View source for Astronomy:Koga (crater)

{{short description|Crater on Mars}}
{{Infobox crater data
| titlecolor  = #FA8072
| title       = Koga
| image       = Martian impact crater Koga based on day THEMIS.png
| caption     = Crater Koga based on [[Engineering:Thermal Emission Imaging System|THEMIS]] day-time image
| coordinate_title = [[Astronomy:Mars#Geography|Coordinates]]
| globe       = Mars
| coordinates = {{coord|29.3|S|103.8|W|globe:mars_type:landmark|display=inline,title}}
| diameter    = 19 km
| eponym      = Koga, Tanzania
}}

'''Koga''' is an [[Astronomy:Impact crater|impact crater]] on [[Astronomy:Mars|Mars]], approximately 19 kilometers in diameter. It is located at 29.3°S, 103.8°W, north of the crater [[Astronomy:Virrat (crater)|Virrat]] and northeast of the crater [[Astronomy:Dinorwic (crater)|Dinorwic]]. To the north is the crater [[Astronomy:Nhill (crater)|Nhill]]. It is named after a town in Tanzania, and its name was approved by the [[Organization:International Astronomical Union|International Astronomical Union]] in 1991.<ref>{{gpn|3070}}</ref><ref name="a">''NASA World Wind'' 1.4. NASA Ames Research Center, 2007.</ref> According to a surface age map of Mars based on US Geological Survey data, the area around Koga is from the [[Astronomy:Noachian epoch|Noachian epoch]], which places the area's age at 3.8 to 3.5 billion years ago.<ref>{{cite web |
 title=INTEGRATING GLOBAL-SCALE MISSION DATASETS – UNDERSTANDING THE MARTIAN CRUST | 
 work=lpi.usra.edu |
 url=http://www.lpi.usra.edu/meetings/lpsc2005/pdf/1853.pdf |
 access-date=October 23, 2007 }}</ref> Sharp blocks and cliffs poke through a mantle of fine material located at the bottom of the crater.<ref>{{cite web |
 title=THEMIS Image of the Day: Koga Crater (Released 18 August 2003) | 
 work=themis.asu.edu |
 url=http://themis.asu.edu/zoom-20030818a |
 access-date=October 23, 2007 }}</ref> At the deepest part of the crater, it is about 5,200 meters in elevation above zero altitude, and its rim averages about 6,400 meters above zero altitude. It is therefore approximately 1.2 kilometers deep.<ref name="a"/>

== References ==
{{Reflist}}

{{Geography of Mars}}

[[Category:Impact craters on Mars]]
[[Category:Phoenicis Lacus quadrangle]]



{{Sourceattribution|Koga (crater)}}