Sea LaunchZenit 3SLLaunch Platform Odyssey, Sea Launch
DemoSat
Launched
March 28, 1999
Summary
DemoSat launched on a Sea Launch Zenit 3SL from Launch Platform Odyssey, Sea Launch on March 28, 1999. It was Sea Launch's 1st launch, 1st this year and humanity's 4,303rd orbital launch attempt. It was the 1st Zenit 3SL flight. The payload was bound for Elliptical Orbit (Elliptical). DemoSat, one of 2 catalogued objects, reached a 727 × 36,127 km orbit inclined 1.3°. 2 objects from this launch are catalogued, one of them a payload.
- Watch
- No webcast on record.
- Vehicle
- Zenit 3SL · Sea Launch
- Booster
- No booster details on record.
- Mission
- Test Flight · Elliptical Orbit (Elliptical)
- Milestone
- 1st Zenit 3SL flightSea Launch's 1st launch1st this yearhumanity's 4,303rd orbital launch attempt14th orbital launch attempt this year
Flight preview
Orbit: as tracked
DemoSat · NORAD 25661 · 1999-014 · Space-Track · tracking 1 of 2 objects
Show the numbers for orbit elements
- Object
- SEA LAUNCH DEMO
- Object ID
- 1999-014A
- Epoch
- 1999-03-28 02:02:48 UTC
- Mean motion
- 2.22320949 rev/day
- Eccentricity
- 0.7137766
- Inclination
- 1.2532°
- Ascending node
- 52.7213°
- Arg. of perigee
- 181.6858°
- Mean anomaly
- 350.3459°
- Element set
- 999
- Rev at epoch
- 0
- B*
- 0
Perigee, apogee and period are Kepler figures from the catalogued mean elements, not a propagated state. Published orbit: Elliptical. Ascent drawn from padside's representative profile.
Catalogued objects
2 catalogued: 1 payload, 1 rocket stage; 2 still in orbit
- DemoSat · NORAD 25661 · in orbit
Blok DM-SL No. 1TL · in orbit
Data from J. McDowell, planet4589.org
About this launch
DemoSat was the dummy payload on the first Boeing Sea Launch mission. The Zenit-3SL booster rocket lifted off from the Odyssey floating platform on the equator at 154 degrees W longitude.
Pad
Launch Platform Odyssey, Sea Launch
1st launch from Launch Platform Odyssey, 1st this year · 2nd from Sea Launch
36 launches from this pad · 40 from Sea Launch
under an hour after the previous launch from this pad
Questions
When did DemoSat launch?
DemoSat launched on March 28, 1999. The time is known to the hour, not the minute.
Where can I watch DemoSat?
No webcast is on record for this launch.
What rocket launched DemoSat?
Zenit 3SL, flown by Sea Launch. Zenit 3SL spec sheet
Where did DemoSat launch from?
Launch Platform Odyssey, Sea Launch.
What orbit did DemoSat reach?
DemoSat, one of 2 catalogued objects, reached a 727 × 36,127 km orbit inclined 1.3°.
How many satellites did DemoSat launch?
1 payload from this launch is catalogued, still in orbit (Data from J. McDowell, planet4589.org).