Veneneia
| Veneneia | |
 Vestas södra halvklot, med kratern Veneneia | |
| Himlakropp | Vesta |
|---|---|
| Koordinater | 47°56′S 305°41′V / 47.93°S 305.68°V |
| Diameter | 400 km |
| Upptäckare | Dawn |
| Uppkallad efter | Venēneia[1] |
Veneneia är den nästa största kratern på asteroiden 4 Vesta, vid latitud 52°S. Med sina 395 km[2] i diameter mäter den 70 procent av asteroidens ekvatorialdiameter, och är en av de största kratrarna i solsystemet. Kratern är åtminstone 2 miljarder år gammal och har delvis utplånats av den yngre och ännu större kratern Rheasilvia.[3]
Veneneia upptäcktes 2011 av rymdsonden Dawn. Den är uppkallad efter Venēneia, en av de ursprungliga vestalerna.[1]
Referenser
- ^ [a b] Blue, Jennifer. "Veneneia". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
- ^ 'Vesta seems more planet than asteroid' Arkiverad 1 juni 2012 hämtat från the Wayback Machine., Science News, 2012 Mar 22
- ^ ”EXPLORATION OF SATURNALIA FOSSA AND ASSOCIATED STRUCTURES IN VESTA'S NORTHERN HEMISPHERE” (på engelska). Arkiverad från originalet den 3 februari 2014. https://web.archive.org/web/20140203074541/https://gsa.confex.com/gsa/2012AM/finalprogram/abstract_209151.htm. Läst 13 augusti 2020.
Media som används på denna webbplats
Asteroid 4 Vesta from Dawn on July 17, 2011. The image was taken from a distance of 9,500 miles (15,000 km) away from Vesta.
Image PIA15665. Original caption:
South Polar Impacts This topographic map from NASA's Dawn mission shows the two large impact basins in the southern hemisphere of the giant asteroid Vesta. The map is color-coded by elevation, with red showing the higher areas and blue showing the lower areas. Rheasilvia, the largest impact basin on Vesta, is 310 miles (500 kilometers) in diameter. Scientists estimate that it formed 1 billion years ago by counting the number of smaller craters that have formed on top of it. The other basin, Veneneia, is 250 miles (400 kilometers) across and lies partially beneath Rheasilvia. Scientists estimate that Veneneia is at least 2 billion years old.
The topography was derived from images taken by Dawn's framing camera during Dawn's high-altitude mapping orbit, which averaged about 420 miles (680 kilometers) in altitude and took place from Sept. 30 to Nov. 2, 2011. The resolution during that orbit was about 200 feet (60 meters) per pixel.