C/1901 G1
C/1901 G1 (Viscara)
Not currently visible. Last report 45830 days ago at mag 33.9. Historic peak was mag -5.3. 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
33.9
Professional survey · COBS consensus
Confidence
33
Class E · priority 60
Observations
11
Arc unknown
Last observation
45830d ago
Fri, 17 May 1901 21:35:59 GMT · COBS consensus
Perihelion
1901-05-08
0.217 au
Peak window
1901-05-05 → 1901-05-11
COBS peak mag -5.3 on 1901-05-08 · perihelion 1901-05-08. Window is those dates ±3 days — not a light-curve fit.
Historic peak
-5.3
COBS / analyzed peak 1901-05-08
Catalog ingest
15h ago
Venator last wrote this row 2026-11-07 14:20:17 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
0.217 au
e
1.0000
i
127.00°
Ω
110.00°
ω
202.00°
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/1901 G1 (Viscara)
Informal: Viscara
C/1901 G1 · 2026-09-14 18:27:57 UTC → current
Discoverers
Discoverer · parsed-name · 2026-09-14 18:27:57 UTC → current
Contributors
Visual Observer · DES04 · 6 reports · last 45830d ago
Visual Observer · FEL03 · 4 reports · last 45830d ago
CCD Observer · PEA · 1 reports · last 45834d ago
Pips are observation weight on this object (log of report count). Hover for catalog-wide weight.