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Early warning for newly discovered comets and unconfirmed objects.

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133P

133P/Elst-Pizarro

CometClass Ecatalogued
Unknown

Not currently visible. Last report 803 days ago at mag 20.7. Historic peak was mag 18.7. 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

20.7

Professional survey · COBS consensus

Confidence

33

Class E · priority 60

Observations

28

Arc unknown

Last observation

803d ago

Mon, 26 Aug 2024 01:22:00 GMT · COBS consensus

Perihelion

2024-05-10

2.670 au

Peak window

2024-05-07 → 2024-08-05

COBS peak mag 18.7 on 2024-08-02 · perihelion 2024-05-10. Window is those dates ±3 days — not a light-curve fit.

Historic peak

18.7

COBS / analyzed peak 2024-08-02

Catalog ingest

21m ago

Venator last wrote this row 2026-11-07 03:30:20 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

2.670 au

e

0.1560

i

1.39°

Ω

160.00°

ω

132.00°

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

  • 133P/Elst-Pizarro

    133P · 2026-09-14 18:27:54 UTC → current

Discoverers

  • Elst-Pizarro

    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.