Astronomy:Nereus (crater)

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Nereus crater Mars (Opportunity) 2009-09-19.png
Coordinates [ ⚑ ] : 2°06′55″S 5°31′16″W / 02.115303°S 05.521192°W / -02.115303; -05.521192
DiameterAbout 10 metres (33 ft)

Nereus is a small impact crater lying situated within the Margaritifer Sinus quadrangle (MC-19) region of the planet Mars with a diameter of about 10 metres (33 ft).[1] It is located just south of the planet's equator[2] on the relatively smooth Meridiani Planum (plain).[3]

It was discovered by the Opportunity Mars rover on Sol 2010 (2009-09-19), being noticed because it is surrounded by jagged rocks, and was the Astronomy Picture of the Day for 2009-10-19.

It is named for Nereus, a Greek god who lived with the Nereids in the Aegean Sea.[4]

See also


  1. Nemiroff, R.; Bonnell, J., eds (October 19, 2009). "Nereus Crater on Mars". Astronomy Picture of the Day. NASA. 
  2. Google Mars KML file tracing Opportunity's route (includes coordinates), Tesheiner,, 2009.
  3. Panorama of Nereus crater, hortonheardawho, Flickr, 2009-10-14.
  4. Hesiod, Theogony 233-36, is unequivocal that Nereus is the Old Man of the Sea (ἅλιος γέρων), whereas the Odyssey refers the sobriquet to Nereus (xxiv.58) to Proteus (iv.365, 387), and to Phorkys (xiii.96, 345).

External links