Idelʹson (crater)

Idelʹson is a lunar impact crater that is located on the far side of the Moon. It lies just behind the southern lunar limb, in a region that is sometimes brought into view of the Earth due to libration. Idel'son is situated to the southwest of the huge walled plain Schrödinger.

Idelʹson
Coordinates81.5°S 110.9°E / -81.5; 110.9
Diameter60 km
DepthUnknown
Colongitude245° at sunrise
EponymNaum I. Idelʹson

The northern rim of Idelʹson is overlain by the larger crater Ganswindt, reversing the usual order of smaller craters on top of larger impacts usually seen on the Moon. The outer glacis of Ganswindt covers nearly half the interior floor of Idelʹson, reaching to the midpoint. The remainder of the interior and rim of the crater has been partly overlain by ejecta, producing a rounded, lumpy surface. Still the surviving outer rim remains distinct, and is not overlain by any other impacts of note. The largest impact within the interior is a tiny crater next to the southeastern inner wall.

Satellite craters

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

Idelʹson Latitude Longitude Diameter
L 84.2° S 115.8° E 28 km

References

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  • Moore, Patrick (2001). On the Moon. Sterling Publishing Co. ISBN 978-0-304-35469-6.
  • 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.
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