About STEX
Group: 3 satellites
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Live Position
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Upcoming Passes
Altitude History
Altitude vs Time
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Two-Line Element Set
1 25489U 98055A 25324.12596582 .00000749 00000-0 18178-3 0 9997
2 25489 84.9811 100.1580 0010060 41.0866 319.1092 14.51573769433001
Epoch: Nov 20, 2025 •
Age: 21 hours
Current Status
Altitude 728.3 km
Velocity 7.49 km/s
Sub-Earth Point 4.56°N,
136.2°W
Launch Date Oct 3, 1998
Age 27.1 years
Type other
Technical Details
Classification Payload
Mass 671.00 kg
Dry Mass 510.00 kg
Total Mass 671.00 kg
Length 2.00 m
Diameter 1.20 m
Span 5.00 m
Shape Box + 2 Pan
Manufacturer LMA/DENV
Bus Type STEX
Phase Status In Orbit
Owner/State NROC/US
Large Constellations
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