|Mission type||Amateur Radio Satellite|
|Launch mass||27.2 kilograms (60 lb)|
|Dimensions||38 cm × 38 cm × 33 cm (15 in × 15 in × 13 in)|
|Start of mission|
|Launch date||5 March 1978, 17:54 UTC|
|Launch site||Vandenberg SLC-2W|
|End of mission|
|Last contact||24 June 1983|
|Semi-major axis||7,274.0 km (4,519.9 mi)|
|Perigee altitude||899.1 km (558.7 mi)|
|Apogee altitude||907.8 km (564.1 mi)|
|Epoch||6 February 2020|
OSCAR 8 (also called AO-08, Phase 2D or Amsat P2D) is an American amateur radio satellite. It was developed and built by radio amateurs of the AMSAT and launched on March 5, 1978 as a secondary payload together with the earth observation satellite Landsat 3 from Vandenberg Air Force Base, California, United States.
The satellite had two linear transponders, from the 2-meter band (uplink) to the 10-meter band and the 70-centimeter band (downlink).