Astronomy:Catalán (crater)
 Lunar Orbiter 4 image | |
| Diameter | 25 km |
|---|---|
| Depth | Unknown |
| Colongitude | 88° at sunrise |
Catalán is a small lunar impact crater that lies almost along the southwest limb of the Moon. At this position the crater is ill-suited for observation from the Earth as it is viewed almost from the side, and visibility is subject to libration effects. It lies to the west of the somewhat larger crater Baade, and south-southeast of Graff. This region is located in the outer southeastern part of the skirt of ejecta that surrounds the Mare Orientale impact basin, and the nearby surface is rugged and streaky. This crater is named after the Spanish scientist Miguel Antonio Catalán Sañudo (1894–1957) for his contributions to spectroscopy, an important exploratory tool in astronomy.
This is a somewhat irregular crater, although in general form it is circular. The rim is sharp-edged and displays little appearance of erosion. Sections of the inner wall appear to have slumped along the north and southeast, forming notches in the rim. The interior floor is rough and irregular, with no central peak of note.
Due west of Catalán, the satellite craters Catalán A and the smaller Catalán B form a joined pair, with each having a sharp rim and a bowl-shaped interior. To the northwest of Catalán A is the nearly symmetrical, bowl-shaped Catalán U.
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 Catalán.
| Catalán | Latitude | Longitude | Diameter |
|---|---|---|---|
| A | 45.7° S | 89.2° W | 21 km |
| B | 45.6° S | 88.4° W | 14 km |
| U | 45.1° S | 90.6° W | 20 km |
References
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- Blue, Jennifer (July 25, 2007). "Gazetteer of Planetary Nomenclature". USGS. http://planetarynames.wr.usgs.gov/.
- Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 978-0-521-81528-4.
- 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. https://archive.org/details/isbn_9780936389271.
- McDowell, Jonathan (July 15, 2007). "Lunar Nomenclature". Jonathan's Space Report. http://host.planet4589.org/astro/lunar/.
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- 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.
- Webb, Rev. T. W. (1962). Celestial Objects for Common Telescopes (6th revised ed.). Dover. ISBN 978-0-486-20917-3. https://archive.org/details/celestialobjects00webb.
- Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. ISBN 978-0-521-62248-6.
- Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 978-1-85233-193-1.
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