COSMOS 644 DELTA 1 DEB

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

CDM information

Conjunction Data Message description

COSMOS 644 is risking orbital collision with DELTA 1 DEB. 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 COSMOS 644 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: 1260208471

Miss distance: 21.0 (m)

Collision probability: 0.0004228289 (~0.042%)

Last Updated: 1 week, 4 days ago

Objects comparison

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

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

Live tracking

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

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