NEXT SPACEFLIGHT

Status

Failure

KH-5 4 (Discoverer 27)

Launch Time
Fri Jul 21, 1961 22:35 UTC

Open circuit in guidance computer led to loss of control and vehicle breakup at T+60 seconds.

Rocket

Thor DM-21 Agena-B
US Air Force
Status: Retired
Stages: 3
Strap-ons: 0

Mission Details

KH-5 4 (Discoverer 27)

The KH-5, also known as Keyhole 5 or codenamed Argon, served as the area survey component within the Corona program. Equipped with the Argon camera, also referred to as Corona-A, this single-frame camera was integrated with standard Corona hardware, including the return vehicle (SRV). Operating with a ground resolution of approximately 140 meters, the KH-5 relied on the Agena-B stage for three-axis control and propulsion throughout its mission. Upon completion, the SRV was deorbited using its own small solid rocket motor.

Location

SLC-1W (75-3-4), Vandenberg SFB, California, USA

Stats

1961

25th orbital launch attempt

Thor-Agena

27th mission
8th mission of 1961
11th failed mission