Seleucus (crater) explained

Coordinates:	21°N -66.6°W
Diameter:	61 km
Depth:	3.0 km
Colong:	67
Eponym:	Seleucus of Seleucia

Seleucus is a lunar impact crater located in the western part of Oceanus Procellarum. To the west is the lava-flooded remains of the walled plain Eddington. To the southwest is the crater Krafft and to the northwest lies Briggs.

The rim of Seleucus is well-formed, with a terraced inner rim and a slight rampart. The floor is relatively flat, with a small central peak. A bright ray from Glushko crater, about 500 km to the southwest, grazes the southeastern rim of Seleucus.

The narrowness of the rim of Seleucus and the abrupt contact between its raised rim and the surrounding mare prove that the final mare flooding occurred after the crater was formed, and so the crater is older than the youngest (uppermost) mare basalts in the vicinity.^[1]

Approximately 50 kilometers to the southeast of Seleucus, on the Oceanus Procellarum, is the landing site of the Soviet landing craft Luna 13.

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 Seleucus.

Seleucus	Latitude	Longitude	Diameter
A	22.0° N	60.5° W	6 km
E	22.4° N	63.9° W	4 km

See also

• 3288 Seleucus, minor planet

References

• Book: Andersson . L. E. . Whitaker . E. A. . Ewen Whitaker . 1982 . NASA Catalogue of Lunar Nomenclature . NASA RP-1097 .
• Web site: Blue . Jennifer . July 25, 2007 . Gazetteer of Planetary Nomenclature . . 2007-08-05 .
• Book: Bussey . B. . Ben Bussey . Spudis . P. . Paul Spudis . 2004 . The Clementine Atlas of the Moon . . New York . 978-0-521-81528-4 .
• Book: Cocks . Elijah E. . Cocks . Josiah C. . 1995 . Who's Who on the Moon: A Biographical Dictionary of Lunar Nomenclature . Tudor Publishers . 978-0-936389-27-1 .
• Web site: McDowell . Jonathan . July 15, 2007 . Lunar Nomenclature . . 2007-10-24 .
• Menzel. D. H.. Minnaert. M.. Levin. B.. Dollfus. A.. Bell. B.. Report on Lunar Nomenclature by the Working Group of Commission 17 of the IAU. 10.1007/BF00171763. Space Science Reviews. 12. 2. 136–186. 1971. 1971SSRv...12..136M. 122125855.
• Book: Moore , Patrick . Patrick Moore . 2001 . On the Moon . . 978-0-304-35469-6 .
• Book: Price , Fred W. . 1988 . The Moon Observer's Handbook . Cambridge University Press . 978-0-521-33500-3 .
• Book: Rükl , Antonín . Antonín Rükl . 1990 . Atlas of the Moon . . 978-0-913135-17-4 .
• Book: Webb , Rev. T. W. . Thomas William Webb . 1962 . Celestial Objects for Common Telescopes . 6th revised . Dover . 978-0-486-20917-3 .
• Book: Whitaker , Ewen A. . Ewen Whitaker . 1999 . Mapping and Naming the Moon . Cambridge University Press . 978-0-521-62248-6 .
• Book: Wlasuk , Peter T. . 2000 . Observing the Moon . Springer . 978-1-85233-193-1 .

Notes and References

1. https://history.nasa.gov/SP-362/contents.htm Apollo Over the Moon: A View from Orbit (online version)