Last update:  2025-11-28
« Rockets

Juno I

StatusRetired
Rocket familyRedstone
CountryUnited States
ManufacturerChrysler
Number of orbital launches6
First launch1958-02-01
Last launch1958-10-23
Juno I was a modified Jupiter-C rocket equipped with a fourth stage, capable of launching small payloads into low orbit.


Launches:

Launch dateLaunch siteRocket / VariantPayloadNotesStatus
1958-10-23Cape CanaveralJuno I Beacon 1 failure
Upper stages separated prior to burnout. Structural failure after 149 sec due to vibration disturbances generated by the spinning payload.
1958-08-24Cape CanaveralJuno I Explorer 5failure
First Stage collided with upper stages. Second Stage ignited in wrong direction.
1958-07-26Cape CanaveralJuno I Explorer 4success
1958-03-26Cape CanaveralJuno I Explorer 3success
1958-03-05Cape CanaveralJuno I Explorer 2failure
Fourth Stage failed to ignite.
1958-02-01Cape CanaveralJuno I Explorer 1success

Variants:

(This section is under construction)

Juno I Base variant

First launch1958-02-01
Mass29.06 t
Height21.2 m
Payload capacity:
LEO11 kg
Updated once to twice a month.  Last update:  2025-11-28
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