This is my wide field shot of the region around IC 5146, the Cocoon Nebula (also Caldwell 19, Sh 2-125, Barnard 168), in the Cygnus constellation. IC 5146 is an emission and reflection nebula 15 light years wide and located 4000 light years away. There is a lot of dust in around IC 5146 with a dark dust tail containing several dark nebulae streaming towards the top of my image. These dark nebulae are in Lynds Dark Nebula catalog and designated LDN 1042, 1045, 1047, 1030, 1031, 1040, 1035 and 1040 where LDN 1042 is closest to IC 5146 and LDN 1040 is farthest away. My favorite is LDN 1035 which seems to resemble a crown at the top center of my image.
IC 5146 is relatively bright and ionized hydrogen gas gives it the reddish glow. The small blue reflection nebula to the upper right of IC 5146 is vdB 147. This image was taken with the ASI2600 MC (a color camera) and I did not use a filter in order to capture the heavily dusted region as well as the stars, however, to capture the faint red glow of the ionized hydrogen in the background I used the dual band IDAS NBZ filter. This filter is capable of picking up ionized hydrogen (red) and ionized oxygen (blue). The two separate images were then blended inorder to highlight the dust and stars of the unfiltered data and the glowing hydrogen of the filtered image.
On the left side of the image there is a blue nebula surrounding bright star coordinates, ~ 49 03 16, 22 00 23, which only shows up in the data collected using the dual band IDAS NBZ filter. Since it is blue that would indicate that it is composed of oxygen rather than the hydrogen that predominates most of the background in this region.
IC 5146 is relatively bright and ionized hydrogen gas gives it the reddish glow. The small blue reflection nebula to the upper right of IC 5146 is vdB 147. This image was taken with the ASI2600 MC (a color camera) and I did not use a filter in order to capture the heavily dusted region as well as the stars, however, to capture the faint red glow of the ionized hydrogen in the background I used the dual band IDAS NBZ filter. This filter is capable of picking up ionized hydrogen (red) and ionized oxygen (blue). The two separate images were then blended inorder to highlight the dust and stars of the unfiltered data and the glowing hydrogen of the filtered image.
On the left side of the image there is a blue nebula surrounding bright star coordinates, ~ 49 03 16, 22 00 23, which only shows up in the data collected using the dual band IDAS NBZ filter. Since it is blue that would indicate that it is composed of oxygen rather than the hydrogen that predominates most of the background in this region.
Addendum: The OIII nebulosity on the left is indeed an object discovered in 2019 by Marcel Drechsler and Andreas Zirke. They described it as an OIII structure surrounding the star HD 209204 and designated it as Drechsler - Zirke 1 (https://www.astrobin.com/f8o5xg/?q=Drechsler-%20Zirke%201).
RGB
IC 5146 - Cocoon Nebula (wide field)
Dates: 10-2-23, 10-3, 10-4, 10-10, 10-11, 10-12, 10-13, 11-1, 11-2, 11-5, 11-12
Camera: ZWO ASI2600MC Pro
Telescope: Askar FRA300 Pro
Barlow: None
Focal Length: 300mm
F/5
Focal Reducer: None
Mount: Orion Atlas Pro
Filter Adaptor: ZWO Filter Drawer
Filter: IDAS NBZ, Camera UV-IR
Focuser: ZWO EAF
Autoguiding: ASI120 Mini attached to a ZWO Mini guidescope
Exposure: UV-IR 358 x 120 (11h 56m), NBZ 318 x 180 (15h 54m)
Gain: 100
Offset 0
Temp: -10 C
Processing: Asiair app, PixInsight, Photoshop, BlurXT, NoiseXT, StarX, Bill's Color Masks, Bill's Star Reduction, GraXpert
https://www.instagram.com/astroquest1/
http://astroquest1.blogspot.com/
https://www.astrobin.com/users/kurtzepp/collections/
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Dates: 10-2-23, 10-3, 10-4, 10-10, 10-11, 10-12, 10-13, 11-1, 11-2, 11-5, 11-12
Combined RGB and IDAS NBZ
Dates: 10-2-23, 10-3, 10-4, 10-10, 10-11, 10-12, 10-13, 11-1, 11-2, 11-5, 11-12
Camera: ZWO ASI2600MC Pro
Telescope: Askar FRA300 Pro
Barlow: None
Focal Length: 300mm
F/5
Focal Reducer: None
Mount: Orion Atlas Pro
Filter Adaptor: ZWO Filter Drawer
Filter: IDAS NBZ, Camera UV-IR
Focuser: ZWO EAF
Autoguiding: ASI120 Mini attached to a ZWO Mini guidescope
Exposure: UV-IR 358 x 120 (11h 56m), NBZ 318 x 180 (15h 54m)
Gain: 100
Offset 0
Temp: -10 C
Processing: Asiair app, PixInsight, Photoshop, BlurXT, NoiseXT, StarX, Bill's Color Masks, Bill's Star Reduction, GraXpert
https://www.instagram.com/astroquest1/
http://astroquest1.blogspot.com/
https://www.astrobin.com/users/kurtzepp/collections/
http://youtube.com/AstroQuest1
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