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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 17035 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

17035d 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

13h ago

Venator last wrote this row 2026-11-06 14:20:20 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 17049d ago

  • Graham Keitch

    Visual Observer · KEI · 22 reports · last 17035d ago

  • Albert F. Jones

    Visual Observer · JON · 19 reports · last 17066d ago

  • Masaru Yamashita

    Visual Observer · YAM02 · 18 reports · last 17060d ago

  • T. B. Tregaskis

    Visual Observer · TRE · 16 reports · last 17076d ago

  • Jim Deyoung

    Visual Observer · DEY · 15 reports · last 17049d ago

  • Leo Boethin

    Visual Observer · BOE · 14 reports · last 17043d ago

  • Shigeo Mitsuma

    Visual Observer · MIT · 13 reports · last 17043d ago

  • Takashi Nagata

    Visual Observer · NAG02 · 13 reports · last 17065d ago

  • David Seargent

    Visual Observer · SEA · 12 reports · last 17065d ago

  • Guy M. Hurst

    Visual Observer · HUR · 12 reports · last 17039d ago

  • Peter Bus

    Visual Observer · BUS01 · 12 reports · last 17063d ago

  • Reinder J. Bouma

    Visual Observer · BOU · 12 reports · last 17062d ago

  • Syoji Yonezu

    Visual Observer · YON · 12 reports · last 17062d ago

  • Toshihide Noguchi

    Visual Observer · NOG · 12 reports · last 17063d ago

  • Andrew Pearce

    CCD Observer · PEA · 11 reports · last 17077d ago

  • Gary Kronk

    Visual Observer · KRO02 · 11 reports · last 17064d ago

  • Nobuo Ookura

    Visual Observer · OOK · 11 reports · last 17065d ago

  • Takashi Ochiai

    Visual Observer · OCH · 11 reports · last 17065d ago

  • Akimasa Nakamura

    Visual Observer · NAK01 · 10 reports · last 17062d ago

  • Christopher E. Spratt

    Visual Observer · SPR · 10 reports · last 17053d ago

  • James A. Morgan

    Visual Observer · MOR02 · 10 reports · last 17051d ago

  • V. D. Diakonova

    Visual Observer · DIA01 · 10 reports · last 17036d ago

  • J. da S. Campos

    Visual Observer · CAM · 9 reports · last 17071d ago

  • Kenzo Suzuki

    Visual Observer · SUZ · 9 reports · last 17066d ago

  • M. Fulle

    Visual Observer · FUL · 9 reports · last 17067d ago

  • Mikio Yokokawa

    Visual Observer · YOK · 9 reports · last 17066d ago

  • Henk Feijth

    Visual Observer · FEI · 8 reports · last 17065d ago

  • John E. Bortle

    Visual Observer · BOR · 8 reports · last 17076d ago

  • Kazimieras Cernis

    Visual Observer · CHE03 · 8 reports · last 17035d ago

  • Shoji Harada

    Visual Observer · HAR01 · 8 reports · last 17061d ago

  • Tetsuo Tanaka

    Visual Observer · TAN · 8 reports · last 17059d ago

  • Warren Morrison

    Visual Observer · MOR03 · 8 reports · last 17067d ago

  • Hiroshi Tokumasu

    Visual Observer · TOK · 7 reports · last 17071d ago

  • Masaaki Asakura

    Visual Observer · ASA · 7 reports · last 17064d ago

  • Masatsugu Nakamura

    Visual Observer · NAK03 · 7 reports · last 17067d ago

  • Roy W. Panther

    Visual Observer · PAN · 7 reports · last 17039d ago

  • Akio Oka

    Visual Observer · OKA03 · 6 reports · last 17065d ago

  • Chris Quinnert

    Visual Observer · QUI · 6 reports · last 17071d ago

  • Erwin Filimon

    Visual Observer · FIL01 · 6 reports · last 17061d ago

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