STARLINK-3251, 49729
Orbit data source: Space-Track
STARLINK-3251, 49729 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Thu, 02 Dec 2021 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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49729 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
SpaceX/Seattle
Mission
Operational Commercial Communications
Bus & Motor
STARLINK, Unknown motor
Mass
290 kg wet, ~270 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 1 Pan, 10.1 m
Radar Cross Section
13.562 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 2 days ago
TLE from 2 days ago
0 STARLINK-3251
1 49729U 21115F 26170.96725935 -.00000239 00000-0 30946-5 0 9995
2 49729 53.1608 59.7551 0001195 83.1842 276.9286 15.08835466250834Epoch: 2026-06-19T23:12Z
TLE epoch observation values (Epoch: 2026-06-19T23:12:51.207Z)
Latitude
0.00001°
Longitude
163.3531°
Altitude
540.549 km
Speed
7.593 km/s
True Right ascension
03h 59m 01s
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
21:31:11
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
540.838 km
Perigee altitude
539.185 km
Semi-major axis
6,918.148 km
Eccentricity
0.00012
Inclination
53.1608°
RAAN
59.7551°
Arg. of periapsis
83.1842°
True anomaly
276.91501°
Mean anomaly
276.9286°
Eccentric anomaly
276.9218°
Mean motion
3.77188 °/min
Orbital period
95.44 mins
BSTAR
0.0000030946
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Other satellites on launch #115 in the year 2021 (2021-12-02 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-3251 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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2026-06-22 18:08:10.741Z | 210.491° SW | 2026-06-22 18:12:10.741Z | 128.364° SE | 37.695° | 2026-06-22 18:15:10.741Z | 62.559° ENE |
| 5 mins | 2026-06-22 19:49:10.741Z | 282.68° WNW | 2026-06-22 19:51:10.741Z | 321.546° NNW | 24.754° | 2026-06-22 19:54:10.741Z | 24.649° NE |
| 6 mins | 2026-06-23 00:50:10.741Z | 324.697° NNW | 2026-06-23 00:53:10.741Z | 52.786° ENE | 37.07° | 2026-06-23 00:56:10.741Z | 109.233° ESE |
| 4 mins | 2026-06-23 02:30:10.741Z | 266.54° W | 2026-06-23 02:32:10.741Z | 226.149° WSW | 20.645° | 2026-06-23 02:34:10.741Z | 189.689° SSW |
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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