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Early warning for newly discovered comets and unconfirmed objects.

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C/1979 Y1

C/1979 Y1 (Bradfield)

CometClass Ecatalogued
Unknown

Not currently visible. Last report 16984 days ago at mag 32.4. Historic peak was mag 2.2. 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

32.4

Professional survey · COBS consensus

Confidence

33

Class E · priority 60

Observations

479

Arc unknown

Last observation

16984d ago

Mon, 17 Mar 1980 20:09:35 GMT · COBS consensus

Perihelion

1979-11-27

0.529 au

Peak window

1979-11-24 → 1980-01-12

COBS peak mag 2.2 on 1980-01-09 · perihelion 1979-11-27. Window is those dates ±3 days — not a light-curve fit.

Historic peak

2.2

COBS / analyzed peak 1980-01-09

Catalog ingest

11h ago

Venator last wrote this row 2026-09-16 13:20:17 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

0.529 au

e

0.9880

i

148.00°

Ω

102.00°

ω

256.00°

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/1979 Y1 (Bradfield)

    Informal: Bradfield

    C/1979 Y1 · 2026-09-14 18:27:57 UTC → current

Discoverers

  • Bradfield

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

Contributors

  • Charles S Morris

    Visual Observer · MOR · 38 reports · last 16998d ago

  • Graham Keitch

    Visual Observer · KEI · 22 reports · last 16984d ago

  • Albert F. Jones

    Visual Observer · JON · 19 reports · last 17015d ago

  • Masaru Yamashita

    Visual Observer · YAM02 · 18 reports · last 17009d ago

  • T. B. Tregaskis

    Visual Observer · TRE · 16 reports · last 17025d ago

  • Jim Deyoung

    Visual Observer · DEY · 15 reports · last 16998d ago

  • Leo Boethin

    Visual Observer · BOE · 14 reports · last 16992d ago

  • Shigeo Mitsuma

    Visual Observer · MIT · 13 reports · last 16992d ago

  • Takashi Nagata

    Visual Observer · NAG02 · 13 reports · last 17014d ago

  • David Seargent

    Visual Observer · SEA · 12 reports · last 17014d ago

  • Guy M. Hurst

    Visual Observer · HUR · 12 reports · last 16988d ago

  • Peter Bus

    Visual Observer · BUS01 · 12 reports · last 17012d ago

  • Reinder J. Bouma

    Visual Observer · BOU · 12 reports · last 17011d ago

  • Syoji Yonezu

    Visual Observer · YON · 12 reports · last 17011d ago

  • Toshihide Noguchi

    Visual Observer · NOG · 12 reports · last 17012d ago

  • Andrew Pearce

    CCD Observer · PEA · 11 reports · last 17025d ago

  • Gary Kronk

    Visual Observer · KRO02 · 11 reports · last 17013d ago

  • Nobuo Ookura

    Visual Observer · OOK · 11 reports · last 17014d ago

  • Takashi Ochiai

    Visual Observer · OCH · 11 reports · last 17014d ago

  • Akimasa Nakamura

    Visual Observer · NAK01 · 10 reports · last 17011d ago

  • Christopher E. Spratt

    Visual Observer · SPR · 10 reports · last 17002d ago

  • James A. Morgan

    Visual Observer · MOR02 · 10 reports · last 17000d ago

  • V. D. Diakonova

    Visual Observer · DIA01 · 10 reports · last 16985d ago

  • J. da S. Campos

    Visual Observer · CAM · 9 reports · last 17020d ago

  • Kenzo Suzuki

    Visual Observer · SUZ · 9 reports · last 17014d ago

  • M. Fulle

    Visual Observer · FUL · 9 reports · last 17016d ago

  • Mikio Yokokawa

    Visual Observer · YOK · 9 reports · last 17015d ago

  • Henk Feijth

    Visual Observer · FEI · 8 reports · last 17014d ago

  • John E. Bortle

    Visual Observer · BOR · 8 reports · last 17025d ago

  • Kazimieras Cernis

    Visual Observer · CHE03 · 8 reports · last 16984d ago

  • Shoji Harada

    Visual Observer · HAR01 · 8 reports · last 17010d ago

  • Tetsuo Tanaka

    Visual Observer · TAN · 8 reports · last 17008d ago

  • Warren Morrison

    Visual Observer · MOR03 · 8 reports · last 17016d ago

  • Hiroshi Tokumasu

    Visual Observer · TOK · 7 reports · last 17020d ago

  • Masaaki Asakura

    Visual Observer · ASA · 7 reports · last 17013d ago

  • Masatsugu Nakamura

    Visual Observer · NAK03 · 7 reports · last 17016d ago

  • Roy W. Panther

    Visual Observer · PAN · 7 reports · last 16988d ago

  • Akio Oka

    Visual Observer · OKA03 · 6 reports · last 17014d ago

  • Chris Quinnert

    Visual Observer · QUI · 6 reports · last 17020d ago

  • Erwin Filimon

    Visual Observer · FIL01 · 6 reports · last 17010d ago

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