Swan Nebula M17, also called the Omega Nebula, the Horseshoe Nebula, or
(especially in the southern hemisphere) the Lobster Nebula, is a region
of star formation and shines by excited emission caused by the higher
energy radiation of young stars. This is one of my favorite objects to view in the
late summer southern sky with my 20" Obsession along with an OIII
filter inserted in my filter slide (made by Kurt Maurer). This
image has been cropped slightly for framing.
Date & Location: September 20th 2006, Santa Fe, Texas.
Scope: Obsession 20” f/5 on a Tom Osypowski Dual Axis Equatorial Platform, Orion 100mm f/6 Guidescope.
Autoguider: SC1 Mod Celestron Neximage Cam, Shoestring GPINT-PT guide port
interface adapter, and Guidemaster software
Camera: Canon 20D DSLR (non-modded), homemade serial control shutter release cable and DSLR shutter from Stark Labs.
Filters: IDAS LPR Filter
Conditions: Temp 73F, Humidity 68%, Winds Calm, Transparency 6/10, Seeing 7/10.
Exposures: 32 x 60sec @ 1600 ISO Sub Frames, 15 x 60sec Darks.
3504x2336 Raw files converted to Lossless 16-bit FITS, calibrated,
aligned, and combined with ImagePlus software. Slight wavelet filtering with Registax 3.Final processing PhotoImpact Pro.