Vela 4A - Misplaced Pages

(Redirected from OPS 6638) American reconnaissance satellite

Vela 4A
Spacecraft properties


Operator	USAF
COSPAR ID	1967-040A
SATCAT no.	2765


Manufacturer	TRW
Launch mass	225 kilograms (496 lb)
Power	120 W


Start of mission
Launch date	April 28, 1967, 10:01 (1967-04-28UTC10:01Z) UTC
Rocket	Titan III-C
Launch site	Cape Canaveral LC-41


Orbital parameters
Reference system	Geocentric
Regime	Highly Elliptical
Semi-major axis	117,619 kilometres (73,085 mi)
Perigee altitude	53,631.5 kilometres (33,325.1 mi)
Apogee altitude	161,866.1 kilometres (100,578.9 mi)
Inclination	19.9°
Period	6,690.8 minutes (111.513 h)

Vela← Vela 3B Vela 4B →

Vela 4A (also known Vela 7 and OPS 6638) was an American reconnaissance satellite to detect explosions and nuclear tests on land and in space. It was released together with Vela 4B, ERS 18, OV5 1 and OV5 3.

The ship remains in orbit around Earth.

Instruments

2 optical bhangmeters observing Earth
12 external X-ray detectors
18 internal neutron and gamma-ray detectors

References

NASA Goddard Space Flight Center. "Vela 4A". Retrieved 28 September 2019. This article incorporates text from this source, which is in the public domain.
Ford, Dominic. "OPS 63". In-The-Sky.org. Retrieved 28 September 2019.
Antonín Vítek. "1967-040A - Vela 7". Space 40. Retrieved 28 September 2019.
Krebs, Gunter. "Vela 7, 8, 9, 10, 11, 12 (advanced Vela)". Gunter's Space Page. Retrieved 28 September 2019.

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v t e ← 1966 Orbital launches in 1967 1968 →
Intelsat II F-2 OPS 1664 IDCSP 9 IDCSP 10 IDCSP 11 IDCSP 12 IDCSP 13 IDCSP 14 IDCSP 15 IDCSP 16 Kosmos 138 Kosmos 139 ESSA-4 OV3-5 OPS 4399 Lunar Orbiter 3 Kosmos 140 OPS 6073 Diadème 1 Kosmos 141 Kosmos 142 Diadème 2 OPS 4750 OPS 4204 Kosmos 143 Kosmos 144 Kosmos 145 OSO 3 Kosmos 146 Kosmos 147 Kosmos 148 Kosmos 149 Kosmos 150 OGCh No.8 Intelsat II F-3 Kosmos 151 Kosmos 152 OPS 4779 Kosmos 153 ATS-2 RPM-481 Kosmos 154 Kosmos 155 Unnamed OPS 0100 Surveyor 3 ESSA-5 Soyuz 1 San Marco 2 OPS 4243 Kosmos 156 OPS 6638 OPS 6679 ERS-18 ERS-20 ERS-27 Lunar Orbiter 4 Ariel 3 OPS 4696 OPS 1967 Kosmos 157 Kosmos 158 Kosmos 159 Kosmos 160 OPS 7218 Kosmos 161 OPS 4321 OPS 5557 Explorer 34 Molniya-1 No.8 ESRO-2A NRL PL-151 NRL PL-152 NRL PL-153 NRL PL-154 NRL-PL 159 Timation 1 Calsphere 3 Calsphere 4 OPS 5712 Kosmos 162 OPS 4360 Kosmos 163 Kosmos 164 Venera 4 Kosmos 165 Mariner 5 Kosmos 166 OPS 3559 OPS 1873 Kosmos 167 Zenit-4 No.32 OPS 4286 Unnamed SECOR-9 Aurora IDCSP 16 IDCSP 17 IDCSP 18 IDCSP 19 LES-5 DODGE Kosmos 168 Surveyor 4 Kosmos 169 Explorer 35 Zenit-4 No.33 OPS 1879 OV1-11 OV1-12 OV1-86 OGO-4 Kosmos 170 Lunar Orbiter 5 OPS 4827 Kosmos 171 Kosmos 172 OPS 4886 OPS 7202 Kosmos 173 Kosmos 174 Zenit-2 No.51 Biosatellite 2 Surveyor 5 Kosmos 175 Kosmos 176 OPS 5089 Kosmos 177 Kosmos 178 OPS 4941 Kosmos 179 OPS 4947 Kosmos 180 Unnamed 7K-L1 No.4L Intelsat II F-4 Molniya-1 No.9 OPS 1264 Kosmos 181 Kosmos 182 Kosmos 183 OSO 4 Molniya-1 No.12 Kosmos 184 OPS 4995 Kosmos 185 Kosmos 186 Kosmos 187 Kosmos 188 Kosmos 189 OPS 0562 OPS 1587 Kosmos 190 ATS-3 Surveyor 6 Apollo 4 ESSA-6 Kosmos 191 7K-L1 No.5L Kosmos 192 Kosmos 193 WRESAT Kosmos 194 OV3-6 OPS 5000 OPS 1001 Pioneer 8 ERS-30 Kosmos 195 Kosmos 196 Kosmos 197 Kosmos 198
Payloads are separated by bullets ( · ), launches by pipes ( \| ). Crewed flights are indicated in underline. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in (brackets).

← 1966 Orbital launches in 1967 1968 →

Payloads are separated by bullets ( · ), launches by pipes ( | ). Crewed flights are indicated in underline. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in (brackets).

Categories:

Instruments

See also

References