Angström (crater)

Angström
	Apollo 15 image
Coordinates	29°54′N 41°36′W / 29.9°N 41.6°W
Diameter	9.55 km (5.93 mi)
Depth	2.0 km (1.2 mi)
Colongitude	42° at sunrise
Eponym	Anders J. Ångström

Oblique view from Apollo 15. *NASA photo.*

Ångström is a small lunar impact crater located on the border between Oceanus Procellarum to the west and Mare Imbrium to the east.^[3] To the south is a formation of mountains rising out of the mare named the Montes Harbinger. To the east are some wrinkle ridges named the Dorsum Bucher and Dorsa Argand.^[4]^: 39

This formation is bowl-shaped, with a circular rim and inner walls that slope down to the small central floor.^[5] It has a higher albedo than the surrounding maria.^[4]^: 39 The crater halo is radar dark, indicating a lack of larger blocks among the fine ejecta.^[6]

This crater is named after Anders Jonas Ångström (1814-1874), a Swedish physicist and one of the pioneers of the science of spectroscopy. Its designation was formally adopted by the International Astronomical Union in 1935.^[1] The name was introduced into lunar nomenclature by J. N. Krieger and R. König in 1912.^[7]

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 Ångström.^[8]

Ångström^[4]^: 291	Latitude	Longitude	Diameter
A	30.9° N	41.1° W	6 km
B	31.7° N	44.1° W	6 km

References

1 2 3 4 "Ångström". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
↑ Pike, R. J. (September 1976). "Crater Dimensions from Apollo Data and Supplemental Sources". The Moon. 15 (3–4): 463–477. Bibcode:1976Moon...15..463P. doi:10.1007/BF00562253.
↑ Moore, Patrick (2001). On the Moon. Sterling Publishing Co. p. 169. ISBN 978-0-304-35469-6.
1 2 3 Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. p. 291. ISBN 978-0-521-81528-4.
↑ "LTO-39A2 Angström". Lunar Topographic Orthophotomap (LTO) Series. Lunar and Planetary Institute. Retrieved 2026-05-16.
↑ Ghent, Rebecca R.; et al. (February 2005). "Earth-based observations of radar-dark crater haloes on the Moon: Implications for regolith properties". Journal of Geophysical Research. 110 (E2): E02005. Bibcode:2005JGRE..110.2005G. doi:10.1029/2004JE002366. E02005.
↑ Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. p. 236. ISBN 978-0-521-62248-6.
↑ Grego, P. (2015). "Satellite Crater". In Hargitai, H.; Kereszturi, Á. (eds.). Encyclopedia of Planetary Landforms. New York, NY: Springer. doi:10.1007/978-1-4614-3134-3_328.

External links

Media related to Angstrom (crater) at Wikimedia Commons

[GPN-1] 1 2 3 4 "Ångström". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.

[Pike_1976-2] Pike, R. J. (September 1976). "Crater Dimensions from Apollo Data and Supplemental Sources". The Moon. 15 (3–4): 463–477. Bibcode:1976Moon...15..463P. doi:10.1007/BF00562253.

[Moore_2001-3] Moore, Patrick (2001). On the Moon. Sterling Publishing Co. p. 169. ISBN 978-0-304-35469-6.

[Bussey_Spudis_2004-4] 1 2 3 Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. p. 291. ISBN 978-0-521-81528-4.

[LTO-39A2-5] "LTO-39A2 Angström". Lunar Topographic Orthophotomap (LTO) Series. Lunar and Planetary Institute. Retrieved 2026-05-16.

[Ghent_et_al_2005-6] Ghent, Rebecca R.; et al. (February 2005). "Earth-based observations of radar-dark crater haloes on the Moon: Implications for regolith properties". Journal of Geophysical Research. 110 (E2): E02005. Bibcode:2005JGRE..110.2005G. doi:10.1029/2004JE002366. E02005.

[Whitaker_1999-7] Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. p. 236. ISBN 978-0-521-62248-6.

[Grego_2015-8] Grego, P. (2015). "Satellite Crater". In Hargitai, H.; Kereszturi, Á. (eds.). Encyclopedia of Planetary Landforms. New York, NY: Springer. doi:10.1007/978-1-4614-3134-3_328.

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

Moon
Outline
Physical properties	Internal structure Topography Atmosphere Gravity field Hill sphere Magnetic field Sodium tail Moonlight Earthlight
Orbit	Orbital elements Distance Perigee and apogee Libration Nodes Nodal period Precession Syzygy New moon Full moon Eclipses Lunar eclipse Total penumbral lunar eclipse Tetrad Solar eclipse Solar eclipses on the Moon Eclipse cycle Supermoon Tide Tidal force Tidal locking Tidal acceleration Tidal range Kordylewski clouds Lunar station
Surface and features	Selenography Terminator Limb Hemispheres Near side Far side Poles North pole South pole Face Maria List Mountains Peak of eternal light Valleys Volcanic features Domes Calderas Lava tubes Craters List A–B C–F G–K L–N O–Q R–S T–Z Ray systems Permanently shadowed craters South Pole–Aitken basin Regolith swirls Rilles Wrinkle ridges Rocks Lunar basalt 70017 Changesite-(Y) Water Space weathering Micrometeorite Sputtering Quakes Transient lunar phenomenon Selenographic coordinate system
Science	Observation Libration Lunar theory Origin Giant-impact hypothesis Theia Lunar magma ocean Geology Timescale Late Heavy Bombardment Lunar meteorites KREEP Volcanism Experiments Lunar laser ranging ALSEP Lunar sample displays Apollo 11 Apollo 17 Lunar seismology
Exploration	Missions Apollo program Artemis program Explorers Probes Landing Colonization Moonbase Tourism Lunar habitation Lunar resources
Time-telling and navigation	Lunar calendar Lunisolar calendar Month Lunar month Nodal period Fortnight Sennight Lunar station Lunar distance
Phases and names	New Full Names Crescent Super and micro Blood Blue Dark Wet Tetrad
Daily phenomena	Moonrise Meridian passage Moonset
Related	Lunar deities Lunar effect Earth phase Moon illusion Pareidolia Man in the Moon Moon rabbit Craters named after people Artificial objects on the Moon Memorials on the Moon Moon in science fiction list Apollo era futuristic exploration Hollow Moon Moon landing conspiracy theories Moon Treaty "Moon is made of green cheese" Natural satellite Double planet Lilith (hypothetical second moon) Splitting of the Moon
Category