Trident Launch — Twilight Effect

So who else in the western states was surprised to see this glowing in the western sky a little after 02Z Saturday night?

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Sounds like the Navy announced that this was a Trident II (D5) missile test flight that was launched at sea off the southern California coast. This was seen from Flagstaff, Arizona. I think I saw a photo from as far east as Taos, New Mexico.

If I had known this was going to happen, I would have headed out to a better spot and started shooting earlier in the launch. These are amazing when they happen right after sunset looking toward the west or before sunset looking toward the east. The exhaust from the launch expands quickly once the vehicle rises above the dense, lower levels of the atmosphere. In this shot, a more concentrated stream of fuel/exhaust glows as a streak of blue-green while the missile itself continues to spew exhaust as a more white-ish fan toward the right side of the halo.
 
Mar 30, 2008
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Norman, OK
www.benholcomb.com
Neat capture! I was driving up the Pacific Coast Highway on Saturday and returning inland towards my hotel along I-5 when I saw that in the sky. I was riding passenger seat since the rental wasn't in my name and was like "stooooppppppp rocket launch!"

I was near Morro Bay, so I assumed it was just a classified launch from Vandenburg AFB.
 
"stooooppppppp rocket launch!"
Hah, I can picture that! I was thinking kind of similar when I walked out the front door to grab some junk from the car. At first I thought, Man, light pollution is terrible tonight, why is it so bad?...and why is it glowing in an exact circle?...."ahhhhhh!! rocket launch!!" Pretty much an every-second-counts scenario of trying to yank camera bag and tripod out of the trunk, run out to the middle of the street, and set up without dropping and breaking everything.
You're probably already subscribed to this, Ben, but for anyone who isn't:
http://mailman.qth.net/mailman/listinfo/launch-alert
The link will let you sign up to receive email alerts of scheduled Vandenberg AFB launches. Sometimes it'll announce White Sands launches if there might be a twilight effect. Wouldn't have helped with a classified launch from a sub like this one was, but every long once-in-a-while seems like something visible from 300 miles away pans out.