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FORMOSAT 7-3

In orbit NORAD 44343 MLXO-9148-9336-0001-6454 Taiwan

Observations 0
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2019

Launch

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Observations all time

Mission information
Spacecraft name
FORMOSAT 7-3
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
2019-06-25 00:00:00
Separation time
Satellite appearance
Data for the last 30 days
Orbital parameters of the satellite
Perigee
539.07 km
Apogee
539.67 km
Inclination
24.0°
Period
95.3 min
Semi-major axis
6917.5 km
Velocity
7.6 km/s
Orbital elements
TLE source
Celestrak
TLE updated
2026-10-10 12:56:47 UTC
Two-line elements (TLE)
1 44343U 19036E   26283.21551831  .00003830  00000-0  20572-3 0  9997
2 44343  23.9982 106.3857 0000434 168.6063 191.4450 15.10533883400650
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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 23:33:54 FORMOSAT 7-3
NORAD 44343 		CZ-4B R/B
NORAD 33410 		4.977 11.62 1.2e-07
2026-10-12 06:42:57 FORMOSAT 7-3
NORAD 44343 		OBJECT F
NORAD 100614 		1.328 11.48 1.8e-06
2026-10-13 00:12:26 FORMOSAT 7-3
NORAD 44343 		LEMUR-2-LLOYD
NORAD 60577 		2.881 11.02 3.9e-07
2026-10-14 13:12:45 FORMOSAT 7-3
NORAD 44343 		COSMOS 2084
NORAD 20663 		3.227 9.64 9.7e-07
2026-10-15 23:10:58 FORMOSAT 7-3
NORAD 44343 		STARLINK-3631
NORAD 51790 		2.865 3.94 1.6e-05
2026-10-15 23:58:32 FORMOSAT 7-3
NORAD 44343 		STARLINK-3631
NORAD 51790 		3.645 3.94 9.7e-06
2026-10-16 08:44:14 FORMOSAT 7-3
NORAD 44343 		STARLINK-5921
NORAD 55926 		3.558 6.22 9.7e-06
2026-10-16 11:22:35 FORMOSAT 7-3
NORAD 44343 		RAAF M1
NORAD 43779 		4.841 11.53 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