Martin MariettaCommercial Titan IIISpace Launch Complex 40, Cape Canaveral SFS, FL, USA
Skynet 4A & JCSat 2
Launched
January 1, 1990
Image: NASA
Summary
Skynet 4A & JCSat 2 launched on a Martin Marietta Commercial Titan III from Space Launch Complex 40, Cape Canaveral SFS, FL, USA on January 1, 1990. It was Martin Marietta's 1st launch, 1st this year and humanity's 3,477th orbital launch attempt. It was the 1st Commercial Titan III flight. The payload was bound for Geostationary Orbit (Direct-GEO). The tracked orbit of Skynet 4A, one of 6 catalogued objects, from January 4, 1990, was 33,684 × 35,707 km inclined 3.4°. 6 objects from this launch are catalogued, 2 of them payloads.
- Watch
- No webcast on record.
- Vehicle
- Commercial Titan III · Martin Marietta
- Booster
- No booster details on record.
- Mission
- Communications · Geostationary Orbit (Direct-GEO)
- Milestone
- 1st Commercial Titan III flightMartin Marietta's 1st launch1st this yearhumanity's 3,477th orbital launch attempt1st orbital launch attempt this year
Flight preview
Orbit: as tracked
Skynet 4A · NORAD 20401 · 1990-001 · Space-Track · tracking 1 of 6 objects
Show the numbers for orbit elements
- Object
- SKYNET 4A
- Object ID
- 1990-001A
- Epoch
- 1990-01-04 01:11:14 UTC
- Mean motion
- 1.043226 rev/day
- Eccentricity
- 0.0246302
- Inclination
- 3.4201°
- Ascending node
- 303.9129°
- Arg. of perigee
- 53.7468°
- Mean anomaly
- 308.68°
- 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.
Catalogued objects
6 catalogued: 2 payloads, 1 rocket stage, 3 components; 2 still in orbit
- Skynet 4A · NORAD 20401
- JCSAT 2 · NORAD 20402 · in orbit
Titan CT-1 Stage 2 · re-entered January 9, 1990
Data from J. McDowell, planet4589.org
About this launch
British and Japanese geostatioary communications satellites
Pad

Space Launch Complex 40, Cape Canaveral SFS, FL, USA
35th launch from Space Launch Complex 40, 1st this year · 426th from Cape Canaveral SFS, FL, USA
403 launches from this pad · 1,131 from Cape Canaveral SFS, FL, USA
118 days after the previous launch from this pad
Questions
When did Skynet 4A & JCSat 2 launch?
Skynet 4A & JCSat 2 launched on January 1, 1990. The time is known to the hour, not the minute.
Where can I watch Skynet 4A & JCSat 2?
No webcast is on record for this launch.
What rocket launched Skynet 4A & JCSat 2?
Commercial Titan III, flown by Martin Marietta. Commercial Titan III spec sheet
Where did Skynet 4A & JCSat 2 launch from?
Space Launch Complex 40, Cape Canaveral SFS, FL, USA.
What orbit did Skynet 4A & JCSat 2 reach?
The tracked orbit of Skynet 4A, one of 6 catalogued objects, from January 4, 1990, was 33,684 × 35,707 km inclined 3.4°.
How many satellites did Skynet 4A & JCSat 2 launch?
2 payloads from this launch are catalogued, 1 of them still in orbit (Data from J. McDowell, planet4589.org).
