509P/Catalina MPEC 2026-HH0
509P/Catalina MPEC 2026-HH0
Visibility unknown. No recent magnitude. Large facilities may still recover it if an ephemeris exists.
Right ascension
09h 02m 28s
J2000
Declination
+13° 07′ 59″
J2000
Estimated magnitude
—
Unknown
Confidence
41
Class D · priority 50
Observations
0
Arc unknown
Last observation
Not in feed
Feed does not publish an observer timestamp. Catalog ingested 13h ago.
Perihelion
2026-03-19
3.693 au
Peak window
2026-03-19
Using perihelion as a stand-in for peak. Dust comets often brighten a few days later.
Historic peak
—
No peak date yet
Catalog ingest
13h ago
Venator last wrote this row 2026-09-16 13:20:37 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
3.693 au
e
0.4753
i
8.60°
Ω
275.21°
ω
180.10°
a
7.039 au
MOID
—
H
10.0
H0 / n
10.0 / 4
NEO score
—
PHA score
—
RMS
—
Elongation
40°
Reporting sources
MPC AllCometEls
okFull MPC comet orbit catalog. Stored even when fainter than the UI default of mag 22.
Name history
509P/Catalina MPEC 2026-HH0
509P/Catalina MPEC 2026-HH0 · 2026-09-14 18:29:12 UTC → current
Discoverers
Discoverer · parsed-name · 2026-09-15 13:20:34 UTC → current
Discoverer · parsed-name · 2026-09-15 13:20:34 UTC → current
Discoverer · parsed-name · 2026-09-15 13:20:34 UTC → current
Discoverer · parsed-name · 2026-09-14 18:29:12 UTC → 2026-09-15 13:20:34 UTC
Contributors
- No recent COBS visual or CCD reports linked yet.
Pips are observation weight on this object (log of report count). Hover for catalog-wide weight.