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Cassiopeia A (Cas A) Supernova Remnant in SII/OIII/RGB, 



    
        

            Sergey Trudolyubov
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Cassiopeia A (Cas A) Supernova Remnant in SII/OIII/RGB

Imaging telescopes or lenses: Lacerta Photonewton 250/1000

Imaging cameras: ZWO ASI 183MM Pro

Mounts: Orion HDX110 EQ-G

Guiding telescopes or lenses: Lacerta Photonewton 250/1000  ·  60mm Guidescope

Guiding cameras: Orion Starshoot autoguider

Focal reducers: GPU Coma Corrector (4-element)

Software: Photoshop CC  ·  PixInsight  ·  DeepSkyStacker (DSS) 3.3.2  ·  FITS Liberator  ·  PHD2 Guiding Software

Filters: Astrodon 5nm OIII 36mm  ·  Astrodon B Gen2 E-Series 36mm  ·  Astrodon G Gen2 E-Series 36mm  ·  Astrodon R Gen2 E-Series 36mm  ·  Baader SII 36mm Filter 8nm

Accessory: ZWO EFW 7 x 36mm


Dates:Sept. 18, 2019Oct. 6, 2019Oct. 24, 2019Oct. 26, 2019Nov. 4, 2019

Frames:
Astrodon 5nm OIII 36mm: 47x300" (gain: 200.00) -10C bin 1x1
Astrodon B Gen2 E-Series 36mm: 256x30" (gain: 200.00) -10C bin 1x1
Astrodon G Gen2 E-Series 36mm: 220x30" (gain: 200.00) -10C bin 1x1
Astrodon R Gen2 E-Series 36mm: 240x30" (gain: 200.00) -10C bin 1x1
Baader SII 36mm Filter 8nm: 47x300" (gain: 200.00) -10C bin 1x1

Integration: 13.8 hours

Avg. Moon age: 17.45 days

Avg. Moon phase: 42.90%


Astrometry.net job: 3258171

RA center: 23h 23' 25"

DEC center: +58° 48' 48"

Pixel scale: 0.495 arcsec/pixel

Orientation: 0.713 degrees

Field radius: 0.210 degrees


Resolution: 2496x1758

Locations: Abiqui Lake, Abiqui, New Mexico, United States; Los Alamos, Los Alamos, New Mexico, United States

Data source: Traveller

Description

Cassiopeia A (Cas A) supernova remnant, one of the best studied objects in the sky at all wavelengths, but rarely imaged by amateur astronomers due to its small size and low brightness. This image is a combination of narrowband (OIII and SII) and RGB data taken over several nights in September-November 2019 with 250mm f/4 Lacerta Photonewton and ASI183MM Pro camera. The individual narrowband and broadband exposures were taken at camera gain 200. To reduce the effect of bad seeing, final RGB images were constructed from a series of short (30 s) exposures with FWHM<3.0". The synthetic luminance was produced using SII, OIII and RGB data. R and B color channels are a blend of the broadband and narrowband images: R(R and SII) and B(B and OIII).

OIII: 47x300s (Gain 200, bin 1x1)
SII: 47x300s (Gain 200, bin 1x1)
R: 240x30s (Gain 200, bin 1x1)
G: 220x30s (Gain 200, bin 1x1)
B: 256x30s (Gain 200, bin 1x1)

Total exposure: 13.8 hours

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strudolyubov
Sergey Trudolyubov
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    Cassiopeia A (Cas A) Supernova Remnant in SII/OIII/RGB, 



    
        

            Sergey Trudolyubov
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  • Cassiopeia A (Cas A) Supernova Remnant in SII/OIII/RGB, 



    
        

            Sergey Trudolyubov
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Cassiopeia A (Cas A) Supernova Remnant in SII/OIII/RGB, 



    
        

            Sergey Trudolyubov

In these public groups

ZWO ASI183/QHY183