Upper jaw of one of the Fighting Dragons of Ara (NGC 6188) in HOS colors by Zaytsev and Hanson
A massive star formation region NGC 6188 [1], also called the Rim nebula in the constellation Ara that also forms the “upper jaw” of one of the “dragons” in large formation often recognized as “Fighting Dragons of Ara”, located at a distance of about 1300 pc. The Rim nebula is a shock front caused by the intense UV radiation from a nearby Ara OB1a association and its core part - NGC 6193 (Caldwell 82) open star cluster at the distance of about 1155 pc (sitting outside of the FOV of this particular image at the top side). Visible in the higher optical density part of the nebula (behind the rim on the right side of the image) is the RCW 108 IR star cluster (not to be confused with RCW 108 which is yet another name for NGC 6188) - a young, compact cluster partially embedded in its parent molecular cloud [2].
ASA Ritchey-Chretien RC-1000: D=1m, f/6.8 on alt-azimuthal direct drive fork mount, FLI ProLine 16803 with secondary mirror based motorized focusing and automatic de-rotation (Telescope #1 system of ChileScope observatory, Río Hurtado Valley, Chile).
Mosaic from 17” CDK Click for larger Image
Data and initial calibration/integration: Alexandr Zaytsev https://www.astrobin.com/users/m57ring/ 10x Ha + 10x OIII + 10x SII guided 600 sec exposures (5h of combined integral) collected over 6 imaging sessions carried out on Jun 8, 9, 10 of 2022, Jul 17, 31 of 2022, and Aug 1, 2022 using Chilescope Telescope #1 system.
Image Processing: Mark Hanson www.hansonastronomy.com
Enjoy, Mark and Alex
RC-1000
NGC 6188/6193 “The Cluster of Chaos”
NGC 6188 is an emission nebula located about 4,000 light years away in the constellation Ara and is a star forming nebula, and is sculpted by the massive, young stars that have recently formed there – some are only a few million years old. This spark of formation was probably caused when the last batch of stars went supernova.
The bright open cluster NGC 6193 (also known as Caldwell 82) containing 27 is visible to the naked eye, is responsible for a region of reflection nebulosity within NGC 6188. The cluster is associated with (and provides the energizing radiation for) neighboring regions of the nebulosity NGC 6188
PlaneWave CDK 24 LRGBHaO3S2 from El Sauce, Chile.
Image Processing: Mark Hanson
Data: SWOS Team – Mazlin, Forman, Parker, Hanson
Enjoy,
Mark Hanson
CDK 24