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2021-091B

In orbit NORAD 49316 FYCF-6876-5593-2713-7609 China

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2021

Launch

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Observations all time

Mission information
Spacecraft name
2021-091B
Other names
2021-091B
Status
Active
The satellite is in orbit
The network has not received data from this satellite for a long time
Launch and timeline
Launch time
2021-10-14 00:00:00
Separation time
2021-10-14 00:00:00
Satellite appearance
Data for the last 30 days
Orbital parameters of the satellite
Perigee
496.49 km
Apogee
515.02 km
Inclination
97.4°
Period
94.8 min
Semi-major axis
6883.9 km
Velocity
7.61 km/s
Orbital elements
TLE source
Celestrak
TLE updated
2026-10-10 20:56:56 UTC
Two-line elements (TLE)
1 49316U 21091B   26283.61961472  .00002276  00000-0  11174-3 0  9997
2 49316  97.4457 109.4973 0013498   5.7050 354.4335 15.19028838276508
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Orbit history, past year

Mean elements of every TLE set over the past 365 days, plotted against the epoch of the set. Each source is its own line; click it in the legend to hide it. A jump in altitude is a manoeuvre or a bad set; lines drifting apart are a disagreement between sources. “TLE age” is how many hours have passed since the epoch of the source's freshest set, plotted against when the set reached us, on a logarithmic scale. A set the source repeats unchanged does not reset the age.

Prediction divergence

Each TLE set is propagated with SGP4 to the epoch of the next set from the same source and compared with it, plotted against the epoch of the next set; the tooltip shows how many hours ahead the prediction ran. The logarithmic scale shows the size of the divergence and the tooltip its sign: plus along-track means the prediction is ahead of the satellite. This is how well the sets agree, not the true error: the reference is a TLE too, off by about a kilometre. An outlier is a manoeuvre between sets. Sets more than a week apart are not compared.

Time of closest approach, UTC Object 1 Object 2 Distance, km Speed, km/s Max. probability
2026-10-11 04:42:49 JB-3 3 (ZY 2C)
NORAD 28470 		OBJECT B
NORAD 49316 		4.907 4.70 1.8e-07
2026-10-11 11:02:26 OBJECT B
NORAD 49316 		AAC-HSI-SAT2
NORAD 56995 		2.119 4.03 9.5e-07
2026-10-11 12:39:42 OBJECT B
NORAD 49316 		OBJECT B
NORAD 100367 		2.197 12.82 5.5e-07
2026-10-11 21:42:20 OBJECT B
NORAD 49316 		H-2A R/B
NORAD 39771 		3.904 15.06 1.0e-07
2026-10-12 08:05:59 OBJECT B
NORAD 49316 		YUNYAO-1 19
NORAD 58759 		4.619 14.39 9.4e-08
2026-10-13 15:59:00 OBJECT B
NORAD 49316 		OBJECT B
NORAD 65489 		4.405 0.22 2.3e-07
2026-10-14 19:12:18 OBJECT B
NORAD 49316 		STARLINK-5868
NORAD 56483 		3.764 15.11 3.3e-06
2026-10-14 20:22:34 OBJECT B
NORAD 49316 		HOTSAT-2
NORAD 68465 		3.751 13.72 1.7e-07
2026-10-14 21:17:12 OBJECT B
NORAD 49316 		LEO EXPRESS 2
NORAD 62673 		4.455 12.62 1.4e-07
2026-10-14 21:17:21 OBJECT B
NORAD 49316 		TIANYI C
NORAD 64050 		3.795 12.84 1.9e-07
2026-10-16 12:36:54 OBJECT B
NORAD 49316 		SL-3 R/B
NORAD 19046 		4.209 14.76 2.7e-07
2026-10-16 15:12:31 HAWK-B
NORAD 43794 		OBJECT B
NORAD 49316 		2.423 13.97 3.8e-07
2026-10-17 00:40:05 OBJECT B
NORAD 49316 		SUPERVIEW NEO-1 02
NORAD 52322 		4.451 12.86 1.3e-07

Data: CelesTrak SOCRATES Plus, computed from TLEs of the public catalog. This is an estimate, not grounds for a manoeuvre: TLEs carry no covariance, and the maximum probability assumes a position error.

All conjunctions of this satellite