato craterletsCrater pits at limits of detection51.6N9.4W1013, 4
84 PitatusCrater with concentric rilles29.8S13.5W9754
85 Langrenus raysAged ray system8.9S60.9E13249
861 Prinz RillesRille system near the crater Prinz27.0N43.0W4619
87 HumboldtCrater with central peaks & dark spots27.0S80.9E20760
88 PearyDifficult-to-observe polar crater88.6N33.0E744, II
89 Valentine DomeVolcanic dome30.5N10.1E3013
90 Armstrong, Aldrin & CollinsSmall craters near the Apollo 11 landing site1.3N23.7E335
91 De Gasparis RillesArea with many rilles25.9S50.7W3051
92 Gylden ValleyPart of the Imbrium radial sculpture5.1S0.7E4744
93 Dionysius raysUnusual & rare dark rays2.8N17.3E1835
94 DrygalskiLarge south-pole region crater79.3S84.9W16272, VI
95 Procellarum basinThe Moon's biggest basin?23.0N15.0W3200
96 Leibnitz MountainsRim of South Pole-Aitken basin85.0S30.0E73, V
97 Inghirami ValleyOrientale basin ejecta44.0S73.0W14061
98 Imbrium lava flowsMare lava-flow boundaries32.8N22.0W10
99 InaD-shaped young volcanic caldera18.6N5.3E322
100 Mare Marginis swirlsPossible magnetic field deposits18.5N88.0E27, III
Back to top
L4 Apennines
Imbrium basin rimL5 Copernicus
Archetypal large complex craterL6 Tycho
Large rayed crater with impact meltsL7 Altai Scarp
Nectaris basin rimL8 Theophilus, Cyrillus, Catharina
Crater sequence illustrating stages of degradationL9 Clavius
Lacks basin features in spite of its sizeL10 Mare Crisium
Mare contained in large circular basinL11 Aristarchus
Very bright crater with dark bands on its wallsL12 Proclus
Oblique-impact raysL13 Gassendi
Floor-fractured craterL14 Sinus Iridum
Very large crater with missing rimL15 Straight Wall
Best example of a lunar faultL16 Petavius
Crater with domed & fractured floorL17 Schröter's Valley
Giant sinuous rilleL18 Mare Serenitatis dark edges
Distinct mare areas with different compositionsL19 Alpine Valley
Lunar grabenL20 Posidonius
Floor-fractured craterL21 Fracastorius
Crater with subsided & fractured floorL22 Aristarchus Plateau
Mysterious uplifted region mantled with pyroclasticsL23 Pico
Isolated Imbrium basin-ring fragmentL24 Hyginus Rille
Rille containing rimless collapse pitsL25 Messier & Messier A
Oblique ricochet-impact pairL26 Mare Frigoris
Arcuate mare of uncertain originL27 Archimedes
Large crater lacking central peakL28 Hipparchus
First drawing of a single craterL29 Aridaeus Rille
Long, linear grabenL30 Schiller
Possible oblique impactL31 Taruntius
Young floor-fractured craterL32 Arago Alpha & Beta
Volcanic domesL33 Serpentine Ridge
Basin inner-ring segmentL34 Lacus Mortis
Strange crater with rille & ridgeL35 Triesnecker Rilles
Rille familyL36 Grimaldi basin
A small two-ring basinL37 Bailly
Barely discernible basinL38 Sabine & Ritter
Possible twin impactsL39 Schickard
Crater floor with Orientale basin ejecta stripeL40 Janssen Rille
Rare example of a highland rilleL41 Bessel ray
Ray of uncertain origin near BesselL42 Marius Hills
Complex of volcanic domes & hillsL43 Wargentin
A crater filled to the rim with lava or ejectaL44 Mersenius
Domed floor cut by secondary cratersL45 Maurolycus
Region of saturation crateringL46 Regiomontanus central peak
Possible volcanic peakL47 Alphonsus dark spots
Dark-halo eruptions on crater floorL48 Cauchy region
Fault, rilles, & domesL49 Gruithuisen Delta & Gamma
Volcanic domes formed with viscous lavasL50 Cayley Plains
Light, smooth plains of uncertain originL51 Davy crater chain
Result of comet-fragment impactsL52 Crüger
Possible volcanic calderaL53 Lamont
Possible buried basinL54 Hippalus Rilles
Rilles concentric to Humorum basinL55 Baco
Unusually smooth crater floor & surrounding plainsL56 Australe basin
A partially flooded ancient basinL57 Reiner Gamma
Conspicuous swirl & magnetic anomalyL58 Rheita Valley
Basin secondary-crater chainL59 Schiller-Zucchius basin
Badly degraded overlooked basinL60 Kies Pi
Volcanic domeL61 Mösting A
Simple crater close to center of lunar near sideL62 Rümker
Large volcanic domeL63 Imbrium sculpture
Basin ejecta near & overlying Boscovich & Julius CaesarL64 Descartes
Apollo 16 landing site; putative region of highland volcanismL65 Hortensius domes
Dome field north of HortensiusL66 Hadley Rille
Lava channel near Apollo 15 landing siteL67 Fra Mauro formation
Apollo 14 landing site on Imbrium ejectaL68 Flamsteed P
Proposed young volcanic crater & Surveyor 1 landing siteL69 Copernicus secondary craters
Rays & craterlets near PytheasL70 Humboldtianum basin
Multi-ring impact basinL71 Sulpicius Gallus dark mantle
Ash eruptions northwest of craterL72 Atlas dark-halo craters
Explosive volcanic pits on the floor of AtlasL73 Smythii basin
Difficult-to-observe basin scarp & mareL74 Copernicus H
Dark-halo impact craterL75 Ptolemaeus B
Saucerlike depression on the floor of PtolemaeusL76 W. Bond
Large crater degraded by Imbrium ejectaL77 Sirsalis Rille
Procellarum basin radial rillesL78 Lambert R
A buried 'ghost' craterL79 Sinus Aestuum
Eastern dark-mantle volcanic depositL80 Orientale basin
Youngest large impact basinL81 Hesiodus A
Concentric craterL82 Linné
Small crater once thought to have disappearedL83 Plato craterlets
Crater pits at limits of detectionL84 Pitatus
Crater with concentric rillesL85 Langrenus rays
Aged ray systemL86 Prinz Rilles
Rille system near the crater PrinzL87 Humboldt
Crater with central peaks & dark spotsL88 Peary
Difficult-to-observe polar craterL89 Valentine Dome
Volcanic domeL90 Armstrong, Aldrin & Collins
Small craters near the Apollo 11 landing siteL91 De Gasparis Rilles
Area with many rillesL92 Gylden Valley
Part of the Imbrium radial sculptureL93 Dionysius rays
Unusual & rare dark raysL94 Drygalski
Large south-pole region craterL95 Procellarum basin
The Moon's biggest basin?L96 Leibnitz Mountains
Rim of South Pole-Aitken basinL97 Inghirami Valley
Orientale basin ejectaL98 Imbrium lava flows
Mare lava-flow boundariesL99 Ina
D-shaped young volcanic calderaL100 Mare Marginis swirls
Possible magnetic field deposits