DELTA 1 DEB COSMOS 877

0.046% collision chance on 2025-12-15 22:12:53z

CDM information

Conjunction Data Message description

DELTA 1 DEB is risking orbital collision with COSMOS 877. The time of closest approach (TCA) between the two objects is calculated to be at Dec. 15, 2025, 10:53 p.m., with a collision probability of 0.046%. The closest distance at TCA is estimated to be 60.0 meters.

Note: this is the latest available calculation for this conjunction event. Access all the most updated CDMs for object DELTA 1 DEB in its detailed page.

Key information

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

TCA: 2025-12-15 22:53:34z

CDM ID: 1263480485

Miss distance: 60.0 (m)

Collision probability: 0.0004600103 (~0.046%)

Last Updated: 19 hours ago

Objects comparison

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

DELTA 1 DEB	Name	COSMOS 877
8084	Norad ID	9594
DEBRIS	Type	PAYLOAD
SSO	Orbit	LEO
98.65°	Inclination	74.03°
SMALL	Size	MEDIUM
US	Country	CIS
July 23, 1972	Launch date	Dec. 7, 1976
	Full details

Live tracking

Real-time ground track for DELTA 1 DEB and COSMOS 877.

Return to all CDMs

Newsletter sign-up

Weekly statistics, charts and insights to help you stay on top of the space industry.