IRIDIUM 4 FENGYUN 1C DEB

0.011% collision chance on 2025-09-28 23:09:00z

CDM information

Conjunction Data Message description

IRIDIUM 4 is risking orbital collision with FENGYUN 1C DEB. The time of closest approach (TCA) between the two objects is calculated to be at Sept. 28, 2025, 11 p.m., with a collision probability of 0.011%. The closest distance at TCA is estimated to be 516.0 meters.

Note: this is the latest available calculation for this conjunction event. Access all the most updated CDMs for object IRIDIUM 4 in its detailed page.

Key information

Parameters and calculations for this potential in-orbit collision event.

TCA: 2025-09-28 23:00:17z

CDM ID: 1170731938

Miss distance: 516.0 (m)

Collision probability: 0.0001056242 (~0.011%)

Last Updated: 2 weeks, 6 days ago

Objects comparison

A comparison of the two objects interested by this conjunction data message.

IRIDIUM 4	Name	FENGYUN 1C DEB
24796	Norad ID	30941
PAYLOAD	Type	DEBRIS
LEO	Orbit	SSO
86.39°	Inclination	98.55°
LARGE	Size	SMALL
US	Country	PRC
May 5, 1997	Launch date	May 10, 1999
	Full details

Live tracking

Real-time ground track for IRIDIUM 4 and FENGYUN 1C DEB.

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