SDA_1681, 65991
Orbit data source: Space-Track
SDA_1681, 65991 is a payload satellite owned by SDA (US) in LEO that was launched on Wed, 15 Oct 2025 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.
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65991 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
LMSSD/TERRAN
Mission
Operational Defense Communications
Bus & Motor
LM-T1TL, Unknown motor
Mass
~400 kg wet, ~400 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 2 Pan, 1.8 m
Radar Cross Section
0.674 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 12 hours ago
TLE from 12 hours ago
0 SDA_1681
1 65991U 25230T 26171.38239457 .00000121 00000-0 95974-4 0 9992
2 65991 81.2994 208.5818 0004223 173.9562 186.1647 13.85304657 34261Epoch: 2026-06-20T09:10Z
TLE epoch observation values (Epoch: 2026-06-20T09:10:38.890Z)
Latitude
-0.00004°
Longitude
162.32193°
Altitude
951.074 km
Speed
7.375 km/s
True Right ascension
13h 54m 19s
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
08:33:37
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
945.428 km
Perigee altitude
939.245 km
Semi-major axis
7,320.474 km
Eccentricity
0.00042
Inclination
81.2994°
RAAN
208.5818°
Arg. of periapsis
173.9562°
True anomaly
186.15951°
Mean anomaly
186.1647°
Eccentric anomaly
186.1621°
Mean motion
3.46525 °/min
Orbital period
103.89 mins
BSTAR
0.000095974
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Other satellites on launch #230 in the year 2025 (2025-10-15 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.SDA_1681 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. |
|---|---|---|---|---|---|---|---|
| 11 mins | 2026-06-21 02:36:39.494Z | 158.748° S | 2026-06-21 02:42:39.494Z | 79.612° E | 32.757° | 2026-06-21 02:47:39.494Z | 24.506° NE |
| 8 mins | 2026-06-21 04:23:39.494Z | 241.831° WSW | 2026-06-21 04:27:39.494Z | 296.52° NW | 25.099° | 2026-06-21 04:31:39.494Z | 342.813° N |
| 9 mins | 2026-06-21 13:30:39.494Z | 16.947° NNE | 2026-06-21 13:34:39.494Z | 78.535° E | 31.22° | 2026-06-21 13:39:39.494Z | 139.145° SSE |
| 8 mins | 2026-06-21 15:15:39.494Z | 319.257° NNW | 2026-06-21 15:19:39.494Z | 263.103° W | 26.376° | 2026-06-21 15:23:39.494Z | 216.449° SW |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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