NGC 7129 in Cepheus
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CLICK ON IMAGE FOR FULL SIZE VIEW (2514x3352) Scope: Explore Scientific MN152 Maksutov Newtonian at f/4.8, Location: DAA Observatory, Shelter Valley, CA, 23 August 2020, Camera: ST8300M (Baader LRGB filters) Exposure:
Exposure: 26 x 8 min (1x1 bin) exposure with UV/IR block filter, 10 x
4 min (1x1 bin) each RGB
exposures.
Processing: Data
Collection - Sequence Generator Pro (as FITs). Subframe calibration
- Pixinsight. Subframe registration and integration (Average combine - Winsorized Sigma
Clipping) - PixInsight. Non-linear stretching, normalization and
gradient removal - PixInsight. Generation of starless nebulosity Luminance
image
for later processing - starnet++. Curves, Levels, RGB combine, Luminance
layering - PixInsight. Stars and Starless Luminance combine - PixInsight. Final finishing - Photoshop. RGB calibration
- PixInsight. Annotation - PixInsight, Aladin (Simbad and NED), and PhotoShop. This
is a RGB image with luminance layering. The luminance stack, slightly stretched,
was separated in to starless and "stars only" images. The stretching
on each (starless and "stars only") continued separately. The starless
and "stars only" was then combined after they were separately
finished. The resulting image was used as luminance for the image composed
of the RGB data. Images processed at 3352 x 2532 resolution. Final
Image size is approximately 3000x2250. North is up in this image. Roughly
central in this image is open cluster NGC 7129 - popularly known as the Cosmic
Rosebud - and the surrounding nebulosity is variously known as LBN 497, vdB 146,
Ced 196, [RK68] 112, and [KPS2012] MWSC 3549. In the lower left is the open
cluster NGC 7142. The distance of NGC 7129 is 3,300 light years and the distance
of NGC 7142 is 3,980 light years. Within and around the nebulosity of the Cosmic
Rosebud are [RK68] 110, reflection nebula, several Herbig-Haro objects and
a Red Nebulous Object RNO 138. There are several dark nebulae and Molecular
clouds. There are some background galaxies - the only one with a distance
estimate is 2MFGC 16419 whose distance is about 380 million light years. These objects
and some of the brighter stars are identified in the annotated
image. This image replaces an earlier image in
the archives here. Vertical FOV is approximately 88 arc minutes. Full size
image scale is 1.57 arcsec/pix. Image center is approximately - Equatorial 2000: RA: 21h 43m 54s Dec: +66°11'08"
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