Venera 12

 1978-086A

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Venera-12 (4V-1 No. 361) was launched on 1978 Sep 14 as part of the Venera-78 project.

Venera-12
Date	Time	Event	Orbit
1978 Sep 14	0225:13	Launch by Proton-K	KB
		T+2m St 1 sep
		T+5m St 2 sep
		T+5m GO sep
	0235	T+9m St 3 MECO
	0239?	Blok-D burn 1
	0241?	Blok-D MECO-1
	0352?	Blok-D MES-2
	0359:49	Solar orbit insertion
1978 Sep 14	1200?	Pass EL1:4
1978 Sep 18	1330?	Leave Earth sphere
1978 Sep 21	0900	TCM1 13m/s
1978 Dec 14	0350	TCM2 2.5m/s
1978 Dec 18	1530?	Enter Venus sphere
1978 Dec 19	0228?	SA sep
1978 Dec 21	0326:41	Venus encounter 40412 km C/A, 34360 km alt
1978 Dec 23	1330?	Leave Venus sphere
1978 Dec			330.3 d 107 x 173 Mkm
1979 Feb 5		TCM3 335m/s	108.5 x 178.3 Mkm
1980 Apr		end of ops

1978-086C

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The V12 landing site had 91 atm, 741K.

Venera-12 SA
Date	Time	Event	Orbit
1978 Sep 14		Launch by Proton-K	KB
1978 Dec 19		Sep from Venera-12
1978 Dec 21	0228:37	Entry, 125 km at 11.2 km/s -19 deg	-446 x -43724
1978 Dec 21	0229:42	Lid off, pilot chute
	0230:17	Sonic relief chute (11s)
1978 Dec 21	0230:28	Sonic relief jettisoned with upper shield
1978 Dec 21	0230:28	Braking chute out
1978 Dec 21	0230:32	Lower shield off, instruments on
1978 Dec 21	0238:19	Braking chute off
1978 Dec 21	0330:30	Landing -7,294
1978 Dec 21	0520	end of tx after 110 min