Sh2-115 & Sh2-116 (2025)

The main object in this field is the emission nebula Sh2-115 located 7500 light-years away in the constellation Cygnus. Hot stars in a small star cluster designated as Berkeley 90 located within the nebula are ionizing the gases causing the nebula to glow. The small blue nebula on the left is Sh2-116, also known as Abell 71 or Pk 85+04.1, is a planetary nebula. It is unclear to me how far away Sh2-116 is from us as several sources suggest that it is part of the Sh2-115 complex making it 7500 light-years away, however, other sources suggest it is 2400 light-years away.

In addition to the main attractions I also like the swirling hydrogen bands in the region as well as the colorful starfield of this region.

Higher Quality:
https://www.astrobin.com/bfgqzb/?nc=collection&nce=712

Sh2-115 & Sh2-116 (2025)
Dates: 6-2-25, 6-4, 6-20, 6-23, 6-24, 6-29 
Camera: ZWO ASI1600MM-Pro
Telescope: Astro-Tech AT115EDT 115mm Refractor Telescope
Barlow: None
Focal Length: 805mm (644mm w/ FR)
f/7
Focal Reducer: 0.8x AstroTech Field Flatterner/Focal Reducer
Mount: Orion Sirius
Filter Wheel: ZWO
EFW 8 x 1.25"
Filter: Antlia Ha, OIII, SII; ZWO R, G, B, UV
Focuser: ZWO EAF
Autoguiding: ASI120 Mini attached to an Agena 50mm Guide Scope/ZWO 60mm Guidescope
Exposure: Ha 100 x 300, OIII 77 x 300, SII 73 x 300, R 38 x 90, G 39 x 90, B 40 x 90 (23h 45')
Gain: 139
Offset 20
Sensor Temp: 0 C
Processing: NINA, PixInsight, Photoshop, BlurXTerminator, StarXTerminator, NoiseXTerminator, GraXpert, Bill Blanshan Stretching, Bill's Star Reduction, Topaz Denoise.

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