C/2012 S1 (ISON)

The comet broke apart near the Sun. Its observed behavior has a natural explanation.

01 / RECORD

What is documented

NASA describes severe heating and disruption before perihelion on 28 November 2013; the remnant briefly brightened, then faded.

02 / ANALYSIS

Disruption during the close solar approach is consistent with observations from multiple spacecraft.

03 / LIMITS

The published record leaves no separate anomalous event requiring a different cause.

PROVENANCE / SOURCE

2026-09-30 — Record published with a source and stated limits.