UPSA Object Registry
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100P/Hartley 1

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
3.428 au
Eccentricity
0.4138
Inclination
25.58°
Orbital period
6.352 y

Also known as

3 identifiers

100P100P/Hartley 1Hartley

Orbit and body

JPL Small-Body Database · solution by Otto Matic
ClassJFc
Semi-major axis a3.428 au
Eccentricity e0.4138
Inclination i25.58°
Perihelion q / aphelion Q2.01 / 4.85 au
Period2,320 d (6.352 y)
Node Ω / argument ω / M37.76° / 181.87° / 303.15°
Earth MOID1 au
Absolute magnitude H—
Diameter— km
Albedo—
Rotation period— h
Spectral type—
Observation arc1985-06-13 → 2022-08-15 · 644 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/100p-hartley-1 · Registry entry updated 2026-08-14.