Victa (crater)
 Victa, as imaged by Dawn on 19 December 2015 | |
| Feature type | Central-peak impact crater |
|---|---|
| Location | Ceres |
| Coordinates | 36°14′N 58°58′W / 36.23°N 58.96°W[1] |
| Diameter | 32 km[2]: 163 |
| Discoverer | Dawn |
| Eponym | Victa |
Victa is an impact crater on Ceres, a dwarf planet in the asteroid belt. It is roughly 32 kilometres (20 mi) in diameter, nearly the same size as the neighboring crater Abellio to its west.[2]: 163 It was named after Victa, the Roman goddess of food and nourishment. Its name was adopted by the International Astronomical Union (IAU) on 21 September 2015.[1]
Victa is located in the central region of the Fejokoo quadrangle. The region lies 2 kilometres (1.2 mi) below the average elevation of Ceres, and it represents the northernmost extension of a vast depression that dominates the Rongo quadrangle.[3]: 68 Victa and Abellio share compositional and structural similarities; Victa has a steep crater wall, with ridges and terraces on its crater floor and signs of mass wasting processes.[2]: 163 A small depression interrupts its southern rim, likely the remnants of a pre-existing impact crater. Compared to Abellio, Victa's crater floor is flatter since it formed entirely within the topographic depression, and its concentric terraces are much more irregularly spaced.[3]: 73 Both craters are ancient and have darker surfaces compared to the rest of the Fejokoo quadrangle,[2]: 163 though Victa is slightly brighter than Abellio.[3]: 73 Victa's surface spectrum suggests that its ground composition is similar to the average global composition of Ceres, though it is slightly depleted in hydroxide-bearing phyllosilicate minerals.[2]: 163
References
[edit]- ^ a b "Victa". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program. (Center Latitude: 36.23°, Center Longitude: 301.04°; Planetocentric, +East)
- ^ a b c d e Singh, S.; Combe, J. -P; McFadden, L. A.; et al. (January 2019). "Mineralogy mapping of the Ac-H-5 Fejokoo quadrangle of Ceres". Icarus. 318: 147–169. Bibcode:2019Icar..318..147S. doi:10.1016/j.icarus.2018.08.025.
- ^ a b c Hughson, K. H. G.; Russell, C. T.; Williams, D. A.; et al. (December 2018). "The Ac-5 (Fejokoo) quadrangle of Ceres: Geologic map and geomorphological evidence for ground ice mediated surface processes". Icarus. 316: 63–83. Bibcode:2018Icar..316...63H. doi:10.1016/j.icarus.2017.09.035.