FLOCK 4Y 21, 55077 (Decayed)
Orbit data source: Space-Track
FLOCK 4Y 21, 55077 was a payload satellite owned by Planet (US) in LEO that was launched on Tue, 03 Jan 2023 UTC via an FALCON 9 launch vehicle from the Air Force Eastern Test Range (AFETR). 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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55077 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
Planet
Mission
Decayed 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
0.108 m², Medium (>0.1 m² and < 1m²)
Expand to show TLE details & historyLast TLE update: 3 months ago
TLE from 3 months ago
0 FLOCK 4Y 21
1 55077U 23001BW 25264.18013782 .05957337 24477-5 17947-2 0 9997
2 55077 97.3519 343.0372 0013366 242.3316 117.6621 16.26748027152120Epoch: 2025-09-21T04:19Z
TLE epoch observation values (Epoch: 2025-09-21T04:19:23.907Z)
Latitude
0.00001°
Longitude
-82.11479°
Altitude
208.622 km
Speed
7.779 km/s
True Right ascension
22h 52m 08s
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
17:50:05
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
206.906 km
Perigee altitude
189.327 km
Semi-major axis
6,576.253 km
Eccentricity
0.00134
Inclination
97.3519°
RAAN
343.0372°
Arg. of periapsis
242.3316°
True anomaly
117.79765°
Mean anomaly
117.6621°
Eccentric anomaly
117.72989°
Mean motion
4.06982 °/min
Orbital period
88.46 mins
BSTAR
0.0017947
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Other satellites on launch #1 in the year 2023 (2023-01-03 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 4Y 21 Visibility
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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. |
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| This satellite is decayed. |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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