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Venator

Early warning for newly discovered comets and unconfirmed objects.

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P/2004 V5-B

P/2004 V5-B (LINEAR-Hill)

CometClass Ecatalogued
Northern hemisphere

Not currently visible. Last report 7864 days ago at mag 17.8. 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

07h 46m 31s

J2000

Declination

+38° 38′ 22″

J2000

Estimated magnitude

17.8

CCD / citizen telescope · COBS consensus

Confidence

33

Class E · priority 66

Observations

7

Arc unknown

Last observation

7864d ago

Wed, 27 Apr 2005 12:57:35 GMT · COBS consensus

Perihelion

2027-08-05

4.430 au

Peak window

2027-08-02 → 2028-02-16

COBS peak mag 17.4 on 2028-02-13 · perihelion 2027-08-05. Window is those dates ±3 days — not a light-curve fit.

Historic peak

17.4

COBS / analyzed peak 2028-02-13

Catalog ingest

8m ago

Venator last wrote this row 2026-11-07 04:30:19 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

4.430 au

e

0.4510

i

19.30°

Ω

47.70°

ω

87.10°

a

8.080 au

MOID

—

H

—

H0 / n

8.0 / 4

NEO score

—

PHA score

—

RMS

—

Elongation

112°

Reporting sources

  • COBS comet list

    ok

    Comet Observation Database magnitudes and perihelion data for the full COBS list (active and inactive).

  • COBS orbits

    ok

    Osculating elements and photometric parameters (H0, n) for active comets.

Name history

  • P/2004 V5-B (LINEAR-Hill)

    Informal: LINEAR-Hill

    P/2004 V5-B · 2026-09-13 22:21:23 UTC → current

Discoverers

  • Hill

    Discoverer · parsed-name · 2026-09-15 02:51:49 UTC → current

  • LINEAR

    Discoverer · parsed-name · 2026-09-15 02:51:49 UTC → current

  • LINEAR-Hill

    Discoverer · parsed-name · 2026-09-15 02:51:49 UTC → current

  • LINEAR-Hill

    Discoverer · parsed-name · 2026-09-13 22:21:23 UTC → 2026-09-15 02:51:49 UTC

Contributors

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