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NGC 7129 in Cepheus



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: +6611'08"


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