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MBM 7 and MBM 8 High Latitude Cirrus




Scope: FSQ-106N at f/5, Location: DAA Observatory, Shelter Valley, CA, 27 October,  3 and 6 November 2021  Camera: ASI1600M (Astronomik Gen 2   LRGB Filters)

Exposure:  2 panel mosaic - each panel: 64 x 5 min (1x1 bin, gain 170) Luminance exposures, 20 x 3 min (1x1 bin, gain 120) each - RGB exposures.

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.  Generation of starless nebulosity images (Luminance) - Star XTerminator.  RGB combine, Luminance layering - PixInsight. Stars and Starless Luminance combine - PixInsight. Star deconvolution - PixInsight. Mosaic combine - MosaicByCoordinates  and GradientMergeMosaic - Pix Insight. Final finishing - Affinity Photo. RGB photometric calibration - PixInsight.  Annotation - PixInsight, Aladin (Simbad and NED), and Affinity Photo.  The monochrome starless was combined with a full monochrome image (two stops down in stretch)  for each panel to minimize star bloat with pixel math.  Panel images processed at 4656 x 3520 resolution. Final Image size is approximately 4001x5623.

North is up in this image. This field shows the region of high galactic latitude cirrus nebulae around MBM 7 and MBM 8.  There is also LBN 707 and LBN 711  in this field as well as molecular clouds identified in the PGCC catalog. MBM 7&8 are  about 550 to 850 light years distant and about 430 light years south of the galactic plane. The field is fairly rich with background galaxies including Arp 276 (a galactic pair) and NGC 918, 924, 932, 938 as well as many more distandt galaxies. The field shows a number of Quasars (or Quasar candidates) that are visible in the image -  the most distant has a redshift of 2.86 and a look back of 11.43 billion years . Toward the right center edge is a distant galaxy cluster WHL J022204.6+184628 - it has a redshift of 0.2249 and is 2.676 billion light years distant.  These objects and some of the brighter stars are identified in the annotated image.   Vertical FOV is about 2.66 degrees.  Full size image scale is  about 1.7 arcsec/pix. 

Image center is approximately - Equatorial 2000: RA: 02h 25m 32s Dec: +19 15' 37" 


All images and content remain the property of Jim Thommes - copyright 2003 - 2022

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