158P
158P/Kowal-LINEAR
Not currently visible. Last report 659 days ago at mag 20.8. Historic peak was mag 19.2. 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
20.8
Professional survey · COBS consensus
Confidence
33
Class E · priority 60
Observations
47
Arc unknown
Last observation
659d ago
Wed, 27 Nov 2024 00:43:12 GMT · COBS consensus
Perihelion
2022-11-08
5.120 au
Peak window
2022-09-13 → 2022-11-11
COBS peak mag 19.2 on 2022-09-16 · perihelion 2022-11-08. Window is those dates ±3 days — not a light-curve fit.
Historic peak
19.2
COBS / analyzed peak 2022-09-16
Catalog ingest
13m ago
Venator last wrote this row 2026-09-16 22:00:03 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
5.120 au
e
0.1120
i
7.51°
Ω
124.00°
ω
237.00°
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
158P/Kowal-LINEAR
158P · 2026-09-14 18:27:52 UTC → current
Discoverers
Discoverer · parsed-name · 2026-09-15 18:25:24 UTC → current
Discoverer · parsed-name · 2026-09-15 18:25:24 UTC → current
Discoverer · parsed-name · 2026-09-15 18:25:24 UTC → current
Discoverer · parsed-name · 2026-09-14 18:27:52 UTC → 2026-09-15 18:25:24 UTC
Contributors
CCD Observer · HIL04 · 39 reports · last 659d ago
CCD Observer · NAK01 · 3 reports · last 8246d ago
CCD Observer · NOV01 · 2 reports · last 5498d ago
CCD Observer · TSU02 · 2 reports · last 8276d ago
CCD Observer · ORI · 2 reports · last 4207d ago
Visual Observer · HAE · 1 reports · last 5465d ago
CCD Observer · PAP04 · 1 reports · last 1993d ago
CCD Observer · MAI01 · 1 reports · last 1038d ago
CCD Observer · SHU · 1 reports · last 5936d ago
Pips are observation weight on this object (log of report count). Hover for catalog-wide weight.