The Draco Nebula and MBM 42, MBM 43
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CLICK ON IMAGE FOR FULL SIZE VIEW (3800x2850) Scope: Explore Scientific MN152 at f/4.8, Location: DAA Observatory, Shelter Valley, CA, 5 and 13 May 2021 Camera: ASI1600M (Astronomik Gen 2 LRGB Filters) Exposure:
Exposure: L - 64 x 4 minutes (gain-220 1x1) , RGB - 20 each x 3 minutes
- ( gain-121 1x1).
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 image
(Luminance) - Star XTerrminator Curves, Levels, 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. The
monochrome starless was combined with a full monochrome image (two stops down in
stretch) to minimize star bloat (using pixel math). Image processed at
4656x3520 resolution. Final
Image size is approximately 3800x2850. North is up in this image. This
image captures the central portion of the generally named "Draco
Nebula". The more well known catalogs do not cover this area - but MBM 42
and MBM 43 in this image are in the generally known Magnani, Blitz, Mundy
catalog of Molecular clouds at High Galactic Latitudes . What is unique with
this complex is that they are high velocity clouds (around 23 km/sec). While
this image does not contain popular objects, there are some fairly interesting
items. The distant galaxy cluster NSC j165342+611800 is about 2.15 billion light
years distant (redshift lookback time). Several other galaxies are also in
this image and range from 652 to 881 million light years distant. There are also
a number of visible Quasars that range in redshift from 0.100 to 2.900 (1.29 to
11.46 billion light years Lookback). These objects,
information, background galaxies and some of the brighter stars are identified in the
annotated
image. Horizontal FOV is approximately 85 arc minutes. Full size
image scale is approximately 1.34 arcsec/pix.. Image center is approximately - Equatorial 2000: RA: 16h 53m 50s Dec: 61° 11 22"
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