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Early warning for newly discovered comets and unconfirmed objects.

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C/2026 A2

C/2026 A2 (Bok)

CometClass Ecatalogued
Southern hemisphere

Visible to modest telescopes (mag 12.3). Last report 1 days ago.

Active comet in COBS

JSONCSV

Right ascension

12h 47m 27s

J2000

Declination

−30° 59′ 18″

J2000

Estimated magnitude

12.3

Small telescope · COBS consensus

Confidence

33

Class E · priority 76

Observations

42

80.00 d arc

Last observation

15h ago

Fri, 06 Nov 2026 12:28:47 GMT · COBS consensus

Perihelion

2026-12-22

1.940 au

Peak window

2026-11-22 → 2026-12-25

COBS peak mag 12.0 on 2026-11-25 · perihelion 2026-12-22. Window is those dates ±3 days — not a light-curve fit.

Historic peak

12.0

COBS / analyzed peak 2026-11-25

Catalog ingest

16m 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

1.940 au

e

0.9980

i

82.30°

Ω

207.00°

ω

156.00°

a

830.000 au

MOID

—

H

—

H0 / n

5.8 / 7.3

NEO score

—

PHA score

—

RMS

—

Elongation

31°

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

  • C/2026 A2 (Bok)

    Informal: Bok

    C/2026 A2 · 2026-09-08 02:09:56 UTC → current

Discoverers

  • Bok

    Discoverer · parsed-name · 2026-09-08 17:27:23 UTC → current

Contributors

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