Heckathorn-Fesen-Gull 1 (HFG1) & Abell6 – (Rouz Astro Reducer-OAG)

Heckathorn-Fesen-Gull 1 (HFG1) & Abell6 – CDK14

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Imaging Telescopes Or Lenses : Planewave CDK14 (Rouz Astro Reducer-OAG)
Imaging Cameras : QHYCCD QHY600PH M
Mounts : Astro-Physics 1100GTO
Filters : Chroma H-alpha 3nm Bandpass 50 mm · Chroma OIII 3nm Bandpass 50 mm
Accessories : Optec Gemini Rotating Focuser · Optec Sagitta Off-Axis Guider · Planewave Reducer 0.66x CDK12.5-14-17
Software : Pleiades Astrophoto PixInsight · Stefan Berg Nighttime Imaging ‘N’ Astronomy (N.I.N.A. / NINA)

Acquisition details

Dates : Nov. 15, 2022
Frames : Chroma H-alpha 3nm Bandpass 50 mm: 175×600″(29h 10′) (gain: 56.00) -10°C bin 1×1
Chroma OIII 3nm Bandpass 50 mm: 66×600″(11h)
Integration : 40h 10′
Avg. Moon age : 21.20 days
Avg. Moon phase : 60.00%


Cosmic Bubbles : Heckathorn-Fesen-Gull 1 – HFG1 & Abell 6Located in Cassiopeia, probably one of the dimmest nebulae I’ve imaged.
Overall, some 40 hours of data was used, a lot of subs were removed due to low SNR. HFG1 is a planetary nebula in Cassiopeia. The estimated 10,000 year old nebula has a very dim blue-green leading bow shock with a tail on the opposing side. The smaller Abell 6 is another dim planetary nebula. It consists of more Oiii than H-alpha, hence the prominent bluish white color.
The Telescope:
The faster optical setup of the CDK14 at f/4.7 and the 3nm narrowband filters were useful to increase the FOV and increase the image brightness that helped overcome noise. I would have preferred more Oiii data but the number of clear nights are very limited now.

Shown here is Ha-OO mapped to RGB with a slightly modified expression:

R: Ha
G: ((OiiiHa)^~(OiiiHa))Ha + ~((OiiiHa)^~(OiiiHa))Oiii
B: Oiii

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