Pharos (crater)
A full-disc image of Proteus from the Voyager 2 spacecraft, with Pharos occupying much of the upper right | |
| Feature type | Impact crater Possible peak-ring impact basin |
|---|---|
| Location | Proteus |
| Coordinates | 10°0′S 10°0′W / 10.000°S 10.000°W |
| Diameter | 255±12 km (Croft 1992): 409 230 km (Stooke 1994): 47 |
| Depth | ~10 km (6.2 mi) |
| Discoverer | Voyager 2 |
| Eponym | Island of Pharos |
Pharos (/ˈfɛərɒs/ FAIR-oss) is the largest known impact crater on Neptune's moon Proteus. It is named after the island of Pharos, making it the only named surface feature on Proteus as of 2024. It measures 10–15 km deep and has a diameter of around 250 km (160 mi), making it more than half the diameter of Proteus itself. Debris ejected from the impact that created Pharos may have formed Hippocamp, a small moon whose orbit is unusually close to Proteus's.