FLOCK 4H 26, 66729
Orbit data source: Space-Track
FLOCK 4H 26, 66729 is a payload satellite owned by Planet (US) in SSO that was launched on Fri, 28 Nov 2025 UTC via an FALCON 9 launch vehicle from the Air Force Western Test Range (AFWTR). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.
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66729 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
Planet
Mission
Operational Commercial Imaging
Bus & Motor
CUBESAT 3U, Unknown motor
Mass
5.7 kg wet, 5.7 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 2 Pan, 1.0 m
Radar Cross Section
0.072 m², Medium (>0.1 m² and < 1m²)
Expand to show TLE details & historyLast TLE update: 22 hours ago
TLE from 22 hours ago
0 FLOCK 4H 26
1 66729U 25276BR 26238.15722730 .00006191 00000-0 28749-3 0 9990
2 66729 97.4152 310.4048 0006427 118.9158 241.2723 15.20350565 41044Epoch: 2026-08-26T03:46Z
TLE epoch observation values (Epoch: 2026-08-26T03:46:24.438Z)
Latitude
-0°
Longitude
-80.61128°
Altitude
510.002 km
Speed
7.608 km/s
True Right ascension
20h 41m 37s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
17:11:19
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
506.17 km
Perigee altitude
497.326 km
Semi-major axis
6,879.885 km
Eccentricity
0.00064
Inclination
97.4152°
RAAN
310.4048°
Arg. of periapsis
118.9158°
True anomaly
241.20774°
Mean anomaly
241.2723°
Eccentric anomaly
241.24002°
Mean motion
3.80339 °/min
Orbital period
94.65 mins
BSTAR
0.00028749
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Other satellites on launch #276 in the year 2025 (2025-11-28 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.FLOCK 4H 26 Visibility forecast
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Span | Click to sort rows by Start time (UTC) header in descending order | Start Az. | Max El. time (UTC) | Max El. Az. | Max El. | End time (UTC) | End Az. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2026-08-27 05:10:30.881Z | 183.093° SSW | 2026-08-27 05:13:30.881Z | 280.477° WNW | 39.636° | 2026-08-27 05:16:30.881Z | 338.585° N |
| 5 mins | 2026-08-27 18:15:30.881Z | 340.412° N | 2026-08-27 18:17:30.881Z | 280.572° WNW | 30.852° | 2026-08-27 18:20:30.881Z | 220.52° SW |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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