Ritchey (lunar crater)

Ritchey
Apollo 16 image
Coordinates 11°06′S 8°30′E / 11.1°S 8.5°E / -11.1; 8.5Coordinates: 11°06′S 8°30′E / 11.1°S 8.5°E / -11.1; 8.5
Diameter 25 km
Depth 1.3 km
Colongitude 352° at sunrise
Eponym George W. Ritchey

Ritchey is a small lunar impact crater named after the American astronomer George W. Ritchey. The crater is situated to the east of Albategnius in the central lunar highlands, it is also northeast of Burnham, and west of Andĕl. Its somewhat angular rim is broken along the northwestern wall by a pair of smaller, adjacent craters. The floor of Ritchey is fairly flat, with a pair of small central mounds. North of Ritchey is a satellite crater known as Ritchey F, its southernmost rim is only hilly and is almost missing, its elevation is nearly the same as the main crater.

Satellite craters

By convention these features are identified on lunar maps by placing the letter on the side of the satellite midpoint that is closest to Ritchey.

Ritchey crater and its satellite craters taken from Earth in 2012 at the University of Hertfordshire's Bayfordbury Observatory with the telescopes Meade LX200 14" and Lumenera Skynyx 2-1
Ritchey Latitude Longitude Diameter
A 11.3° S 7.7° E 6 km
B 11.9° S 8.9° E 7 km
C 10.9° S 9.2° E 6 km
D 10.2° S 9.2° E 6 km
E 10.7° S 8.4° E 14 km
F 10.5° S 7.6° E 4 km
J 12.3° S 9.9° E 17 km
M 12.4° S 9.5° E 8 km
N 11.1° S 10.0° E 17 km

References

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  • Price, Fred W. (1988). The Moon Observer's Handbook. Cambridge University Press. ISBN 978-0-521-33500-3.
  • Rükl, Antonín (1990). Atlas of the Moon. Kalmbach Books. ISBN 978-0-913135-17-4.
  • Webb, Rev. T. W. (1962). Celestial Objects for Common Telescopes (6th revised ed.). Dover. ISBN 978-0-486-20917-3.
  • Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. ISBN 978-0-521-62248-6.
  • Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 978-1-85233-193-1.
  • Wood, Charles (November 8, 2009). "Somewhere Over the Rainbow". Lunar Photo of the Day.
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