INTELSAT 511
NORAD 15873
Payload
GEO
1985-055A
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GEO · NORAD 15873
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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
35775 km
Apogee
35892 km
Inclination
13.2°
Period
1438.5 min
Mean Motion
1.00103443 rev/day
TLE Epoch
2026-06-19 20:00:00 UTC
📐 Computed Orbital Characteristics
Avg. Altitude35,834 km
Orbital Velocity11,063 km/h
Velocity3.07 km/s
Orbital Period~24 hours (geosynchronous)
Orbits / Day1.00
Eccentricity0.0014
Semi-Major Axis42,205 km
Est. Orbital LifetimePermanent — geostationary orbit, no atmospheric drag
🚀 Launch & Identity
Country / Operator
Intelsat (ITSO)
Launch Date
1985-06-30
Launch Site
Cape Canaveral, Florida
Int'l Designator
1985-055A
Object Type
Payload
RCS Size
Large (>1 m²)
🔗 Constellation / Groups
intelsat
📖 About This Object
INTELSAT 511 is an active satellite operated by Intelsat (ITSO), launched on 1985-06-30 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 35,775 km and 35,892 km with an inclination of 13.2°. It travels at approximately 11,063 km/h (3.07 km/s), completing one full orbit every ~24 hours (geosynchronous) — that’s roughly 1.00 orbits per day. It is part of the Intelsat constellation group. At geostationary altitude, there is no meaningful atmospheric drag — this object will remain in orbit indefinitely unless actively deorbited. Orbital Radar tracks INTELSAT 511 in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.
🌍 Orbit Context
INTELSAT 511 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 13.2°, 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 INTELSAT 511’s average altitude, there are currently 673 active payloads and 55 tracked debris or rocket body fragments — notable neighbours include ASTRA 1N, GOES 16, TDRS 13. ITSO operates approximately 72 active satellites in total, of which 31 share a similar altitude band with INTELSAT 511.
🔗 Intelsat Communications
This satellite is operated by Intelsat, one of the pioneering commercial satellite operators, with a fleet of 50+ geostationary satellites providing television distribution, enterprise networking, mobility connectivity and government communications worldwide. Intelsat was founded in 1964 as an intergovernmental organisation and privatised in 2001.
❓ Frequently Asked Questions
INTELSAT 511 orbits at approximately 35,834 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 11,063 km/h — it just keeps pace with the ground below. With an inclination of 13.2°, it actually traces a small figure-of-eight pattern rather than remaining perfectly fixed. Learn more about geostationary orbits.
INTELSAT 511 is operated by Intelsat (ITSO). It is catalogued by the U.S. Space Surveillance Network under NORAD ID 15873. You can track INTELSAT 511 in real time on Orbital Radar’s live tracker or browse all operators in the operator directory.
INTELSAT 511 was launched on 1985-06-30 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 INTELSAT 511 (NORAD ID 15873) 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.
INTELSAT 511 travels at approximately 11,063 km/h (6,875 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.
INTELSAT 511 is a member of the Intelsat constellation. Satellites in this group work together to provide coordinated coverage, typically in similar orbital planes at comparable altitudes. You can view all Intelsat satellites on Orbital Radar’s live tracker.