NASA orbiter Endeavour is squeezing her way through tree-stripped streets of Los Angeles this weekend, en route to a permanent retirement home at the California Science Center.

Here's a Google Map of the route, with stopping points. Big shuttle is big. Bigger than the streets that must accommodate her. Basically, the whole thing is like the ultimate slow-speed car chase, but with fewer live news choppers overhead.

Above: BB reader Troy B. Asher caught Endeavour parked in a parking lot today. More of his pix here.

Endeavour as she moved past the shops, not sure if the crew stopped for a massage twitter.com/CNNkimsegal/st…

— Kim Segal CNN Miami (@CNNkimsegal) October 12, 2012

If you're in California today, Friday, Sept. 21, you may have a chance to see space shuttle Endeavour's historic flyover of the state as it heads for the California Science Center in Los Angeles for retirement. Here are more details from NASA Dryden on the exact route and planned times.

The orbiter, atop its 747 Shuttle Carrier Aircraft (SCA), is scheduled to fly over northern California and a large area of the Los Angeles basin beginning at about 8:15 a.m. PDT. NASA originally planned the transit for an earlier hour, but rescheduled to increase the odds of good visibility for Bay Area residents—fog is a factor there in the early morning.

"During the four-and-a-half hour flight, social media users are encouraged to share their Endeavour sightings using the hashtags #spottheshuttle and #OV105, Endeavour's vehicle designation," according to NASA, and there's a Flickr group for space fans. The official account for NASA is here. At 11 a.m. EDT (8 a.m. PDT), NASA TV will air Endeavour's departure for the flyover.

NASA Ames' Twitter account is a good one to follow today, as is Boing Boing pal Todd Lappin, who shot the gorgeous photos in this post. SpaceFlightNow is liveblogging, and they're also great to follow on Twitter today.

Snip from the NASA press release:

The SCA and Endeavour will salute NASA's Dryden Flight Research Center and the Edwards Air Force Base area after takeoff with a low flyby northbound to Sacramento and the San Francisco Bay Area.

Any time after 9:30 a.m. PDT, watch for Endeavour from viewing locations that include the Bay Area Discovery Museum, Chabot Space and Science Center, the California State Capitol, Exploratorium, Lawrence Hall of Science and Monterey Bay Aquarium.

Next the aircraft will travel south, making a pass over NASA's Ames Research Center and Vandenberg Air Force Base before heading into the Los Angeles area.

Any time after 11:30 a.m., watch for flyovers of Endeavour passing regional landmarks such as its future home at the California Science Center, Columbia Memorial Space Center in Downey, Disneyland, The Getty Center, Griffith Observatory, Los Angeles City Hall, the Long Beach Aquarium of the Pacific, Malibu Beach, NASA's Jet Propulsion Laboratory in Pasadena, the Queen Mary, Universal Studios and Venice Beach, among others.

Finally, the SCA and Endeavour will land about 12:45 p.m., at Los Angeles International Airport (LAX) for an arrival ceremony before Endeavour is taken off the 747. The orbiter will be transported to the California Science Center next month.

The exact timing and path of the ferry flight will depend on weather conditions and operational constraints. Some planned flyovers or stopovers could be delayed or canceled.