Orbital ATK's Antares rocket launched crew supplies and science experiments on board the Cygnus spacecraft. The rocket lifted off from the Mid-Atlantic Regional Spaceport at Wallops Island Flight Facility in Virginia.

The launch date was Monday, May 21, 2018 at 8:44 AM (UTC).

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Provider	Orbital ATK
Vehicle	Antares
Location	Pad 0A Mid-Atlantic Regional Spaceport (Wallops Island) Virginia, United States
All dates and times should be submitted in UTC timezone. Use Estimated Date if you don't know the official launch date and time; otherwise, use Window Opens/Closes and/or Planned T-0, which will override the Estimated Date.
— Estimated Date —
Date
— Window Opens —
Date
Time
Launch Date	Monday, May 21, 2018
Launch Time	8:44 AM (UTC)
Launch Time (Pad)
— Planned T-0 —
Date	Monday, May 21, 2018
Time	8:44 AM (UTC)
— Window Closes —
Date	Monday, May 21, 2018
Time	8:44 AM (UTC)
COSPAR ID	2018-046

Cygnus CRS-OA9E (Wikipedia)

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Orbital ATK OA-9 Mission Broadcast Replay (NASA)

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CRS OA-9E (Cygnus)

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