Andromeda
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Likely dwarf planet — the IAU has not ruled on it

Orcus

Open in OuranosCompare its size

On almost the same orbit as Pluto. Its moon Vanth is about half its size. Artist's impression: its surface hasn't been observed up close yet. This look is generated from many factors as a best guess at what it might look like, and will be updated as more data comes in.

Measured

Mean radius
455 km
From the Earth today
48.4 AU (7.24 billion km)

How far, from the Earth

48.4 AU. To cross it:

  • Light6 hours 42 minutes
  • Voyager 1's speed13.6 years
  • Driving at 100 km/h8,250 years

Voyager 1 at the speed it moved outward over the year to 2026-10-25 (JPL Horizons). Driving: nonstop, never refuelling.

Moons (1 in Ouranos)

Vanth

Where this comes from

  • Planets, Pluto, the Moon and Jupiter's big moons: astronomy-engine (Don Cross, MIT). Other moons: JPL Planetary Satellite Mean Elements. Ceres, Eris, Haumea, Makemake: JPL Small-Body Database. NASA/JPL-Caltech.

Every catalogue Ouranos draws is credited on the credits page.