Find USA 21
NORAD ID: 17506 • Int'l Des: 1987-015 • Owner: NRO/SAFSP • Country: US
MEOELLIPTICALHEO_ELLIPTICALSEMI_SYNCMOLNIYA
Historical Position — Feb 14, 2026
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About USA 21
USA 21 (NORAD 17506) is a satellite launched Feb 12, 1987 by NRO/SAFSP of US. It operates in MEO, ELLIPTICAL, HEO_ELLIPTICAL, SEMI_SYNC, MOLNIYA orbit with a mass of 800.00 kg. Last tracked position: Feb 14, 2026.
Altitude History
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Y: Altitude (km)
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Two-Line Element Set
1 17506U 87015A 26045.14445649 -.00000778 00000-0 -21159-2 0 9998
2 17506 62.9671 273.1681 7275603 278.0632 12.4511 2.01482512 42766
Epoch: Feb 14, 2026 •
Age: 3511 hours
Current Status
Position data unavailable
Launch Date Feb 12, 1987
Age 39.4 years
Type military
Technical Details
Classification Payload
Mass 800.00 kg
Dry Mass 650.00 kg
Total Mass 800.00 kg
Length 7.00 m
Diameter 2.40 m
Span 7.00 m
Shape Cyl + 2 Dish
Manufacturer HSES
Bus Type SDS
Phase Status In Orbit
Owner/State NRO/SAFSP/US
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