424P
424P/La Sagra
Not currently visible. Last report 1830 days ago at mag 30.4. Historic peak was mag 17.7. 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
30.4
Professional survey · COBS consensus
Confidence
33
Class E · priority 60
Observations
2
Arc unknown
Last observation
1830d ago
Sun, 12 Sep 2021 20:52:47 GMT · COBS consensus
Perihelion
2021-10-30
1.370 au
Peak window
2021-10-12 → 2021-11-02
COBS peak mag 17.7 on 2021-10-15 · perihelion 2021-10-30. Window is those dates ±3 days — not a light-curve fit.
Historic peak
17.7
COBS / analyzed peak 2021-10-15
Catalog ingest
15h ago
Venator last wrote this row 2026-09-16 13:20:19 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
1.370 au
e
0.6900
i
8.68°
Ω
51.20°
ω
313.00°
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
424P/La Sagra
424P · 2026-09-14 18:28:01 UTC → current
Discoverers
Discoverer · parsed-name · 2026-09-14 18:28:01 UTC → current
Contributors
CCD Observer · PAP04 · 1 reports · last 1830d ago
CCD Observer · SHU · 1 reports · last 5079d ago
Pips are observation weight on this object (log of report count). Hover for catalog-wide weight.