Imaging telescopes or lenses: PlaneWave Instruments CDK 12.5"
Imaging cameras: Moravian Instrument G4-16000
Mounts: Astro-Physics Inc AP 1100 GTO
Guiding telescopes or lenses: PlaneWave Instruments CDK 12.5"
Guiding cameras: Atik 414EX
Software: TheSkyX · Adobe Photoshop CC 2020 · Pixinsight · MaxPilote · FocusMax4
Filters: Chroma Technology Chroma OIII 3nm · Chroma Red · Chroma Technology Chroma Blue · Chroma Technology Chroma Green · Chroma Technology Chroma R · Chroma Technology Chroma L · Chroma Technology Chroma SII 3nm · Chroma Technology Chroma Ha 3nm
Accessory: Skyméca DO 3"
Dates:Sept. 23, 2020 , Sept. 24, 2020 , Sept. 25, 2020 , Sept. 26, 2020
Frames:
Chroma Technology Chroma Blue: 24x300" -20C bin 1x1
Chroma Technology Chroma Green: 26x300" -20C bin 1x1
Chroma Technology Chroma L: 63x300" -20C bin 1x1
Chroma Technology Chroma R: 27x300" -20C bin 1x1
Integration: 11.7 hours
Darks: ~85
Flats: ~7
Bias: ~200
Avg. Moon age: 8.29 days
Avg. Moon phase: 59.37%
Bortle Dark-Sky Scale: 1.00
Astrometry.net job: 4071574
RA center: 17h 24' 4"
DEC center: -23° 50' 45"
Pixel scale: 0.733 arcsec/pixel
Orientation: 358.983 degrees
Field radius: 0.584 degrees
Resolution: 4026x4096
Data source: Own remote observatory
Remote source: Observatorio El Sauce
Located in the Constellation of Ophiuchus, a set of dark nebulae masks the stars. They are referenced in Barnard's catalogue, in this image the 2 best known are B72 which has the shape of the snake and Barnard 68 below right.
(to the left of the snake in its extension and quite diffuse one has B389, and from right to left under the snake we find B68, B69,B71, B70 and bottom left above the star B74.)
These dark nebulae are made up of dust and high-concentration molecular gas that absorb virtually all the visible light emitted by the stars in the background. Their particularly dark contours contribute to making the interior of molecular clouds one of the coldest and most isolated places in the Universe. The fact that no star is visible in the center indicates that Barnard 68 is relatively close, with measurements placing it about 500 light-years from Earth for a diameter of half a light-year, Barnard 72 would be at it located at about 650 AL. It is not clear how these molecular clouds form, but it is thought that these clouds are probably probably a place where new stars form. And in fact, recent studies have shown that Barnard 68 is probably contracting to give birth to a new solar system. It is possible to see directly through this type of cloud by observing them in infrared light.
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