Table 1. Collision risk assessment between COSMOS 1275 DEB and FENGYUN 1C DEB

	Space-track	SGP4	Spherical-harmonic
TCA (UTC)	2021-10-08	2021-10-08	2021-10-08
	07:31:02.387	07:31:02.374	07:31:02.296
Min distance (m)	21	264.88	626.20
Pc (–)	7.35475e-04	0	0

TCA (UTC), time of closet approach (coordinated universal time).