The long-awaited flyby of the massive asteroid 2012 DA14 on Friday morning won't be visible overhead in California, due to bright sunlight.

But commentary, real-time imagery and a telescopic view of the asteroid can all be seen by computer.

A half-hour commentary broadcast from NASA's Jet Propulsion Laboratory in Pasadena will be available online starting at 11 a.m. PST via NASA TV and streamed live online at http://www.nasa.gov/ntv and http://www.ustream.tv/nasajpl2.

Near real-time imagery of the asteroid's flyby before and after its closest approach -- made available to NASA by astronomers in the dark skies of Australia and Europe, weather permitting -- will be streamed beginning about 9 a.m. PST and continuing through the afternoon at this website: http://www.ustream.tv/nasajpl2.

A Ustream feed of the flyby from a telescope at NASA's Marshall Space Flight Center in Huntsville, Ala., will be streamed for three hours starting at 6 p.m. PST. To view the feed and ask researchers questions about the flyby via Twitter, visit: http://www.ustream.tv/channel/nasa-msfc.

It will be the nearest recorded brush with a such a large space rock, which is estimated to be the size of a 15-story office building.

Satellite operators are monitoring the asteroid but it is expected to miss the belt of satellites that are 23,000 miles up.

There is no chance of impact with Earth -- at its closest, it will pass about 17,000 miles above us.

Contact Lisa M. Krieger at 650-492-4098.