CLICK ON IMAGE FOR FULL SIZE VIEW (6632x4513)

Scope: Celestron 9.25 Edge HD 235 mm at f/7; Location: DAA Observatory, Shelter Valley, CA;  Dates:  22, 23 February, 23, 24 March, 2025; Camera: ASI294MM (Baader  LRGB Filters)

Exposure:   Lum 208 x 3.5. minutes (gain-121 2x2), RGB - 54 each x 2 minutes  - (gain-121 2x2).

Processing: Data Collection -  N.I.N.A. (as FITs).  Sub-frame calibration - Pixinsight (WBPP). Sub-frame  registration and integration (Average combine -  Linear fit clipping,  2X drizzle for  Lum) - PixInsight (WBPP).  Noise reduction - NoiseXTerminator (RGB, Lum) - PixInsight.  Non-linear stretching for Lum - PixInsight. RGB combine and stretching, Photometric RGB calibration (SPCC)  - PixInsight. De-convolution - BlurXTerminator (AI4) - PixInsight. Generation of starless  Lum and RGB image for later processing - StarXTerminator (PixInsight).  Lum stars (lower stretch) screened into Lum starless  for star size control - PixInsight.  Luminance  combined to RGB image - Pixinsight. Final finishing  - Affinity Photo.  Annotation - PixInsight, Aladin (Simbad), and Affinity Photo. This image is an LRGB image.  Image processed at 8288x5644 resolution (2x drizzle stacks). Full Field image size is approximately 6632x4513.

North is up in this image. This image shows a number of astronomical objects . First there is the central galaxies  - the NGC 4411 pair.  NGC 4411 is the galaxy on the right; the galaxy on the left is UGC 7546 (also known as NGC 4411B). Their distances are  similar - about 74 million light years (by redshift estimate). It is interesting to note their spiral arms are in opposite directions. The little galaxy below the pair (PGC 40737) has a similar distance - so it is in the neighborhood. 

Next there is is the NGC 4410 galaxy group in the center top of the image. It is notable for its tidal stream of stars (bridges) between the galaxies.  On the right is NGC 4410 and its close pair PGC 40607 (NGC 4410B). Next and to the left is IC 790 (NGC 441C). Finally, furthest left is PGC 40736 (LEDA 40736, NGC 4410D). Their distances are similar - between 326 to 359 million light years by redshift estimate.   

Last is the distant galaxy cluster, Abell 1541 (ACO 1541). This cluster's core area takes up most of the left part of the image - some cluster members lay outside of the image field. The cluster is centered about 1,248 million light years distant by redshift estimate. Abell 1541 is a rich cluster - in Abell's catalog it is designated class 1 in richness. Two of the brightest galaxy structures in Abell 1541 are PGC94216 galaxy and the tight galaxy pair [WLH2009] 533. The cluster members have about a 9% wavelength stretch due to  their distance / redshift - so members are generally recognized by the reddening color. The starless mouse-over  gives a better indication of these distant galaxies.

Many other background galaxies are also seen more easily in the starless mouse-over (isolated from the Milky Way galaxy stars). There are numerous Quasars as well - the furthest is SDSS J122604.74+085341.0 with a light travel time (Lookback) of 10.75 billion years and redshift of 2.234. These objects, information, and some of the brighter stars are identified in the annotated image.   

The Horizontal Full FOV is approximately 0.667 degrees. Full size, full field image scale is approximately 0.361 arcsec/pix.

Image center approximately - Equatorial 2000: RA: 12h 26m 39s Dec: +08°55'30"