STARLINK-3121, 49428
Orbit data source: Space-Track
STARLINK-3121, 49428 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Sat, 13 Nov 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
49428 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: 1 week ago
TLE from 1 week ago
0 STARLINK-3121
1 49428U 21104W 26154.30145169 -.00000324 00000-0 -22823-5 0 9995
2 49428 53.1815 204.6872 0001388 37.0637 323.0450 15.08830164251569Epoch: 2026-06-03T07:14Z
TLE epoch observation values (Epoch: 2026-06-03T07:14:05.426Z)
Latitude
-0.00003°
Longitude
-155.59746°
Altitude
539.9 km
Speed
7.594 km/s
True Right ascension
13h 38m 44s
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
14:51:32
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
540.984 km
Perigee altitude
539.064 km
Semi-major axis
6,918.161 km
Eccentricity
0.00014
Inclination
53.1815°
RAAN
204.6872°
Arg. of periapsis
37.0637°
True anomaly
323.03544°
Mean anomaly
323.045°
Eccentric anomaly
323.04022°
Mean motion
3.77187 °/min
Orbital period
95.44 mins
BSTAR
-0.0000022823
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 #104 in the year 2021 (2021-11-13 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-3121 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. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2026-06-11 04:38:51.854Z | 273.193° WNW | 2026-06-11 04:41:51.854Z | 329.105° NNW | 26.235° | 2026-06-11 04:44:51.854Z | 28.411° NE |
| 6 mins | 2026-06-11 09:40:51.854Z | 329.022° NNW | 2026-06-11 09:42:51.854Z | 15.16° NNE | 35.161° | 2026-06-11 09:46:51.854Z | 107.725° ESE |
| 4 mins | 2026-06-11 11:20:51.854Z | 263.943° W | 2026-06-11 11:22:51.854Z | 219.138° SW | 22.045° | 2026-06-11 11:24:51.854Z | 183.803° SSW |
| 6 mins | 2026-06-12 02:50:51.854Z | 212.706° SW | 2026-06-12 02:53:51.854Z | 126.357° SE | 41.04° | 2026-06-12 02:56:51.854Z | 58.748° ENE |
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 |
|---|