1964-074A
The S-055C micrometeoroid satellite carried a new set of detection devices. Launched at 1202 on 1964 Nov 6 by Scout X-4 from Wallops, it entered a 99.2 min, 466 x 977 km x 52.0 deg orbit at 1211. It transmitted until 1966 Jul and reentered over 11N, 175E on 1983 Jun 28.
The satellite remained attached to the X258C1 motor, and the pressurized cell detectors were wrapped around the motor, with the remainder of the detectors on the spacecraft itself. It was 0.58m dia 2.33m long (1.48m motor and 0.85m spacecraft). Mass was 38 kg empty motor plus 96 kg satellite.
Launch supported the San Marco training program, so was probably from the Mk 2 Launcher.
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| Explorer 23 |
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| Date | Time | Event | Orbit |
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| 1964 Nov 6 | 1202:01 | Launch by Scout | WI |
| | | T+1:18 Stage 1 burnout |
| | | T+1:23 Stage 2 burn, Stage 1 sep |
| | | T+2:10 Stage 2 burnout, apogee 185 km |
| | | T+2:22 Stage 3 burn |
| | | T+2:55 Stage 3 burnout |
| | | Stage 3 apogee 550? km |
| | 1210:45 | T+8:48 Spinup |
| | 1210:50 | St 4 burn |
| | 1211:15 | T+9:12 St 4 burnout | 99.2 466 x 977 x 52.0 |
| | | Spin 150 rpm |
| 1964 Nov 20 | | Tracking beacon off |
| 1966 Jul | | End of ops |
| 1983 Jun 28 | | Reentered |
Payload:
- Pressurized cells (LaRC/Gurtler)
- Impact detectors (LaRC/Beswick)
- CdS cells (GSFC/Secretan)
- Capacitor detectors (LaRC/Sivitor)