Imaging telescope or lens: VIXEN R200SS
Imaging camera: ATIK 383L+ mono
Mount: SkyWatcher AZ-EQ6
Guiding telescope or lens: Orion 50mm guidescope
Guiding camera: Orion Starshoot Autoguider
Accessory: Vixen Coma Corrector 3
Integration: 4.5 hours
Avg. Moon age: 25.61 days
Avg. Moon phase: 17.17%
Bortle Dark-Sky Scale: 4.00
Astrometry.net job: 731070
RA center: 285.243 degrees
DEC center: -36.961 degrees
Orientation: -2.129 degrees
Field radius: 0.779 degrees
Locations: Home observatory, Glenorie, NSW, Australia
NGC 6723 in Sagittarius is the globular cluster shown in the lower left part of the image. It is spans 87 light years across at a distance of approx. 28,500 light years. The bright (blue) reflection nebulae just over the boundary in Corona Australis (the Southern Crown) are much closer to us at 420 light years. The brightest one with the two cores has two NGC numbers 6726 and 6727. To the upper left of that is IC 4812 close to the double star that is easily recognised because of its twin diffraction spikes. Slightly above NGC 6726/6727 is the small white/yellow triangular nebula NGC 6729 that surrounds variable star R Coronae Australis. Close by that is the hook shaped Herbig Haro Object which is being thrown off by a newly born star. The new star's rotation probably determines the shape of this object.
The reflection nebula are set against the backgound of the Milky Way but the myriad of stars there is obscured over large parts of the image by clouds of gas and dust. The denser parts hide almost all of the background stars while the thinner parts show up as brownish/grey clouds. At the distance of the dust clouds and nebulae the image spans 9 light years. This means that all of the “close by” objects in the image are packed into a region only twice the size of the distance from our Sun to its nearest star.
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