M-4S R/B COSMOS 1816

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

CDM information

Conjunction Data Message description

M-4S R/B is risking orbital collision with COSMOS 1816. 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 M-4S R/B 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: 1056081254

Miss distance: 445.0 (m)

Collision probability: 0.0019282 (~0.193%)

Last Updated: 2 weeks, 5 days ago

Objects comparison

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

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

Live tracking

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

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