Instrument

Takahashi FSQ-106ED @ f/5.0 (530 mm F.L.)  Captured at 3.5 arcsec/pixel.  Shown resampled to 8.4 arcsec/pixel.

Mount

Paramount ME

Camera

SBIG STL-11000 w/ internal filter wheel, AstroDon 6nm Filters

Acquisition Data

1/17/2009 to 2/19/2009 Chino Valley... with CCDAutoPilot3

Exposure

SII    600 min. (20 x 30 min. bin 1x1)

Hα    480 min.  (16 x 30 min. bin 1x1)
OIII  420 min.  (14 x 30 min. bin 1x1)

SII,Ha & OIII are mapped to RGB respectively

Click here for a natural color image.
Click here for an Hα B&W image

Software

CCDSoft, CCDStack, Photoshop CS w/ the Fits Liberator plugin, Noel Carboni's actions and Russell Croman's GradientXTerminator

CCDStack to calibrate, register, normalize, data reject & combine.

PhotoShop for color combine and non-linear stretching.

North is to the top.

IC 443, the Jellyfish Nebula, is a Galactic supernova remnant, in the constellation Gemini, that occurred 8,000 years ago. It is one of the best studied cases of supernova remnants, interacting with surrounding molecular clouds. IC 443 spans about 65 light-years at an estimated distance of 5,000 light-years.