UPSA Object Registry
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1009 Sirene

Asteroid
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
14.16
Semi-major axis
2.629 au
Eccentricity
0.453
Inclination
15.71°
Orbital period
4.271 y
Rotation period
2.879 h

Also known as

4 identifiers

10091009 Sirene (A923 UE)1009 SireneSirene

Orbit and body

JPL Small-Body Database · solution by Otto Matic
ClassMCA
Semi-major axis a2.629 au
Eccentricity e0.453
Inclination i15.71°
Perihelion q / aphelion Q1.438 / 3.82 au
Period1,560 d (4.271 y)
Node Ω / argument ω / M229.26° / 186.65° / 31.65°
Earth MOID0.449 au
Absolute magnitude H14.16
Diameter— km
Albedo—
Rotation period2.8791 h
Spectral type—
Observation arc1923-10-31 → 2026-04-11 · 8,870 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/1009-sirene · Registry entry updated 2026-08-14.