TDRS 4

operational
NORAD ID: 19883 Int'l Des: 1989-021 Owner: GSFC Country: US
HEOCIRCULAR

About TDRS 4

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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 19883U 89021B 26016.52586465 -.00000186 00000-0 00000-0 0 9991
2 19883 12.8221 355.8798 0020287 306.7750 182.3422 0.98484137306554
Epoch: Jan 16, 2026 • Age: 7 hours

Current Status

Altitude 36264.3 km
Velocity 3.06 km/s
Sub-Earth Point -10.94°S, 176.87°E
Launch Date Mar 13, 1989
Age 36.8 years
Type other

Technical Details

Classification Payload
Mass 2245.00 kg
Dry Mass 1673.00 kg
Total Mass 2245.00 kg
Length 1.30 m
Diameter 2.40 m
Span 17.40 m
Shape Box + Dish + 2 Pan
Manufacturer TRW
Bus Type TDRS
Phase Status In Orbit
Owner/State GSFC/US

Large Constellations

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