STARLINK-6277, 56399
Orbit data source: Space-Track
STARLINK-6277, 56399 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Thu, 04 May 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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Identifier
Orbit
Country
USRelated business
Manufacturer
SpaceX/Seattle
Mission
Operational Commercial Communications
Bus & Motor
STARLINK, Unknown motor
Mass
305 kg wet, ~290 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 1 Pan, 10.1 m
Radar Cross Section
11.087 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 2 days ago
TLE from 2 days ago
0 STARLINK-6277
1 56399U 23061AB 26171.45320226 .00000020 00000-0 10242-4 0 9990
2 56399 43.0026 326.4609 0001059 269.9117 90.1613 15.27578192172590Epoch: 2026-06-20T10:52Z
TLE epoch observation values (Epoch: 2026-06-20T10:52:36.675Z)
Latitude
-0.00003°
Longitude
-105.35956°
Altitude
482.832 km
Speed
7.626 km/s
True Right ascension
21h 45m 50s
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
21:54:26
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
485.726 km
Perigee altitude
484.272 km
Semi-major axis
6,863.136 km
Eccentricity
0.00011
Inclination
43.0026°
RAAN
326.4609°
Arg. of periapsis
269.9117°
True anomaly
90.17344°
Mean anomaly
90.1613°
Eccentric anomaly
90.16737°
Mean motion
3.81733 °/min
Orbital period
94.31 mins
BSTAR
0.000010242
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Other satellites on launch #61 in the year 2023 (2023-05-04 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.STARLINK-6277 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 | 2026-06-22 13:18:21.275Z | 227.624° WSW | 2026-06-22 13:21:21.275Z | 172.145° S | 36.459° | 2026-06-22 13:24:21.275Z | 82.779° E |
| 5 mins | 2026-06-22 14:58:21.275Z | 275.907° WNW | 2026-06-22 15:00:21.275Z | 328.729° NNW | 40.174° | 2026-06-22 15:03:21.275Z | 67.839° E |
| 6 mins | 2026-06-22 16:37:21.275Z | 293.533° NW | 2026-06-22 16:39:21.275Z | 333.708° NNW | 38.357° | 2026-06-22 16:43:21.275Z | 88.239° E |
| 6 mins | 2026-06-22 18:16:21.275Z | 277.222° WNW | 2026-06-22 18:18:21.275Z | 234.803° WSW | 37.259° | 2026-06-22 18:22:21.275Z | 128.631° SE |
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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