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FLOCK 4H-17

In orbit NORAD 66720 IXHD-6929-1927-2499-0458

Observations 0
Satellite appearance

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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-17
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
499.17 km
Apogee
503.01 km
Inclination
97.4°
Period
94.7 min
Semi-major axis
6879.2 km
Velocity
7.62 km/s
Orbital elements
TLE source
Celestrak
TLE updated
2026-04-01 16:48:55 UTC
Two-line elements (TLE)
1 66720U 25276BG  26091.48213646  .00015200  00000+0  69632-3 0  9991
2 66720  97.4269 166.5376 0002789 208.0278 152.0808 15.20568986 18785
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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
2026-10-14 12:40:11 YAOGAN-43 01E
NORAD 60462 		FLOCK 4H-17
NORAD 66720 		4.921 13.05 1.1e-07
2026-10-14 13:27:26 YAOGAN-43 01E
NORAD 60462 		FLOCK 4H-17
NORAD 66720 		2.163 13.03 5.6e-07
2026-10-14 22:51:30 STARLINK-6085
NORAD 57115 		FLOCK 4H-17
NORAD 66720 		0.268 13.02 1.1e-03
2026-10-15 19:26:50 PELICAN-8
NORAD 69018 		FLOCK 4H-17
NORAD 66720 		4.643 15.11 7.3e-08
2026-10-16 09:41:52 HERMES-6
NORAD 63489 		FLOCK 4H-17
NORAD 66720 		3.304 15.11 1.4e-07
2026-10-16 11:16:21 HERMES-6
NORAD 63489 		FLOCK 4H-17
NORAD 66720 		4.289 15.11 8.5e-08
2026-10-17 23:51:06 SCS-01 G
NORAD 63988 		FLOCK 4H-17
NORAD 66720 		4.574 0.09 2.1e-07
2026-10-18 01:25:07 LKW-1
NORAD 43034 		FLOCK 4H-17
NORAD 66720 		2.675 5.79 5.8e-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