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FLOCK 4H-20

In orbit NORAD 66723 HULQ-4021-0667-1394-7549

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
FLOCK 4H-20
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
494.64 km
Apogee
496.37 km
Inclination
97.4°
Period
94.6 min
Semi-major axis
6873.6 km
Velocity
7.61 km/s
Orbital elements
TLE source
Celestrak
TLE updated
2026-10-12 05:08:36 UTC
Two-line elements (TLE)
1 66723U 25276BK  26284.44375588  .00011223  00000-0  48804-3 0  9998
2 66723  97.4121 356.7211 0001271 229.7806 130.3319 15.22428726 47370
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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
2026-10-12 12:54:30 STARLINK-4374
NORAD 53652 		FLOCK 4H-20
NORAD 66723 		3.448 14.87 4.3e-06
2026-10-13 07:44:00 TOMORROW-S8
NORAD 66308 		FLOCK 4H-20
NORAD 66723 		2.130 14.08 4.8e-07
2026-10-13 08:42:44 FLOCK 4H-20
NORAD 66723 		ELECTRON KICK STAGE R/B
NORAD 45728 		3.764 13.94 1.6e-07
2026-10-14 16:40:38 FLOCK 4H-20
NORAD 66723 		SELENE
NORAD 69020 		4.334 15.10 8.4e-08
2026-10-14 17:55:49 FLOCK 4H-20
NORAD 66723 		OBJECT AC
NORAD 67274 		3.002 0.06 4.9e-07
2026-10-14 20:25:20 FLOCK 4H-20
NORAD 66723 		IRIDIUM 33 DEB
NORAD 46971 		3.164 15.17 1.5e-07
2026-10-14 21:12:39 FLOCK 4H-20
NORAD 66723 		IRIDIUM 33 DEB
NORAD 46971 		1.691 15.20 5.2e-07
2026-10-14 22:00:00 FLOCK 4H-20
NORAD 66723 		IRIDIUM 33 DEB
NORAD 46971 		3.192 15.18 1.5e-07
2026-10-15 08:26:53 YAOGAN-39 05A
NORAD 58557 		FLOCK 4H-20
NORAD 66723 		2.994 8.17 4.3e-07
2026-10-15 10:21:46 FLOCK 4H-20
NORAD 66723 		NOAA 16 DEB
NORAD 41267 		2.842 14.46 2.4e-07
2026-10-15 10:28:14 CSC-2
NORAD 58021 		FLOCK 4H-20
NORAD 66723 		3.497 0.64 3.6e-07
2026-10-15 11:56:26 FLOCK 4H-20
NORAD 66723 		NOAA 16 DEB
NORAD 41267 		3.707 14.46 1.4e-07
2026-10-15 12:02:56 SCS-01 L
NORAD 63992 		FLOCK 4H-20
NORAD 66723 		3.605 0.27 3.4e-07
2026-10-15 15:12:44 PEXT (BARD)
NORAD 64874 		FLOCK 4H-20
NORAD 66723 		4.974 1.25 1.8e-07
2026-10-15 19:09:18 FLOCK 4H-20
NORAD 66723 		FLOCK 4H-30
NORAD 66733 		4.989 0.07 1.8e-07
2026-10-16 11:16:02 FLOCK 4H-20
NORAD 66723 		HYDRA-3
NORAD 69022 		4.621 15.10 7.4e-08
2026-10-16 18:01:51 FLOCK 4H-20
NORAD 66723 		FLOCK 4H-36
NORAD 66739 		2.094 0.02 1.0e-06
2026-10-17 17:04:10 FLOCK 4H-20
NORAD 66723 		COSMOS 2251 DEB
NORAD 34451 		4.878 15.12 6.5e-08
2026-10-18 01:10:18 FGN-100-D2
NORAD 66299 		FLOCK 4H-20
NORAD 66723 		2.515 14.44 3.1e-07
2026-10-18 01:57:37 FGN-100-D2
NORAD 66299 		FLOCK 4H-20
NORAD 66723 		3.330 14.43 1.8e-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