The Lunar 100 list is from "Introducing the Lunar 100"
by Charles A. Wood (Sky &
Telescope, Sky Publishing Corp., April 2004,
Vol. 107, No. 4, pp. 113-120).
All rights remain with Sky Publishing Corp.
I (MSS) have transcribed this list for my personal use
and any errors are mine.
Unless stated otherwise, all photographs will be oriented such that north is up and lunar west to the left.
|11||Aristarchus||Very bright crater with dark bands on its walls||23.7°N||47.4°W||40 km||Rükl 18|
The crater with the bright wall, its most easily observed feature, is Aristarchus (L11). The wall is actually distinctly terraced but the terracing is not evident in this photo. The highlands to the northwest is the Aristarchus plateau (L22). The plateau is a little more prominent in the Gruithuisen domes photo. West of Aristarchus and the Aristarchus plateau is Schroter's Valley (L17), a gigantic rille which was quite obvious this evening. To the east are the Montes Harbinger and to the northeast, the Gruithuisen domes and their associated lava field.
|13||Gassendi||Floor-fractured crater||17.6°S||40.1°W||101 km||Rükl 52|
|44||Mersenius||Domed floor cut by secondary craters||21.5°S||49.2°W||84 km||Rükl 51|
The larger crater with central peaks to the northeast is Gassendi (L13). The fractured floor of this crater is not clearly visible in this photo with this sun angle but some lighter "lines", sunlight reflected off some fractures are visible giving hints of this structure. The flat region below and to the east is Mare Humorum.
The crater with the domed floor to the southwest of the photo is Mersenius (L44) which has the "micro" craters. Three or four of these micro craters are just visible in this image.
Finally, note the linear depressions or channels to the southwest. This is the De Gasparis Rille region (L91) It looks like one can trace these past the east side of Mersenius up to the west side of Gassendi.
|14||Sinus Iridum||Very large crater with missing rim||45.0°N||32.0°W||260 km||Rükl 10|
Sinus Iridum (L14) appears at the bottom center of the picture. It is a large crater that was flooded with the creation of Mare Imbrium the large, flat region to the southeast. Note that to the northeast of Sinus Iridum, in Mare Imbrium, is a chain of mountains which are part of the Imbrium basin ring.
|6||Tycho||Large rayed crater with impact melts||43.4°S||11.1°W||102 km||Rükl 64|
|9||Clavius||Lacks basin features in spite of its size||58.8°S||14.1°W||245 km||Rükl 72|
|30||Schiller||Possible oblique impact||51.9°S||39.0°W||180 km||Rükl 71|
|59||Schiller-Zucchius basin||Badly degraded overlooked basin||56.0°S||45.0°W||335 km||Rükl 70,71|
Mighty Tycho (L6) is to the northeast. When illuminated by the Sun, Tycho is so bright and its rays so prominent that it is identifiable even in binoculars. This indicates it is a young crater.
A few of Tycho's rays are just visible, one of which passes west of the large but shallow crater Clavius. I'll always be fond of Clavius because it was the site of the U.S. Moon base in the movie 2001: A Space Odyssey.
Schiller (L30) is the unusual, oblong crater to the west-southwest. Schiller may be the result of a meteor striking at a very shallow angle. It rests on the northern edge of the Schiller-Zucchius basin (L59). Use Schiller as a starting point to trace out its rim, first to the west, where its identifying number appears, then to the south, near the terminator, around, near the left edge of the picture and back up to Schiller. It is about twice the size of the Schiller crater but has been almost hidden by subsequent cratering.
|49||Gruithuisen Delta and Gamma||Volcanic domes formed with viscous lavas||36.3°N||40.0°W||20 km||Rükl 9|
The most prominent features in this photo are the bright rimmed crater Aristarchus and the Aristarchus plateau near the center of the photo. But there is much more here. Near the top are the Gruithuisen delta and gamma (L49) believed to be caused by viscous lava pushing upwards creating these domes. Note the associated lava flow to the northwest with the different texture. Below the Gruithuisen domes are the similar looking Montes Harbinger.
|68||Flamsteed P||Proposed young volcanic crater; Surveyor 1 landing site||3.0°S||44.0°W||Rükl 40|
Flamsteed P is centered in the photo. In a string off to the southeast are: Flamsteed, Flamsteed B and Flamsteed A.