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Lat: 33.3°S, Long: 21.1°W, Diam: 40 km, Depth: 2.76 km, Rükl: 63, Eratosthenian

external image Cichus-IV131-h3.jpg


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(LAC zone 111B1) LAC map Geologic map


Description: Elger

(IAU Directions) CICHUS.--A conspicuous ring-plain, about 20 miles in diameter, with a prominent deep crater about 6 miles across on its W. rim. It is situated on a curious boot-shaped plateau, near the S. end of the rocky mountain barrier associated with the last two formations. Its walls rise about 9,000 feet above a sunken floor, on which there is some faint detail, but apparently nothing deserving the distinction of a central mountain. The plateau on the N. is cut through by a fine broad valley, which has obviously interfered with a large crateriform depression on its southern edge. A cleft runs from a small crater E. of the plateau up to this valley, and extends beyond to the E. wall of Capuanus. There is also a delicate cleft crossing the region S. of Cichus to the group of complicated formations S.E. of Capuanus. As already mentioned, the great Hesiodus cleft is associated with the Cichus plateau.

Description: Wikipedia


Additional Information

Depth data from Kurt Fisher database
  • Westfall, 2000: 2.76 km
  • Viscardy, 1985: 2.76 km
  • Satellite craters Cichus B and C are on the ALPO list of banded craters
  • According to T.W. Webb (the author of the classic guide Celestial Objects for Common Telescopes) there was (or still is) a small crater in or near Cichus which "grew larger as compared to the earlier representations of Schroter and Madler". Source: Epic Moon (Sheehan/ Dobbins, page 142).- DannyCaes Sep 22, 2013


- Francesco Degli Stabili (Cecco D'Ascoli); Italian astronomer (1257-1327).

Tee depression

- An officially unnamed depression south of Cichus A is nicknamed the Tee depression (or Tee-shaped depression) by Charles Wood, see LPOD Museum of Oddities.

LPOD Articles

Smaller and Smaller Rilles


A Portfolio of Lunar Drawings (Harold Hill), pages 116, 117.