Information Please Almanac, Atlas and Yearbook 1977

 https://welib.org/md5/66ad4ac36f5b8516e37d870608c01af5

Kosmos 264

 1969-008A

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The second Zenit-4M mission lasted a record 12.9 days and used an unusual 69.9 degree inclination orbit. It carried a supplementary experiment to study gamma rays. At one point the spacecraft passed close to a GAMBIT satellite, causing some concern at NRO.

Kosmos-264
Date	Time	Event	Orbit
1969 Jan 23	0915:00	Launch by 11A57	KB
	0919	Blok-I burn
	0923	Blok-I sep
	1935		89.60 206 x 303 x 69.90
1969 Jan 24	1758		89.52 207 x 293 x 69.9
1969 Jan 25	1751		89.54 206 x 297 x 69.9
1969 Feb 1	1531		89.28 205 x 271 x 69.9
1969 Feb 3	0743		89.71 203 x 316 x 69.9
1969 Feb 4	0908		89.70 207 x 311 x 69.9
1969 Feb 5	0600?	Deorbit
	0610?	PO sep
	0616?	Entry
	0630?	Landed

Shinsei

 1971-080A

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The MS-F2 satellite was named Shinsei (Nova) once on orbit. The satellite was similar to MS-F1 and returned data on the ionosphere.

M-42-3 Mass of stage 4 plus payload is 500 f 137 em. Prop mas 363 kg. Payload mass 66 kg implying M-40 is 434f 71 em. Isp 276.0s?

Shinsei
Date	Time	Event	Orbit
1971 Sep 28	0400	Launch by Mu-4S-3	KASC
		T+0:07 SB burnout
		T+0:09 SB sep
		T+1:01 St 1 burnout
		T+1:21 Upper fairing sep
		T+1:22 Lower fairing sep
		T+1:23? St 1 sep
	0401 T+1:26? St 2 burn
		T+2:32? St 2 burnout
		T+2:42? St 2 sep
		T+2:43? St 3 burn
		T+3:25? St 3 burnout	-5212 x 980?
	0403?	T+3:45? St 3 sep	-5025 x 875 x 31.46
	0411	T+11:03? St 4 burn 40s
	0412	T+11:43? St 4 burnout
	0415	T+15:00 St 4 sep	112.9 869 x 1865 x 32.1
1972 Jan		Tape recorder failed
1975 Jan		Still operating