Another very cool star is in the lower right, RZ Cassiopeiae. This star is also a variable star which is much closer at 219 light-years away and is also surrounded by a blue nebula designated as VdB 7. Although RZ Cas appears to be the source for the nebulosity around VdB 7, research indicates that it is actually a smaller nearby star.
Several dark nebulae are located in the center of dense dusty regions going through the image like a lightning bolt. LDN 1357 is the dark area located on the left most portion while LDN 1355 is the dark area on what appears to be the palm just above SU Cas. The center top houses another dark area known as LDN 1358.
This is another object that was out of my FOV until this year when some new neighbors cut some trees down and opened a small window. The one downside is that a lot of the window starts low in the sky so it is not the most ideal imaging conditions. It is also very dim so there was nothing in the RGB subframes and only a hint in the luminosity. This object would be much improved if it were captured at a darksite. Still I was happy to get this but I had to do a lot processing gymnastics to pull out the nebula.
Dates: 9-19-23, 9-20, 10-10, 10-11, 10-12, 11-2, 11-5, 11-10
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; ZWO L, R, G, B
Focuser: ZWO EAF
Autoguiding: ASI120 Mini attached to an Agena 50mm Guide Scope/ZWO 60mm Guidescope
Exposure: Lum 263 x 120, R 100 x 90, G 122 x 90, B 113 x 90
Gain: 139
Offset 20
Sensor Temp: -10 C
Processing: NINA, PixInsight, Photoshop, BlurXTerminator, StarXTerminator, NoiseXTerminator, Bill Blanshen Masks, GraXpert.
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