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

Quaoar

Open in OuranosCompare its size

A likely dwarf planet whose ring lies far outside the distance where a ring should clump into a moon (Morgado et al. 2023). 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
555 km
From the Earth today
43.3 AU (6.47 billion km)

How far, from the Earth

43.3 AU. To cross it:

  • Light6 hours
  • Voyager 1's speed12.2 years
  • Driving at 100 km/h7,380 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)

Weywot

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.