NEXT SPACEFLIGHT

Juno II

Juno II was an American space launch vehicle used during the late 1950s and early 1960s. It was derived from the Jupiter missile, which was used as the first stage.

Solid rocket motors derived from the MGM-29 Sergeant were used as upper stages—eleven for the second stage, three for the third stage, and one for the fourth stage—the same configuration as used for the upper stages of the smaller Juno I rocket. On some launches to low Earth orbit, the fourth stage was not flown. Development of the Juno II was extremely fast due to being completely built from existing hardware.

The main differences between the Juno II and Jupiter were stretched propellant tanks for increased burn time (the first stage burn time was approximately 20 seconds longer than on the Jupiter), a reinforced structure to support the added weight of upper stages, and the inertial guidance system replaced with a radio ground guidance package, which which was moved to the upper stages.

Missions: 10
Successes: 4
Partial Failures: 1
Failures: 5
Success Streak: 0
Success Rate: 45.0%
Wiki

Configurations

Juno II
ABMA
Status: Retired
Liftoff Thrust: 667 kN
Payload to LEO: 41 kg
Stages: 4
Strap-ons: 0
Rocket Height: 24.0 m

Launch Sites

LC-26B, Cape Canaveral SFS, Florida, USA
LC-5, Cape Canaveral SFS, Florida, USA

Launches

ABMA
Juno II | Explorer 12a
Wed May 24, 1961 19:48 UTC
LC-26B, Cape Canaveral SFS, Florida, USA
ABMA
Juno II | Explorer 11 (S 15)
Thu Apr 27, 1961 14:16 UTC
LC-26B, Cape Canaveral SFS, Florida, USA
ABMA
Juno II | Explorer 10a
Sat Feb 25, 1961 00:13 UTC
LC-26B, Cape Canaveral SFS, Florida, USA
ABMA
Juno II | Explorer 8
Thu Nov 03, 1960 05:23 UTC
LC-26B, Cape Canaveral SFS, Florida, USA
ABMA
Juno II | Explorer 8a
Wed Mar 23, 1960 13:35 UTC
LC-26B, Cape Canaveral SFS, Florida, USA
ABMA
Juno II | Explorer 7
Tue Oct 13, 1959 15:30 UTC
LC-5, Cape Canaveral SFS, Florida, USA
ABMA
Juno II | Beacon 2
Sat Aug 15, 1959 00:31 UTC
LC-26B, Cape Canaveral SFS, Florida, USA
ABMA
Juno II | Explorer 6a
Thu Jul 16, 1959 17:37 UTC
LC-5, Cape Canaveral SFS, Florida, USA
ABMA
Juno II | Pioneer 4
Tue Mar 03, 1959 05:10 UTC
LC-5, Cape Canaveral SFS, Florida, USA
ABMA
Juno II | Pioneer 3
Sat Dec 06, 1958 05:44 UTC
LC-5, Cape Canaveral SFS, Florida, USA