UPSA Object Registry
Registry · solar system

123P/West-Hartley

Comet
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.
Semi-major axis
3.86 au
Eccentricity
0.4491
Inclination
15.36°
Orbital period
7.584 y
Rotation period
3.7 h

Also known as

3 identifiers

123P123P/West-HartleyWest-Hartley

Orbit and body

JPL Small-Body Database · solution by Shantanu Naidu
ClassJFc
Semi-major axis a3.86 au
Eccentricity e0.4491
Inclination i15.36°
Perihelion q / aphelion Q2.126 / 5.59 au
Period2,770 d (7.584 y)
Node Ω / argument ω / M46.5° / 102.98° / 263.72°
Earth MOID1.2 au
Absolute magnitude H—
Diameter— km
Albedo—
Rotation period3.7 h
Spectral type—
Observation arc2010-09-12 → 2026-05-17 · 3,587 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/123p-west-hartley · Registry entry updated 2026-08-14.