298P
298P/Christensen
Not currently visible. Last report 6740 days ago at mag 21.9. Historic peak was mag 19.8. 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
21.9
Professional survey · COBS consensus
Confidence
33
Class E · priority 60
Observations
2
Arc unknown
Last observation
6740d ago
Fri, 04 Apr 2008 09:36:00 GMT · COBS consensus
Perihelion
2027-06-24
2.200 au
Peak window
2027-01-20 → 2027-06-27
COBS peak mag 19.8 on 2027-01-23 · perihelion 2027-06-24. Window is those dates ±3 days — not a light-curve fit.
Historic peak
19.8
COBS / analyzed peak 2027-01-23
Catalog ingest
7m ago
Venator last wrote this row 2026-09-16 23:00:05 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
2.200 au
e
0.3870
i
7.87°
Ω
52.80°
ω
101.00°
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
298P/Christensen
298P · 2026-09-14 18:27:56 UTC → current
Discoverers
Discoverer · parsed-name · 2026-09-14 18:27:56 UTC → current
Contributors
Visual Observer · SEA · 2 reports · last 6740d ago
Pips are observation weight on this object (log of report count). Hover for catalog-wide weight.