Editing Juno I (section)

== Launch history ==
Juno I was launched six times by [[Army Ballistic Missile Agency|ABMA]] in 1958, intending to place satellites in [[Low Earth orbit|LEO]].<ref name=":0" /><ref name=":1" />

Following the successful launch of [[Explorer 1]] on February 1, 1958, the first U.S. satellite, Juno I made five more launches before being retired in favor of [[Juno II]].<ref name=":0" /> Although Juno I's launch of the [[Explorer 1]] satellite was a huge success for the U.S. space program, only two of its remaining five flights were successful, [[Explorer 3]] and [[Explorer 4]],<ref name="Boehm-NASA">{{cite report |url=https://www.nasa.gov/sites/default/files/atoms/files/explorer_i_boehm_document.pdf |first1=J. |last1=Boehm |first2=H.J. |last2=Fichtner |first3=Otto A. |last3=Hoberg |title=Explorer satellites launched by Juno 1 and Juno 2 vehicles |publisher=NASA |location=US}}{{PD-notice}}</ref> giving the Juno I vehicle a mission total success ratio of 50%.<ref name=":0" /> The Juno I vehicle was replaced by the [[Juno II]] in 1959.

The American public was happy and relieved that America had finally managed to launch a satellite after the launch failures in the Vanguard and [[Viking (rocket)|Viking]] series. With the relative success of the Juno I program, von Braun developed the [[Juno II]], using a [[PGM-19 Jupiter]] first stage, rather than a Redstone.

{| class="wikitable sortable plainrowheaders"
|+Juno I launches<ref name=":0" /><ref name=":1">{{Cite web |title=Juno-1 (5 stage) |url=https://space.skyrocket.de/doc_lau_det/juno-1_5st.htm |access-date=2023-10-15 |website=Gunter's Space Page |language=en}}</ref>
|-
! scope="col" | Flight No.
! scope="col" | Date / time ([[Greenwich Mean Time|GMT]])
! scope="col" | Rocket
! scope="col" | Launch site
! scope="col" | Payload
! scope="col" | Payload mass
! scope="col" | Outcome
!Comments
|-

! scope="row" style="text-align:center;" | 1
| February 1, 1958<br />03:47:56
| Juno I RS-29 (UE)
| [[Cape Canaveral Launch Complex 26|LC-26A]]
| [[Explorer 1]]
| 22 kg
| {{Success}}
|Maiden launch of Juno I. First American satellite launched. Explorer 1 ceased transmission of data on May 23, 1958, when its batteries died, but remained in orbit for more than 12 years. It made a fiery reentry over the Pacific Ocean on March 31, 1970.
|-

! scope="row" style="text-align:center;" | 2
| March 5, 1958<br />18:27:57
| Juno I  RS-26 (UV)
| [[Cape Canaveral Launch Complex 26|LC-26A]]
| [[Explorer 2]]
| 23 kg
| {{Failure}}
|Fourth stage did not ignite.
|-

! scope="row" style="text-align:center;" | 3
| March 26, 1958<br />17:38:03
| Juno I RS-24 (UT)
| [[Cape Canaveral Launch Complex 5|LC-5]]
| [[Explorer 3]]
| 23 kg
| {{Success}}
|Decay from orbit on June 28, 1958.
|-

! scope="row" style="text-align:center;" | 4
| July 26, 1958<br />15:00:57
| Juno I RS-44 (TT)
| [[Cape Canaveral Launch Complex 5|LC-5]]
| [[Explorer 4]]
| 29 kg
| {{Success}}
|Decay from orbit on October 23, 1959.
|-

! scope="row" style="text-align:center;" | 5
| August 24, 1958<br />06:17:22
| Juno I RS-47 (TI)
| [[Cape Canaveral Launch Complex 5|LC-5]]
| [[Explorer 5]]
| 29 kg
| {{Failure}}
|Booster collided with second stage after separation, causing upper stage firing angle to be off.
|-

! scope="row" style="text-align:center;" | 6
| October 23, 1958<br />03:21:04
| Juno I, RS-49 (HE)
| [[Cape Canaveral Launch Complex 5|LC-5]]
| [[Project Beacon|Beacon 1]]
| 23 kg
| {{Failure}}
|Five stage version, Second stage separated prematurely from booster.
|-
|}