C/2019 E3
C/2019 E3 (ATLAS)
Not currently visible. Last report 480 days ago at mag 18.4. 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
18.4
Professional survey · COBS consensus
Confidence
33
Class E · priority 60
Observations
7
Arc unknown
Last observation
480d ago
Sun, 25 May 2025 02:24:00 GMT · COBS consensus
Perihelion
2023-11-16
10.300 au
Peak window
2023-08-30 → 2023-11-19
COBS peak mag 17.7 on 2023-09-02 · perihelion 2023-11-16. Window is those dates ±3 days — not a light-curve fit.
Historic peak
17.7
COBS / analyzed peak 2023-09-02
Catalog ingest
5m ago
Venator last wrote this row 2026-09-17 05:00:04 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
10.300 au
e
0.9990
i
84.30°
Ω
347.00°
ω
281.00°
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/2019 E3 (ATLAS)
Informal: ATLAS
C/2019 E3 · 2026-09-13 22:21:23 UTC → current
Discoverers
Discoverer · parsed-name · 2026-09-13 22:21:23 UTC → current
Contributors
CCD Observer · PAP04 · 4 reports · last 1291d ago
CCD Observer · PEA · 2 reports · last 480d ago
CCD Observer · MAS01 · 1 reports · last 2745d ago
Pips are observation weight on this object (log of report count). Hover for catalog-wide weight.