# Orcus

*In the Solar System*

A large Kuiper belt object on almost exactly Pluto's orbit - the same 2:3 lock with Neptune, the same tilt, the same period - but on the opposite side of it, which is why it is sometimes called the anti-Pluto. It is here for its size. Its moon Vanth is unusually large next to it, closer to a double body than to a planet with a satellite, and its surface carries water ice, which means something has resurfaced it.

| | |
| --- | --- |
| Radius | 455 km |
| Around the equator | 2,859 km |
| From the Sun | 7,177,870,717 km (-10,090 km/d) |
| From the Earth | 7,319,151,566 km (+120,425 km/d) |
| A signal takes | 6 h 47 m |

Distances and speed are computed from JPL Horizons trajectories and are true of 2026-09-05, changing at the rate given beside each. The interpolation itself is good to a few kilometres; what ages these figures is the date, not the arithmetic.

## Elsewhere

- On the live map: https://www.orbitalmap.space/?world=solar-system&focus=orcus
- This object as a page: https://www.orbitalmap.space/o/orcus/
- Every object: https://www.orbitalmap.space/o/
- What this site is and what it reads: https://www.orbitalmap.space/llms.txt