STARLINK-3155, 49739
Orbit data source: Space-Track
STARLINK-3155, 49739 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.
Focus sentinelFocus sentinel
Request partner network tasking
Focus sentinelFocus sentinel
Embed this page
Focus sentinelFocus sentinel
49739 intel report (Beta)
Focus sentinelFocus sentinel
Edit Public Description
Focus sentinelFocus sentinel
Edit Sat Name
Focus sentinelFocus sentinel
Create New Watchlist
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-3155
1 49739U 21115R 26171.39784041 -.00000307 00000-0 -12023-5 0 9990
2 49739 53.1620 57.9315 0001529 88.0631 272.0535 15.08830343250897Epoch: 2026-06-20T09:32Z
TLE epoch observation values (Epoch: 2026-06-20T09:32:53.411Z)
Latitude
-0.00006°
Longitude
6.09586°
Altitude
540.627 km
Speed
7.593 km/s
True Right ascension
03h 51m 43s
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
21:33:48
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
541.084 km
Perigee altitude
538.969 km
Semi-major axis
6,918.164 km
Eccentricity
0.00015
Inclination
53.162°
RAAN
57.9315°
Arg. of periapsis
88.0631°
True anomaly
272.03599°
Mean anomaly
272.0535°
Eccentric anomaly
272.04475°
Mean motion
3.77187 °/min
Orbital period
95.44 mins
BSTAR
-0.0000012023
Loading maneuver chart data...
Computing Atmospheric mass density...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Other satellites on launch #115 in the year 2021 (2021-12-02 UTC)
Did you know?
You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.STARLINK-3155 Visibility forecast
Loading observer location...
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. |
|---|---|---|---|---|---|---|---|
| 4 mins | 2026-06-22 17:20:46.584Z | 161.191° S | 2026-06-22 17:22:46.584Z | 126.324° SE | 17.374° | 2026-06-22 17:24:46.584Z | 92.069° ESE |
| 6 mins | 2026-06-22 18:58:46.584Z | 245.71° WSW | 2026-06-22 19:01:46.584Z | 328.107° NNW | 40.992° | 2026-06-22 19:04:46.584Z | 41.122° NE |
| 5 mins | 2026-06-23 00:00:46.584Z | 341.632° N | 2026-06-23 00:02:46.584Z | 21.184° NNE | 22.789° | 2026-06-23 00:05:46.584Z | 77.186° E |
| 6 mins | 2026-06-23 01:39:46.584Z | 300.678° NW | 2026-06-23 01:42:46.584Z | 204.748° SW | 41.344° | 2026-06-23 01:45:46.584Z | 144.806° SSE |
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 |
|---|
CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
Authenticating...
Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in descending order |
|---|