/r/OrbitalATK
Orbital ATK's ninth Cygnus mission under the Commercial Resupply Services contract is scheduled to lift off from the Mid-Atlantic Regional Spaceport at 08:44 UTC (4:44 AM EDT) on Monday, 21 May. The S.S. J.R. Thompson Cygnus spacecraft is carrying 3,350 kg (7,385 lb) of supplies to the International Space Station as well as six cubesats in an external NanoRacks deployer. If Monday's launch attempt is successful, Cygnus is scheduled to arrive at the ISS on Thursday, 24 May.
#Updates:
Date/Time (UTC) | Info |
---|---|
15 Mar | The OA-9E Cygnus service module departed Dulles, VA on its way to Wallops. |
11 May | Cygnus was mated to its Antares launch vehicle. |
15 May | Late-load cargo was packed inside Cygnus. |
16 May | The S.S. J.R. Thompson Cygnus was encapsulated ahead of Sunday morning's launch. |
18 May, 00:55 | Antares has begun rolling to Pad 0A at the Mid-Atlantic Regional Spaceport. |
13:25 | The OA-9 launch has been delayed to to NET 21 May, 08:39 UTC (4:39 AM EDT) to allow for additional pre-launch inspections and more favorable weather. Monday's forecast shows an 80% chance of acceptable weather. |
19 May, 00:28 | Antares is being erected at Pad 0A. |
20 May | There's a 65% chance of acceptable launch weather tomorrow morning. |
21 May, 03:49 | The weather forecast has improved to 75% GO. |
06:49 | The countdown has entered a planned twenty-minute hold. |
06:57 | All stations are GO to begin fueling. |
06:58 | The countdown has resumed. |
07:04 | RP-1 is now being loaded into Antares' first stage. |
07:34 | LOX loading has now begun. |
08:00 | NASA TV coverage is live now! |
08:14 | Liftoff is now targeting 08:44 UTC (4:44 AM EDT) to allow the weather to clear. |
08:19 | T-10 minutes and holding. This is a planned, fifteen-minute hold. |
08:32 | All stations are GO to resume the countdown at T-10 minutes. |
08:34 | T-10 minutes and counting. |
T-0:00:00 | Antares' two RD-181 engines have begun their ignition sequence. |
T+0:00:04 | Liftoff! Go Antares! Go Cygnus! |
T+0:03:35 | MECO. Antares' first stage has shut down. |
T+0:03:41 | Stage separation confirmed. |
T+0:04:11 | The payload fairing has been jettisoned. |
T+0:04:16 | The interstage has now been jettisoned. |
T+0:04:24 | Ignition! Antares' Castor-30XL second stage has ignited for a burn that will last about two-and-a-half minutes. |
T+0:07:06 | Stage two burnout. Standby for Cygnus separation in about two minutes. |
T+0:09:06 | Cygnus separation confirmed! |
10:38 | Cygnus has fully deployed both solar arrays. |
#Information and Resources:
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