Ammonius (crater)

Ammonius
	Slightly oblique view from Apollo 16, facing east
Coordinates	8°30′S 0°48′W / 8.5°S 0.8°W
Diameter	8.55 km (5.31 mi)
Depth	1.54 km (0.96 mi)
Colongitude	1° at sunrise
Eponym	Ammonius Hermiae

Oblique view from Apollo 14, facing west

Ammonius is a bowl-shaped lunar impact crater with a slightly raised rim. It is located on the floor of the walled plain named Ptolemaeus,^[3] about 30 kilometers northeast of the crater midpoint.^[4]

Just to the north on the lava-flooded floor of Ptolemaeus is a relatively prominent "ghost" crater: the discernible buried rim of a pre-existing crater.^[3] The diameter of this ghost crater is nearly double that of Ammonius, and is currently identified as Ptolemaeus B.^[5]

The crater is named after Greek philosopher Ammonius Hermiae (c. A.D. 517–526). In the past this crater was identified as Ptolemaeus A,^[6] before being named by the IAU in 1976.^[1]^[5]

References

1 2 "Ammonius". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
↑ Croft, S. K. (1978). Lunar crater volumes: Interpretation by models of impact cratering and upper crustal structure. Lunar and Planetary Science Conference, 9th, Houston, Tex., March 13-17, 1978, Proceedings (A79-39253 16-91). Vol. 3. New York: Pergamon Press, Inc. p. 3711–3733. Bibcode:1978LPSC....9.3711C.
1 2 Chu, Alan; et al. (2012). The Cambridge Photographic Moon Atlas. Translated by Storm Dunlop. Cambridge University Press. p. 116. ISBN 978-1-107-01973-7.
↑ Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. p. 77. ISBN 978-0-521-81528-4.
1 2 Mobberley, Martin (2006). Lunar and Planetary Webcam User's Guide. The Patrick Moore Practical Astronomy Series. Springer Science & Business Media. p. 151. ISBN 978-1-84628-199-0.
↑ Moore, Patrick; Rees, Robin (2014). Patrick Moore's Data Book of Astronomy (2 ed.). Cambridge University Press. p. 50. ISBN 978-1-139-49522-6.

External links

Ammonius at The Moon Wiki

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

[Croft_1978-2] Croft, S. K. (1978). Lunar crater volumes: Interpretation by models of impact cratering and upper crustal structure. Lunar and Planetary Science Conference, 9th, Houston, Tex., March 13-17, 1978, Proceedings (A79-39253 16-91). Vol. 3. New York: Pergamon Press, Inc. p. 3711–3733. Bibcode:1978LPSC....9.3711C.

[Chu_et_al_2012-3] 1 2 Chu, Alan; et al. (2012). The Cambridge Photographic Moon Atlas. Translated by Storm Dunlop. Cambridge University Press. p. 116. ISBN 978-1-107-01973-7.

[Bussey_Spudis_2004-4] Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. p. 77. ISBN 978-0-521-81528-4.

[Moore_2006-5] 1 2 Mobberley, Martin (2006). Lunar and Planetary Webcam User's Guide. The Patrick Moore Practical Astronomy Series. Springer Science & Business Media. p. 151. ISBN 978-1-84628-199-0.

[Moore_Rees_2014-6] Moore, Patrick; Rees, Robin (2014). Patrick Moore's Data Book of Astronomy (2 ed.). Cambridge University Press. p. 50. ISBN 978-1-139-49522-6.

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