1967-060A
The backup Mars 1964 probe, Mariner C-4, was redesigned for a mission to Venus and redesignated spacecraft M67-2.
Launch of the Mariner Venus 1967 probe was carried out at 0601:00 on 1967 Jun 14 by Atlas Agena D from Cape Kennedy on azimuth 102.3 deg. Solar orbit insertion was at 0625, and the solar panels were deployed at 0630. At this point miss distance from Venus was around 75000 km. The Agena retro was fired shortly after separation to move it even farther from Venus, at around 226000 km.
A course correction was made at 2308 on Jun 19. Mariner V crossed the Venus bow shock on Oct 19, and the encounter periapsis of 4094 km was reached at 1734:56 on 1967 Oct 19, almost along the Venus velocity vector and at about 8.24 km/s relative to Venus. The probe was out of contact behind the Sun from Dec 1 until summer 1968. Attempts to contact it at that time failed until on 1968 Oct 14 signal was reacquired in its 86.76 x 109.88 million km orbit. Attempts to acquire telemetry and command the spacecraft were not successful. Last contact was at 0746 on 1968 Nov 5. On 1968 Oct 27 the craft was only 39M km from Earth; subsequent close approaches from 1969 to 1974 were between 46 and 63Mkm.
| Mariner 5 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1967 Jun 14 | 0601:00 | Launch by Atlas Agena D | CKAFS LC12 |
| 0603:09 | BECO | ||
| 0603:12 | Booster sep | ||
| 0605:57 | SECO | ||
| 0606:18 | T+5:17 VECO | ||
| 0606:20 | Fairing sep | ||
| 0606:23 | Atlas sep | ||
| 0607:22 | Agena 6933 MES-1, 2:23 | ||
| 0609:45 | Agena MECO-1 at 185 km | 88.2 181 x 194 x 29.9 | |
| 0623:01 | Agena MES-2, 1:34 | ||
| 0624:35 | Agena MECO-2 at 192.65 km 11.40 km/s | ||
| 0627:16 | Agena sep | ||
| 0630:11 | Solar panel deploy; miss distance 75000 km | ||
| Agena yaw | |||
| 0632:16 | Agena posigrade burn (after yaw) | ||
| 1967 Jun 19 | 2308:03 | TCM 17s 15.4m/s | |
| 1967 Oct 19 | 1458 | E-156 min Venus bow shock | |
| 1732 | E-2 min Earth occultation | ||
| 1734:56 | Venus flyby 4094 km (C/A 10151 km) | ||
| 1738:51 | E+3.55min Sun-Venus-M5 quadrature | ||
| 1752 | E+18min bow shock | ||
| 1967 Dec 1 | End primary mission | ||
| 1967 Dec 4 | 2000 | LOS, behind Sun | |
| 1968 Oct 14 | AOS | ||
| 1968 Oct 27 | pass 39.0Mkm from Earth | ||
| 1968 Nov 5 | 0746 | End of tx | |
| 1975 Oct | Pass 4.3Mkm from Venus | ||
Payload:
- UV photometer 1250-2200,1350-2200,1050-2200 (Galactic UV and Venus Ly Alpha) (Colorado/Barth)
- S-band occultation (JPL)
- Dual freq Radio propagation experiemnt, 423.3 MHz and 49.8 MHz, to measure electron density along LOS. (Stanford/Eshleman)
- Solar plasma probe, protons 45 eV-9.4 keV, density, velocity and temp. (MIT/Bridge)
- Low field vector He magnetometer (JPL/Smith)
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