The unmanned rocket is scheduled to lift off at 5 p.m.,with the launch window extending until 8 p.m.
The big wild card for hopeful skywatchers is the weather. NASA says the chance of launch is just 45 percent due to the possibility of low clouds and showers.
If it’s determined the mission is a go, look east and the rocket will be viewable about 10 degrees above the horizon in the Washington area.
The rocket is 133-feet tall, the largest ever launched from Wallops Island, CBS News reports.
Designed “to provide responsive, low-cost, and reliable access to space“, the Antares rocket is being launched as part of an Orbital Sciences test mission with the goal of transporting cargo to the International Space Station (ISS). No delivery to the ISS will be made on this mission but, in a second test mission planned for June, the rocket will eject a capsule – named Cygnus – that will hook up with the ISS.
“It will demonstrate the ability of Cygnus to rendezvous and berth with ISS and then destructively reenter Earth’s atmosphere,” NASA says.
Watch: Animation of the launch, flight, and capture of an Orbital Sciences Cygnus capsule on a demonstration mission to the International Space Station
Assuming this second demonstration is successful, Orbital Sciences is contracted by NASA to complete eight cargo delivery missions to the ISS – the first tentatively scheduled for September.
Additional viewing information
* Launch status is available by phone by calling 757-824-2050.
* The launch will be broadcast on NASA TV.
* For those living in or visiting the local area, there are two primary viewing locations for Wallops launches: (1) The Wallops Visitors Center located along Virginia Highway 175. Visitors are advised to arrive early as parking is limited. More info: http://sites.wff.nasa.gov/wvc/. (2) The beach on Assateague Island (Virginia-side). Capacity is based on a number of conditions, such as time of year and state of the beach. More info: http://www.fws.gov/northeast/chinco/. Finally, visitors to the area may also inquire with local tourism officials on alternate viewing locations as well as any local business events tied into Wallops launch operations.
* Information on upcoming missions and updates during launch countdowns are available in the Wallops area on radio station 760 AM.