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Early warning for newly discovered comets and unconfirmed objects.

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C/1953 G1

C/1953 G1 (Mrkos-Honda)

CometClass Ecatalogued
Unknown

Not currently visible. Last report 26756 days ago at mag 42.9. Historic peak was mag 13.9. 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

42.9

Professional survey · COBS consensus

Confidence

33

Class E · priority 60

Observations

71

Arc unknown

Last observation

26756d ago

Mon, 15 Jun 1953 22:19:11 GMT · COBS consensus

Perihelion

1953-05-18

1.010 au

Peak window

1953-05-07 → 1953-05-21

COBS peak mag 13.9 on 1953-05-10 · perihelion 1953-05-18. Window is those dates ±3 days — not a light-curve fit.

Historic peak

13.9

COBS / analyzed peak 1953-05-10

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.

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

1.010 au

e

0.9970

i

93.50°

Ω

274.00°

ω

85.40°

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/1953 G1 (Mrkos-Honda)

    Informal: Mrkos-Honda

    C/1953 G1 · 2026-09-14 18:27:57 UTC → current

Discoverers

  • Mrkos-Honda

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

Contributors

  • A. M. Bakcharev

    Visual Observer · BAK02 · 18 reports · last 26756d ago

  • G.E.D. Alcock

    Visual Observer · ALC · 10 reports · last 26778d ago

  • S. V. Drozdov

    Visual Observer · DRO · 10 reports · last 26759d ago

  • G. E. Stone

    Visual Observer · STO01 · 7 reports · last 26761d ago

  • Max Beyer

    Visual Observer · BEY · 7 reports · last 26769d ago

  • W. T. Gayfer

    Visual Observer · GAY · 5 reports · last 26789d ago

  • D. J. Martynoff

    Visual Observer · MAR23 · 3 reports · last 26779d ago

  • W. A. Granger

    Visual Observer · GRA · 3 reports · last 26792d ago

  • G. Merton

    Visual Observer · MER02 · 2 reports · last 26783d ago

  • W. H. Steavenson

    Visual Observer · STE06 · 2 reports · last 26792d ago

  • A. A. Yakovkin

    Visual Observer · YAK · 1 reports · last 26778d ago

  • F. J. Acfield

    Visual Observer · ACF · 1 reports · last 26787d ago

  • F. K. Usmanova

    Visual Observer · USM · 1 reports · last 26781d ago

  • I. S. Astapovich

    Visual Observer · AST · 1 reports · last 26779d ago

  • O. F. Bohorodsky

    Visual Observer · BOH01 · 1 reports · last 26762d ago

  • V. P. Konoplova

    Visual Observer · KON08 · 1 reports · last 26780d ago

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