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