141P-B
141P-B/Machholz
Difficult — CCD / large telescope. Around mag 14.9. A large amateur CCD or a professional telescope is required. Historic peak was mag 7.2.
Right ascension
10h 50m 45s
J2000
Declination
+07° 37′ 01″
J2000
Estimated magnitude
14.9
CCD / citizen telescope · COBS consensus
Confidence
33
Class E · priority 76
Observations
42
80.00 d arc
Last observation
8d ago
Tue, 08 Sep 2026 19:57:21 GMT · COBS consensus
Perihelion
2020-12-10
0.807 au
Peak window
2020-12-07 → 2020-12-19
COBS peak mag 7.2 on 2020-12-16 · perihelion 2020-12-10. Window is those dates ±3 days — not a light-curve fit.
Historic peak
7.2
COBS / analyzed peak 2020-12-16
Catalog ingest
13m ago
Venator last wrote this row 2026-09-16 22:00:04 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
0.807 au
e
0.7360
i
14.00°
Ω
154.00°
ω
242.00°
a
3.060 au
MOID
—
H
—
H0 / n
9.0 / 4
NEO score
—
PHA score
—
RMS
—
Elongation
13°
Reporting sources
COBS comet list
okComet Observation Database magnitudes and perihelion data for the full COBS list (active and inactive).
COBS orbits
okOsculating elements and photometric parameters (H0, n) for active comets.
Name history
141P-B/Machholz
141P-B · 2026-09-08 02:09:56 UTC → current
Discoverers
Discoverer · parsed-name · 2026-09-08 17:27:23 UTC → current
Contributors
CCD Observer · JAE · 3 reports · last 2072d ago
Visual Observer · JAE · 1 reports · last 2085d ago
Pips are observation weight on this object (log of report count). Hover for catalog-wide weight.