490P
490P/ATLAS
Not currently visible. Last report 2515 days ago at mag 31.2. Historic peak was mag 22.0. 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
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J2000
Estimated magnitude
31.2
Professional survey · COBS consensus
Confidence
33
Class E · priority 60
Observations
8
Arc unknown
Last observation
2515d ago
Mon, 28 Oct 2019 22:19:11 GMT · COBS consensus
Perihelion
2024-09-28
1.070 au
Peak window
2024-09-25 → 2024-10-06
COBS peak mag 22.0 on 2024-10-03 · perihelion 2024-09-28. Window is those dates ±3 days — not a light-curve fit.
Historic peak
22.0
COBS / analyzed peak 2024-10-03
Catalog ingest
12h 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
1.070 au
e
0.6470
i
12.30°
Ω
308.00°
ω
333.00°
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
490P/ATLAS
490P · 2026-09-14 18:28:02 UTC → current
Discoverers
Discoverer · parsed-name · 2026-09-14 18:28:02 UTC → current
Contributors
CCD Observer · HIL04 · 6 reports · last 2515d ago
CCD Observer · MAS01 · 2 reports · last 2603d ago
Pips are observation weight on this object (log of report count). Hover for catalog-wide weight.