Click the arrow to watch the Orbital OA-6 pre-launch briefing. Video source: NASA YouTube channel.
Click the arrow to watch the science briefing for the OA-6 mission. Video source: NASA YouTube channel.
United Launch Alliance is scheduled to launch its Atlas V tonight at 11:05 PM EDT with the Orbital ATK Cygnus commercial cargo ship to the International Space Station.
As of this writing, the weather forecast is 90% favorable, although other factors can always intrude.
This is scheduled to be the last Cygnus launch on Atlas. Orbital will return to its Wallops, Virginia home base to launch the next Cygnus mission to the ISS.