Coddington's Nebula - IC 2574
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CLICK
ON IMAGE FOR FULL SIZE VIEW
(2800x2100)
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: +68°25'37"
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