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Lat: 25.5°S, Long: 2.3°W, Diam: 115 km, Depth: 2.98 km, Rükl: 55, pre-Nectarian

external image normal_purbach_050807_04h58tu.jpg
François Emond North is at about 2 o'clock in this image.


LPOD Photo Gallery Lunar Orbiter Images Apollo Images
- Purbach is one of the most southern (officially named) lunar formations on the moon's near side which was photographed by the south-looking mapping/metric Fairchild camera of Apollo 16. Frame AS16-M-0711 (of Apollo 16's REV 26) shows Purbach almost touching the central part of the depicted curved horizon. The zoomify scan of this photograph (Frame 0711) which is online in the Apollo Image Archive of the Arizona State University (ASU) is a good source to explore the Purbach-region simultaneously with Antonin Rukl's chart 55 in his Atlas of the Moon.
- The ASU's zoomify scan of Frame AS16-M-0711.
- Research orbital Apollo 16 photography: Danny Caes.


(LAC zone 95D2) LAC map Geologic map


Description: Elger

(IAU Directions) PURBACH.--An immense enclosure of irregular shape, approximating to that of a rhomboid with slightly curved sides. It is fully 60 miles across, and the walls in places exceed 8,000 feet in altitude, and include many depressions, large and small. On the W. inner slope are some fine terraces and several craters. The continuity of the circumvallation is broken on the N. by a great ring-plain, on the floor of which I have seen a prominent cleft and a crater near the S. side. There is a large bright crater in the interior of Purbach, S. of the centre, two others on the E. half of the floor, and a few ridges.

Description: Wikipedia


Additional Information

Depth data from Kurt Fisher database
  • Westfall, 2000: 2.98 km
  • Viscardy, 1985: 2.4 km
  • Cherrington, 1969: 2.98 km
  • Central peak height
    • Sekiguchi, 1972: 8 peaks, none higher than 0.7 km. The apparent true central peak is 0.1 km - fatastronomer

The rim of Purbach is part of the Lunar X (which is a well-known telescopic clair-obscur phenomenon for observers of the First Quarter Moon).


Georg von; Austrian mathematician, astronomer (1423-1461).
  • This name was introduced as Purbachias on Riccioli's map, and (aside from the change is spelling) has continued in use for the same feature (Whitaker, p. 218).

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