UPSA Object Registry
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128P/Shoemaker-Holt 1-B

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.
Diameter
4.6 km
Semi-major axis
4.489 au
Eccentricity
0.3213
Inclination
4.36°
Orbital period
9.5 y

Also known as

3 identifiers

128P-B128P/Shoemaker-Holt 1-BShoemaker-Holt

Orbit and body

JPL Small-Body Database · solution by Davide Farnocchia
ClassJFc
Semi-major axis a4.489 au
Eccentricity e0.3213
Inclination i4.36°
Perihelion q / aphelion Q3.047 / 5.93 au
Period3,470 d (9.5 y)
Node Ω / argument ω / M214.53° / 210.22° / 355.2°
Earth MOID2.06 au
Absolute magnitude H—
Diameter4.6 km
Albedo—
Rotation period— h
Spectral type—
Observation arc1996-09-16 → 1999-04-16 · 236 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/128p-shoemaker-holt-1-b · Registry entry updated 2026-08-14.