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IC 1805 in Cassiopeia



Scope: Zenithstar 66mm APO Refractor at  f/4.5, Location: Dos Picos Park, Ramona, CA,   12 November 2010  Camera: ST8300M

Exposure:  12 x 9 min and 5 x 13 min H-Alpha Exposure (1x1),   8 x 3 min RGB exposures (2x2).

Processing: Images were captured with CCDSoft. Aligned/stacked and dark subtracted in Astroart ; Sigma Combine method was used for stacking subs.  Central gradient was removed in Astroart. All channels were scaled and equalized in Astroart.  Channels were co-registered in Astroart. G2V  factors  were applied to color channels in Astroart.  The 9 minute  and 13 minute H-Alpha exposures were used  for the main luminance construction in proportion to their total time. Level and curves adjustments were made to bring out object features. Some Levels and Curves were selectively applied excluding the brighter areas.  LRGB combine was done in Photoshop.   Sharpening was done on the luminance channel. Final touches and color balance tweaks in Photoshop. Final Image size is approximately 3352x2532 (resized to 2400x1813).

North is up in this image. The larger IC 1805 region is commonly known as the "Heart Nebula" due to it's distinctive shape. The brighter area in the upper right is NGC 896 / IC 1795 region. The Star Cluster on the left is NGC 1027. This image replaces an earlier image that can be seen in the Archives here.  Horizontal FOV is  208 arc minutes.

Image center is approximately - Equatorial 2000: RA: 02h 34m 01s Dec: +6123'45"


All images and content remain the property of Jim Thommes - copyright 2003 - 2012

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