475P
475P/Spacewatch-LINEAR
Not currently visible. Last report 940 days ago at mag 22.5. Historic peak was mag 19.6. 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
22.5
Professional survey · COBS consensus
Confidence
33
Class E · priority 60
Observations
6
Arc unknown
Last observation
940d ago
Tue, 20 Feb 2024 04:18:00 GMT · COBS consensus
Perihelion
2024-06-02
4.080 au
Peak window
2024-03-19 → 2024-06-05
COBS peak mag 19.6 on 2024-03-22 · perihelion 2024-06-02. Window is those dates ±3 days — not a light-curve fit.
Historic peak
19.6
COBS / analyzed peak 2024-03-22
Catalog ingest
11h ago
Venator last wrote this row 2026-09-16 13:20:20 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
4.080 au
e
0.4430
i
14.50°
Ω
147.00°
ω
40.50°
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
475P/Spacewatch-LINEAR
475P · 2026-09-14 18:28:02 UTC → current
Discoverers
Discoverer · parsed-name · 2026-09-16 13:20:20 UTC → current
Discoverer · parsed-name · 2026-09-16 13:20:20 UTC → current
Discoverer · parsed-name · 2026-09-16 13:20:20 UTC → current
Discoverer · parsed-name · 2026-09-14 18:28:02 UTC → 2026-09-16 13:20:20 UTC
Contributors
CCD Observer · NAK01 · 3 reports · last 8184d ago
CCD Observer · PAP04 · 2 reports · last 967d ago
CCD Observer · MAI01 · 1 reports · last 940d ago
Pips are observation weight on this object (log of report count). Hover for catalog-wide weight.