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Venator

Early warning for newly discovered comets and unconfirmed objects.

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18D

18D/Perrine-Mrkos

CometClass Ecatalogued
Unknown

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

JSONCSV

Right ascension

—

J2000

Declination

—

J2000

Estimated magnitude

—

Unknown · COBS consensus

Confidence

33

Class E · priority 56

Observations

8

Arc unknown

Last observation

11208d ago

Wed, 10 Jan 1996 01:55:12 GMT · COBS consensus

Perihelion

2024-08-29

1.590 au

Peak window

2024-08-26 → 2024-09-01

COBS peak mag 10.0 on 2024-08-29 · perihelion 2024-08-29. Window is those dates ±3 days — not a light-curve fit.

Historic peak

10.0

COBS / analyzed peak 2024-08-29

Catalog ingest

11h ago

Venator last wrote this row 2026-09-16 13:20:16 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

1.590 au

e

0.5890

i

17.70°

Ω

158.00°

ω

238.00°

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

  • 18D/Perrine-Mrkos

    18D · 2026-09-14 18:27:54 UTC → current

Discoverers

  • Perrine-Mrkos

    Discoverer · parsed-name · 2026-09-14 18:27:54 UTC → current

Contributors

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