Vela 4B

Vela 4B (also known Vela 8 and OPS 6679^[3]) was an American reconnaissance satellite to detect explosions and nuclear tests on land and in space. It was released together with Vela 4A, ERS 18, OV5 1 and OV5 3.^[4]

Vela 4B

Operator	USAF
COSPAR ID	1967-040B[1]
SATCAT no.	2766[2]
Spacecraft properties
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 3C-10
Launch site	Cape Canaveral LC-41
Orbital parameters
Reference system	Geocentric
Regime	Highly Elliptical
Perigee altitude	107,337 kilometres (66,696 mi)
Apogee altitude	114,612 kilometres (71,217 mi)
Inclination	33.06°
Period	6,671.8 minutes (111.197 h)
Epoch	1 May 1967
Vela ← Vela 4A Vela 5A →

Instruments

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

See also

• Vela (satellite)