USA 8
NORAD 15543
Payload
GEO
1985-010B
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GEO · NORAD 15543
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Altitude (km)
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Speed (km/s)
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Latitude
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Longitude
🛰️ Orbital Parameters
Perigee
35366 km
Apogee
36464 km
Inclination
12.7°
Period
1442.7 min
Mean Motion
0.99814578 rev/day
TLE Epoch
2026-06-19 14:00:00 UTC
📐 Computed Orbital Characteristics
Avg. Altitude35,915 km
Orbital Velocity11,053 km/h
Velocity3.07 km/s
Orbital Period~24 hours (geosynchronous)
Orbits / Day1.00
Eccentricity0.0130
Semi-Major Axis42,286 km
Est. Orbital LifetimePermanent — geostationary orbit, no atmospheric drag
🚀 Launch & Identity
Country / Operator
🇺🇸 United States
Launch Date
1985-01-24
Launch Site
Cape Canaveral, Florida
Int'l Designator
1985-010B
Object Type
Payload
RCS Size
Unknown
📖 About This Object
USA 8 is an active satellite operated by United States, launched on 1985-01-24 from Cape Canaveral, Florida. With over 41 years in orbit, it has far exceeded many satellites’ design lifetimes. It orbits in Geostationary Orbit (GEO) at altitudes between 35,366 km and 36,464 km with an inclination of 12.7°. It travels at approximately 11,053 km/h (3.07 km/s), completing one full orbit every ~24 hours (geosynchronous) — that’s roughly 1.00 orbits per day. At geostationary altitude, there is no meaningful atmospheric drag — this object will remain in orbit indefinitely unless actively deorbited. Orbital Radar tracks USA 8 in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.
🌍 Orbit Context
USA 8 occupies geostationary orbit at approximately 35,786 km above the equator, where its orbital period matches the Earth’s 24-hour rotation. From the ground, it appears to hover over a fixed point — ideal for broadcast television, weather monitoring and wideband communications. With an inclination of 12.7°, it traces a small figure-of-eight pattern relative to the equator rather than remaining perfectly stationary, which can indicate aging stationkeeping fuel or a deliberate inclined-orbit strategy. Within ±50 km of USA 8’s average altitude, there are currently 64 active payloads and 16 tracked debris or rocket body fragments. United States operates approximately 12,360 active satellites in total, of which 19 share a similar altitude band with USA 8.
❓ Frequently Asked Questions
USA 8 orbits at approximately 35,915 km altitude, where the orbital period matches the Earth’s 24-hour rotation. This means it stays above the same point on the equator at all times. Its actual speed is still 11,053 km/h — it just keeps pace with the ground below. With an inclination of 12.7°, it actually traces a small figure-of-eight pattern rather than remaining perfectly fixed. Learn more about geostationary orbits.
USA 8 is operated by United States. It is catalogued by the U.S. Space Surveillance Network under NORAD ID 15543. You can track USA 8 in real time on Orbital Radar’s live tracker or browse all operators in the operator directory.
USA 8 was launched on 1985-01-24 from Cape Canaveral, Florida, one of the busiest launch facilities in the world, operated by NASA and the U.S. Space Force on Florida’s Atlantic coast. View the full satellite launch log.
Yes — Orbital Radar tracks USA 8 (NORAD ID 15543) using the latest TLE (two-line element set) data from Space-Track and CelesTrak. Open the live tracker to see its current position, altitude, speed and orbital path updated in real time. You can also browse the satellite directory to find other tracked objects.
USA 8 travels at approximately 11,053 km/h (6,868 mph) — roughly 3.07 km/s. Despite this high speed, it appears stationary from the ground because it matches the Earth’s rotation. Geostationary satellites are actually slower than LEO satellites because orbital velocity decreases with altitude.