UPSA Object Registry
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12P/Pons-Brooks

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
17.18 au
Eccentricity
0.9546
Inclination
74.19°
Orbital period
71.18 y

Also known as

3 identifiers

12P12P/Pons-BrooksPons-Brooks

Orbit and body

JPL Small-Body Database · solution by Davide Farnocchia
ClassHTC · near-Earth
Semi-major axis a17.18 au
Eccentricity e0.9546
Inclination i74.19°
Perihelion q / aphelion Q0.781 / 33.59 au
Period26,000 d (71.18 y)
Node Ω / argument ω / M255.86° / 198.99° / 357.09°
Earth MOID0.18 au
Absolute magnitude H—
Diameter— km
Albedo—
Rotation period— h
Spectral type—
Observation arc1953-06-20 → 2025-06-07 · 8,059 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/12p-pons-brooks · Registry entry updated 2026-08-14.