Kosmos 402

  1971-025A

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The next US-A flight was Kosmos-402, launched in Apr 1971. It again tested the reactor separation system after only one day.

Kosmos-402
Date	Time	Event	Orbit
1971 Apr 1	1130:00	Launch by 11K69	KB
	1132	Stage 2 burn
	1134	Stage 2 sep
	1144	US-A DU burn
		US-A DU cutoff, orbit
	1154?	Stage 2 entry
	1200		89.71 247 x 274 x 65.0
1971 Apr 1	1441?	US-A orbit raise over KB, DU sep
	1533?	DV2
	1926		104.95 949 x 1034 x 65.0
1971 Apr 3	1407	(25B)	89.59 246 x 261 x 65.0
1971 Apr 6		DU reentered
1971 Apr 9	1430	Reactor section	104.94 948 x 1036 x 65.0 (25A)
1971 May 6	1355?	Radar section reentered

The Country Club

 https://welib.org/md5/91766dbe7beaf345b4b19a9313ac51e6

Kosmos 597

  1973-071A

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The next Zenit-4MK launch returned to use of the 11A57 launch vehicle. The 6 day mission of Kosmos-597 was flown during the Yom Kippur war.

Kosmos-597
Date	Time	Event	Orbit
1973 Oct 6	1230:00	Launch by 11A57	PL
	1234	Blok-I burn
	1238	Blok-I sep
	1813		89.56 205 x 289 x 65.4
	1900		89.45 206 x 290 x 65.42 (RAE)
1973 Oct 7	0011		89.43 204 x 288 x 65.4
		Lower orbit
1973 Oct 8	1430		89.07 207 x 251 x 65.42 (RAE)
	1501		89.07 206 x 250 x 65.4
1973 Oct 11	0355	Engine sep	88.75 200 x 226 x 65.45 (RAE)
1973 Oct 11	1200		89.03 202 x 250 x 65.4
1973 Oct 12	0630?	Retrofire
	0640?	PO sep
	0646?	Entry
	0700?	Landed after 5.8d

Teen: July 2000

 https://welib.org/md5/f8d40713f04a71a788ecb8b87b3adfb2