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Coddington's Nebula - IC 2574



Scope: Celestron 9.25 Edge 235 mm at f/7, Location: DAA Observatory, Shelter Valley CA,  7 February 2019  Camera: ST8300M (Baader LRGB filters)

Exposure: Exposure:  16 x 12 min (2x2 bin) exposure with IR/UV Block filter, 10 x 4.5 min (2x2 bin) RGB exposures.

Processing: Data Collection -  Sequence Generator Pro (as FITs).  Exposure calibration, LRGB registration, and stacking (Median combine -  Winsorized Sigma Clipping) - PixInsight.  LRGB channel registration, equalization and gradient removal - PixInsight.  Curves, Levels, RGB combine, Luminance layering - PixInsight. Final finishing  - Photoshop. Annotation - Photoshop and PixInsight. RGB calibration - eXcalibrator. This image is a  RGB combine with Luminance layering.  Images processed at 3352 x 2532 resolution. Final Image size is approximately  2800 x 2100.

North is up in this image.  The central galaxy in this image is IC 2574 and is also known by it's common name - Coddington's Nebula. It is  a nearby Dwarf Galaxy; part of the M81 galaxy group and is classified classified as  SAB(s)m. There are several background galaxies  although they all seem lightly studied with little detail - none have distance estimates. Also in this image is the distant Abell Galaxy Cluster (ACO 1005). It has a distance estimated by redshift of 1.562 billion light years. As such, the galaxy members are dim and not seen easily in this image. IC 2574 has a distance estimate of 10 to 11 million light years - this range is the variation from the slightly different redshift estimate and the redshift independent estimate. These galaxies and some of the brighter stars are identified in the annotated image..   Horizontal FOV is approximately 38 arc minutes (0.81 arcsec/pix image scale on the full size image).

Image center is located approximately - Equatorial 2000: RA: 10h 28m 39s Dec: +6825'37"


All images and content remain the property of Jim Thommes - copyright 2003 - 2019

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