About Gravity Probe B
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 28230U 04014A 26013.52514431 .00000617 00000-0 73955-4 0 9998
2 28230 89.8418 53.1814 0003284 97.3764 262.7834 14.82990986629421
Epoch: Jan 13, 2026 •
Age: 10 hours
Current Status
Altitude 621.8 km
Velocity 7.55 km/s
Sub-Earth Point 23.05°N,
134.29°E
Launch Date Apr 20, 2004
Age 21.7 years
Type other
Technical Details
Classification Payload
Mass 3145.00 kg
Dry Mass 2805.00 kg
Total Mass 3145.00 kg
Length 6.40 m
Diameter 2.60 m
Span 6.40 m
Shape Ell + Ant + 4 Pan
Manufacturer LMMS/STAN
Phase Status In Orbit
Owner/State MSFC/US
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