Orba or X-2 was a uninstrumented, plain, spherical, gold plated satellite to measure the density of the upper atmosphere by observing orbital decay of the satellite.
Orba was lost in a launch failure of the maiden Black Arrow orbital launch attempt.
|Type / Application:||Technology|
|Orbit:||350 km × 1000 km, 82° (planned)|
|Orba (X 2)||02.09.1970||Wo LA-5B||F||Black Arrow||with R-2 Instrument Package|