C/2022 A3
C/2022 A3 (Lemmon-ATLAS)
Not currently visible. Last report 1280 days ago at mag 22.7. Historic peak was mag 16.6. 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
22.7
Professional survey · COBS consensus
Confidence
33
Class E · priority 60
Observations
43
Arc unknown
Last observation
1280d ago
Sat, 06 May 2023 21:36:00 GMT · COBS consensus
Perihelion
2023-09-29
3.710 au
Peak window
2023-09-26 → 2023-12-15
COBS peak mag 16.6 on 2023-12-12 · perihelion 2023-09-29. Window is those dates ±3 days — not a light-curve fit.
Historic peak
16.6
COBS / analyzed peak 2023-12-12
Catalog ingest
13h ago
Venator last wrote this row 2026-11-06 14:20:23 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.
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
3.710 au
e
0.9960
i
88.40°
Ω
325.00°
ω
235.00°
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
C/2022 A3 (Lemmon-ATLAS)
Informal: Lemmon-ATLAS
C/2022 A3 · 2026-09-14 18:28:01 UTC → current
Discoverers
Discoverer · parsed-name · 2026-09-18 13:20:21 UTC → current
Discoverer · parsed-name · 2026-09-18 13:20:21 UTC → current
Discoverer · parsed-name · 2026-09-18 13:20:21 UTC → current
Discoverer · parsed-name · 2026-09-14 18:28:01 UTC → 2026-09-18 13:20:21 UTC
Contributors
CCD Observer · HIL04 · 13 reports · last 1280d ago
CCD Observer · DEK01 · 11 reports · last 1297d ago
CCD Observer · CAR06 · 6 reports · last 1301d ago
CCD Observer · CAR09 · 6 reports · last 1301d ago
CCD Observer · PAP04 · 4 reports · last 1308d ago
CCD Observer · MAS01 · 2 reports · last 1351d ago
CCD Observer · JAM02 · 1 reports · last 1342d ago
CCD Observer · FRI02 · 1 reports · last 1346d ago
Pips are observation weight on this object (log of report count). Hover for catalog-wide weight.