1967-041A
LO spacecraft 7 was launched at 1926 on 1967 May 4 by Atlas Agena D from Cape Kennedy. Lunar orbit insertion, at 1517 on May 8, was into a 2700 x 6000 km x 85.5 deg orbit for global lunar mapping, since the first three missions had completed the basic Apollo requirements. The photo mission was mostly successful despite problems with a stuck thermal cover and with the readout system. The spacecraft was modified for better thermal protection in the high operational orbit.
Orbit adjustments were made at 2316 on Jun 5 and 2230 on Jun 8 to lower the orbit to 77 x 3943 km, to aid in trajectory planning for the final mission. Contact with Lunar Orbiter IV was lost on 1967 Jul 17 and the probe is calculated to have impacted the lunar far side some months later.
| Lunar Orbiter IV | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1967 May 4 | 2225:00 | Launch by Atlas Agena D | CK LC13 |
| 2227:08 | T+2:08 BECO | ||
| 2227:12 | T+2:12 Booster jettison | ||
| 2229:49 | T+4:49 SECO | ||
| 2230:10 | T+5:10 VECO | -4091 x 181 x 29.74 | |
| 2230:13 | T+5:13 Fairing | ||
| 2230:15 | T+5:15 Atlas 5804 sep | ||
| 2231:06 | T+6:06 Agena 6633 burn 1, 152s | ||
| 2233:38 | T+8:38 Agena MECO | 160 x 160 x 29.7? | |
| 2254:21 | T+29:21 Agena burn 2 | ||
| 2255:49 | T+30:49 Agena MECO | ||
| 2258:35 | T+33:35 Agena sep | ||
| 2316 | 191 x 416471 x 29.9 | ||
| 1967 May 5 | 1645 | TCM 60.9m/s 52s | |
| 334 x 435516 x 22.7 | |||
| 1967 May 8 | 1508:46 | LOI burn 659.6m/s 501.9s burn | |
| 1517:08 | LOI MECO | 721.0 2706 x 6111 x 85.48 | |
| 1967 May 11 | 1546 | Photo survey begins | |
| 1967 May 26 | Photos complete | ||
| 1967 Jun 1 | Readout complete | ||
| 1967 Jun 5 | 2316:16 | TCM 186.7m/s 117.9s | 74 x 6084 x 85.5 |
| 1967 Jun 8 | 2239:27 | TCM 70.5m/s 42.8s | 77 x 3943 x 85.5 |
| 1967 Jul 17 | Last contact | ||
