comets.venator.space

Venator

Early warning for newly discovered comets and unconfirmed objects.

Back to Contributors

C/1985 K1

C/1985 K1 (Machholz)

CometClass Ecatalogued
Unknown

Not currently visible. Last report 15022 days ago at mag 35.5. Historic peak was mag -1.5. Typical backyard telescopes will not show it. HST, JWST, or an 8–10 m class telescope might recover it with a good ephemeris.

Active comet in COBS

JSONCSV

Right ascension

—

J2000

Declination

—

J2000

Estimated magnitude

35.5

Professional survey · COBS consensus

Confidence

33

Class E · priority 60

Observations

68

Arc unknown

Last observation

15022d ago

Wed, 31 Jul 1985 20:09:35 GMT · COBS consensus

Perihelion

1985-06-24

0.093 au

Peak window

1985-06-21 → 1985-06-27

COBS peak mag -1.5 on 1985-06-24 · perihelion 1985-06-24. Window is those dates ±3 days — not a light-curve fit.

Historic peak

-1.5

COBS / analyzed peak 1985-06-24

Catalog ingest

11h ago

Venator last wrote this row 2026-09-16 13:20:18 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

0.093 au

e

1.0000

i

16.20°

Ω

194.00°

ω

275.00°

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

  • C/1985 K1 (Machholz)

    Informal: Machholz

    C/1985 K1 · 2026-09-14 18:27:57 UTC → current

Discoverers

  • Machholz

    Discoverer · parsed-name · 2026-09-14 18:27:57 UTC → current

Contributors

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