SEA LAUNCH DEMO, 25661
Orbit data source: Space-Track
SEA LAUNCH DEMO, 25661 is a payload satellite owned by SeaLaunch (US) in HEO that was launched on Sun, 28 Mar 1999 UTC via a ZENIT-3SL launch vehicle from the Sea Launch (SEAL). 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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25661 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
Unknown / SEALRelated business
Manufacturer
Boeing/Kent
Mission
Commercial Technology
Bus & Motor
HS-702 MODEL, Unknown motor
Mass
4,700 kg wet, 4,700 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Irr, 2.5 m
Radar Cross Section
37.500 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 1 day ago
TLE from 1 day ago
0 SEA LAUNCH DEMO
1 25661U 99014A 25348.52189602 -.00000083 00000-0 55445-3 0 9996
2 25661 1.4166 26.1578 7162547 197.3747 111.4446 2.23256289217986Epoch: 2025-12-14T12:31Z
TLE epoch observation values (Epoch: 2025-12-14T12:31:31.816Z)
Latitude
0.00004°
Longitude
114.78504°
Altitude
31,617.56 km
Speed
2.205 km/s
True Right ascension
01h 44m 24s
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
13:25:38
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
36,071.437 km
Perigee altitude
639.975 km
Semi-major axis
24,733.843 km
Eccentricity
0.71625
Inclination
1.4166°
RAAN
26.1578°
Arg. of periapsis
197.3747°
True anomaly
162.52557°
Mean anomaly
111.4446°
Eccentric anomaly
138.58944°
Mean motion
0.55796 °/min
Orbital period
645.2 mins
BSTAR
0.00055445
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Other satellites on launch #14 in the year 1999 (1999-03-28 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.SEA LAUNCH DEMO Visibility
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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. |
|---|---|---|---|---|---|---|---|
| SEA LAUNCH DEMO is likely not visible in the next few days. |
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 |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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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 |
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