COSMOS 1816 M-4S R/B

0.193% collision chance on 2025-06-18 21:06:47z

CDM information

Conjunction Data Message description

COSMOS 1816 is risking orbital collision with M-4S R/B. The time of closest approach (TCA) between the two objects is calculated to be at June 18, 2025, 9:47 p.m., with a collision probability of 0.193%. The closest distance at TCA is estimated to be 445.0 meters.

Note: this is the latest available calculation for this conjunction event. Access all the most updated CDMs for object COSMOS 1816 in its detailed page.

Key information

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

TCA: 2025-06-18 21:47:51z

CDM ID: 1056085317

Miss distance: 445.0 (m)

Collision probability: 0.0019282 (~0.193%)

Last Updated: 2 weeks, 6 days ago

Objects comparison

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

COSMOS 1816	Name	M-4S R/B
17359	Norad ID	5126
PAYLOAD	Type	ROCKET BODY
LEO	Orbit	LEO
82.92°	Inclination	29.68°
LARGE	Size	MEDIUM
CIS	Country	JPN
Jan. 29, 1987	Launch date	Feb. 16, 1971
	Full details

Live tracking

Real-time ground track for COSMOS 1816 and M-4S R/B.

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