DELTA 1 DEB IRS 1B

0.032% collision chance on 2024-09-24 20:09:42z

CDM information

Conjunction Data Message description

DELTA 1 DEB is risking orbital collision with IRS 1B. The time of closest approach (TCA) between the two objects is calculated to be at Sept. 24, 2024, 8:42 p.m., with a collision probability of 0.032%. The closest distance at TCA is estimated to be 272.0 meters.

Key information

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

CDM image for a debris

TCA: 2024-09-24 20:42:32z

CDM ID: 824113713

Miss distance: 272.0 (m)

Collision probability: 0.0003228416 (~0.032%)

Objects comparison

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

DELTA 1 DEB Name IRS 1B
17765 Norad ID 21688
DEBRIS Type PAYLOAD
SSO Orbit SSO
99.04° Inclination 99.4°
SMALL Size LARGE
US Country IND
March 5, 1978 Launch date Aug. 29, 1991
Full details

Live tracking

Real-time ground track for DELTA 1 DEB and IRS 1B.


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