BRIEF DESCRIPTION
The area surrounding the prime meridian, south of the walled plains Ptolemaeus and Alphonsus, is a region of large craters. These two, together with Arzachel, form an impressive trio. On the western edge of the chart the "continental" structures give way to the darker Mare Nubium (Section 54). Refer to your copy of the Antonin Rukl lunar atlas chart, page 137.

EARTH-BASED TELESCOPIC IMAGES:
Image - Aliacensis (Poyet)
Image - Arzachel (Cidadao)
Image - Arzachel (Zerbe)
Image - Arzachel & Alpetragius (Ferreira)
Image - Arzachel, including Ptolemaeus & Alphonsus (Legault)
Image - Arzachel, including Alphonsus & Ptolemaeus (Cazard)
Image - Arzachel, including Alphonsus & Ptolemaeus (Therin)
Image - Arzachel, including Alphonsus & Ptolemaeus (Therin)
Image - Arzachel (Massey)
Image - Purbach (Poyet)
Image - Thebit (Poyet)

RANGER SPACECRAFT IMAGES:
Image - Ranger 7 - First image of the Moon from a U.S. spacecraft

LUNAR ORBITER IMAGES:
Lunar Orbiter Database
Alpetragius, 40 km
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-108H2.jpg
Arzachel, 97 km
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-108H2.jpg
Arzachel, Rimae
Blanchinus, 58x68
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-101H1.jpg
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-108H1.jpg
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-107H3.jpg
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-118H3.jpg
Delaunay, 46 km
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-101H1.jpg
Donati, 36 km
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-101H1.jpg
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-101H2.jpg
Faye, 37 km
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-101H1.jpg
Krusenstern, 47 km
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-100H3.jpg
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-101H1.jpg
la Caille, 68 km
Parrot, 70 km
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-101H2.jpg
Purbach, 118 km
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-108H1.jpg
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-107H3.jpg
Regiomontanus, 126x110 km
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-108H1.jpg
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-107H3.jpg
Thebit, 57 km
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-108H1.jpg
Werner, 70 km
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-100H3.jpg
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-107H3.jpg
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-108H1.jpg
 http://cass.jsc.nasa.gov/research/lunar_orbiter/img/4-101H1.jpg

RESEARCH UPDATES:
Arzachel (Lunascan)
AS16-2478(M) - Oblique view of Alphonsus (AOTM, SP-362)
AS16-4656(P) - Part of floor of Alphonsus (SP-362,206)
Alpetragius (Wood)
Alpetragius (The Moon - Wilkens & Moore)