SL-8 DEB CZ-4 DEB

0.016% collision chance on 2025-09-20 20:09:03z

CDM information

Conjunction Data Message description

SL-8 DEB is risking orbital collision with CZ-4 DEB. The time of closest approach (TCA) between the two objects is calculated to be at Sept. 20, 2025, 8:03 p.m., with a collision probability of 0.016%. The closest distance at TCA is estimated to be 515.0 meters.

Note: this is the latest available calculation for this conjunction event. Access all the most updated CDMs for object SL-8 DEB in its detailed page.

Key information

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

TCA: 2025-09-20 20:03:09z

CDM ID: 1158866433

Miss distance: 515.0 (m)

Collision probability: 0.0001560361 (~0.016%)

Last Updated: 3 weeks, 6 days ago

Objects comparison

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

SL-8 DEB	Name	CZ-4 DEB
12404	Norad ID	20904
DEBRIS	Type	DEBRIS
LEO	Orbit	SSO
82.91°	Inclination	98.42°
SMALL	Size	SMALL
CIS	Country	PRC
March 17, 1980	Launch date	Sept. 3, 1990
	Full details

Live tracking

Real-time ground track for SL-8 DEB and CZ-4 DEB.

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