Venera 9

  1975-050A

---

The first V-75 probe, 4V-1 No. 660, was launched on 1975 Jun 8 as Venera-9. It used the 4M type orbital bus with a lander of a new design. The orbiter was OA No. 660 and the lander was SA No. 660. The upper stage was a Blok D-1, 11S824M No. 10326501L.

Prior to first TCM closest approach was calculated as Oct 22 0215, with a 30000 km miss distance.

Venera-9
Date	Time	Event	Orbit
1975 Jun 8	0238	Launch by Proton-K	KB
	0240	Stage 1 sep
	0243	Stage 2 sep
	0247	Stage 3 MECO
	0247	Stage 3 sep
	0251?	Blok D MES-1
	0253?	MECO-1	179 x 437 x 51.37
	0404?	MES-2 8:37?
	0412:00	MECO-2
1975 Jun 16	1130:03	TCM 11.93m/s
1975 Oct 15	0259:24	TCM-2 13.4m/s
1975 Oct 20	1605	SA separated
		TCM 0.247 km/s
1975 Oct 22	0851	VOI 0.923 km/s, Venus orbit	1500 x 111700 x 34
		TCM	1300 x 112200 x 34.1
1975 Oct 26		Venus bow shock
1975 Nov 1		Venus bow shock
1975 Nov 11		Venus bow shock
1976 Jun 21		End of transmissions

Payload:

• Bistatic radar

• IR radiometer

• IR spectrometer

• UV photometer

• Ion spectrometer

1975-050D

---

The Venera-9 SA landed at 290 50 longitude, 31 42 N. The temperature was 455 C, and the pressure was 85 bar. Entry was 10.7 km/s at 20.5 deg, altitude 125 km.

Venera-9 SA
Date	Time	Event	Orbit
1975 Jun 8		Launch by Proton-K	KB
1975 Oct 18	1700?	Enter Venus gravisphere
1975 Oct 20	1605	Sep from Venera-9
1975 Oct 22	0353:50	Entry (0358 ERT) at -21 deg?
1975 Oct 22	0508:23	Landed (0513:07 ERT)
1975 Oct 22	0601	End of transmissions after 53 min

Payload:

• Cameras

• Densimeter

• Gamma ray spectrometer

• Anenometer