United States Air ForceDelta II 7925-9.5Space Launch Complex 17B, Cape Canaveral SFS, FL, USA
Skynet 4D
Launched
January 10, 1998
Image: USAF
Summary
Skynet 4D launched on an United States Air Force Delta II 7925-9.5 from Space Launch Complex 17B, Cape Canaveral SFS, FL, USA on January 10, 1998. It was United States Air Force's 988th launch, 1st this year and humanity's 4,209th orbital launch attempt. It was the 1st Delta II 7925-9.5 flight. The payload was bound for Geostationary Orbit (Direct-GEO). Skynet 4D, one of 6 catalogued objects, reached a 1,011 × 36,061 km orbit inclined 23.6°. 6 objects from this launch are catalogued, one of them a payload.
- Watch
- No webcast on record.
- Vehicle
- Delta II 7925-9.5 · United States Air Force
- Booster
- No booster details on record.
- Mission
- Communications · Geostationary Orbit (Direct-GEO)
- Milestone
- 1st Delta II 7925-9.5 flightUnited States Air Force's 988th launch1st this yearhumanity's 4,209th orbital launch attempt2nd orbital launch attempt this year
Flight preview
Orbit: as tracked
Skynet 4D · NORAD 25134 · 1998-002 · Space-Track · tracking 1 of 6 objects
Show the numbers for orbit elements
- Object
- SKYNET 4D
- Object ID
- 1998-002A
- Epoch
- 1998-01-10 01:43:27 UTC
- Mean motion
- 2.20862229 rev/day
- Eccentricity
- 0.7036189
- Inclination
- 23.6247°
- Ascending node
- 292.2574°
- Arg. of perigee
- 358.0022°
- Mean anomaly
- 358.4841°
- Element set
- 999
- Rev at epoch
- 1
- B*
- 0
Perigee, apogee and period are Kepler figures from the catalogued mean elements, not a propagated state. Published orbit: Direct-GEO. Ascent drawn from padside's representative profile.
Catalogued objects
6 catalogued: 1 payload, 2 rocket stages, 3 components; 3 still in orbit
- Skynet 4D · NORAD 25134
Delta 252 · in orbit
Delta 252 Stage 3 · in orbit
Data from J. McDowell, planet4589.org
About this launch
Skynet 4 was the third generation of UK Ministry of Defense communications satellites. They provided jam-proof communications service between fixed and mobile land and sea-based ground stations.
Pad
Space Launch Complex 17B, Cape Canaveral SFS, FL, USA
106th launch from Space Launch Complex 17B, 1st this year · 541st from Cape Canaveral SFS, FL, USA
132 launches from this pad · 1,131 from Cape Canaveral SFS, FL, USA
401 days after the previous launch from this pad
Questions
When did Skynet 4D launch?
Skynet 4D launched on January 10, 1998. The time is known to the hour, not the minute.
Where can I watch Skynet 4D?
No webcast is on record for this launch.
What rocket launched Skynet 4D?
Delta II 7925-9.5, flown by United States Air Force. Delta II 7925-9.5 spec sheet
Where did Skynet 4D launch from?
Space Launch Complex 17B, Cape Canaveral SFS, FL, USA.
What orbit did Skynet 4D reach?
Skynet 4D, one of 6 catalogued objects, reached a 1,011 × 36,061 km orbit inclined 23.6°.
How many satellites did Skynet 4D launch?
1 payload from this launch is catalogued (Data from J. McDowell, planet4589.org).