ARGOS, 25634
Orbit data source: Space-Track
ARGOS, 25634 is a payload satellite owned by USAF SMC/TEV (US) in SSO that was launched on Tue, 23 Feb 1999 UTC via a DELTA 7920-10 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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25634 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
Boeing/Seal Beach
Mission
Civil Science
Bus & Motor
P91-1, Unknown motor
Mass
2,490 kg wet, ~2,490 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 1 Pan, 8.0 m
Radar Cross Section
16.445 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 2 days ago
TLE from 2 days ago
0 ARGOS
1 25634U 99008A 26154.52845181 .00000070 00000-0 52618-4 0 9991
2 25634 98.5117 121.1235 0011331 80.8983 279.3475 14.19986482412368Epoch: 2026-06-03T12:40Z
TLE epoch observation values (Epoch: 2026-06-03T12:40:58.236Z)
Latitude
-0.00009°
Longitude
38.89509°
Altitude
827.002 km
Speed
7.44 km/s
True Right ascension
08h 04m 29s
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
19:44:52
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
830.707 km
Perigee altitude
814.389 km
Semi-major axis
7,200.685 km
Eccentricity
0.00113
Inclination
98.5117°
RAAN
121.1235°
Arg. of periapsis
80.8983°
True anomaly
279.21935°
Mean anomaly
279.3475°
Eccentric anomaly
279.28343°
Mean motion
3.55208 °/min
Orbital period
101.35 mins
BSTAR
0.000052618
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Other satellites on launch #8 in the year 1999 (1999-02-23 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.ARGOS 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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2026-06-05 10:54:59.053Z | 6.778° NNE | 2026-06-05 10:59:59.053Z | 259.188° W | 42.271° | 2026-06-05 11:03:59.053Z | 206.264° SW |
| 7 mins | 2026-06-05 20:38:59.053Z | 106.324° ESE | 2026-06-05 20:41:59.053Z | 63.953° ENE | 21.699° | 2026-06-05 20:45:59.053Z | 14.384° NNE |
| 8 mins | 2026-06-05 22:17:59.053Z | 195.078° SSW | 2026-06-05 22:21:59.053Z | 266.014° W | 34.71° | 2026-06-05 22:25:59.053Z | 329.063° NNW |
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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