SL-16 R/B UME 1 (ISS 1)

0.952% collision chance on 2025-03-31 01:03:27z

CDM information

Conjunction Data Message description

SL-16 R/B is risking orbital collision with UME 1 (ISS 1). The time of closest approach (TCA) between the two objects is calculated to be at March 31, 2025, 1:27 a.m., with a collision probability of 0.952%. The closest distance at TCA is estimated to be 81.0 meters.

Key information

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

CDM image for a rocket body

TCA: 2025-03-31 01:27:03z

CDM ID: 981189249

Miss distance: 81.0 (m)

Collision probability: 0.009523358 (~0.952%)

Objects comparison

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

SL-16 R/B Name UME 1 (ISS 1)
27006 Norad ID 8709
ROCKET BODY Type PAYLOAD
SSO Orbit LEO
99.75° Inclination 69.67°
LARGE Size LARGE
CIS Country JPN
Dec. 10, 2001 Launch date Feb. 29, 1976
Full details

Live tracking

Real-time ground track for SL-16 R/B and UME 1 (ISS 1).


Newsletter sign-up

Weekly statistics, charts and insights to help you stay on top of the space industry.