1975-057A
Orbiting Solar Observatory 8 was a new type of OSO satellite. It was built by Hughes (and designated by them the HS-331 type satellite). OSO 8 was launched at 1143 on 1975 Jun 21 by a Delta 1910 from Cape Canaveral. The Delta second stage separated at 1218 leaving OSO 8 in a 95.5 min, 544 x 560 km x 32.9 deg orbit. OSO 8 transmitted until 1978 Sep 30. It reentered on 1986 Jul 9, the final recorded orbit being 153 x 161 km x 32.9 deg.
| OSO 8 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1975 Jun 21 | 1143:00 | Launch by Delta 1910 | |
| SRM sep | |||
| 1147:28 | T+4:28 MECO | ||
| T+4:36 Stage 1 sep | |||
| 1147:41 | T+4:41 SES-1 4:59 | ||
| 1152:40 | T+9:40 SECO-1 367 km 7.649 km/s | 270? x 555 | |
| 1208:46 | T+25:46 SES-2 7s 483 km 7.499 km/s | ||
| 1208:53 | SECO-2 | ||
| 1216:22 | OSO inertia booms deploy | ||
| 1217:22? | Spinup stage 2 | ||
| 1218 | St 2 sep | 95.5 544 x 560 x 32.9 | |
| 1978 Sep 30 | end of tx | ||
| 1986 Jul 9 | Reentered | ||
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