Barbier (crater)

Barbier
Lunar Orbiter 2 image
Coordinates23°48′S 157°54′E / 23.8°S 157.9°E / -23.8; 157.9
Diameter65.38 km (40.63 mi)[1]
DepthUnknown
Colongitude204° at sunrise
FormationPre-Nectarian[2]
EponymDaniel Barbier
Barbier F, in the interior of Barbier, from Apollo 15 panoramic camera
Oblique view facing southeast from Apollo 17

Barbier is a lunar impact crater that is located on the southern hemisphere on the far side of the Moon.[3] It is located close to the western edge of the South Pole-Aitken basin.[4] Barbier forms a matched pair with Cyrano to the north-northwest, and it lies to the southeast of Gagarin, a huge walled plain. Southwest of Barbier is the crater Sierpinski, and to the southeast is the Mare Ingenii.[5]

On the lunar geologic timescale, this crater dates to the Pre-Nectarian epoch.[2] The outer rim of Barbier has been eroded somewhat by subsequent impacts, particularly at the north end where the wall has been degraded by several small craterlets. A small crater lies across the eastern rim, and the southern rim is wider and irregular in shape. An unusual irregular crater (Barbier F) with a hummocky floor, approximately 16 km long, lies near where a central peak would be located, offset to the east of the midpoint.[6]: 103 

This crater is named after French astronomer Daniel Barbier (1907–1965).[7] This designation was formally adopted by the International Astronomical Union in 1970.[1]

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 Barbier.[8]

Barbier[6]: 292  Latitude Longitude Diameter
F 23.8° S 158.1° E 14 km
D 23.0° S 160.2° E 24 km
G 24.4° S 160.1° E 17 km
H 25.3° S 160.5° E 17 km
J 26.0° S 160.1° E 43 km
K 26.5° S 159.4° E 7 km
U 22.8° S 155.1° E 38 km
V 22.3° S 154.6° E 29 km

See also

References

  1. 1 2 "Barbier". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  2. 1 2 Wilhelms, Don E.; McCauley, John F.; Trask, Newell J. (1987). The geologic history of the Moon. USGS Professional Paper 1348. Washington: U.S. Government Printing Office. Bibcode:1987ghm..book.....W. doi:10.3133/pp1348. Table 8.3.
  3. ↑ Moore, Patrick (2000). The Data Book of Astronomy. CRC Press. p. 66. ISBN 978-1-4200-3344-1.
  4. ↑ Park, Hyeonhu; et al. (November 2024). "Evidence for Magnetized Basin Ejecta on the Moon From Observations and Modeling of Demagnetized Craters". Journal of Geophysical Research: Planets. 129 (11) e2024JE008420. Bibcode:2024JGRE..12908420P. doi:10.1029/2024JE008420.
  5. ↑ "LAC 103" (PDF). Gazeteer of Planetary Nomenclature. Retrieved 2026-06-10.
  6. 1 2 Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. p. 292. ISBN 978-0-521-81528-4.
  7. ↑ Menzel, D. H.; et al. (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.
  8. ↑ Grego, P. (2015). "Satellite Crater". In Hargitai, H.; Kereszturi, Á. (eds.). Encyclopedia of Planetary Landforms. New York, NY: Springer. pp. 1858–1859. doi:10.1007/978-1-4614-3134-3_328. ISBN 978-1-4614-3133-6.

Sources

  • 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.
  • Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 978-1-85233-193-1.
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  • Figure 238 in Chapter 7 of APOLLO OVER THE MOON: A View From Orbit (NASA SP-362, 1978) shows a closeup of the unusual crater near the center of Barbier crater
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