NGC 5068 in Virgo
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CLICK ON IMAGE FOR FULL SIZE VIEW (3668x2498) Scope: Celestron 9.25 Edge HD 235 mm at f/7, Location: DAA Observatory, Shelter Valley, CA, 5 and 13 May 2021 Camera: ASI294MM (Baader LRGB Filters) Exposure:
Exposure: L - 64 x 4 minutes (gain-121 2x2) , RGB - 20 x 3 min each filter
(gain-121 2x2).
Processing: Data
Collection - Sequence Generator Pro (as FITs). Sub-frame calibration
- Pixinsight. Sub-frame registration and integration (Average combine - Winsorized Sigma
Clipping) - PixInsight. Mure Denoise - PixInsight. Non-linear stretching, normalization and
gradient removal - PixInsight. Curves, Levels, Local Histogram
Normalization, RGB combine, Luminance
layering - PixInsight. Final finishing - Affinity Photo.
Photometric RGB calibration
- PixInsight. Annotation - PixInsight, Aladin (Simbad and NED), and Affinity
Photo. This image is a LRGB with luminance layering. Image processed at 4144x2822 resolution. Final
Image size is approximately 3668x2498. North is up in this image. The
dominant galaxy is NGC 5068. It is classified SAB(rs)cd. It is an intermediate
barred spiral galaxy with a weak irregular ring. NGC 5068 is about 20 to 45
million light years distant. The lower part of the image shows a smaller edge-on
galaxy, ESO 576-26. It is a little more than twice as distant at 92 to 104
million light years. Many of the background galaxies fall between 300 and
900 million light years distant. There is Quasar that is visible in the
image having a red shift of 1.700 with a lookback of 9.86 billion light
years. These objects,
information, and some of the brighter stars are identified in the annotated
image. Horizontal FOV is approximately 39 arc minutes. Full size
image scale is approximately 0.64 arcsec/pix.. Image center is approximately - Equatorial 2000: RA: 13h 18m 54s Dec: -21°6'12"
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