Hemisphere:  Northern  ·  Contains:  9 Cas  ·  The star 9Cas
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CTB1 (Abell 85) Supernova Remnant, 


            Phil Brewer
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CTB1 (Abell 85) Supernova Remnant

Imaging telescopes or lenses: Teleskop-Service ONTC 8" f/4 Newton

Imaging cameras: QSI 683wsg-8

Mounts: Orion Atlas AZ/EQ Pro

Guiding telescopes or lenses: Teleskop-Service ONTC 8" f/4 Newton

Guiding cameras: QHYCCD QHY5L-II mono

Focal reducers: GPU Optics f4 Aplanatic Coma Corrector

Software: Seqence Generator Pro  ·  PixInsight

Filters: Astrodon 3nm Ha  ·  Astrodon E-series Luminance

Accessory: Moonlite Model CR Newtonian Focuser

Dates:Aug. 14, 2020Aug. 16, 2020Aug. 17, 2020Aug. 18, 2020Aug. 19, 2020Sept. 5, 2020Sept. 6, 2020

Astrodon 3nm Ha: 24x1800" bin 1x1
Astrodon 3nm OIII: 23x1800" bin 1x1

Integration: 23.5 hours

Avg. Moon age: 20.71 days

Avg. Moon phase: 30.09%

Astrometry.net job: 3841298

RA center: 23h 59' 46"

DEC center: +62° 23' 51"

Pixel scale: 1.393 arcsec/pixel

Orientation: 0.626 degrees

Field radius: 0.752 degrees

Resolution: 3120x2328

Locations: Home Backyard, Ida, Michigan, United States

Data source: Backyard


I've seen it called the Garlic Nebula, and I can't disagree. Very dim target, long exposures to keep the read noise down.



Phil Brewer
License: Attribution-NonCommercial Creative Commons

Sky plot

Sky plot


CTB1 (Abell 85) Supernova Remnant, 


            Phil Brewer

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