Multi-Colored vdB 133 and LBN 218, LBN 219
Multi-Colored vdB 133 and LBN 218, LBN 219
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MOUSE-OVER
IMAGE FOR STARLESS VIEW CLICK
ON IMAGE FOR FULL SIZE VIEW (5400x6030) Scope:
Celestron 9.25 Edge HD 235 mm at f/7; Camera: ASI294MM (Baader
LRGB Filters) Acquisition:
DAA Observatory, Shelter Valley, CA;
/ June 27, July 21, 22, 27, 28, 30, 31, 2025; / 2
panel mosaic: Panel
1 (upper) Lum 172 x 3.5 minutes (gain-121 2x2), RGB -
54 each x 2 minutes -
(gain-121 2x2), Ha - 116 x 4 minutes (gain-160 2x2) Panel
2 (lower)
Lum 152 x 3.5 minutes (gain-121 2x2), RGB - 54 each x 2 minutes -
(gain-121 2x2), Ha - 114 x 4 minutes (gain-160 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 and Ha) - 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, Ha, and RGB images for later processing
(each panel)-
StarXTerminator (PixInsight). Lum starless combined to RGB
starless; Ha starless screened to LRGB starless - Pixinsight Lum stars combined to RGB stars - Pixinsight. LRGB stars screened onto
Ha LRGB starless images - Pixinsight. Mosaic panels registered with "Mosaic
by Coordinates - PixInsight. Mosaic panels combined and balanced for gradients /
intensity - Affinity Photo. Final finishing - Affinity Photo.
Annotation - PixInsight, Aladin (Simbad), and Affinity Photo. This image is a 2
panel Ha LRGB mosaic image. Image processed at 8,331x10,922 resolution (2x drizzle
and panelized). Full Field combined image size is approximately 5400x6030.
Description: North to the lower right corner in this image. The
reflection nebula, vdB 133 is in the upper part of this image. Its illuminating
star is 44 Cyg - a spectral type F5 , blue/white color. This star is about
4,240 light years distance (by parallax estimate); it is embedded within the vdB
133 nebulosity. This places the vdB 133 nebulosity at about the same distance as
that of the star. LBN 218 is seemingly coincident with vdB 133; both have
similar color and brightness descriptions in their respective catalogs and coordinates
are very similar as well. It is likely that the same nebulous structure is
identified by both of these catalog identifiers, however the Simbad astronomical
data base does not list these as co-identifiers.
The lower part of this image is the red dominant LBN
219. It has a high content of Hydrogen Alpha emission as evidenced by the strong
signal from the Ha emission line filter used for this image's exposures. The
star HD195407 is a bright energetic spectral type O2 star - which would qualify
for an ionization star for the LBN 219 emission nebulosity. If so, this star
is about 4,080 light years distant - about the same as 44 Cyg making
LBN 219 and vdB 133 about the same distance. The vdB 133 reflection nebula
likely has true reflection from 44 Cyg (blue/white) and Ha emission content
(red). In addition, the vdb 133 is in a strong absorption region where dust can
reflect neutral brown color while absorbing blue light. These conditions give
vdB 133 it's color variety.
These objects,
information, and some of the brighter stars are identified in the annotated
image.
The Horizontal Full FOV is approximately 0.662 degrees. Full
size, full field image scale is approximately 0.442 arcsec/pix.
Image
center approximately - Equatorial 2000: RA: 20h 30m 28s Dec: +37°02'13"
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