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Early warning for newly discovered comets and unconfirmed objects.

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P/2025 A5

P/2025 A5 (Catalina)

CometClass Ecatalogued
Unknown

Visibility unknown. No recent magnitude. Large facilities may still recover it if an ephemeris exists.

Active comet in COBS

JSONCSV

Right ascension

—

J2000

Declination

—

J2000

Estimated magnitude

—

Unknown · COBS consensus

Confidence

33

Class E · priority 56

Observations

26

Arc unknown

Last observation

566d ago

Sat, 19 Apr 2025 21:35:59 GMT · COBS consensus

Perihelion

—

—

Peak window

2025-03-02

COBS published peak mag 14.9. Perihelion not in the catalog yet.

Historic peak

14.9

COBS / analyzed peak 2025-03-02

Catalog ingest

14h ago

Venator last wrote this row 2026-11-06 14:20:24 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

—

e

—

i

—

Ω

—

ω

—

a

—

MOID

—

H

—

H0 / n

—

NEO score

—

PHA score

—

RMS

—

Elongation

—

Reporting sources

  • COBS comet list

    ok

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

Name history

  • P/2025 A5 (Catalina)

    Informal: Catalina

    P/2025 A5 · 2026-09-14 18:28:02 UTC → current

Discoverers

  • Catalina

    Discoverer · parsed-name · 2026-09-14 18:28:02 UTC → current

Contributors

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