Sh2- 115 and Sh2-116
About image
Sh2-115 is an emission nebula located about 2.5 ° northwest of Deneb, in Cygnus constellation.
Its apparent extension is 50'x50 'and its estimated distance is 7500 light years.
Just below the center, toward the right side of the image we see a round-shaped nebula: it is Sh2-116, considered for a long time a planetary nebula due to its shape, then a 1991 study made it clear that it is actually an emission nebula.
I obtained this image from my home terrace, with severe light pollution from street lamps but, above all, with very variable conditions of sky transparency across the 5 nights of exposures.
Technical data
Optic Tecnosky Apo refractor LT 130-910 with Riccardi reducer 0.75x (focal lenght 692mm, f/5.3)
Mount Skywatcher EQ8
Camera Moravian G3-16200 CCD with external filter wheel 7 positions
Filters Baader 50mm unmounted RGB, Ha 7nm
Guiding system Artesky Ultraguide 70mm
Exposure details R 23x300" bin1 -15C
G 22x300" bin1 -15C
B 24x300" bin1 -15C
Ha 57x600" bin1 -15C
Total integration 15h15'
Acquisition Voyager, PHD2
Processing Pixinsight 1.8, Photoshop CS5, NoiseXTerminator, BlurXterminator, StarXTerminator
SQM-L 18.2
Location Rescaldina (Italy), home terrace
Date 23/24/25/26/27 June 2025
© Roberto Marinoni 2019 - All rights reserved