Hilbert (crater)

Hilbert

Hilbert from Apollo 15. NASA photo.
Coordinates 17°52′S 108°19′E / 17.87°S 108.32°E / -17.87; 108.32Coordinates: 17°52′S 108°19′E / 17.87°S 108.32°E / -17.87; 108.32
Diameter 173.24 km
Depth Unknown
Colongitude 254° at sunrise
Eponym David Hilbert
Lunar Orbiter 2 image
Oblique Lunar Orbiter 1 image

Hilbert is a lunar crater that is located on the far side of the Moon, just past the southeast limb. It lies just beyond the region of the surface that is occasionally brought into view due to libration, and so this feature cannot be observed directly from the Earth.

The crater is attached to the southeast rim of the walled plain Pasteur, a formation nearly half as large again as Hilbert. To the southeast of Hilbert is the smaller crater Alden, while Backlund lies to the west-northwest.

Much of the outer rim of Hilbert remains relatively intact, although it is heavily eroded in places particularly in the south. The interior is relatively flat, but has been deeply gouged by several small craters. There is a short range of central ridges offset to the west of the interior midpoint. Just to the west of the ridges is Hilbert W, a crater with a smaller crater overlying the western rim, giving it a pear-like shape. Hilbert H is a circular, bowl-shaped crater in the east part of the floor. Next to the northern rim is Hilbert Y. There are also many lesser craterlets scattered about the interior.

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 Hilbert.

Hilbert Latitude Longitude Diameter
A 15.9° S 108.7° E 11 km
E 16.5° S 111.8° E 49 km
G 19.0° S 114.0° E 50 km
H 18.2° S 109.6° E 14 km
L 21.2° S 108.9° E 32 km
S 18.1° S 105.8° E 12 km
W 17.1° S 107.6° E 20 km
Y 15.6° S 107.5° E 28 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. 
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  • Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 978-1-85233-193-1. 
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