NGC 4725 in Coma Berenices
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ON IMAGE FOR FULL SIZE VIEW (6033x4074) Scope:
FSQ-106N at f/8- w/ Q-Telex, Location: DAA
Observatory, Shelter Valley, CA, 14 and 15 April 2023, Camera:
ASI2600MM (Astronomik type 2c LRGB, filters) Exposure:
L - 101 x 4 minutes (gain-101 1x1) , RGB - 32 each x 3.5 minutes -
(gain-101 1x1). Processing:
Data Collection - Sequence Generator Pro (as FITs). Sub-frame
calibration - Pixinsight (WBPP). Sub-frame registration and integration
(Average combine - Winsorized Clipping Rejection) - PixInsight (WBPP).
Mure Denoise - PixInsight. Non-linear stretching, normalization and
gradient removal - PixInsight. Curves, Levels, RGB combine,
Luminance layering - PixInsight. Generation of starless Luminance image for
later processing - StarXTerminator. Photometric RGB calibration (SPCC) -
PixInsight. De-convolution - BlurXTerminator. Final finishing
- Affinity Photo. Annotation - PixInsight, Aladin (Simbad and NED), and
Affinity Photo. This image is a LRGB with luminance layering. Image
processed at 6248x4176 resolution. Final Image size is approximately
6033x4074. North
is up in this image. This image shows
NGC 4725 - classed SAB(r)ab pec - at a distance of about 69 million light
years. Along with NGC 4725 is its paired galaxy NGC 4747 (also known as Arp 159)
- classed SBcd pec edge-on. Finally, there is a small dwarf galaxy of NGC
4725 -ASK 667300.0 (LEDA 43595). The three galaxies comprise the galaxy group
NGC 4752/47 Group. At the further distance of 213 million light years is
the galaxy NGC 4712 - classed SA(s)bc. On the upper edge of the image are
several compact galaxy groups with 2.9 to 4.0 billion years of light travel time
(Lookback). The furthest objects visible in this image are the Quasars
- many have light travel time distance over 10 billion years - the highest of these has a
light travel time of 11.68 billion years and a redshift of 3.178. These
objects, information, and some of the brighter stars are identified in the
annotated image.
This image replaces an earlier 2012 image in the Archives
here. Horizontal FOV is approximately 100 arc minutes. Full size image scale
is approximately 0.99 arcsec/pix. Image
Center approximately - Equatorial 2000: RA: 12h 50m 20s Dec: +25°29'34"
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