This is my latest version of a colorful object known as Lower's Nebula or SH2-261. The nebula is a hydrogen alpha (Ha) region about 3,200 light-years away in Orion, specifically where the hand meets the club. It also contains a fair amount of sulfur (SII) and a lesser amount of oxygen (OIII). The Orion constellation has so many neat deep sky objects in addition to the most commonly imaged objects. There is only one page of images of beautiful nebulae currently on Astrobin, however, images are increasing quickly as more people discover it. It is named after amateur astronomer Harold Lower and his son Charles who discovered this nebula in 1939 in their home of San Diego.
I first did an HaRGB version in 2020 (7 hr 24 min) with this telescope and camera and then again in 2023 with the Celestron Edge800. This new version is far superior than either of my previous attempts in terms of fine detail although the 2020 version does show a lot of nebulosity. This sits in a pleasant colorful starfield which I wanted to preserve. As such, the only star reduction I did was the standard Star Xterminator default.
I first did an HaRGB version in 2020 (7 hr 24 min) with this telescope and camera and then again in 2023 with the Celestron Edge800. This new version is far superior than either of my previous attempts in terms of fine detail although the 2020 version does show a lot of nebulosity. This sits in a pleasant colorful starfield which I wanted to preserve. As such, the only star reduction I did was the standard Star Xterminator default.
Higher Quality:
https://www.astrobin.com/g7puxm/?nc=collection&nce=712
https://www.astrobin.com/g7puxm/?nc=collection&nce=712
https://www.instagram.com/astroquest1/
http://astroquest1.blogspot.com/
https://www.astrobin.com/users/kurtzepp/collections/
http://youtube.com/AstroQuest1
Sh2-261 Lower's Nebula (2025)
Dates: 1-27-25, 1-29, 2-1, 2-4, 2-17, 2-18, 2-21, 2-25, 3-1, 3-2, 3-3, 3-4
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; ZWO R, G, B, UV
Focuser: ZWO EAF
Autoguiding: ASI120 Mini attached to an Agena 50mm Guide Scope/ZWO 60mm Guidescope
Exposure: Ha 93 x 300, OIII 99 x 300, SII 95 x 300, R 40 x 90, G 30 x 90, B 37 x 90 (26h 35')
Gain: 139
Offset 20
Sensor Temp: -20 C
Processing: NINA, PixInsight, Photoshop, BlurXTerminator, StarXTerminator, NoiseXTerminator, GraXpert, Bill Blanshan Stretching, Topaz Denoise.
https://www.instagram.com/astroquest1/
http://astroquest1.blogspot.com/
https://www.astrobin.com/users/kurtzepp/collections/
http://youtube.com/AstroQuest1
Offset 20
Sensor Temp: -20 C
Processing: NINA, PixInsight, Photoshop, BlurXTerminator, StarXTerminator, NoiseXTerminator, GraXpert, Bill Blanshan Stretching, Topaz Denoise.
https://www.instagram.com/astroquest1/
http://astroquest1.blogspot.com/
https://www.astrobin.com/users/kurtzepp/collections/
http://youtube.com/AstroQuest1
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