Object description:Sharpless 2-86 is an emission nebula located near the star Albireo in Cygnus. It is illuminated by the energy from the cluster of bright young blue stars, NGC 6823, in the center of the picture. Open star cluster NGC 6823 is 50 light years across and lies 6000 light years away. The age of the cluster is about two million years.
The huge pillars and dark globules of gas and dust pointing towards the open cluster in the centre are shaped by erosion from hot radiation emitted from the brightest cluster stars.
NGC 6820 is the small reflection nebula in the lower right of the picture.
Image AquisitionThis is a composite of Ha and R-G-B frames with a total integration time of 44 hours imaged on 15 different nights between 2015 and 2020 from my rooftop terrace in the Vienna city centre. Cameras used were AtikONE and ZWO ASI1600m mounted on a Skywatcher/Lacerta 200/800mm Newton, Takahashi Epsilon 130/430mm and Skywatcher Newton 130/650mm.
Total Exposure : 44,2 hoursR-G-B: 630 x 60s (total 10,5h)
Ha: 569 x 213s (total 33,7h)
Imaging dates (15 indivudual nights):02-06/11/2015
08/09/2016
14/09/2016
12/06/2017
22/07/2017
29/07/2017
28/09/2017
16/08/2018
17/08/2018
20/08/2020
21/08/2020
Larger FOV (430mm FL)
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