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UoSAT-4
Spacecraft properties

Mission type	OSCAR
Operator	University of Surrey
COSPAR ID	1990-005C ^[1]
SATCAT no.	20438


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

Mission [ edit ]

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.

References [ edit ]

^ ^a ^b "Sat Cat" . Celestrak . Retrieved 27 June 2012 .
^ ^a ^b ^c "UoSat 3, 4, 5 (UO 14, 15, 22 / Oscar 14, 15, 22) / Healthsat 1" . Gunter's Space Page . Retrieved 27 June 2012 .
^ "Oscar 15 - Orbit" . Heavens-Above . 15 April 2019 . Retrieved 16 April 2019 .

v t e UoSAT satellites
UoSAT-1 UoSAT-2 UoSAT-3 UoSAT-4 UoSAT-5 UoSAT-12
See also: Surrey Satellite Technology Ltd. (SSTL)

v t e ← 1989 Orbital launches in 1990 1991 →
January	Skynet 4A , JCSAT-2 STS-32 ( Leasat 5 ) Kosmos 2055 Kosmos 2056 SPOT-2 , UoSAT-3 , UoSAT-4 , Pacsat , DOVE , Webersat , LUSat Molniya-3 No.53L Hiten , Hagoromo USA-50 ) Kosmos 2057 Kosmos 2058
February	Zhongxing 3 Kosmos 2059 Momo 1b , Orizuru , Fuju 1b Soyuz TM-9 USA-51 , USA-52 Gran' No.35L Superbird B , BS 2x Nadezhda No.405 Okean-O1 No.5 STS-36 ( USA-53 ) Progress M-3
March	Intelsat 603 Kosmos 2060 Kosmos 2061 Kosmos 2062 USA-54 Kosmos 2063
April	Ofek-2 Unnamed Pegsat , USA-55 Kosmos 2064 , Kosmos 2065 , Kosmos 2066 , Kosmos 2067 , Kosmos 2068 , Kosmos 2069 , Kosmos 2070 , Kosmos 2071 AsiaSat 1 USA-56 , USA-57 , USA-58 Foton No.6L Kosmos 2072 Palapa B2R Kosmos 2073 Kosmos 2074 STS-31 ( Hubble ) Kosmos 2075 Molniya-1 No.71 Kosmos 2076
May	Progress 42 Kosmos 2077 MacSat 1 , MacSat 2 Kosmos 2078 Kosmos 2079 , Kosmos 2080 , Kosmos 2081 Kosmos 2082 Resurs-F1 No.50 Kristall
June	ROSAT USA-59 , USA-60 , USA-61 , USA-62 INSAT-1D Molniya 3 No.47L Kosmos 2083 Gorizont No.30L Kosmos 2084 Intelsat 604 Meteor-2 No.23
July	Unnamed Gamma Badr-1 , Optus-MFS Resurs-F2 No.5 Kosmos 2085 Kosmos 2086 TDF 2 , DFS Kopernikus 2 Kosmos 2087 CRRES Kosmos 2088
August	Soyuz TM-10 USA-63 Kosmos 2089 Kosmos 2090 , Kosmos 2091 , Kosmos 2092 , Kosmos 2093 , Kosmos 2094 , Kosmos 2095 Ekran-M No.14L Molniya-1T No.68 Progress M-4 Resurs-F1 No.49 Marco Polo 2 Kosmos 2096 Kosmos 2097 Yuri 3a Kosmos 2098 Skynet 4C , Eutelsat II F-1 Kosmos 2099
September	Fengyun I-02 , Qiqiuweixing 1 , Qiqiuweixing 2 Resurs-F1 No.51 Kosmos 2100 Molniya-3 No.54L Progress M-5 Meteor-2 No.25
October	Kosmos 2101 USA-64 Unnamed FSW-1 No.3 STS-41 ( Ulysses ) SBS 6 , Westar 6S Kosmos 2102 Inmarsat-2F1
November	Gorizont No.32L USA-65 Kosmos 2103 STS-38 ( USA-67 , Prowler ) Kosmos 2104 Kosmos 2105 Satcom C1 , GStar 4 Molniya 1T No.70 Gorizont No.33L USA-66 Kosmos 2106
December	USA-68 STS-35 Soyuz TM-11 Kosmos 2107 Kosmos 2108 Kosmos 2109 , Kosmos 2110 , Kosmos 2111 Kosmos 2112 Gran' No.37L Kosmos 2113 Kosmos 2114 , Kosmos 2115 , Kosmos 2116 , Kosmos 2117 , Kosmos 2118 , Kosmos 2119 Kosmos 2120 Globus No.12
Launches are separated by dots ( ? ), payloads by commas ( , ), multiple names for the same satellite by slashes ( / ). Crewed flights are underlined. Launch failures are marked with the † sign. Payloads deployed from other spacecraft are (enclosed in parentheses).

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