P/2009 SK280
P/2009 SK280 (Spacewatch-Hill)
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
2
Arc unknown
Last observation
1303d ago
Fri, 14 Apr 2023 01:49:00 GMT · COBS consensus
Perihelion
—
—
Peak window
2021-11-02
COBS published peak mag 20.3. Perihelion not in the catalog yet.
Historic peak
20.3
COBS / analyzed peak 2021-11-02
Catalog ingest
14h ago
Venator last wrote this row 2026-11-06 14:20:18 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
—
e
—
i
—
Ω
—
ω
—
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
P/2009 SK280 (Spacewatch-Hill)
Informal: Spacewatch-Hill
P/2009 SK280 · 2026-09-14 18:27:53 UTC → current
Discoverers
Discoverer · parsed-name · 2026-09-16 13:20:16 UTC → current
Discoverer · parsed-name · 2026-09-16 13:20:16 UTC → current
Discoverer · parsed-name · 2026-09-16 13:20:16 UTC → current
Discoverer · parsed-name · 2026-09-14 18:27:53 UTC → 2026-09-16 13:20:16 UTC
Contributors
CCD Observer · PAP04 · 1 reports · last 1831d ago
CCD Observer · MAI01 · 1 reports · last 1303d ago
Pips are observation weight on this object (log of report count). Hover for catalog-wide weight.