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Juno II
Part of Jupiter Family
Juno II
Juno II
Credit: © Thomas Kladiva - Thomas Kladiva
American orbital launch vehicle. Satellite launcher derived from Jupiter IRBM. Basic 4 stage vehicle consisted of 1 x Jupiter + 1 x Cluster stage 2 + 1 x Cluster stage 3 + 1 x RTV Motor

Status: Retired 1961. First Launch: 1958-12-06. Last Launch: 1961-05-24. Number: 10 . Payload: 41 kg (90 lb). Thrust: 667.20 kN (149,993 lbf). Gross mass: 55,110 kg (121,490 lb). Height: 24.00 m (78.00 ft). Diameter: 2.67 m (8.75 ft). Apogee: 200 km (120 mi).

LEO Payload: 41 kg (90 lb) to a 200 km orbit. Payload: 6.00 kg (13.20 lb) to a translunar trajectory. Development Cost $: 84.500 million. Launch Price $: 10.830 million in 1960 dollars. Flyaway Unit Cost 1985$: 0.735 million in 1958 dollars. Total Development Built: 30. Total Production Built: 68.


More at: Juno II.

Family: orbital launch vehicle. People: von Braun. Country: USA. Engines: S-3. Spacecraft: Beacon 1, Pioneer 3-4, S-1, S-46, S-30, P-14, S-15. Projects: Explorer, Pioneer series. Launch Sites: Cape Canaveral, Cape Canaveral LC5, Cape Canaveral LC26B. Stages: Jupiter (stage), Castor engine.
Photo Gallery

Juno IJuno I
Credit: © Thomas Kladiva - Thomas Kladiva


Jupiter missileJupiter missile
Credit: © Mark Wade


Juno 2Juno 2
Credit: © Mark Wade


Juno 2 Juno 2
Juno 2 - COSPAR 1959-Iota



1958 December 6 - . 05:44 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC5. LV Family: Jupiter. Launch Vehicle: Juno II. FAILURE: First Stage shut down too early. Partial Failure.. Failed Stage: 1.
  • Pioneer 3 - . Mass: 6.00 kg (13.20 lb). Nation: USA. Agency: NASA. Program: Pioneer. Class: Moon. Type: Lunar probe. Spacecraft: Pioneer 3-4. Decay Date: 1958-12-07 . USAF Sat Cat: 111 . COSPAR: 1958-Theta-1.

    Failed to reach moon; provided radiation data. Pioneer III, the third U.S.-IGY intended lunar probe under the direction of NASA with the Army acting as executive agent, was launched from the Atlantic Missile Range by a Juno II rocket. The primary objective, to place the 12.95 pound scientific payload in the vicinity of the moon, failed. Pioneer III reached an altitude of approximately 70,000 miles and revealed that the earth's radiation belt comprised at least two distinct bands.


1959 March 3 - . 05:10 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC5. LV Family: Jupiter. Launch Vehicle: Juno II.
  • Pioneer 4 - . Mass: 6.00 kg (13.20 lb). Nation: USA. Agency: NASA. Program: Pioneer. Class: Moon. Type: Lunar probe. Spacecraft: Pioneer 3-4. USAF Sat Cat: 113 . COSPAR: 1959-Nu-1.

    The fourth U.S.-IGY lunar probe effort, Pioneer IV, a joint project of the Army Ballistic Missile Agency and Jet Propulsion Laboratory under the direction of NASA, was launched by a Juno II rocket from the Atlantic Missile Range. Intended to impact on the lunar surface, Pioneer IV achieved earth-moon trajectory, passing within 60,200 km of the moon before going into permanent orbit around the sun.


1959 June 6 - . LV Family: Jupiter. Launch Vehicle: Juno II.
  • Jupiter biological test results. - . Nation: USA. Army announced that sea urchin eggs fertilized before Jupiter nose cone flight continued to grow normally..

1959 July 8 - . LV Family: Jupiter. Launch Vehicle: Juno II.
  • Jupiter deleted as Mercury launch vehicle. - . Nation: USA. Program: Mercury. As developmental planning for Project Mercury evolved, NASA notified the Army that to reduce the variety of launching vehicles to Jupiter missile would not be used for Project Mercury tests..

1959 July 16 - . 17:37 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC5. LV Family: Jupiter. Launch Vehicle: Juno II. FAILURE: Control lost after 5.5 sec. Destroyed by range safety.. Failed Stage: 1.
  • Explorer S-1 - . Payload: S-1. Mass: 41 kg (90 lb). Nation: USA. Agency: NASA. Program: Explorer. Class: Earth. Type: Magnetosphere satellite. Spacecraft: S-1. Decay Date: 1959-07-16 .

1959 August 15 - . 00:31 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC26B. LV Family: Jupiter. Launch Vehicle: Juno II. FAILURE: First stage shut down too early; no attitude control for upper stages.. Failed Stage: 1.
  • Beacon 2 - . Mass: 5.00 kg (11.00 lb). Nation: USA. Agency: USN. Class: Technology. Type: Navigation technology satellite. Spacecraft: Beacon 1. Decay Date: 1959-08-14 .

1959 October 13 - . 15:30 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC5. LV Family: Jupiter. Launch Vehicle: Juno II.
  • Explorer 7 - . Payload: S-1A. Mass: 42 kg (92 lb). Nation: USA. Agency: NASA. Program: Explorer. Class: Earth. Type: Magnetosphere satellite. Spacecraft: S-1. USAF Sat Cat: 22 . COSPAR: 1959-Iota-1. Apogee: 857 km (532 mi). Perigee: 523 km (324 mi). Inclination: 50.3000 deg. Period: 98.60 min. Spacecraft engaged in research and exploration of the upper atmosphere or outer space. Returned magnetic field and solar flare data..

1960 March 23 - . 13:35 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC26B. LV Family: Jupiter. Launch Vehicle: Juno II. FAILURE: Upper stage failed to ignite. Third stage failed to ignite due to loss of radio contact.. Failed Stage: 3.
  • Explorer S-46 - . Payload: S-46. Mass: 16 kg (35 lb). Nation: USA. Agency: NASA. Program: Explorer. Class: Earth. Type: Magnetosphere satellite. Spacecraft: S-46. Decay Date: 1960-03-23 .

1960 November 3 - . 05:23 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC26B. LV Family: Jupiter. Launch Vehicle: Juno II.
  • Explorer 8 - . Payload: S-30. Mass: 41 kg (90 lb). Nation: USA. Agency: NASA. Program: Explorer. Class: Earth. Type: Ionosphere satellite. Spacecraft: S-30. Decay Date: 2012-03-28 . USAF Sat Cat: 60 . COSPAR: 1960-Xi-1. Apogee: 1,331 km (827 mi). Perigee: 394 km (244 mi). Inclination: 49.9000 deg. Period: 102.20 min. Ionospheric research. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B). .

1961 February 25 - . 00:13 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC26B. LV Family: Jupiter. Launch Vehicle: Juno II. FAILURE: Third Stage failed to ignite.. Failed Stage: 3.
  • Explorer - . Payload: S-45. Mass: 34 kg (74 lb). Nation: USA. Agency: NASA. Program: Explorer. Class: Astronomy. Type: Solar satellite. Spacecraft Bus: P. Spacecraft: P-14. Decay Date: 1961-02-24 .

1961 April 27 - . 14:16 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC26B. LV Family: Jupiter. Launch Vehicle: Juno II.
  • Explorer 11 - . Payload: S-15. Mass: 37 kg (81 lb). Nation: USA. Agency: NASA. Program: Explorer. Class: Astronomy. Type: Solar satellite. Spacecraft: S-15. USAF Sat Cat: 107 . COSPAR: 1961-Nu-1. Apogee: 1,458 km (905 mi). Perigee: 480 km (290 mi). Inclination: 28.8000 deg. Period: 104.50 min. Gamma ray data. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B). .

1961 May 24 - . 19:48 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC26B. LV Family: Jupiter. Launch Vehicle: Juno II. FAILURE: Second Stage failed to ignite.. Failed Stage: 2.
  • Explorer S-45A - . Payload: S-45A. Mass: 33 kg (72 lb). Nation: USA. Agency: NASA. Program: Explorer. Class: Astronomy. Type: Solar satellite. Spacecraft Bus: P. Spacecraft: P-14. Decay Date: 1961-05-24 .


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