kuiper object
Orcus
A resonant companion to Pluto's orbital family.
Orcus occupies a 2:3 resonance with Neptune and has a large moon, Vanth.
- Orbit representation
- verified fallback
- Surface
- procedural reconstruction
Reference measurements
The numbers that shape this world
- Mean radius
- 455 km
- Semi-major axis
- 39.17 AU
- Orbital period
- 245.149 Earth yearsKeplerian estimate from the catalogued semi-major axis.
- Eccentricity
- 0.227
- Inclination
- 20.59°
- Visual geometry
- sphere
Orbital character
An orbit lifted well beyond the planetary plane
Orcus follows a catalogued path with a 39.17 AU semi-major axis, eccentricity 0.227, and 20.59° inclination. The resulting two-body period estimate is 245.149 Earth years; the representation notes below state the source epoch and precision boundary used by Explore.
Catalogue context
Orcus among its nearest Helios peers
Orcus is linked with Pluto, Eris, Haumea, Makemake, Quaoar, Gonggong, Sedna inside the Helios outer-system selection. The grouping keeps adjacent reading coherent; it does not imply that these bodies share the same composition, origin, or present physical state.
Representation notes
What Explore is showing
A bundled frozen six-element preview preserves the documented body scope. It was not freshly re-fetched from SBDB in this build environment and must not be presented as an accurate or current ephemeris.
Reference-guided visual reconstruction based on cited mission records; no source raster is reproduced.
Provenance