UPSA Object Registry
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161P/Hartley-IRAS

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
7.723 au
Eccentricity
0.8348
Inclination
95.69°
Orbital period
21.46 y

Also known as

3 identifiers

161P161P/Hartley-IRASHartley-IRAS

Orbit and body

JPL Small-Body Database · solution by Otto Matic
ClassHTC · near-Earth
Semi-major axis a7.723 au
Eccentricity e0.8348
Inclination i95.69°
Perihelion q / aphelion Q1.276 / 14.17 au
Period7,840 d (21.46 y)
Node Ω / argument ω / M1.41° / 47.08° / 33.95°
Earth MOID0.449 au
Absolute magnitude H—
Diameter— km
Albedo—
Rotation period— h
Spectral type—
Observation arc1983-11-04 → 2026-08-13 · 398 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/161p-hartley-iras · Registry entry updated 2026-08-14.