STARLINK-3287, 50172
Orbit data source: Space-Track
STARLINK-3287, 50172 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Sat, 18 Dec 2021 UTC via an FALCON 9 launch vehicle from the Air Force Western Test Range (AFWTR). 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
50172 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: 5 hours ago
TLE from 5 hours ago
0 STARLINK-3287
1 50172U 21125S 26170.10892122 .00000593 00000-0 55352-4 0 9998
2 50172 53.1593 153.7255 0001347 81.8975 278.2169 15.08831968251949Epoch: 2026-06-19T02:36Z
TLE epoch observation values (Epoch: 2026-06-19T02:36:50.793Z)
Latitude
-0.00003°
Longitude
-152.82878°
Altitude
540.526 km
Speed
7.593 km/s
True Right ascension
10h 14m 54s
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
18:41:48
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
540.954 km
Perigee altitude
539.09 km
Semi-major axis
6,918.159 km
Eccentricity
0.00013
Inclination
53.1593°
RAAN
153.7255°
Arg. of periapsis
81.8975°
True anomaly
278.20162°
Mean anomaly
278.2169°
Eccentric anomaly
278.20926°
Mean motion
3.77188 °/min
Orbital period
95.44 mins
BSTAR
0.000055352
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 #125 in the year 2021 (2021-12-18 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-3287 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 | 2026-06-19 07:52:02.989Z | 334.077° NNW | 2026-06-19 07:54:02.989Z | 18.025° NNE | 30.377° | 2026-06-19 07:58:02.989Z | 99.271° ESE |
| 5 mins | 2026-06-19 09:32:02.989Z | 272.018° WNW | 2026-06-19 09:34:02.989Z | 217.386° SW | 28.251° | 2026-06-19 09:37:02.989Z | 165.878° S |
| 5 mins | 2026-06-20 01:03:02.989Z | 191.689° SSW | 2026-06-20 01:05:02.989Z | 132.471° SE | 34.67° | 2026-06-20 01:08:02.989Z | 66.087° ENE |
| 6 mins | 2026-06-20 02:42:02.989Z | 278.815° WNW | 2026-06-20 02:44:02.989Z | 318.949° NNW | 26.455° | 2026-06-20 02:48:02.989Z | 34.275° NE |
| 6 mins | 2026-06-20 07:43:02.989Z | 326.826° NNW | 2026-06-20 07:46:02.989Z | 47.099° ENE | 34.821° | 2026-06-20 07:49:02.989Z | 104.667° ESE |
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 |
|---|