|Manufacturer||Radio Amateur Satellite Corporation (AMSAT)|
|Launch mass||1.3 kilograms (2.9 lb)|
|Dimensions||10 by 10 by 10 centimetres (3.9 in × 3.9 in × 3.9 in)|
|Start of mission|
|Launch date||8 October 2015, 12:49 UTC|
|Rocket||Atlas V 401 AV-058|
|Launch site||Vandenberg SLC-3E|
|Semi-major axis||7,020 kilometres (4,360 mi)|
|Perigee altitude||504.3 kilometres (313.4 mi)|
|Apogee altitude||795.7 kilometres (494.4 mi)|
|Argument of perigee||312.3881°|
|Epoch||25 June 2018|
|Frequency||Uplink: 435.172 MHz|
Downlink: 145.980 MHz
Fox-1A, AO-85 or AMSAT OSCAR 85 is an American amateur radio satellite. It is a 1U Cubesat, was built by the AMSAT-NA and carries a single-channel transponder for FM radio. The satellite has one rod antenna each for the 70 centimetres (28 in) and 2 metres (6 ft 7 in) bands. To enable a satellite launch under NASA's Educational Launch of Nanosatellites (ELaNa) program, the satellite continues to carry a Penn State University student experiment (MEMS gyroscope).
According to AMSAT-NA, Fox-1A will replace OSCAR 51. Upon successful launch, the satellite was assigned OSCAR number 85.
The satellite was launched on 8 October 2015 with an Atlas V rocket together with the main payload Intruder 11A (also known as NOSS-3 7A, USA 264 and NROL 55) and 12 other Cubesat satellites (SNaP-3 ALICE, SNaP-3 EDDIE, SNaP-3 JIMI, LMRSTSat, SINOD-D 1, SINOD-D 3, AeroCube 5C, OCSD A, ARC 1, BisonSat, PropCube 1 and PropCube 3) from Vandenberg Air Force Base, California, United States. After just a few hours, the transponder was put into operation, initial connections were made between amateur radio stations and telemetry was received.
Since December 2018, AO-85 has suffered from dangerously low battery voltage while in eclipse. As a result, AMSAT have disabled all on board transmitters in an effort to extend the usable life of the satellite. Transmitters are periodically turned back on to collect telemetry data.