SKYNET 1, 4250
Orbit data source: Space-Track
SKYNET 1, 4250 is a payload satellite owned by UK MoD (UK) in GEO that was launched on Sat, 22 Nov 1969 UTC via a THOR DELTA M 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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4250 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
UKRelated business
Manufacturer
Philco-Ford
Mission
Non-operational Defense Communications
Bus & Motor
SKYNET, STAR 17A
Mass
243 kg wet, 107 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cyl, 0.7 m
Radar Cross Section
1.131 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 17 hours ago
TLE from 17 hours ago
0 SKYNET 1
1 04250U 69101A 25242.43412515 -.00000087 00000-0 00000-0 0 9994
2 04250 0.3216 276.6533 0025197 317.1838 156.5460 1.00275721131605Epoch: 2025-08-30T10:25Z
TLE epoch observation values (Epoch: 2025-08-30T10:25:08.412Z)
Latitude
0.27638°
Longitude
-104.65951°
Altitude
35,882.161 km
Speed
3.068 km/s
True Right ascension
02h 01m 58s
True Declination
0° 16' 34"
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
18:40:22
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
35,892.804 km
Perigee altitude
35,680.32 km
Semi-major axis
42,164.699 km
Eccentricity
0.00252
Inclination
0.3216°
RAAN
276.6533°
Arg. of periapsis
317.1838°
True anomaly
156.66059°
Mean anomaly
156.546°
Eccentric anomaly
156.60333°
Mean motion
0.25068 °/min
Orbital period
1,436.09 mins
BSTAR
0
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Other satellites on launch #101 in the year 1969 (1969-11-22 UTC)
SKYNET 1 Visibility forecast
Observer location: undefined°, undefined°
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. |
|---|---|---|---|---|---|---|---|
| 1440 mins | 2025-08-31 03:02:38.229Z | 179.121° S | 2025-08-31 09:06:38.229Z | 179.138° S | 34.874° | 2025-09-01 03:02:38.229Z | 179.094° S |
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4250 neighbors
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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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