Lockyer (Martian crater)
Lockyer is a crater in the Elysium quadrangle of Mars, located at 28° North and 199.5° West. It is 71 km in diameter and was named after Norman Lockyer, a British astronomer (1836-1920).[1] Lockyer is fairly easy to spot on Mars maps because it sits in the relatively young northern hemisphere, where there are few craters. It is close to Elysium Mons and Hecates Tholus, two large volcanoes.
 Location of Lockyer Crater | |
| Planet | Mars |
|---|---|
| Coordinates | 28°N 199.5°W |
| Diameter | 71 km |
| Eponym | Norman Lockyer, British astronomer (1836-1920). |
Impact craters generally have a rim with ejecta around them, in contrast volcanic craters usually do not have a rim or ejecta deposits. As craters get larger (greater than 10 km in diameter) they usually have a central peak.[2] The peak is caused by a rebound of the crater floor following the impact.[3]
Lockyer, as seen by CTX camera (on Mars Reconnaissance Orbiter).
Lockyer's central hills, as seen by HiRISE.
Layers in Lockyer, as seen by HiRISE under the HiWish program.
Map of Elysium quadrangle. Elysium Mons and Albor Tholus are large volcanoes. The crater Lockyer is at the top of the map.
See also
References
- "Lockyer". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
- http://www.lpi.usra.edu/publications/slidesets/stones/
- Hugh H. Kieffer (1992). Mars. University of Arizona Press. ISBN 978-0-8165-1257-7. Retrieved 7 March 2011.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.