331P
331P/Gibbs
Not currently visible. Last report 437 days ago at mag 18.8. Typical backyard telescopes will not show it. HST, JWST, or an 8–10 m class telescope might recover it with a good ephemeris.
Right ascension
—
J2000
Declination
—
J2000
Estimated magnitude
18.8
Professional survey · COBS consensus
Confidence
33
Class E · priority 60
Observations
2
Arc unknown
Last observation
437d ago
Wed, 27 Aug 2025 05:42:00 GMT · COBS consensus
Perihelion
2025-12-28
2.880 au
Peak window
2025-10-20 → 2025-12-31
COBS peak mag 18.0 on 2025-10-23 · perihelion 2025-12-28. Window is those dates ±3 days — not a light-curve fit.
Historic peak
18.0
COBS / analyzed peak 2025-10-23
Catalog ingest
5m ago
Venator last wrote this row 2026-11-07 04:25:24 UTC
Light curve
Brightness over time (V mag)
Gold = reported observations. Steel dashed family = ensemble (nominal / outburst / fade / disruption).
Tail length
Converted to degrees from COBS (d / arcmin / arcsec). Empty until analysis has pulled the archive.
No tail measures stored yet for this object.
Ensemble is a first-pass H0/n photometric model plus observed samples — not a trained ML forecast yet. The background analyzer walks the catalog one object at a time so COBS is not flooded. Disruption track rises after perihelion to stand in for solar-wind stripping.
Orbital elements
q
2.880 au
e
0.0418
i
9.74°
Ω
217.00°
ω
186.00°
a
—
MOID
—
H
—
H0 / n
—
NEO score
—
PHA score
—
RMS
—
Elongation
—
Reporting sources
COBS comet list
okComet Observation Database magnitudes and perihelion data for the full COBS list (active and inactive).
Name history
331P/Gibbs
331P · 2026-09-13 22:21:23 UTC → current
Discoverers
Discoverer · parsed-name · 2026-09-13 22:21:23 UTC → current
Contributors
CCD Observer · PAP04 · 1 reports · last 1797d ago
CCD Observer · MAI01 · 1 reports · last 437d ago
Pips are observation weight on this object (log of report count). Hover for catalog-wide weight.