Perseid meteor shower 2010 over Mount Hood, Oregon

Posted by Rowdey
on Wednesday, August 25, 2010
by Gary Randall

This shot was made by setting up my camera on a tripod and programming my cable release to take 360 - 30 second exposures, which is 3 hours of time lapse. After which I downloaded all of the photos and separated each shot that had a meteor. I eliminated airplane trails and iridium flares. I then combined them all into layers over another 30 second exposure of Mount Hood, the lake and the sky that was taken that night. I then went about the painstaking task of masking out each meteor so the background would show through the layer.

Once I have separated each meteor I returned to the beginning and located the axis of rotation at the North Star and then went about rotating each layer using a galaxy, Andromeda (?), as a reference point of location to align their common point of origin without the affect of the rotation of the Earth.

After I had each meteor coming from the proper point of origin I merged them into one transparent layer and brightened them up and merged that layer down onto the bottom layer.

And this is the result. I've been working on this off and on for a week now trying to get it right.

The photos were taken 8/13/10 between 12:30am - 3:30am.

Camera - Nikon D90
Exposure - 30
Aperture - f/2.8
Focal Length - 11 mm
ISO Speed - 1600

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