BRIEF DESCRIPTION
The central part of the near-side of the Moon, with large walled plains. The dark surface of Sinus Medii, bordered by clefts, extends into this area from the north. This region, like that of Section 43, contains a network of valleys and clefts radiating from Mare Imbrium. The floor of the crater Alphonsus was the crash-landing site of probe Ranger IX. Refer to your Antonin Rukl lunar atlas chart, page 115.

EARTH-BASED TELESCOPIC IMAGES:
Image - Albategnius (Unknown)
Image - Alphonsus region, south up (LPL/Rik Hill)
Image - Alphonsus (Zerbe)
Image - Alphonsus, low sun angle (AstroImaging)
Image - Alphonsus, Ptolemaeus & Arzachel (Legault)
Image - Alphonsus & Ptolemaeus, including Arzachel  (Cazard)
Image - Alphonsus, Ptolemaeus & Arzachel, photo (Therin)
Image - Alphonsus, Ptolemaeus & Arzachel (Therin)
Image - Alphonsus (Genovese)
Image - Alphonsus (Poyet)
Image - Mosting A (Rukl Atlas photo)
Image - Ptolemaeus (Fattinnanzi) Newton 200 f6, Phillips vesta-pro webcam
Image - Ptolemaeus (Cidadao)
Image - Ptolemaeus (Higashida)
Image - Ptolemaeus (Legault)
Image - Ptolemaeus (Poyet)
Image - Reaumur (Poyet)
Image - Ptolemaeus (Genovese)
Image - Ptolemaeus (Zerbe)

RANGER SPACECRAFT IMAGES:
Image - ra7_b001 - Ranger 7 - First image of the Moon taken by a U.S. spacecraft
Image - ra8_b001 - Ranger 8 - Ptolemaeus & Alphonsus craters
Image - ra8_p001 - Ranger 8 - Davy crater chain & Ptolemaeus  from 1300 km
Image - ra9_a001 - First Ranger 9 image, showing Mare Nubium & Alphonsus crater
Image - ra9_a035 - Alphonsus crater on the Moon from 440 km
Image - ra9_a060 - Central peak of Alphonsus crater on the Moon
Image - ra9_a070 - Floor of Alphonsus crater from 7.5 km
Image - ra9_b001 - Ptolemaeus, Alphonsus, and Albategnius on the Moon
Image - ra9_b035 - Northeast rim of Alphonsus crater from 700 km
Image - ra9_b087 - Floor of Alphonsus crater from 15 km
Image - ra9_p001 - P-camera images of Alphonsus crater from 25 km
Image - ra9_p006 - Four images of Alphonsus from 15 km
Image - ra9_p012 - Final two images taken by Ranger 9 before impact

LUNAR ORBITER IMAGES:
 Lunar Orbiter Database
Albategnius, 136 km
Alphonsus, 108 km
Ammonius, 9 km
Flammarion, 75 km
Gylden, 47 km
Herschel, 41 km
Hipparchus, 150 km
Klein, 44 km
Medii, Sinus
Muller, 24x20 km
Oppolzer, 43 km
Ptolemaeus, 153 km
Reaumur, 53 km
Seeliger, 8.5 km
Sporer, 28 km

APOLLO IMAGES:
AS12-51-7507 - Lunar Module over Ptolemaeus, Herschel, and Lalande
 http://www.astrosurf.com/lunascan/as12-51-7507.jpg
AS12-50-7431 - Oblique view of Ptolemaeus from Apollo 12
 http://images.jsc.nasa.gov/images/pao/AS12/10075402.jpg
AS16-0839 - Oblique of Hipparchus crater
 http://nssdc.gsfc.nasa.gov/imgcat/hires/a16_m_0839.gif
AS16-0989 - Overhead view of Ptolemaeus crater
 http://nssdc.gsfc.nasa.gov/imgcat/hires/a16_m_0989.gif
AS16-2478 - Oblique view of Alphonsus
 http://www.astrosurf.com/lunascan/as16-2478.jpg

RESEARCH UPDATES:
On Alphonsus crater or: Observing Changing Solar Illumination On The Moon (GLR Group)
Inconsistant Moon - Alphonsus (Lunascan)
Central Peak Has Crater Or Caldera? - (Lunascan)
Alphonsus (Lunascan)
Moon Shot - Ranger 9 (Lunascan)
AS16-4658 - Ranger 9 impact crater in Alphonsus (SP-362)
Alphonsus (The Moon - Wilkens & Moore)
Crater Alphonsus (A16 M-2478, looking southwards)
AS16-0839(M) - Great oblique shot of Hipparchus looking toward Sinus Medii (SP-362,177)
AS16-0982(M) Imbrium basin near Albategnius (SP-362)
AS16-2965(M) Ptolemaeus (SP-362)
AS16-0708(M) Albategnius (SP-362)
AS16-1411(M) - Mare Imbrium & Herschel (SP-362)
AS16-2478(M) - Oblique view of Alphonsus (SP-362)
AS16-4656(P) - Part of floor of Alphonsus (SP-362,206)
AS16-0989(M) - Ptolemaeus (SP-362)
Article on LTPs in Alphonsus & Aristarchus (Analog)
Ptolemaeus (Lunascan)
Ptolemaeus - A Detailed Report (Lunascan Project)
AS16-1671(M) - Crater chain to the right of Ptolemaeus (SP-362)
AS16-1276(M) - Shot of crater chain of AS16-1671(M) (SP-362)
AS16-4653(P) - Crater  clusters near Ptolemaeus (SP-362)
AS16-4653(P) bu - Extreme blow-up of portion of AS16-4653(P) above
Ptolemaeus: Presence Of Domes? Preliminary Results
Alphonsus, Plato & Ptolemaeus: Segregation of Soil Types By Albedo & Color Data
USAF Lunar Chart of Ranger IX, Alphonsus
LSAP Data (A.L.P.O.)
Anomaly in Ptolemaeus??? (Aerial4U & Lunascan Discussion)
Alphonsus (Roger)
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