P/2000 C1
Visibility unknown. No recent magnitude. Large facilities may still recover it if an ephemeris exists.
Right ascension
—
J2000
Declination
—
J2000
Estimated magnitude
—
Unknown · COBS consensus
Confidence
33
Class E · priority 56
Observations
1
Arc unknown
Last observation
9765d ago
Fri, 11 Feb 2000 18:14:23 GMT · COBS consensus
Perihelion
—
—
Peak window
2000-02-11
COBS published peak mag 17.1. Perihelion not in the catalog yet.
Historic peak
17.1
COBS / analyzed peak 2000-02-11
Catalog ingest
14h ago
Venator last wrote this row 2026-11-06 14:20:25 UTC
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.
q
—
e
—
i
—
Ω
—
ω
—
a
—
MOID
—
H
—
H0 / n
—
NEO score
—
PHA score
—
RMS
—
Elongation
—
COBS comet list
okComet Observation Database magnitudes and perihelion data for the full COBS list (active and inactive).
P/2000 C1 (HERGENROTHER)
Informal: HERGENROTHER
P/2000 C1 · 2026-09-14 18:28:03 UTC → current
Discoverer · parsed-name · 2026-09-14 18:28:03 UTC → current
Seiichi Yoshida and KenIchi Kadota
CCD Observer · YOS05 · 1 reports · last 9765d ago
Pips are observation weight on this object (log of report count). Hover for catalog-wide weight.