TRANSIT 4A DELTA 1 DEB

0.041% collision chance on 2025-11-17 00:11:07z

CDM information

Conjunction Data Message description

TRANSIT 4A is risking orbital collision with DELTA 1 DEB. The time of closest approach (TCA) between the two objects is calculated to be at Nov. 17, 2025, 12:07 a.m., with a collision probability of 0.041%. The closest distance at TCA is estimated to be 191.0 meters.

Note: this is the latest available calculation for this conjunction event. Access all the most updated CDMs for object TRANSIT 4A in its detailed page.

Key information

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

TCA: 2025-11-17 00:07:16z

CDM ID: 1229552215

Miss distance: 191.0 (m)

Collision probability: 0.0004080806 (~0.041%)

Last Updated: 4 weeks, 1 day ago

Objects comparison

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

TRANSIT 4A	Name	DELTA 1 DEB
116	Norad ID	12190
PAYLOAD	Type	DEBRIS
LEO	Orbit	SSO
66.81°	Inclination	99.06°
MEDIUM	Size	SMALL
US	Country	US
June 29, 1961	Launch date	March 5, 1978
	Full details

Live tracking

Real-time ground track for TRANSIT 4A and DELTA 1 DEB.

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