List of Proton launches (1965–69)
Launches
Date/Time (UTC) Configuration Serial numberLaunch pad Outcome

List of Proton launches (1965–69)

Section Title: Launches
Table Section Text: Date/Time (UTC) Configuration Serial numberLaunch pad Outcome

Date/Time (UTC)	Configuration	Serial number	Launch pad	Outcome

Payload	Separation orbit	Operator	Function

Remarks

1965[edit] Main article: 1965 in spaceflight

16 July 1965 11:16	UR-500 8K82	107207-01	Site 81/23	Successful

Proton 1 (N-4 #1)	Low Earth	Particle research

Maiden flight of UR-500 8K82

2 November 1965 12:28	UR-500 8K82	UR500-209	Site 81/23	Successful

Proton 2 (N-4 #2)	Low Earth	Particle research

1966[edit] Main article: 1966 in spaceflight

24 March 1966 21:00	UR-500 8K82	UR500-211	Site 81/23	Failure

N-4 #3	Low Earth (intended)	Particle research

2nd stage engine failure T+122 seconds. Suspected collision with the first stage following separation.

6 July 1966 12:57	UR-500 8K82	UR500-212	Site 81/23	Successful

Proton 3 (N-4 #4)	Low Earth	Particle research

Final flight of UR-500 8K82

1967[edit] Main article: 1967 in spaceflight

10 March 1967 11:30	UR-500K/D 8K82K/11S824	107227-01	Site 81/23	Successful

Kosmos 146 (Soyuz 7K-L1 #2P)	Highly elliptical	Spacecraft test

Maiden flight of UR-500K 8K82K (later Proton-K), first Proton launch with an upper stage

8 April 1967 09:00	Proton-K/D 8K82K/11S824	228-01	Site 81/23	Failure

Kosmos 154 (Soyuz 7K-L1 #3P)	Highly elliptical (intended) Low Earth (achieved)	Spacecraft test

Premature separation of fourth stage ullage motors

27 September 1967 22:11	Proton-K/D 8K82K/11S824	229-01	Site 81/23	Failure

Soyuz 7K-L1 #4L	Highly elliptical (intended)	Spacecraft test

#1 first stage engine failed to start at liftoff due to a loose plug. Automatic shutdown commanded at T+97 seconds.

22 November 1967 19:07	Proton-K/D 8K82K/11S824	230-01	Site 81/24	Failure

Soyuz 7K-L1 #5L	Highly elliptical (intended)	Spacecraft test

First launch from Site 81/24. Second stage engine failure due to improper start sequence.

1968[edit] Main article: 1968 in spaceflight

2 March 1968 22:11	Proton-K/D 8K82K/11S824	231-01	Site 81/23	Successful

Zond 4 (Soyuz 7K-L1 #6L)	Highly elliptical	Spacecraft test

Spacecraft later failed

22 April 1968 23:01	Proton-K/D 8K82K/11S824	232-01	Site 81/24	Failure

Soyuz 7K-L1 #7L	Highly elliptical (intended)	Spacecraft test

LES malfunction trigged an unintended second stage shutdown. Spacecraft descent module successfully recovered.

14 September 1968 21:42	Proton-K/D 8K82K/11S824	234-01	Site 81/23	Successful

Zond 5 (Soyuz 7K-L1 #9L)	Highly elliptical	Spacecraft test

10 November 1968 19:11	Proton-K/D 8K82K/11S824	235-01	Site 81/23	Successful

Zond 6 (Soyuz 7K-L1 #12L)	Highly elliptical	Spacecraft test

Spacecraft later failed

16 November 1968 11:40	Proton-K/D 8K82K/11S824	236-01	Site 81/24	Successful

Proton 4 (N-6 #1)	Low Earth	Cosmic ray research

First Proton-K launch without an upper stage

1969[edit] Main article: 1969 in spaceflight

20 January 1969 04:14	Proton-K/D 8K82K/11S824	237-01	Site 81/23	Failure

Soyuz 7K-L1 #13L	Highly elliptical (intended)	Spacecraft test

#3 second stage engine failed due to rotor imbalance. The other three engines managed to complete second stage burn successfully, but the third stage then failed due to a propellant feed malfunction.

19 February 1969 06:48	Proton-K/D 8K82K/11S824	239-01	Site 81/24	Failure

Luna E-8 #201	Highly elliptical (intended)	Lunar lander

Payload fairing broke up T+51 seconds. First stage exploded after flying debris ruptured the propellant tanks.

27 March 1969 10:40	Proton-K/D 8K82K/11S824	240-01	Site 81/23	Failure

Mars-2M #521	Heliocentric (intended)	Mars orbiter

Third stage engine failure due to rotor imbalance.

2 April 1969 10:33	Proton-K/D 8K82K/11S824	233-01	Site 81/24	Failure

Mars-2M #522	Heliocentric (intended)	Mars orbiter

Missing drain plug caused a first stage engine failure and thrust section fire at liftoff. Booster impacted the ground 40 seconds after launch.

14 June 1969 04:00	Proton-K/D 8K82K/11S824	238-01	Site 81/24	Failure

Luna E-8-5 #402	Highly elliptical (intended)	Lunar sample return

Blok D ignition failure

13 July 1969 02:54	Proton-K/D 8K82K/11S824	242-01	Site 81/24	Successful

Luna 15 (Luna E-8-5 #401)	Highly elliptical	Lunar sample return

Spacecraft later failed

7 August 1969 23:48	Proton-K/D 8K82K/11S824	243-01	Site 81/23	Successful

Zond 7 (Soyuz 7K-L1 #11)	Highly elliptical	Spacecraft test

23 September 1969 14:07	Proton-K/D 8K82K/11S824	244-01	Site 81/24	Failure

Kosmos 300 (Luna E-8-5 #403)	Highly elliptical (intended) Low Earth (achieved)	Lunar sample return

Blok D failure due to defective LOX valve

22 October 1969 14:09	Proton-K/D 8K82K/11S824	241-01	Site 81/24	Failure

Kosmos 305 (Luna E-8-5 #404)	Highly elliptical (intended) Low Earth (achieved)	Lunar sample return

Upper control system malfunctioned

28 November 1969 09:00	Proton-K/D 8K82K/11S824	245-01	Site 81/23	Failure

Soyuz 7K-L1E #1	Medium Earth (intended)	Test flight

Third stage engine failure T+556 seconds due to resonant vibration causing the rupture of a propellant feed line.

Sentence(s)

On 22 November 1967, at 19:07 the Proton-K/D 8K82K/11S824 with 230-01 on Site 81/24 was Failure and Soyuz 7K-L1 #5L a highly elliptical (intended) Spacecraft test was first launched from Site 81/24.

final_sentence: On 22 November 1967, at 19:07 the Proton-K/D 8K82K/11S824 with 230-01 on Site 81/24 was Failure and Soyuz 7K-L1 #5L a highly elliptical (intended) Spacecraft test was first launched from Site 81/24.