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LBN 629 - Northern Galactic IFN

 

MOUSE-OVER IMAGE FOR STARLESS VIEW

CLICK ON IMAGE FOR FULL SIZE VIEW (7196x4860)

Scope: FSQ-106N at f/5;  Location: DAA Observatory, Shelter Valley, CA; Dates: 22, 23, 24 February, 23, 24 March 2025;  Camera: ASI2600MM (Astronomik type 2c  L RGB filters)

Exposure: Exposure:  Lum - 202 x 3.5 min (gain-101 1x1) and 92 x 5 min (gain-160 1x1), RGB - 54 x 2 min (gain-101 1x1) each RGB exposures.

Processing: Data Collection -  N.I.N.A. Sequencer (as FITs).  Sub-frame calibration - Pixinsight (WBPP). Sub-frame  registration and integration (Average combine -  Linear clipping) - PixInsight (WBPP).  2x Drizzle of Lum stack - PixInsight (WBPP).  Noise reduction - NoiseXTerminator - PixInsight. Non-linear stretching, normalization and gradient removal - PixInsight. Photometric RGB calibration (SPCC) - PixInsight. Deconvolution of Lum, Emission Line, and RGB combine - BlurXTerminator. Generation of starless nebulosity Lum and combined RGB images for later processing - Star XTerminator.  Curves, Levels, RGB combine - PixInsight.  RGB starless and Lum starless  combine (for LRGB starless) - PixInsight.  LRGB stars screened to LRGB starless - Pixinsight.  Final finishing, crop, and resample  - Affinity Photo.   Annotation - PixInsight, Aladin (Simbad), and Affinity Photo. This image is an  LRGB starless composition - with LRGB stars added.  Image processed at 12496x8352 resolution. Final Image size is approximately  7196x4860.

North is down and slightly to the left in this image  (10 degree rotation - equatorial coordinates).  This image shows  the high galactic latitude Cirrus (IFN) of the LBN 629 region. This places these clouds well above the plane of the Milky Way disk. These clouds are not particularly illuminated by single stars, but instead illuminated by the bulk of the Milky Way stars close to the galactic disk.   LBN 629's galactic coordinates are roughly  126 longitude, 32 degrees latitude.  This places it a little further away from the galactic center than that of the sun and on the galaxy's north pole side. 

These high cirrus clouds are fairly faint and take long exposures to reveal - so there is generally less obstruction of light from distant galaxies. You can see many of these distant galaxies in the full size view image when zooming in and panning through the image -

There are also cold clouds (called cold clumps and identified in the Planck Galactic Cold Clump Catalog) in this image. These cold clouds are noted for their low temperatures - lower than their surrounding space. They are not seen in optical wavelengths - they are observed and measured in radio wavelengths. However, they are sometimes coincident with optical wavelength structures. They are of interest since they can be precursors in the evolution of star forming regions. 

These objects and some of the brighter stars are identified in the annotated image Horizontal Full FOV is approximately 2.47 degrees. Full size image scale is about 1.24 arcsec/pix.

Image center is approximately - Equatorial 2000: RA: 11h 15m 45s Dec: +83°46'08"

 

All images and content remain the property of Jim Thommes - copyright 2003 - 2026

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