UoSAT-4

UoSAT-4, also known as UO-15 and OSCAR-15, is a British satellite in Low Earth Orbit. It was built by a spin-off company of the University of Surrey, Surrey Satellite Technology (SSTL) and launched in January 1990 from French Guiana.^[1]

UoSAT-4

Mission type	OSCAR
Operator	University of Surrey
COSPAR ID	1990-005C[1]
SATCAT no.	20438
Spacecraft properties
Manufacturer	SSTL
Start of mission
Launch date	22 January 1990, 01:35:27 (1990-01-22UTC01:35:27Z) UTC
Rocket	Ariane 40[2]
Launch site	Kourou ELA-2
Orbital parameters
Reference system	Geocentric
Regime	Sun-synchronous
Perigee altitude	780 km (480 mi)
Apogee altitude	796 km (495 mi)
Inclination	98.8074 degrees
Period	100.6 minutes
Epoch	15 April 2019, 20:59 [3]
OSCAR ← OSCAR 14 OSCAR 16 →

UoSAT-4 was launched on the same rocket as its sister satellite, UoSAT-3.^[2]

Mission

UoSAT-4 carried equipment to supplement UoSAT-3, but failed after two days in orbit.^[2]

The satellite forms part of the growing amounts of orbital debris orbiting around the Earth. The payload will decay in the Earth's atmosphere some time in the future.