UPSA Object Registry
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18D/Perrine-Mrkos

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
3.56 au
Eccentricity
0.6426
Inclination
17.76°
Orbital period
6.708 y

Also known as

3 identifiers

18D18D/Perrine-MrkosPerrine-Mrkos

Orbit and body

JPL Small-Body Database · solution by M.S.W. Keesey
ClassJFc · near-Earth
Semi-major axis a3.56 au
Eccentricity e0.6426
Inclination i17.76°
Perihelion q / aphelion Q1.272 / 5.85 au
Period2,450 d (6.708 y)
Node Ω / argument ω / M240.88° / 166.05° / 11.51°
Earth MOID0.289 au
Absolute magnitude H—
Diameter— km
Albedo—
Rotation period— h
Spectral type—
Observation arc1961-11-29 → 1968-12-26 · 16 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/18d-perrine-mrkos · Registry entry updated 2026-08-14.