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IC 1985 - Barnard 3 and 4 in Perseus



Scope: FSQ-106N refractor at f/5, Location: Laguna Mountains, CA  18 October 2014  Camera: Atik 383L

Exposure: 12 x 9 min  (1x1 bin) exposures with UV/IR block, 8 x 9 min (2x2 bin) H-Alpha exposures, 8 x 2.5 min (2x2 bin) RGB exposures.

Processing: Data Collection -  Artemis Capture (as FITs).  Calibrated, stacked (Kappa Sigma Combine) - Deep Sky Stacker. LRGB channel registration, equalization, and central gradient removal - Astroart.  Curves, Levels, RGB combine - ImagesPlus. Luminance Layering, final stretch, and finishing  - Photoshop. This image is a  LHa- RHaGB combine with Luminance layering.  Color saturation in LAB color; H-Alpha and Luminance exposure stacks were used for the luminance layer.   Processing was in up-sampled  data (to simulate 1x1 bin). Final Image size is approximately 2600 x 1950.

North is up in this image. IC 1985 is a cluster with Nebulosity in the constellation of Perseus. The core of the cluster is in the upper left portion of this image. Also in this image is Barnard 3 and 4 across the middle of the image. The H-Alpha data reveals the faint emission of LBN 749. Because of the Ha blend in the Red channel , LBN 749 appears red though it is more of a neutral color - alternate image without H-Alpha data. The bright star is Omicron Persei. There is a duplicate entry in the IC catalog for this cluster - it is also known as IC 348. The annotated image shows these objects (and more). IC 1985 is a young star forming region whose age is estimated at about 2 million years. IC 1985 is about 1,000 light years distant from Earth.  Horizontal FOV is 120'


Image center is approximately - Equatorial 2000: RA: 03h 41m 22s Dec: +3154'34"


All images and content remain the property of Jim Thommes - copyright 2003 - 2014

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