WASHINGTON — NASA invites its Twitter followers to a special Tweetup with Sandy Magnus and Chris Ferguson at 4 p.m. EDT on Thursday, Oct. 13. The event will be in the James E. Webb Memorial Auditorium at NASA Headquarters, 300 E St. SW, Washington.

Commander Chris Ferguson, Pilot Doug Hurley, Mission Specialists Sandra Magnus and Rex Walheim were the crew of the space shuttle Atlantis for the 13-day STS-135 mission. Atlantis launched July 8 and landed July 21, completing NASA’s final space shuttle mission, after a journey of more than five million miles.

The crew delivered more than 9,400 pounds of spare parts, equipment and other supplies in the Raffaello multi-purpose logistics module — including 2,677 pounds of food — that will sustain space station operations for the next year.

The 21-foot long, 15-foot diameter Raffaello brought back nearly 5,700 pounds of unneeded materials from the station. STS-135 was the 135th and final shuttle flight.

A Tweetup is an informal meeting of people who use the social messaging medium Twitter. This NASA Tweetup is an opportunity to meet and speak with STS-135 crew members, the people behind NASA’s Twitter account and other space-exploration-minded participants.

Registration for the event is open from 10 a.m. EDT, Thursday, Sept. 29, until 5 p.m. on Friday, Sept. 30. NASA randomly will select 150 participants from online registrants. For more NASA Tweetup information and to sign up, visit: http://www.nasa.gov/tweetup

To connect with NASA on Twitter and other social networking sites, visit: http://www.nasa.gov/connect

All four of Atlantis’ crew members are posting updates to Twitter. You can follow Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandy Magnus and Rex Walheim at:

http://www.twitter.com/Astro_Ferg

http://www.twitter.com/Astro_Doug

http://www.twitter.com/Astro_Sandy

http://www.twitter.com/Astro_Rex

For more information about shuttle Atlantis’ STS-135 mission, visit: http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135