SYNCOM 1
NORAD 553
Payload
MEO
1963-004A
● Active
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MEO · NORAD 553
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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
28692 km
Apogee
34863 km
Inclination
26.4°
Period
1236.2 min
Mean Motion
1.16484173 rev/day
TLE Epoch
2026-10-18 08:00:00 UTC
📐 Computed Orbital Characteristics
Avg. Altitude31,778 km
Orbital Velocity11,637 km/h
Velocity3.23 km/s
Orbital Period20 hours 36 minutes
Orbits / Day1.16
Eccentricity0.0809
Semi-Major Axis38,149 km
Est. Orbital LifetimeEffectively permanent — above atmospheric drag
🚀 Launch & Identity
Country / Operator
🇺🇸 GSFC (United States)
Launch Date
1963-02-14
Launch Site
Cape Canaveral Space Force Station, United States
Int'l Designator
1963-004A
Object Type
Payload
RCS Size
Medium (0.1–1 m²)
📖 About This Object
SYNCOM 1 is an active satellite operated by GSFC (United States), launched on 1963-02-14 from Cape Canaveral Space Force Station, United States on the Syncom 1 launch. After more than 63 years in orbit, it is one of the longest-surviving objects in the space catalogue. It orbits in Medium Earth Orbit (MEO) at altitudes between 28,692 km and 34,863 km with an inclination of 26.4°. It travels at approximately 11,637 km/h (3.23 km/s), completing one full orbit every 20 hours 36 minutes — that’s roughly 1.16 orbits per day. Orbital Radar tracks SYNCOM 1 in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.
🌍 Orbit Context
SYNCOM 1 orbits at an average altitude of 31,778 km in Medium Earth Orbit, the region between LEO and GEO (2,000–35,786 km). MEO’s higher altitude gives each satellite a much larger ground footprint than LEO, meaning fewer spacecraft are needed for global coverage — but signal latency is higher and radiation from the Van Allen belts is a significant design constraint. With an inclination of 26.4°, SYNCOM 1 passes over latitudes between 26.4°N and 26.4°S, covering the tropical and temperate zones where most of the world’s population resides. Low-to-mid inclination orbits are efficient to reach from equatorial and mid-latitude launch sites. United States operates approximately 13,279 active satellites in total.
❓ Frequently Asked Questions
SYNCOM 1 orbits in Medium Earth Orbit (MEO) at altitudes between 28,692 km (perigee) and 34,863 km (apogee), with an average altitude of approximately 31,778 km. It completes one orbit every 20 hours 36 minutes, travelling at approximately 11,637 km/h (7,231 mph).
SYNCOM 1 is operated by GSFC (United States). It is catalogued by the U.S. Space Surveillance Network under NORAD ID 553. You can track SYNCOM 1 in real time on Orbital Radar’s live tracker or browse all operators in the operator directory.
SYNCOM 1 was launched on 1963-02-14 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 SYNCOM 1 (NORAD ID 553) 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.
SYNCOM 1 travels at approximately 11,637 km/h (7,231 mph) — roughly 3.23 km/s. It completes 1.16 orbits per day, meaning the crew or instruments aboard (if any) would experience approximately 2 sunrises and sunsets every 24 hours.