Tracking the space shuttle Endeavour as it makes its scheduled farewell flight through the Bay Area on Friday is something of an endeavor itself. Weather and logistical issues could throw the shuttle and the Boeing 747 that is ferrying it off schedule.

Not to fear: the NASA Ames Twitter stream, @NASAAmes, will provide regular updates of the shuttle's progress and report any major changes to the Endeavour's schedule. They are using the hashtags #spottheshuttle and #OV105, which is the shuttle's orbiter vehicle designation, to distinguish tweets about the shuttle. And they've asked those who spot the shuttle on Friday to use the same hashtags when they tweet photos of Endeavour.

You can also find the NASA Ames Twitter feed on NASA Ames home page at http://www.nasa.gov/centers/ames/home/index.html.

One of the best places to see the shuttle in the Bay Area will be Moffett Field, which is opening its gates to the public at 6 a.m. on Friday. NASA Ames officials have asked that visitors go online and print out a parking pass, which will help them anticipate the size of the crowd planning to attend.

Contact Mike Cassidy at mcassidy@mercurynews.com or 408-920-5536. Follow him at Twitter.com/mikecassidy.