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Spacecraft information: GP-B
Launch Details
| Launched | 19 April 2004 |
| Flight ended | – |
| Status | Non-operational |
| Launch site | Air Force Western Test Range, California, USA |
| Owner | United States |
| NORAD ID | 28230 |
| COSPAR ID | 2004-014A |
| Alternative names |
GRAVITY PROBE B |
| Observing |
Current orbital elements
| Inclination | 89.845° |
| Eccentricity | 0.00020 |
| RA ascending node | 3.588 hr |
| Argument perigee | 100.050° |
| Mean anomaly | 260.095° |
| Orbital period | 97.105 min |
| Epoch of osculation | 12 Dec 2025, 04:52 |
Derived Quantities
| Min Altitude | 625.8 km |
| Mean Altitude | 627.2 km |
| Peak Altitude | 628.6 km |
Launched alongside
DELTA 2 R/BOrbital History
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