Zenit Satellites - Zenit-4M variant

Zenit-4M introduced the use of an orbit adjustment engine. Changing the orbit slightly allowed the ground track to be shifted and the satellite scheduled to pass directly over a selected target or allow repeated daily visits to the same area.

The engine was attached to the forward end of the craft in the same position of the Nauka modules of the Zenit-2M. Retro-fire was still performed by the engine carried in the instrument unit at the opposite end of the vehicle.

Cosmos 328 - on the basis of the radio transmissions detected by the Kettering Grammar School Satellite Tracking Group it was quite clearly a Zenit-2M. However, most listings on the Worlwide Web (that probably have a common source) incorrectly show it as a Zenit-4MK. Without the tracking information, it is not possible to distinguish the two types so the error would go unnoticed without access to additional information.

Cosmos 251(Zenit-4M 11Ф691, Rotor) 1968-096A 3528
1968 Oct 31, 09:15 UTC Baikonur Cosmodrome Voskhod, 11A57	1968 Oct 31, 19:30: 199 x 255 km, 64.95 deg, 89.0 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit. First launch in the series. The cameras and film were recovered from orbit. Undertook radio astronomy and gamma ray experiments.
Landed: 1968 Nov 12, 05:47	HF Transmit: 19.995 MHz, Morse Code

Cosmos 264(Zenit-4M 11Ф691, Rotor) 1969-008A 3667
1969 Jan 23, 09:15 UTC Baikonur Cosmodrome Voskhod, 11A57	1969 Jan 24, 07:31: 209 x 293 km, 69.92 deg, 89.5 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit. Undertook radio astronomy and gamma ray experiments.
Landed: 1969 Feb 5, 06:28	HF Transmit: 19.995 MHz, Morse Code

Cosmos 280(Zenit-4M 11Ф691, Rotor) 1969-040A 3906
1969 Apr 23, 09:55 UTC Baikonur Cosmodrome Voskhod, 11A57	1969 Apr 27, 10:08: 206 x 246 km, 51.61 deg, 89.0 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit. Also conducted meteorological experiments.
Landed: 1969 May 6, 06:47 Recovery beacon: TK	HF Transmit: 19.995 MHz, Morse Code

Cosmos 328(Zenit-4M 11Ф691, Rotor) 1970-022A 4355
1970 Mar 27, 11:45 UTC Plesetsk Cosmodrome Voskhod, 11A57	1970 Apr 01, 18:34: 200 x 305 km, 72.89 deg, 89.5 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1970 Apr 9, 06:42 Recovery beacon: TK	HF Transmit: 19.995 MHz, Morse Code

Cosmos 333(Zenit-4M 11Ф691, Rotor) 1970-030A 4373
1970 Apr 15, 09:00 UTC Plesetsk Cosmodrome Voskhod, 11A57	1970 Apr 19, 13:45: 213 x 233 km, 81.35 deg, 89.0 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1970 Apr 28, 05:34 Recovery beacon: TK	HF Transmit: 19.150 MHz, Morse Code

Cosmos 360(Zenit-4M 11Ф691, Rotor) 1970-068A 4508
1970 Aug 29, 08:30 UTC Baikonur Cosmodrome Voskhod, 11A57	1970 Aug 31, 17:01: 204 x 311 km, 65.00 deg, 89.7 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1970 Sep 8, 07:00	HF Transmit: 19.150 MHz, Morse Code

Cosmos 361(Zenit-4M 11Ф691, Rotor) 1970-071A 4524
1970 Sep 8, 10:30 UTC Plesetsk Cosmodrome Voskhod, 11A57	1970 Sep 09, 01:14: 207 x 297 km, 72.87 deg, 89.5 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1970 Sep 21, 04:22	HF Transmit: 19.150 MHz, Morse Code

Cosmos 370(Zenit-4M 11Ф691, Rotor) 1970-082A 4576
1970 Oct 9, 11:04 UTC Baikonur Cosmodrome Voskhod, 11A57	1970 Oct 10, 22:42: 202 x 287 km, 64.91 deg, 89.4 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1970 Oct 22, 07:08 Recovery beacon: TK	HF Transmit: 19.150 MHz, Morse Code

Cosmos 376(Zenit-4M 11Ф691, Rotor) 1970-092A 4599
1970 Oct 30, 13:20 UTC Plesetsk Cosmodrome Voskhod, 11A57	1970 Oct 31, 20:24: 206 x 285 km, 65.38 deg, 89.4 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1970 Nov 12, 06:43 Recovery beacon: TK	HF Transmit: 19.150 MHz, Morse Code

Cosmos 386(Zenit-4M 11Ф691, Rotor) 1970-110A 4804
1970 Dec 15, 10:00 UTC Baikonur Cosmodrome Voskhod, 11A57	1970 Dec 16, 11:10: 214 x 275 km, 64.99 deg, 89.4 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1970 Dec 28, 06:03	HF Transmit: 19.150 MHz, Morse Code

Cosmos 390(Zenit-4M 11Ф691, Rotor) 1971-001A 4845
1971 Jan 12, 09:30 UTC Baikonur Cosmodrome Voskhod, 11A57	1971 Jan 12, 16:48: 202 x 277 km, 65.01 deg, 89.3 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1971 Jan 25, 05:30 Recovery beacon: TK	HF Transmit: 19.990 MHz, FSK?

Cosmos 396(Zenit-4M 11Ф691, Rotor) 1971-014A 4959
1971 Feb 18, 13:59 UTC Plesetsk Cosmodrome Voskhod, 11A57	1971 Feb 18, 21:12: 206 x 285 km, 65.41 deg, 89.4 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1971 Mar 3, 06:59 Recovery beacon: TK	HF Transmit: 19.150 MHz, Morse Code

Cosmos 399(Zenit-4M 11Ф691, Rotor) 1971-017A 5003
1971 Mar 3, 09:30 UTC Baikonur Cosmodrome Voskhod, 11A57	1971 Mar 04, 15:09: 200 x 283 km, 65.00 deg, 89.3 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1971 Mar 17, 05:35	HF Transmit: 19.150 MHz, Morse Code

Cosmos 401(Zenit-4M 11Ф691, Rotor) 1971-023A 5086
1971 Mar 27, 10:59 UTC Plesetsk Cosmodrome Voskhod, 11A57	1971 Mar 28, 01:43: 202 x 299 km, 72.81 deg, 89.5 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1971 Apr 9, 06:22 Recovery beacon: TK	HF Transmit: 19.150 MHz, Morse Code

Cosmos 406(Zenit-4M 11Ф691, Rotor) 1971-029A 5124
1971 Apr 14, 08:00 UTC Plesetsk Cosmodrome Voskhod, 11A57	1971 Apr 14, 10:47: 216 x 244 km, 81.32 deg, 89.1 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1971 Apr 24, 04:13	HF Transmit: 19.150 MHz, Morse Code

Cosmos 420(Zenit-4M 11Ф691, Rotor) 1971-043A 5230
1971 May 18, 08:00 UTC Baikonur Cosmodrome Voskhod, 11A57	1971 May 19, 11:56: 200 x 257 km, 51.76 deg, 89.1 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1971 May 29, 06:37 Recovery beacon: TK	HF Transmit: 19.150 MHz, Morse Code 19.300 MHz (changed 1971 May 27?)

Cosmos 424(Zenit-4M 11Ф691, Rotor) 1971-048A 5248
1971 May 28, 10:30 UTC Plesetsk Cosmodrome Voskhod, 11A57	1971 May 30, 06:57: 198 x 286 km, 65.37 deg, 89.3 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1971 Jun 10, 03:44	HF Transmit: 19.150 MHz, Morse Code?

Cosmos(Zenit-4M 11Ф691, Rotor)
1971 Jun 25, 00:00 UTC Plesetsk Cosmodrome Voskhod, 11A57
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor - failed to reach orbit.
Not Recovered

Cosmos 429(Zenit-4M 11Ф691, Rotor) 1971-061A 5331
1971 Jul 20, 10:00 UTC Baikonur Cosmodrome Voskhod, 11A57	1971 Jul 20, 18:42: 205 x 249 km, 51.75 deg, 89.0 min 1971 Jul 31, 10:43: 185 x 261 km, 51.78 deg, 89.0 min 1971 Aug 01, 22:16: 183 x 259 km, 51.75 deg, 88.9 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1971 Aug 2, 07:40	HF Transmit: 19.150 MHz, Morse Code 19.300 MHz (changed 1971 Jul 22?)

Cosmos 430(Zenit-4M 11Ф691, Rotor) 1971-062A 5340
1971 Jul 23, 11:00 UTC Plesetsk Cosmodrome Voskhod, 11A57	1971 Jul 24, 01:41: 198 x 304 km, 65.42 deg, 89.5 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1971 Aug 5, 04:45	HF Transmit: 19.150 MHz, Morse Code

Cosmos 432(Zenit-4M 11Ф691, Rotor) 1971-066A 5379
1971 Aug 5, 10:00 UTC Baikonur Cosmodrome Voskhod, 11A57	1971 Aug 06, 16:56: 194 x 259 km, 51.74 deg, 89.0 min 1971 Aug 12, 03:20: 187 x 254 km, 51.77 deg, 88.9 min 1971 Aug 14, 02:44: 187 x 263 km, 51.76 deg, 89.0 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1971 Aug 18, 08:00 Recovery beacon: TK	HF Transmit: 19.150 MHz, Morse Code

Cosmos(Zenit-4M 11Ф691, Rotor)
1971 Aug 19, 00:00 UTC Baikonur Cosmodrome Voskhod, 11A57
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor - failed to reach orbit.
Not Recovered

Cosmos 441(Zenit-4M 11Ф691, Rotor) 1971-081A 5486
1971 Sep 28, 07:40 UTC Baikonur Cosmodrome Voskhod, 11A57	1971 Sep 29, 16:13: 173 x 259 km, 65.02 deg, 88.8 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1971 Oct 10, 05:07	HF Transmit: 19.150 MHz, Morse Code?

Cosmos 442(Zenit-4M 11Ф691, Rotor) 1971-084A 5493
1971 Sep 29, 11:30 UTC Plesetsk Cosmodrome Voskhod, 11A57	1971 Sep 29, 23:14: 196 x 302 km, 72.89 deg, 89.5 min 1971 Oct 04, 22:29: 174 x 314 km, 72.84 deg, 89.4 min 1971 Oct 07, 04:12: 178 x 331 km, 72.86 deg, 89.6 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1971 Oct 12, 05:31	HF Transmit: 19.990 MHz, FSK?

Cosmos 452(Zenit-4M 11Ф691, Rotor) 1971-088A 5558
1971 Oct 14, 09:00 UTC Baikonur Cosmodrome Voskhod, 11A57	1971 Oct 15, 08:37: 197 x 259 km, 64.97 deg, 89.1 min 1971 Oct 18, 19:38: 177 x 277 km, 64.98 deg, 89.0 min 1971 Oct 19, 11:59: 176 x 315 km, 64.98 deg, 89.4 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1971 Oct 27, 04:59	HF Transmit: 19.150 MHz, Morse Code?

Cosmos 454(Zenit-4M 11Ф691, Rotor) 1971-094A 5585
1971 Nov 2, 14:25 UTC Plesetsk Cosmodrome Voskhod, 11A57	1971 Nov 02, 21:36: 202 x 261 km, 65.48 deg, 89.1 min 1971 Nov 03, 18:24: 203 x 260 km, 65.41 deg, 89.1 min 1971 Nov 04, 10:46: 200 x 352 km, 65.44 deg, 90.0 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1971 Nov 16, 06:43	HF Transmit: 19.150 MHz, Morse Code?

Cosmos 456(Zenit-4M 11Ф691, Rotor) 1971-098A 5611
1971 Nov 19, 12:00 UTC Plesetsk Cosmodrome Voskhod, 11A57	1971 Nov 20, 10:12: 202 x 305 km, 72.87 deg, 89.6 min 1971 Nov 25, 12:09: 175 x 282 km, 72.87 deg, 89.1 min 1971 Nov 26, 20:58: 187 x 356 km, 72.85 deg, 89.9 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1971 Dec 2, 06:16	HF Transmit: 19.150 MHz, Morse Code

Cosmos 463(Zenit-4M 11Ф691, Rotor) 1971-107A 5661
1971 Dec 6, 09:50 UTC Baikonur Cosmodrome Voskhod, 11A57	1971 Dec 07, 19:53: 182 x 266 km, 64.97 deg, 89.0 min 1971 Dec 09, 13:25: 181 x 295 km, 64.96 deg, 89.3 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1971 Dec 11, 08:57	HF Transmit: 19.150 MHz, Morse Code 19.300 MHz (changed 1971 Dec 9?)

Cosmos 464(Zenit-4M 11Ф691, Rotor) 1971-108A 5670
1971 Dec 10, 11:00 UTC Plesetsk Cosmodrome Voskhod, 11A57	1971 Dec 11, 10:54: 204 x 379 km, 72.86 deg, 90.3 min 1971 Dec 13, 17:02: 179 x 310 km, 72.85 deg, 89.4 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1971 Dec 16, 07:54	HF Transmit: 19.150 MHz, Morse Code?

Cosmos 466(Zenit-4M 11Ф691, Rotor) 1971-112A 5687
1971 Dec 16, 09:39 UTC Baikonur Cosmodrome Voskhod, 11A57	1971 Dec 17, 06:23: 204 x 281 km, 64.98 deg, 89.4 min 1971 Dec 20, 05:39: 178 x 275 km, 64.98 deg, 89.0 min 1971 Dec 20, 13:07: 182 x 366 km, 65.00 deg, 90.0 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1971 Dec 27, 07:28	HF Transmit: 19.150 MHz, Morse Code

Cosmos 471(Zenit-4M 11Ф691, Rotor) 1972-001A 5764
1972 Jan 12, 09:59 UTC Baikonur Cosmodrome Voskhod, 11A57	1972 Jan 12, 18:50: 200 x 316 km, 65.00 deg, 89.7 min 1972 Jan 14, 03:38: 176 x 306 km, 65.05 deg, 89.3 min 1972 Jan 15, 04:57: 186 x 293 km, 64.99 deg, 89.3 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1972 Jan 25, 06:10	HF Transmit: 19.150 MHz, Morse Code

Cosmos 474(Zenit-4M 11Ф691, Rotor) 1972-008A 5839
1972 Feb 16, 09:30 UTC Baikonur Cosmodrome Voskhod, 11A57	1972 Feb 17, 09:19: 213 x 316 km, 64.97 deg, 89.8 min 1972 Feb 17, 18:16: 178 x 321 km, 64.95 deg, 89.5 min 1972 Feb 21, 13:16: 177 x 317 km, 64.97 deg, 89.5 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1972 Feb 29, 06:10	HF Transmit: 19.150 MHz, Morse Code

Cosmos 478(Zenit-4M 11Ф691, Rotor) 1972-015A 5885
1972 Mar 15, 13:00 UTC Plesetsk Cosmodrome Voskhod, 11A57	1972 Mar 16, 03:40: 204 x 294 km, 65.39 deg, 89.5 min 1972 Mar 19, 16:24: 176 x 274 km, 65.39 deg, 89.0 min 1972 Mar 21, 18:57: 174 x 362 km, 65.37 deg, 89.9 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1972 Mar 28, 05:20	HF Transmit: 19.150 MHz, Morse Code

Cosmos 483(Zenit-4M 11Ф691, Rotor) 1972-024A 5924
1972 Apr 3, 10:15 UTC Plesetsk Cosmodrome Voskhod, 11A57	1972 Apr 04, 01:00: 204 x 318 km, 72.85 deg, 89.7 min 1972 Apr 05, 00:53: 175 x 307 km, 72.85 deg, 89.3 min 1972 Apr 05, 11:19: 179 x 333 km, 72.83 deg, 89.6 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1972 Apr 15, 06:02 Recovery beacon: TK	HF Transmit: 19.150 MHz, Morse Code 19.300 MHz (changed 1972 Apr 13?)

Cosmos 486(Zenit-4M 11Ф691, Rotor) 1972-030A 5945
1972 Apr 14, 08:00 UTC Plesetsk Cosmodrome Voskhod, 11A57	1972 Apr 15, 00:09: 222 x 232 km, 81.32 deg, 89.0 min 1972 Apr 17, 09:47: 173 x 228 km, 81.33 deg, 88.5 min 1972 Apr 18, 07:56: 174 x 276 km, 81.33 deg, 89.0 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1972 Apr 27, 04:10	HF Transmit: 19.150 MHz, Morse Code

Cosmos 491(Zenit-4M 11Ф691, Rotor) 1972-038A 6035
1972 May 25, 06:35 UTC Baikonur Cosmodrome Voskhod, 11A57	1972 May 25, 16:52: 200 x 287 km, 65.00 deg, 89.4 min 1972 May 26, 13:42: 177 x 268 km, 64.98 deg, 88.9 min 1972 May 27, 07:30: 175 x 320 km, 65.00 deg, 89.4 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1972 Jun 8, 02:29	HF Transmit: 19.150 MHz, Morse Code

Cosmos 492(Zenit-4M 11Ф691, Rotor) 1972-040A 6049
1972 Jun 9, 06:59 UTC Baikonur Cosmodrome Voskhod, 11A57	1972 Jun 09, 17:20: 204 x 322 km, 64.96 deg, 89.8 min 1972 Jun 10, 09:47: 163 x 334 km, 64.98 deg, 89.5 min 1972 Jun 15, 03:02: 172 x 311 km, 64.97 deg, 89.3 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1972 Jun 22, 03:49 Recovery beacon: TK	HF Transmit: 19.150 MHz, Morse Code

Cosmos 495(Zenit-4M 11Ф691, Rotor) 1972-044A 6060
1972 Jun 23, 11:19 UTC Plesetsk Cosmodrome Voskhod, 11A57	1972 Jun 24, 10:54: 201 x 277 km, 65.41 deg, 89.3 min 1972 Jun 26, 22:25: 200 x 275 km, 65.42 deg, 89.2 min 1972 Jun 28, 11:31: 170 x 320 km, 65.42 deg, 89.4 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1972 Jul 6, 04:30	HF Transmit: 19.150 MHz, Morse Code?

Cosmos 499(Zenit-4M 11Ф691, Rotor) 1972-051A 6090
1972 Jul 6, 10:40 UTC Baikonur Cosmodrome Voskhod, 11A57	1972 Jul 06, 14:56: 210 x 289 km, 51.79 deg, 89.5 min 1972 Jul 10, 13:43: 175 x 253 km, 51.75 deg, 88.8 min 1972 Jul 11, 23:48: 178 x 293 km, 51.77 deg, 89.2 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1972 Jul 17, 08:00 Recovery beacon: TK	HF Transmit: 19.150 MHz, Morse Code

Cosmos 503(Zenit-4M 11Ф691, Rotor) 1972-056A 6114
1972 Jul 19, 13:45 UTC Plesetsk Cosmodrome Voskhod, 11A57	1972 Jul 20, 05:54: 205 x 284 km, 65.43 deg, 89.4 min 1972 Jul 21, 05:40: 170 x 283 km, 65.43 deg, 89.0 min 1972 Jul 21, 13:06: 170 x 320 km, 65.41 deg, 89.4 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1972 Aug 1, 06:58 Recovery beacon: TK	HF Transmit: 19.150 MHz, Morse Code

Cosmos 513(Zenit-4M 11Ф691, Rotor) 1972-060A 6135
1972 Aug 2, 08:15 UTC Baikonur Cosmodrome Voskhod, 11A57	1972 Aug 02, 18:35: 203 x 320 km, 64.98 deg, 89.7 min 1972 Aug 12, 04:45: 171 x 284 km, 64.96 deg, 89.1 min 1972 Aug 12, 10:43: 169 x 372 km, 64.97 deg, 89.9 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1972 Aug 15, 05:03 Recovery beacon: TK?	HF Transmit: 19.150 MHz, Morse Code

Cosmos(Zenit-4M 11Ф691, Rotor)
1972 Sep 2, 00:00 UTC Plesetsk Cosmodrome Voskhod, 11A57
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor - failed to reach orbit.
Not Recovered

Cosmos 519(Zenit-4M 11Ф691, Rotor) 1972-071A 6188
1972 Sep 16, 08:20 UTC Baikonur Cosmodrome Voskhod, 11A57	1972 Sep 17, 11:10: 214 x 352 km, 71.27 deg, 90.2 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1972 Sep 26, 05:55 Recovery beacon: TK	HF Transmit: 19.150 MHz, Morse Code

Cosmos 522(Zenit-4M 11Ф691, Rotor) 1972-077A 6219
1972 Oct 4, 12:00 UTC Plesetsk Cosmodrome Voskhod, 11A57	1972 Oct 05, 13:14: 201 x 320 km, 72.92 deg, 89.7 min 1972 Oct 09, 11:26: 203 x 313 km, 72.84 deg, 89.7 min 1972 Oct 11, 09:42: 172 x 351 km, 72.84 deg, 89.7 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1972 Oct 17, 06:53	HF Transmit: 19.150 MHz, Morse Code

Cosmos 538(Zenit-4M 11Ф691, Rotor) 1972-099A 6311
1972 Dec 14, 13:40 UTC Plesetsk Cosmodrome Voskhod, 11A57	1972 Dec 15, 13:16: 204 x 283 km, 65.43 deg, 89.4 min 1972 Dec 19, 13:52: 182 x 276 km, 65.42 deg, 89.1 min 1972 Dec 22, 04:25: 183 x 305 km, 65.41 deg, 89.4 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1972 Dec 27, 07:10	HF Transmit: 19.150 MHz, Morse Code

Cosmos 543(Zenit-4M 11Ф691, Rotor) 1973-002A 6339
1973 Jan 11, 10:00 UTC Baikonur Cosmodrome Voskhod, 11A57	1973 Jan 11, 17:20: 202 x 310 km, 64.99 deg, 89.6 min 1973 Jan 12, 02:18: 203 x 308 km, 64.97 deg, 89.6 min 1973 Jan 12, 15:43: 172 x 307 km, 64.95 deg, 89.3 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1973 Jan 24, 06:11	HF Transmit: 19.150 MHz, Morse Code

Cosmos 548(Zenit-4M 11Ф691, Rotor) 1973-008A 6359
1973 Feb 8, 13:15 UTC Plesetsk Cosmodrome Voskhod, 11A57	1973 Feb 09, 03:56: 205 x 299 km, 65.41 deg, 89.5 min 1973 Feb 10, 02:19: 205 x 299 km, 65.38 deg, 89.5 min 1973 Feb 10, 05:18: 166 x 299 km, 65.35 deg, 89.2 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1973 Feb 21, 06:38 Recovery beacon: TK	HF Transmit: 19.150 MHz, Morse Code

Cosmos 551(Zenit-4M 11Ф691, Rotor) 1973-012A 6378
1973 Mar 6, 09:20 UTC Baikonur Cosmodrome Voskhod, 11A57	1973 Mar 06, 18:09: 205 x 295 km, 65.00 deg, 89.5 min 1973 Mar 14, 21:16: 170 x 305 km, 65.00 deg, 89.2 min 1973 Mar 15, 10:42: 169 x 397 km, 65.01 deg, 90.2 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1973 Mar 20, 05:16	HF Transmit: 19.150 MHz, Morse Code

Cosmos 560(Zenit-4M 11Ф691, Rotor) 1973-031A 6652
1973 May 23, 10:30 UTC Plesetsk Cosmodrome Voskhod, 11A57	1973 May 24, 02:44: 202 x 313 km, 72.81 deg, 89.7 min 1973 May 26, 02:27: 180 x 306 km, 72.84 deg, 89.4 min 1973 May 27, 02:17: 176 x 323 km, 72.85 deg, 89.5 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1973 Jun 5, 04:32	HF Transmit: 19.150 MHz, Morse Code

Cosmos 563(Zenit-4M 11Ф691, Rotor) 1973-036A 6667
1973 Jun 6, 11:30 UTC Plesetsk Cosmodrome Voskhod, 11A57	1973 Jun 07, 00:41: 205 x 298 km, 65.40 deg, 89.5 min 1973 Jun 10, 16:31: 173 x 292 km, 65.41 deg, 89.1 min 1973 Jun 11, 11:50: 172 x 319 km, 65.37 deg, 89.4 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1973 Jun 18, 05:02	HF Transmit: 19.150 MHz, Morse Code 19.300 MHz (changed 1973 Jun 9?)

Cosmos 572(Zenit-4M 11Ф691, Rotor) 1973-038A 6684
1973 Jun 10, 10:10 UTC Baikonur Cosmodrome Voskhod, 11A57	1973 Jun 11, 09:47: 207 x 281 km, 51.65 deg, 89.4 min 1973 Jun 19, 13:23: 171 x 260 km, 51.65 deg, 88.8 min 1973 Jun 20, 05:41: 170 x 302 km, 51.67 deg, 89.2 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1973 Jun 23, 06:58 Recovery beacon: TK	HF Transmit: 19.150 MHz, Morse Code

Cosmos(Zenit-4M 11Ф691, Rotor)
1973 Jul 4, 00:00 UTC Plesetsk Cosmodrome Voskhod, 11A57
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor - failed to reach orbit.
Not Recovered

Cosmos 577(Zenit-4M 11Ф691, Rotor) 1973-048A 6745
1973 Jul 25, 11:30 UTC Plesetsk Cosmodrome Voskhod, 11A57	1973 Jul 25, 17:13: 206 x 288 km, 65.39 deg, 89.4 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1973 Aug 7, 04:34	HF Transmit: 19.150 MHz, Morse Code

Cosmos 579(Zenit-4M 11Ф691, Rotor) 1973-055A 6789
1973 Aug 21, 12:30 UTC Plesetsk Cosmodrome Voskhod, 11A57	1973 Aug 22, 16:36: 204 x 292 km, 65.42 deg, 89.5 min 1973 Aug 24, 07:16: 168 x 288 km, 65.42 deg, 89.1 min 1973 Aug 24, 16:13: 174 x 313 km, 65.42 deg, 89.4 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. First Zenit-4M to be detected at the secondary transmission frequency - 19.300 MHz. The cameras and film were recovered from orbit.
Landed: 1973 Sep 3, 05:25 Recovery beacon: TK?	HF Transmit: 19.150 MHz, Morse Code 19.300 MHz (changed 1973 Aug 23?)

Cosmos 581(Zenit-4M 11Ф691, Rotor) 1973-059A 6798
1973 Aug 24, 10:59 UTC Baikonur Cosmodrome Voskhod, 11A57	1973 Aug 25, 07:40: 208 x 289 km, 51.61 deg, 89.5 min 1973 Aug 25, 19:33: 174 x 285 km, 51.61 deg, 89.1 min 1973 Aug 31, 04:31: 170 x 272 km, 51.61 deg, 88.9 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1973 Sep 6, 07:44 Recovery beacon: TK	HF Transmit: 19.150 MHz, Morse Code

Cosmos 584(Zenit-4M 11Ф691, Rotor) 1973-063A 6818
1973 Sep 6, 10:40 UTC Plesetsk Cosmodrome Voskhod, 11A57	1973 Sep 06, 22:27: 204 x 336 km, 72.85 deg, 89.9 min 1973 Sep 09, 01:25: 204 x 333 km, 72.85 deg, 89.9 min 1973 Sep 10, 04:22: 205 x 263 km, 72.86 deg, 89.2 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1973 Sep 20, 04:42 Recovery beacon: TK	HF Transmit: 19.150 MHz, Morse Code

Cosmos 598(Zenit-4M 11Ф691, Rotor) 1973-072A 6862
1973 Oct 10, 10:45 UTC Plesetsk Cosmodrome Voskhod, 11A57	1973 Oct 10, 18:02: 206 x 333 km, 72.83 deg, 89.9 min 1973 Oct 13, 11:41: 207 x 241 km, 72.84 deg, 89.0 min 1973 Oct 14, 17:21: 203 x 245 km, 72.85 deg, 89.0 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1973 Oct 16, 06:49	HF Transmit: 19.150 MHz, Morse Code

Cosmos 600(Zenit-4M 11Ф691, Rotor) 1973-074A 6873
1973 Oct 16, 12:00 UTC Plesetsk Cosmodrome Voskhod, 11A57	1973 Oct 17, 04:17: 204 x 339 km, 72.85 deg, 89.9 min 1973 Oct 19, 11:27: 199 x 235 km, 72.83 deg, 88.8 min 1973 Oct 20, 12:38: 200 x 250 km, 72.81 deg, 89.0 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1973 Oct 23, 08:00	HF Transmit: 19.150 MHz, Morse Code

Cosmos 603(Zenit-4M 11Ф691, Rotor) 1973-079A 6900
1973 Oct 27, 11:09 UTC Plesetsk Cosmodrome Voskhod, 11A57	1973 Oct 28, 01:59: 200 x 359 km, 72.84 deg, 90.1 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1973 Nov 9, 05:45	HF Transmit: 19.150 MHz, Morse Code

Cosmos 609(Zenit-4M 11Ф691, Rotor) 1973-092A 6943
1973 Nov 21, 10:00 UTC Baikonur Cosmodrome Voskhod, 11A57	1973 Nov 23, 15:47: 173 x 338 km, 69.94 deg, 89.6 min 1973 Nov 27, 13:52: 173 x 330 km, 69.94 deg, 89.5 min 1973 Nov 29, 15:05: 172 x 291 km, 69.94 deg, 89.1 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1973 Dec 4, 06:52 Recovery beacon: TK	HF Transmit: 19.150 MHz, Morse Code

Cosmos 632(Zenit-4M 11Ф691, Rotor) 1974-006A 7117
1974 Feb 12, 08:56 UTC Baikonur Cosmodrome Voskhod, 11A57	1974 Feb 13, 02:40: 176 x 306 km, 65.00 deg, 89.3 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1974 Feb 26, 06:12	HF Transmit: 19.150 MHz, Morse Code

Cosmos 667(Zenit-4M 11Ф691, Rotor) 1974-057A 7383
1974 Jul 25, 07:00 UTC Baikonur Cosmodrome Voskhod, 11A57	1974 Jul 25, 15:49: 176 x 320 km, 64.99 deg, 89.5 min
Second generation imaging satellite equipped with film cameras for photo-reconnaissance and an orbit adjustment motor. The cameras and film were recovered from orbit.
Landed: 1974 Aug 7, 03:14	HF Transmit: 19.150 MHz, Morse Code?