DELTA 1 DEB COSMOS 644

0.042% collision chance on 2025-12-10 06:12:59z

CDM information

Conjunction Data Message description

DELTA 1 DEB is risking orbital collision with COSMOS 644. The time of closest approach (TCA) between the two objects is calculated to be at Dec. 10, 2025, 6:59 a.m., with a collision probability of 0.042%. The closest distance at TCA is estimated to be 21.0 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: 2025-12-10 06:59:56z

CDM ID: 1260255760

Miss distance: 21.0 (m)

Collision probability: 0.0004228289 (~0.042%)

Last Updated: 1 week, 2 days ago

Objects comparison

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

DELTA 1 DEB	Name	COSMOS 644
21566	Norad ID	7268
DEBRIS	Type	PAYLOAD
SSO	Orbit	LEO
99.59°	Inclination	74.02°
SMALL	Size	MEDIUM
US	Country	CIS
June 12, 1975	Launch date	April 23, 1974
	Full details

Live tracking

Real-time ground track for DELTA 1 DEB and COSMOS 644.

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