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Venator

Early warning for newly discovered comets and unconfirmed objects.

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112P

112P/Urata-Niijima

CometClass Ecatalogued
Northern hemisphere

Difficult — CCD / large telescope. Around mag 17.4. A large amateur CCD or a professional telescope is required.

Active comet in COBS

JSONCSV

Right ascension

09h 10m 37s

J2000

Declination

+46° 45′ 27″

J2000

Estimated magnitude

17.4

CCD / citizen telescope · COBS consensus

Confidence

33

Class E · priority 66

Observations

47

Arc unknown

Last observation

3d ago

Wed, 04 Nov 2026 07:52:00 GMT · COBS consensus

Perihelion

2026-09-21

1.440 au

Peak window

2026-09-18 → 2026-09-24

COBS peak mag 16.4 on 2026-09-21 · perihelion 2026-09-21. Window is those dates ±3 days — not a light-curve fit.

Historic peak

16.4

COBS / analyzed peak 2026-09-21

Catalog ingest

11m ago

Venator last wrote this row 2026-11-07 03:00:09 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

1.440 au

e

0.5910

i

24.20°

Ω

31.80°

ω

21.60°

a

3.520 au

MOID

—

H

—

H0 / n

8.2 / 20

NEO score

—

PHA score

—

RMS

—

Elongation

98°

Reporting sources

  • COBS comet list

    ok

    Comet Observation Database magnitudes and perihelion data for the full COBS list (active and inactive).

  • COBS orbits

    ok

    Osculating elements and photometric parameters (H0, n) for active comets.

Name history

  • 112P/Urata-Niijima

    112P · 2026-09-13 22:21:22 UTC → current

Discoverers

  • Urata-Niijima

    Discoverer · parsed-name · 2026-09-13 22:21:22 UTC → current

Contributors

Pips are observation weight on this object (log of report count). Hover for catalog-wide weight.