Hedin (crater)

Hedin
	Lunar Orbiter 4 image
Coordinates	2.0°N 76.5°W
Diameter	150 km
Depth	Unknown
Colongitude	77° at sunrise
Eponym	Sven A. Hedin

Hedin is a lunar impact crater of the dimension traditionally termed a walled plain. It lies due south of the crater pair Olbers and Glushko, and northwest of the similarly dimensioned walled plain Riccioli. To the east is another walled plain, Hevelius.

Clementine mosaic of Hedin. Eroded crater rim is practically invisible at this high sun angle, but the dark mare deposit is prominent.

This crater has a deteriorated outer rim that has been worn down and reshaped through impact erosion. Several small craters lie along or near the rim, including Hedin F to the northeast and Hedin H to the southeast.

The interior floor has been scored by the impact event that created the Mare Orientale to the southeast. But these features are cross-hatched by a pair of linear rilles that follow a path towards the southeast. Only a section of the floor along the northwest rim is relatively level, retaining the low albedo of ground that has been resurfaced by lava.

This crater is sometimes referred to as "Sven Hedin" in older publications.

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 Hedin.

Hedin	Latitude	Longitude	Diameter
A	5.5° N	78.1° W	60 km
B	4.4° N	83.7° W	20 km
C	4.4° N	84.6° W	10 km
F	4.0° N	74.4° W	19 km
G	3.8° N	73.4° W	14 km
H	3.0° N	72.2° W	11 km
K	2.9° N	73.0° W	11 km
L	5.1° N	71.3° W	10 km
N	4.9° N	71.7° W	24 km
R	5.3° N	75.9° W	7 km
S	5.7° N	75.1° W	8 km
T	4.2° N	72.8° W	7 km
V	5.2° N	73.7° W	9 km
Z	1.9° N	78.9° W	10 km

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References

Andersson, L. E.; Whitaker, E. A. (1982). NASA Catalogue of Lunar Nomenclature. NASA RP-1097.CS1 maint: ref=harv (link)
Blue, Jennifer (July 25, 2007). "Gazetteer of Planetary Nomenclature". USGS. Retrieved 2007-08-05.CS1 maint: ref=harv (link)
Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 978-0-521-81528-4.CS1 maint: ref=harv (link)
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.CS1 maint: ref=harv (link)
McDowell, Jonathan (July 15, 2007). "Lunar Nomenclature". Jonathan's Space Report. Retrieved 2007-10-24.CS1 maint: ref=harv (link)
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.CS1 maint: ref=harv (link)
Moore, Patrick (2001). On the Moon. Sterling Publishing Co. ISBN 978-0-304-35469-6.CS1 maint: ref=harv (link)
Price, Fred W. (1988). The Moon Observer's Handbook. Cambridge University Press. ISBN 978-0-521-33500-3.CS1 maint: ref=harv (link)
Rükl, Antonín (1990). Atlas of the Moon. Kalmbach Books. ISBN 978-0-913135-17-4.CS1 maint: ref=harv (link)
Webb, Rev. T. W. (1962). Celestial Objects for Common Telescopes (6th revised ed.). Dover. ISBN 978-0-486-20917-3.CS1 maint: ref=harv (link)
Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. ISBN 978-0-521-62248-6.CS1 maint: ref=harv (link)
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