Sedna in 3D: live position and orbit

One of the most distant and coldest known objects in the Solar System, journeying on an extremely elongated, multi-millennial orbit that carries it beyond the Kuiper Belt toward the inner edge of the hypothesized Oort Cloud.Sedna is shown at its real position, computed from NASA/JPL ephemeris data. The view opens on Sedna; you can travel in time, switch between the educational overview and the true-scale voyage, and compare it with every other body of the solar system.

Radius

498 km (± 8 %)¹ (derived value)

Mean distance from the Sun

506.448 AU² (derived value)

Orbital period

4 160 150 days² (derived value)

Synodic rotation

10.27 hours³

Known moons

0 (as of October 2026)³

Sources

Pál et al., "TNOs are Cool": A survey of the trans-Neptunian region, VII. Size and surface characteristics of (90377) Sedna and 2010 EK139. Astronomy & Astrophysics. 2012. read 2026-09-17. https://arxiv.org/abs/1204.0899

NASA JPL Solar System Dynamics, Horizons System (osculating orbital elements). read 2026-09-17. https://ssd.jpl.nasa.gov/horizons/

NASA JPL Solar System Dynamics, Small-Body Database. read 2026-09-17. https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html

3D Solar System

Galaxy

01 / 06 Initializing...

Display settings

In the scene

Preset

A column header sets the whole column, a group row its group, a row one object. Spacecraft and interstellar objects start hidden.

What the scene shows, object by object
Object	Label	Object	Orbit

Asteroid and comet field

Drawn in Exploration mode, one dot per known orbit.

Rendering

Accessibility and units

Offline use

Download every ephemeris file so the app can place the bodies at any date without a network. Nothing is downloaded until you ask.

Navigation

Drag orbit the view
Scroll · pinch zoom in / out
Click a body or its label to travel to it
Educ · Explo compressed overview vs true-scale voyage
Clock · date scroll to time-travel, tap to pick
Space play / pause time
/ search a body
T back to now
F full screen
M switch Educ / Explo
? show this help

Textures: USGS Astrogeology / NASA-JPL (public domain) · Solar System Scope (CC BY 4.0) · NOAA ETOPO 2022 · Halley, Itokawa, Gaspra, Ida: Philip Stooke / NASA PDS · Ryugu: ISAS/JAXA Hayabusa2 ONC (modified) · Lutetia, 67P: ESA/Rosetta OSIRIS, ESA, H. Sierks (CC BY-NC 3.0 IGO, modified).
Illustrative surfaces: Bodies never mapped globally have an illustrative texture, not a scientific map; the body card says so, and Sources lists them.
3D shape models: NASA PDS: NEAR (Eros), Hayabusa (Itokawa), Galileo (Ida, Gaspra) · ISAS/JAXA: Hayabusa2 (Ryugu) · NASA/Goddard SVS: OSIRIS-REx (Bennu)
Data: Astronomy Engine · NASA/JPL Horizons · JPL SBDB · NASA GIBS · NOAA NCEP GFS · NASA Planetary Data System (mission context products) · IAU Gazetteer of Planetary Nomenclature · Open-Meteo.com (CC BY 4.0) · ERA5, Copernicus Climate Change Service (ECMWF)