2015-072A
The Cygnus OA-4 mission (the first Cygnus flight under the merged Orbital ATK) was the first flight with the Enhanced PCM and a service module with the ATK-Goleta circular UltraFlex arrays. Spacecraft is 6.4m long 3.0m dia. Mass is 7492 kg at launch. Cargo is 3349 kg; 3513 kg with packaging. It flew on AV-061 while Antares 230 remained under development. The PCM and SM were integrated at KSC.
OA-4 was berthed at the newly available Unity nadir port. At undocking mass was 7306 kg.
| Cygnus OA-4 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 2015 Dec 6 | 2144:57 | Launch by Atlas AV-061 | CC SLC41 |
| T+4:15 BECO | |||
| T+4:21 Booster sep | |||
| T+4:31 Centaur MES1 | |||
| T+4:39 Fairing sep | |||
| 2203:13 | T+18:16 MECO-1 | ||
| 2206:02 | T+21:05 Cygnus sep | 234 x 237 x 51.7 | |
| 2232 | T+48:00 Centaur deorbit, 10s | ||
| 2248? | Entry | ||
| Impact S of Australia | |||
| 2015 Dec 8 | 92.80 404 x 418 x 51.7 | ||
| 2015 Dec 9 | 92.63 397x 408 x 51.6 | ||
| 1119:43 | Grappled by SSRMS | ||
| 1426 | Berthed on Unity | ||
| 2016 Jan 15 | Cargo transfer to ISS continues | ||
| 2016 Feb 19 | 1034 | CBM demate | |
| 1036:57 | Unberth | ||
| 1226:39 | SSRMS release | ||
| 1232? | Sep burn | ||
| 2016 Feb 20 | 1032 | DDV-1 burn | |
| 1509 | Deorbit 58.3 m/s | ||
| 1553 | Entry over S Pacific | ||
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