Ring Nebula, M57
The Ring Nebula is in the constellation of Lyra, about 6 1/2 degrees southeast of the bright star Vega.

About 20,000 years ago, a toroidal (doughnut-shaped) cloud of gas was expelled from a dying star. Today that torus is 0.4 light-years in diameter and still expanding. Its apparent diameter is 76 arc-seconds today and is increasing at a rate of about one arc-second per century.

This image was taken from our back yard in Kenmore around 10:00 pm on September 29, 2001.

848 mm focal length, f/8
Separate exposures taken for red (10 sec), green (15 sec) and blue (30 sec)
Sidereal tracking but no auto-guiding