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LEO EXPRESS 3

In orbit NORAD 66687 HSIP-4826-4306-9169-8017

Observations 0
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Falcon 9 Block 5 | Transporter 15 (Dedicated SSO Rideshare)

Falcon 9 Block 5

Carrier rocket

Space Launch Complex 4E

Spaceport

0

Observations all time

Mission information
Spacecraft name
LEO EXPRESS 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
Falcon 9 Block 5 | Transporter 15 (Dedicated SSO Rideshare)
Carrier rocket
Falcon 9 Block 5
Spaceport
Space Launch Complex 4E
Launch time
Separation time
Satellite appearance
Data for the last 30 days
Orbital parameters of the satellite
Perigee
489.69 km
Apogee
496.69 km
Inclination
97.4°
Period
94.5 min
Semi-major axis
6871.3 km
Velocity
7.6 km/s
Orbital elements
TLE source
Celestrak
TLE updated
2026-10-14 14:09:04 UTC
Two-line elements (TLE)
1 66687U 25276X   26287.16623063  .00012389  00000-0  52628-3 0  9996
2 66687  97.4152 359.2866 0005094  97.4326 262.7490 15.23189783 48527
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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
2026-10-16 02:53:54 LEO EXPRESS 3
NORAD 66687 		TRANSPORTER-15 OBJECT DM
NORAD 66773 		4.188 0.01 2.5e-07
2026-10-16 09:27:38 OBJECT A
NORAD 58849 		LEO EXPRESS 3
NORAD 66687 		1.321 14.88 1.0e-06
2026-10-16 14:42:17 WORLDVIEW-1 (WV-1)
NORAD 32060 		LEO EXPRESS 3
NORAD 66687 		2.964 5.89 4.7e-07
2026-10-16 22:10:29 ION SCV-017
NORAD 63230 		LEO EXPRESS 3
NORAD 66687 		4.269 15.09 8.6e-08
2026-10-17 11:12:53 GAOFEN-14 02
NORAD 66175 		LEO EXPRESS 3
NORAD 66687 		3.473 0.30 3.7e-07
2026-10-17 13:07:33 LEO EXPRESS 3
NORAD 66687 		DRISHTI
NORAD 69010 		4.770 15.10 6.9e-08
2026-10-18 02:58:52 LEO EXPRESS 3
NORAD 66687 		FLOCK 4H-17
NORAD 66720 		4.029 0.09 2.7e-07
2026-10-19 04:44:26 YAOGAN-39 03B
NORAD 57988 		LEO EXPRESS 3
NORAD 66687 		3.666 12.72 2.0e-07
2026-10-19 21:04:18 YAOGAN-36 04A
NORAD 54746 		LEO EXPRESS 3
NORAD 66687 		3.578 13.69 1.8e-07
2026-10-20 13:30:10 STARLINK-5613
NORAD 55752 		LEO EXPRESS 3
NORAD 66687 		2.895 5.22 1.5e-05
2026-10-20 14:00:48 STARLINK-5545
NORAD 56476 		LEO EXPRESS 3
NORAD 66687 		3.914 10.98 6.4e-06

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