Hahn (crater)
 Oblique Lunar Orbiter 4 image | |
| Coordinates | 31°18′N 73°36′E / 31.3°N 73.6°E |
|---|---|
| Diameter | 84 km |
| Depth | 3.0 km |
| Colongitude | 288° at sunrise |
| Eponym | Friedrich von Hahn Otto Hahn[1] |
Hahn is a lunar impact crater that is located near the northeastern limb of the Moon. The crater appears oval when viewed from the Earth due to foreshortening. It is located less than one crater diameter to the southeast of Berosus, a slightly smaller formation.
This formation dates to the Early Imbrian epoch of the lunar geologic timescale.[2] The inner wall of Hahn contains a system of terraces, particularly in the southern half. A smaller crater lies across the northwest rim, forming a break that reaches the interior floor. The interior floor has a region of lower albedo in the northern half, making it darker in appearance than the southern section of the floor. At the midpoint of the interior is an elongated central ridge, with the longer extent oriented north–south. The floor is also marked by several tiny craterlets.
The name Berosus was originally applied to this crater by Italian astronomer Giovanni Riccioli in 1651, but it was later changed to Hanh by German astronomer Johann Mädler.[3]
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 Hahn.
| Hahn | Latitude | Longitude | Diameter |
|---|---|---|---|
| A | 29.7° N | 69.7° E | 17 km |
| B | 31.4° N | 77.0° E | 15 km |
| D | 27.5° N | 68.6° E | 15 km |
| E | 27.7° N | 70.0° E | 15 km |
| F | 32.2° N | 73.0° E | 23 km |
References
- ↑ "Planetary Names: Crater, craters: Hahn on Moon".
- ↑ Tompkins, Stefanie; Pieters, Carle M. (January 1999). "Mineralogy of the lunar crust: Results from Clementine". Meteoritics & Planetary Science. 34 (1): 25–41. Bibcode:1999M&PS...34...25T. doi:10.1111/j.1945-5100.1999.tb01729.x.
- ↑ Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. p. 211, 219. ISBN 978-0-521-62248-6.
Sources
- Wood, Chuck (December 27, 2006). "A Dark Oblique Ray". Lunar Photo of the Day. Archived from the original on September 27, 2007. Retrieved 2007-01-02.
- Andersson, L. E.; Whitaker, E. A. (1982). NASA Catalogue of Lunar Nomenclature. NASA RP-1097.
- Blue, Jennifer (July 25, 2007). "Gazetteer of Planetary Nomenclature". USGS. Retrieved 2007-08-05.
- Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 978-0-521-81528-4.
- Cocks, Elijah E.; Cocks, Josiah C. (1995). Who's Who on the Moon: A Biographical Dictionary of Lunar Nomenclature. Tudor Publishers. ISBN 978-0-936389-27-1.
- McDowell, Jonathan (July 15, 2007). "Lunar Nomenclature". Jonathan's Space Report. Archived from the original on 2012-02-08. Retrieved 2007-10-24.
- Menzel, D. H.; Minnaert, M.; Levin, B.; Dollfus, A.; Bell, B. (1971). "Report on Lunar Nomenclature by the Working Group of Commission 17 of the IAU". Space Science Reviews. 12 (2): 136–186. Bibcode:1971SSRv...12..136M. doi:10.1007/BF00171763. S2CID 122125855.
- 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.
{{cite book}}: ISBN / Date incompatibility (help) - Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 978-1-85233-193-1.