UPSA Object Registry
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90377 Sedna

Dwarf planet
harvesting The full record is being pulled from the archives right now — measurement tables, the Gaia row, catalogue photometry. This page will fill itself in.
Absolute magnitude H
1.5
Semi-major axis
543.7 au
Eccentricity
0.8599
Inclination
11.93°
Orbital period
1.268e+04 y
Rotation period
10.27 h

Also known as

4 identifiers

9037790377 Sedna (2003 VB12)90377 SednaSedna

Orbit and body

JPL Small-Body Database · solution by Otto Matic
ClassTNO
Semi-major axis a543.7 au
Eccentricity e0.8599
Inclination i11.93°
Perihelion q / aphelion Q76.185 / 1,011.2 au
Period4.63e+06 d (1.268e+04 y)
Node Ω / argument ω / M144.51° / 311.1° / 358.6°
Earth MOID75.2 au
Absolute magnitude H1.5
Diameter— km
Albedo—
Rotation period10.273 h
Spectral type—
Observation arc1990-09-25 → 2026-02-27 · 671 observations

Provenance

where this card came from
ArchiveRead at (UTC)Record
Seeded from the bulk archive load; no per-object fetch yet.

Machine-readable: /api/v1/object/90377-sedna · Registry entry updated 2026-08-14.