Porter (Martian crater)
Porter crater rim, as seen with Mars Global Surveyor.
|Eponym||Russell W. Porter|
Porter is a large-scale impact crater in the Thaumasia quadrangle on the planet Mars, situated in Aonia Terra at 50.8° south and 113.9º west. The impact caused a bowl 105 kilometres (65 mi) across. The name was chosen in 1973 by the International Astronomical Union in honour of the US astronomer and explorer, Russell W. Porter (1871-1949).
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. The peak is caused by a rebound of the crater floor following the impact.
Porter Crater, as seen by CTX camera (on Mars Reconnaissance Orbiter). Gullies are visible in the upper left.
- Climate of Mars
- Geology of Mars
- List of craters on Mars
- Martian gullies
- Ore resources on Mars
- Planetary nomenclature
- Water on Mars
- Hugh H. Kieffer (1992). Mars. University of Arizona Press. ISBN 978-0-8165-1257-7. Retrieved 7 March 2011.