The "bubble" is an emission nebula created by the stellar wind from a massive hot, 8.7 magnitude young central star (SAO 20575). It is 11,000 light years away in the constellation of Cassiopeia.
The image below is a wide field image that has the M52 Open Cluster in the upper left, and the Bubble in the lower right.
The image above was taken with the ST-8E camera at f/5 on the FSQ 106N and AP900 from Mistletoe Observatory in Monmouth Oregon Sept 6, 2008. It is an RGB composite (as detailed below) with a total exposure time of 90 min. Calibration and alignment were done in MaxIm DL. Final processing was done with Photoshop. This data was collected "hands free" with an automation script. I basically set up the shot, and then went to bed. Focusing was done every 30 min. Calibration frames were taken at the end. And the observatory was put to bed and shut down automatically.
|Red||30 min||30 x 1 min||1x1|
|Green||20 min||20 x 1 min||1x1|
|Blue||40 min||40 x 1 min||1x1|
Previous attempt. Taken Sept 25, 2000 from my backyard in Monmouth Oregon.
12" LX200 at f/6.3 and SBIG ST-8E.
This image is a composite of thirty 30 sec luminance, fifteen 1 minute red, fifteen 1 minute green, and thirty 1 min blue frames. I used a 10th magnitude guide star south of the bubble with 4 second exposures. The color frames were binned 2x2. It was color balanced to 1.15 : 1.00 : 2.05. Adobe Photoshop was used to remove blooming spikes.
Previous best from one year earlier:
This image is the combination of 21 one minute exposures taken with the 12" LX200 and 416XT CCD at f/3.3. It was taken in my back yard in Monmouth Oregon on Sept 3, 1999.