Kosmos 821

  1976-048A

---

Kosmos-821
Date	Time	Event	Orbit
1976 May 26	0900	Launch by Soyuz-U	Plesetsk
	0904	Blok-I burn
	0908	Blok-I sep
1976 May 26			89.66 203 x 312 x 72.9
1976 May 29			89.55 167 x 336 x 72.8
1976 Jun 3			89.44 166 x 326 x 72.8
1976 Jun 4			89.57 166 x 339 x 72.8
1976 Jun 6			89.52 168 x 333 x 72.8
1976 Jun 8
	0416?	Deorbit
	0424?	PO sep
	0428?	Entry
	0445?	Landed

Seventeen: March 2003

 https://welib.org/md5/3a31a0d74421f99e93648f5e6d30dbb6

Venera 11

 1978-084A

---

4V-1 No. 360 was launched as the first Venera-78 probe, Venera-11.

Venera-11
Date	Time	Event	Orbit
1978 Sep 9	0325:39	Launch by Proton-K	KB
		T+2m St 1 sep
		T+5m St 2 sep
		T+5m GO sep
	0335	T+9m St 3 MECO
	0339?	Blok-D burn 1
	0341?	Blok-D MECO-1
	0443?	Blok-D MES-2
	0451:38	Solar orbit insertion
	1330?	Pass EL1:4
1978 Sep 13	1430?	Leave Earth sphere
1978 Sep 16	0900	TCM1 9m/s
1978 Dec 17	0350	TCM2 2.1m/s
1978 Dec 22	1520?	Enter Venus sphere
1978 Dec 25	0324:01	Venus encounter 40355 km C/A, 34303 km alt
1978 Dec 27	1500?	Leave Venus sphere
1978 Dec			320.1d 107 x 167 Mkm
1979 Feb 7		TCM3 350m/s	106.5 x 161.3 Mkm
1980 Feb		end of transmissions

1978-084C

---

The V11 lander found conditions of 90 atm, 725K.

Venera-11 SA
Date	Time	Event	Orbit
1978		Launch by Proton	KB
1978 Dec 22	1520?	Enter Venus sphere
1978 Dec 23	0220?	Separation from Venera-11, range 830000 km?
1978 Dec 25	0221:44	Entry at 125 km 11.2 km/s -18 deg	-388 x -43781
		End of aero braking
	0222:07	Lid off, pilot chute
	0222:43	Sonic relief chute (11s)
	0222:54	Sonic relief chute, upper shield jettison
	0222:54	Braking chute out
	0222:58	Lower shield off, instruments on - first telemetry
	0231:27	Braking chute sep 45 km
	0324:25	Landing at -14, 299
	0500	end of transmissions