442P
442P/McNaught
Not currently visible. Last report 1394 days ago at mag 26.6. Historic peak was mag 17.7. 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
26.6
Professional survey · COBS consensus
Confidence
33
Class E · priority 60
Observations
16
Arc unknown
Last observation
1394d ago
Tue, 22 Nov 2022 21:50:24 GMT · COBS consensus
Perihelion
2022-08-16
2.310 au
Peak window
2022-08-13 → 2022-09-12
COBS peak mag 17.7 on 2022-09-09 · perihelion 2022-08-16. Window is those dates ±3 days — not a light-curve fit.
Historic peak
17.7
COBS / analyzed peak 2022-09-09
Catalog ingest
11h ago
Venator last wrote this row 2026-09-16 13:20:19 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
2.310 au
e
0.5330
i
6.06°
Ω
31.70°
ω
311.00°
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
442P/McNaught
442P · 2026-09-14 18:28:01 UTC → current
Discoverers
Discoverer · parsed-name · 2026-09-14 18:28:01 UTC → current
Contributors
CCD Observer · HIL04 · 11 reports · last 1394d ago
CCD Observer · NOV01 · 4 reports · last 5381d ago
CCD Observer · PAP04 · 1 reports · last 1558d ago
Pips are observation weight on this object (log of report count). Hover for catalog-wide weight.