Delta II 7920 launched Stanford and NASA's Gravity Probe B from Vandenberg AFB into a 400-mile polar orbit to test two predictions of Einstein's general relativity via ultra-precise gyroscopes.
- Outcome
- Success
- Orbit
- LEO
- Low Earth orbit
- Payload to orbit
- 3.1 T
- Flight
- 13th
- of 17 Delta II 7920-10C flights
- Date and time
- 20 April 2004, 16:57 UTC
- Rocket
- Delta II 7920-10C
- Builder
- ULA
- Launch site
- Space Launch Complex 2W, Vandenberg SFB, CA, USA
- Payload
- Astrophysics
- International designator
- 2004-014
- Launches in 2004
- 14th of 54
See it in orbit
Space Atlas shows the satellites and rocket stages from this launch in 3D.
Object pages on Space Atlas: Gravity Probe B
View satellites in Space Atlas