LBN 576, also known as Abell 85 (or CTB 1), is a remnant supernova event that occurred 10,000 years ago towards the constellation of Cassiopeia. It was formed when a star used up all of its elemental fuel and exploded. The glowing shell of gas nicknamed the Popped Balloon or Medulla Nebula glows in visible light as a result of its collision with interstellar gas.
This is a first for me on this object and I am quite happy with the results. It is very faint which is most likely why it is not imaged as much as the nearby Heart and Soul Nebula, in fact there was barely anything in any of the subframes. Processing was interesting as I used the new AI version GraXpert Gradient Extractor (https://www.youtube.com/watch?v=AzDDafSrZ7k&t=0s) which was incredibly simple. I have been using just BXT for star reduction but this time I experimented with the settings to keep better star shapes but it did not reduce the stars as much, so I did addition reduction with Bill's star reduction and with using curves. The hard part in processing was trying to keep as much Ha detail while incorporating the OIII data. After doing a normal HOO blend I added the Ha as luminosity because of its great detail but it drowned out the OIII. After doing several additional OIII bends, the detail and OIII color were preserved.
This is a first for me on this object and I am quite happy with the results. It is very faint which is most likely why it is not imaged as much as the nearby Heart and Soul Nebula, in fact there was barely anything in any of the subframes. Processing was interesting as I used the new AI version GraXpert Gradient Extractor (https://www.youtube.com/watch?v=AzDDafSrZ7k&t=0s) which was incredibly simple. I have been using just BXT for star reduction but this time I experimented with the settings to keep better star shapes but it did not reduce the stars as much, so I did addition reduction with Bill's star reduction and with using curves. The hard part in processing was trying to keep as much Ha detail while incorporating the OIII data. After doing a normal HOO blend I added the Ha as luminosity because of its great detail but it drowned out the OIII. After doing several additional OIII bends, the detail and OIII color were preserved.
Dates: 8-22-23, 8-23, 8-27, 8-31, 9-1, 9-3, 9-4, 9-6, 9-12, 9-14, 9-16
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LBN 576 (Abell 85) - Supernova Remnant
Dates: 8-22-23, 8-23, 8-27, 8-31, 9-1, 9-3, 9-4, 9-6, 9-12, 9-14, 9-16
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: Ha 107 x 300, OIII 97 x 300, R 39 x 90, G 42 x 90, B 45 x 90
Gain: 139
Offset 20
Sensor Temp: 0 C
Processing: NINA, PixInsight, Photoshop, BlurXTerminator, StarXTerminator, NoiseXTerminator, Grapert, Bill Blanchan Star Reduction.
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