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SEA LAUNCH DEMO

NORAD 25661 Payload MEO 1999-014A ● Active
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🛰️ Orbital Parameters
Perigee
635 km
Apogee
36066 km
Inclination
1.7°
Period
645.0 min
Mean Motion
2.23255142 rev/day
TLE Epoch
2026-03-17 13:00:00 UTC
📐 Computed Orbital Characteristics
Avg. Altitude18,351 km
Orbital Velocity14,456 km/h
Velocity4.02 km/s
Orbital Period10 hours 45 minutes
Orbits / Day2.23
Eccentricity0.7166
Semi-Major Axis24,722 km
Est. Orbital LifetimeEffectively permanent — above atmospheric drag
🚀 Launch & Identity
Country / Operator
Sea Launch
Launch Date
1999-03-28
Launch Site
Sea Launch (ocean platform)
Int'l Designator
1999-014A
Object Type
Payload
RCS Size
Large (>1 m²)
🔗 Constellation / Groups
geo protected plus
📖 About This Object
SEA LAUNCH DEMO is an active satellite operated by Sea Launch, launched on 1999-03-28 from Sea Launch (ocean platform). With over 27 years in orbit, it has far exceeded many satellites’ design lifetimes. It orbits in Medium Earth Orbit (MEO) at altitudes between 635 km and 36,066 km with an inclination of 1.7°. It travels at approximately 14,456 km/h (4.02 km/s), completing one full orbit every 10 hours 45 minutes — that’s roughly 2.23 orbits per day. Its orbital eccentricity of 0.7166 gives it a noticeably elliptical path, with significant altitude variation between perigee and apogee. It is part of the Geo Protected Plus constellation group. Orbital Radar tracks SEA LAUNCH DEMO in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.
🌍 Orbit Context
SEA LAUNCH DEMO operates in Medium Earth Orbit (MEO), the region between LEO and GEO spanning roughly 2,000 to 35,786 km altitude. MEO is home to navigation constellations (GPS at ~20,200 km, Galileo at ~23,222 km, GLONASS at ~19,130 km) and some communications systems. The higher altitude gives each satellite a much larger ground footprint than LEO, meaning fewer satellites are needed for global coverage, but signal latency is higher and radiation exposure — particularly from the Van Allen belts — is a significant design challenge.
❓ Frequently Asked Questions
SEA LAUNCH DEMO orbits in Medium Earth Orbit (MEO) at altitudes between 635 km (perigee) and 36,066 km (apogee), with an average altitude of approximately 18,351 km. It completes one orbit every 10 hours 45 minutes, travelling at approximately 14,456 km/h (8,982 mph).
SEA LAUNCH DEMO is operated by Sea Launch. It is catalogued by the U.S. Space Surveillance Network under NORAD ID 25661. You can track SEA LAUNCH DEMO in real time on Orbital Radar’s live tracker.
SEA LAUNCH DEMO was launched on 1999-03-28 from Sea Launch (ocean platform). At its current altitude, the estimated remaining orbital lifetime is: effectively permanent — above atmospheric drag.
Yes — Orbital Radar tracks SEA LAUNCH DEMO (NORAD ID 25661) 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.
SEA LAUNCH DEMO travels at approximately 14,456 km/h (8,982 mph) — roughly 4.02 km/s. It completes 2.23 orbits per day, meaning the crew or instruments aboard (if any) would experience approximately 4 sunrises and sunsets every 24 hours.
SEA LAUNCH DEMO is a member of the Geo Protected Plus constellation. Satellites in this group work together to provide coordinated coverage, typically in similar orbital planes at comparable altitudes. You can view all Geo Protected Plus satellites on Orbital Radar’s live tracker.