United States Air ForceDelta II 6920-10Space Launch Complex 17A, Cape Canaveral SFS, FL, USA
ROSAT
Launched
June 1, 1990
Image: NASA/MSFC
Summary
ROSAT launched on an United States Air Force Delta II 6920-10 from Space Launch Complex 17A, Cape Canaveral SFS, FL, USA on June 1, 1990. It was United States Air Force's 883rd launch, 7th this year and humanity's 3,527th orbital launch attempt. It was the 1st Delta II 6920-10 flight. The payload was bound for low Earth orbit (LEO). ROSAT, one of 2 catalogued objects, reached a 572 × 591 km orbit inclined 53.0°. 2 objects from this launch are catalogued, one of them a payload.
- Watch
- No webcast on record.
- Vehicle
- Delta II 6920-10 · United States Air Force
- Booster
- No booster details on record.
- Mission
- Astrophysics · Low Earth Orbit (LEO)
- Milestone
- 1st Delta II 6920-10 flightUnited States Air Force's 883rd launch7th this yearhumanity's 3,527th orbital launch attempt51st orbital launch attempt this year
Flight preview
Orbit: as tracked
ROSAT · NORAD 20638 · 1990-049 · Space-Track · tracking 1 of 2 objects
Show the numbers for orbit elements
- Object
- ROSAT
- Object ID
- 1990-049A
- Epoch
- 1990-06-02 04:06:53 UTC
- Mean motion
- 14.97555526 rev/day
- Eccentricity
- 0.0014023
- Inclination
- 52.9879°
- Ascending node
- 116.8867°
- Arg. of perigee
- 298.728°
- Mean anomaly
- 61.2278°
- Element set
- 999
- Rev at epoch
- 3
- B*
- 0.0055559
Perigee, apogee and period are Kepler figures from the catalogued mean elements, not a propagated state. Published orbit: LEO. Ascent drawn from padside's representative profile.
Catalogued objects
2 catalogued: 1 payload, 1 rocket stage; none still in orbit
- ROSAT · NORAD 20638 · re-entered October 23, 2011
Delta 195 · re-entered January 15, 1992
Data from J. McDowell, planet4589.org
About this launch
X-ray observatory developed by German, the United States and the United Kingdom
Pad

Space Launch Complex 17A, Cape Canaveral SFS, FL, USA
92nd launch from Space Launch Complex 17A, 3rd this year · 432nd from Cape Canaveral SFS, FL, USA
145 launches from this pad · 1,131 from Cape Canaveral SFS, FL, USA
67 days after the previous launch from this pad
Questions
When did ROSAT launch?
ROSAT launched on June 1, 1990. The time is known to the hour, not the minute.
Where can I watch ROSAT?
No webcast is on record for this launch.
What rocket launched ROSAT?
Delta II 6920-10, flown by United States Air Force. Delta II 6920-10 spec sheet
Where did ROSAT launch from?
Space Launch Complex 17A, Cape Canaveral SFS, FL, USA.
What orbit did ROSAT reach?
ROSAT, one of 2 catalogued objects, reached a 572 × 591 km orbit inclined 53.0°.
How many satellites did ROSAT launch?
1 payload from this launch is catalogued, no longer in orbit (Data from J. McDowell, planet4589.org).
