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NGC 6992 and 6995 "Network Nebula"



Scope: Explore Scientific MN152 Maksutov Newtonian at f/4.8, Location:  Laguna Mountains, CA   15 August 2015  Camera: ST 8300M

Exposure: Exposure: 12 x 5 min  (1x1 bin) exposure with UV/IR block,  12 x 10 min (1x1 bin) H-Alpha exposures, 8 x 4 min (2x2 bin) RGB exposures.

Processing: Data Collection -  Sequence Generator Pro (as FITs).  Calibrated, stacked (Kappa Sigma Combine) Deep Sky Stacker, LRGB channel registration, equalization, and central gradient removal - Astroart.  Curves, Levels, RGB combine Images Plus. Luminance layering and finishing  - Photoshop. This image is a  Ha LRGB combine with Luminance layering. The H-Alpha exposure stack was screen blended to the Luminance exposures  to form the Luminance layer.   Color saturation in LAB color;    Final Image size is approximately 2800x2100.

North is to the right in this image. Central in this image is the emission / reflection nebula structure whose parts are separately cataloged NGC 6992, NGC 6995, and IC 1340. This image shows part of a larger object that is a supernova remnant. The super nova remnant is sometimes referred to as the Cygnus Loop (see other images NGC 6960, NGC 6979,).  The supernova was estimated to have exploded about 5,000 to 8,000 years ago, The supernova remnant was historically estimated  to be about 2,600 light years distant from Earth. However, more recent estimate propose a distance of  from 1,470 to 1,880. There is not much else in this field but there is a recognizable background galaxy (2MFGC 15860) just above the central portion of NGC 6992. These objects and some of the brighter stars are identified in  the annotated image.  This image replaces an earlier image that can be seen in the Archives here.   Horizontal FOV is 85'

Image center is approximately - Equatorial 2000: RA: 20h 56m 17s Dec: +3121'58"


All images and content remain the property of Jim Thommes - copyright 2003 - 2015 copyright 2003 - 2012

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