1984-128A
Vega-2 (Venera-Galley 2, 5VK No. 902) was launched on 1984 Dec 21.
| Vega-2 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1984 Dec 21 | 0913:52 | Launch by Proton | KB |
| 0923? | Stage 3 MECO | ||
| 0927? | 11S824M burn 1 | ||
| 0929? | 11S824M MECO1 | ||
| 1027? | 11S824M burn 2 | ||
| 1031 | Asc node | ||
| 1035? | 11S824M MECO2 | Solar orbit | |
| 1035? | 11S824M sep | ||
| 1947? | Pass EL1:4 | ||
| 1984 Dec 26 | 1730? | Pass L1 | |
| 1985 Jan? | TCM-1 | ||
| 1985 Jun ? | TCM-2 | ||
| 1985 Jun 11 | 2200? | Enter Venus sphere | |
| 1985 Jun 14 | Venus encounter, 24500 km | ||
| 1985 Jun 18 | 0815? | Leave Venus sphere | |
| 1986 Mar 9 | 0720:06 | Halley encounter, 8036 km at 0.8341 AU from Sun | |
| 1987 | Decommissioned | ||
1984-128E
The Vega-2 Spuskaemiy Apparat landed on Venus on 1985 Jun 15. Landing site was 6 27 S, 181 05E, at 2.6 km below mean 6050 km radius. (other sources give 8.5S 164.5E (NSSDC);27 0S 181 05 (unk); 7.2S 179.4E (KI25-643)). Conditions were 90 atm, 729K.
| Vega-2 SA | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1984 Dec | Launch by Proton | KB | |
| 1985 Jun 13 | Sep from Vega-2 | ||
| 1985 Jun 15 | 0159:30 | Entry, 10.80 km/s 19.08 deg 125 km | -480 x -68300 |
| 93 km begin science data | |||
| 0200:05 | Drogue para deploy 65 km 280 m/s | ||
| Begin 64 min descent | |||
| 0200:16 | E+1 min Heat shield upper half sep, 64 km 160 m/s | ||
| 0200:16 | Balloon sep and parachute, (w upper half) 57 km 30m/s | ||
| 0200:16 | Deploy main chute 64.5 km | ||
| 0200:20 | Lower half shell sep 63 km, 100 m/s | ||
| 0209:15 | Main chute release 47 km 20 m/s | ||
| 0300:50 | Landed on Venus | ||
| 0322 | End of transmission, 21 min | ||
1984-128F
The 3-m balloon was deployed at an altitude of 55 km from the Vega-2 SA and transmitted for 46 hr.
| Vega-2 AZ | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1985 Jun 14 | Sep from Vega-2 SA | ||
| 1985 Jun 15 | 0200:16 | E+1 min Heat shield upper half sep, 64 km 160 m/s | |
| 0200:38 | Balloon sep 62 km | ||
| 0200:46 | Balloon drogue parachute, 57 km 30m/s | ||
| 0203:16 | Balloon main para | ||
| 0206:04 | Input at 179.8E 7.5S | ||
| 0206:16 | Toroidal lower half sep | ||
| 0206:36 | Fill balloon envelope 55 km 8m/s | ||
| 0210:26 | Parachute and filling system sep 53 km, 5m/s | ||
| 0211? | Ballast release H=50 km | ||
| 0215? | Begin drift after 15 min, 54 km | ||
| 1985 Jun 16 | 0910 | Terminator passage at 111.0E 7.5S, 7400 km range | |
| 1985 Jun 17 | 0038:01 | End of transmissions, 76.3E 7.5S, 11100 km range | |
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