INTELSAT 3-F4
NORAD 3947
Payload
GEO
1969-045A
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GEO · NORAD 3947
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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
38821 km
Apogee
39022 km
Inclination
3.4°
Period
1599.2 min
Mean Motion
0.90044964 rev/day
TLE Epoch
2026-10-21 06:00:00 UTC
📐 Computed Orbital Characteristics
Avg. Altitude38,922 km
Orbital Velocity10,680 km/h
Velocity2.97 km/s
Orbital Period26.7 hours
Orbits / Day0.90
Eccentricity0.0022
Semi-Major Axis45,293 km
Est. Orbital LifetimePermanent — geostationary orbit, no atmospheric drag
🚀 Launch & Identity
Country / Operator
INTELSAT (ITSO)
Launch Date
1969-05-22
Launch Site
Cape Canaveral Space Force Station, United States
Int'l Designator
1969-045A
Object Type
Payload
RCS Size
Large (>1 m²)
🔗 Constellation / Groups
intelsat
📖 About This Object
INTELSAT 3-F4 is an active satellite operated by INTELSAT (ITSO), launched on 1969-05-22 from Cape Canaveral Space Force Station, United States on the INTELSAT III F-4 launch. After more than 57 years in orbit, it is one of the longest-surviving objects in the space catalogue. It orbits in Geostationary Orbit (GEO) at altitudes between 38,821 km and 39,022 km with an inclination of 3.4°. It travels at approximately 10,680 km/h (2.97 km/s), completing one full orbit every 26.7 hours — that’s roughly 0.90 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 3-F4 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 3-F4 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 3.4°, 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 3-F4’s average altitude, there are currently 2 active payloads and 0 tracked debris or rocket body fragments. ITSO operates approximately 91 active satellites in total, of which 2 share a similar altitude band with INTELSAT 3-F4.
🔗 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 3-F4 orbits at approximately 38,922 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 10,680 km/h — it just keeps pace with the ground below. With an inclination of 3.4°, it actually traces a small figure-of-eight pattern rather than remaining perfectly fixed. Learn more about geostationary orbits.
INTELSAT 3-F4 is operated by INTELSAT (ITSO). It is catalogued by the U.S. Space Surveillance Network under NORAD ID 3947. You can track INTELSAT 3-F4 in real time on Orbital Radar’s live tracker or browse all operators in the operator directory.
INTELSAT 3-F4 was launched on 1969-05-22 from Cape Canaveral Space Force Station, United States, 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 3-F4 (NORAD ID 3947) using the latest TLE (two-line element set) orbital data in its live tracking catalogue (see our data sources). 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 3-F4 travels at approximately 10,680 km/h (6,636 mph) — roughly 2.97 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 3-F4 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.