ASE Lunar 100 Projectmark2021-11-08T14:50:46+00:00

ASE Lunar 100 Project

This is our attempt to image as many of the Lunar 100 objects as we can. It is a list of one hundred of the most interesting features to observe on the Moon. The list was first described by Charles A. Wood in the article The Lunar 100 in Sky & Telescope magazine, April 2004. They are arranged in ascending order of observational difficulty. We start populating it March 2021. 63/100

Lunar 100 list (PDF) » | Lunar 100 Notes (PDF) »

ASE Caldwell Project » ASE Messier Project »

Lunar 100 map, Sky & Telescope

L1 Moon Large Satellite (Will Joy)...

L1 Moon

L2 Earthshine Twice reflected sunlight (Ramsay McIver)...

L2 Earthshine

L5 Copernicus Archetypal large complex crater (Mark Phillips)...

L5 Copernicus

L6 Tycho Large rayed crater with impact melts (Mark Phillips)...

L6 Tycho

L7 Altai Scarp Nectaris basin rim (Radim Stano)...

L7 Altai Scarp

L8 Theophilus, Cyrillus, Catharina Crater sequence illustrating stages of degradation (Mark Phillips)...

L8 Theophilus, Cyrillus, Catharina

L9 Clavius Lacks basin features in spite of its size (Mike McGovern)...

L9 Clavius

L10 Mare Crisium - Mare contained in large circular basin (Mike McGovern)...

L10 Mare Crisium

L11 Aristarchus Very bright crater with dark bands on its walls (Mark Phillips)...

L11 Aristarchus

L12 Proclus - Oblique-impact rays (Mike McGovern)...

L12 Proclus

L13 Gassendi Floor-fractured crater (Mark Phillips)...

L13 Gassendi

L14 Sinus Iridum Very large crater with missing rim (Mike McGovern)...

L14 Sinus Iridum

L15 Straight Wall Best example of a lunar fault (Mike McGovern)...

L15 Straight Wall

L16 Petavius Crater with domed and fractured floor (Mike McGovern)...

L16 Petavius

L17 Schröter's Valley Giant sinuous rille (Mark Phillips)...

L17 Schröter’s Valley

L18 Mare Serenitatis dark edges Distinct mare areas with different compositions (Mark Phillips)...

L18 Mare Serenitatis dark edges

L19 Alpine Valley Lunar graben (Randall Stevenson)...

L19 Alpine Valley

L20 Posidonius - Floor-fractured crater (Radim Stano)...

L20 Posidonius

L21 Fracastorius - Crater with subsided and fractured floor (Radim Stano)...

L21 Fracastorius

L22 Aristarchus Plateau Mysterious uplifted region mantled with pyroclastics (Radim Stano)...

L22 Aristarchus Plateau

L23 Pico Isolated Imbrium basin-ring fragment (Mark Phillips)...

L23 Pico

L25 Messier & Messier A - Oblique ricochet-impact pair (Mike McGovern)...

L25 Messier & Messier A

L27 Archimedes Large crater lacking central peak (Radim Stano)...

L27 Archimedes

L30 Schiller Possible oblique impact (Radim Stano)...

L30 Schiller

L31 Taruntius Young floor-fractured crater (Mark Phillips)...

L31 Taruntius

L32 Arago Alpha & Beta Volcanic domes (Radim Stano)...

L32 Arago Alpha & Beta

L33 Serpentine Ridge Basin inner-ring segment (Mike McGovern)...

L33 Serpentine Ridge

L34 Lacus Mortis - Strange crater with rille and ridge (Radim Stano)...

L34 Lacus Mortis

L38 Sabine and Ritter Possible twin impacts (Radim Stano)...

L38 Sabine and Ritter

L39 Schickard Crater floor with Orientale basin ejecta stripe (Mark Phillips)...

L39 Schickard

L40 Janssen Rille Rare example of a highland rille (Radim Stano)...

L40 Janssen Rille

L41 Bessel ray - Ray of uncertain origin near Bessel (Mike McGovern)...

L41 Bessel ray

L42 Marius Hills Complex of volcanic domes & hills (Radim Stano)...

L42 Marius Hills

L45 Maurolycus Region of saturation cratering (Radim Stano)...

L45 Maurolycus

L47 Alphonsus dark spots Dark-halo eruptions on crater floor (Mark Phillips)...

L47 Alphonsus dark spots

L48 Cauchy region Fault, rilles and domes (Mark Phillips)...

L48 Cauchy region

L49 Gruithuisen Delta and Gamma Volcanic domes formed with viscous lavas (Mark Phillips)...

L49 Gruithuisen Delta and Gamma

L51 Davy crater chain Result of comet-fragment impacts (Mark Phillips)...

L51 Davy crater chain

L53 Lamont Possible buried basin (Radim Stano)...

L53 Lamont

L54 Hippalus Rilles Rilles concentric to Humorum basin (Radim Stano)...

L54 Hippalus Rilles

L55 Baco Unusually smooth crater floor and surrounding plains (Radim Stano)...

L55 Baco

L56 Australe basin A partially flooded ancient basin (Mike McGovern)...

L56 Australe basin

L58 Rheita Valley Basin secondary-crater chain...

L58 Rheita Valley

L60 Kies Pi Volcanic dome (Radim Stano)...

L60 Kies Pi

L61 Mösting A Simple crater close to center of lunar near side (Radim Stano)...

L61 Mösting A

L64 Descartes Apollo 16 landing site; putative region of highland volcanism (Radim Stano)...

L64 Descartes

L65 Hortensius domes Dome field north of Hortensius (Mark Phillips)...

L65 Hortensius domes

L66 Hadley Rille Lava channel near Apollo 15 landing site (Mike McGovern)...

L66 Hadley Rille

L67 Fra Mauro formation Apollo 14 landing site on Imbrium ejecta (Mark Phillips)...

L67 Fra Mauro formation

L68 Flamsteed P Proposed young volcanic crater and Surveyor 1 landing site (Radim Stano)...

L68 Flamsteed P

L69 Copernicus secondary craters Rays and craterlets near Pytheas (Mark Phillips)...

L69 Copernicus secondary craters

L72 Atlas dark-halo craters Explosive volcanic pits on the floor of Atlas (Radim Stano)...

L72 Atlas dark-halo craters

L74Copernicus H Dark-halo impact crater (Mark Phillips)...

L74Copernicus H

L75 Ptolemaeus B - Saucer-like depression on the floor of Ptolemaeus (Mike McGovern)...

L75 Ptolemaeus B

L79 Sinus Aestuum Eastern dark-mantle volcanic deposit (Mike McGovern)...

L79 Sinus Aestuum

L81 Hesiodus A Concentric crater (Radim Stano)...

L81 Hesiodus A

L83 Plato craterlets Crater pits at limits of detection (Mark Phillips)...

L83 Plato craterlets

L84 Pitatus Crater with concentric rilles (Radim Stano)...

L84 Pitatus

L85 Langrenus rays Aged ray system (Radim Stano)...

L85 – Langrenus with rays

L86 Prinz Rilles Rille system near the crater Prinz (Mark Phillips)...

L86 Prinz Rilles

L90 Armstrong, Aldrin and Collins Small craters near the Apollo 11 landing site (Radim Stano)...

L90 Armstrong, Aldrin and Collins

L92 Gyldén Valley Part of the Imbrium radial sculpture (Radim Stano)...

L92 Gyldén Valley

L93 Dionysius rays Unusual and rare dark rays (Radim Stano)...

L93 Dionysius rays

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