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Getting plate-solving status, please wait...

CTB 1 (Abell 85) Supernova Remnant

Technical card

Imaging telescope or lens:Takahashi FSQ 106ED

Imaging camera:SBIG ST-10XME

Mount:Astro-Physics 900 GTO

Filters:Ha 5nmAstrodon 3nm OIIIAstrodon I-series

Resolution: 2067x1369

Dates:Sept. 3, 2019Sept. 22, 2019Nov. 3, 2019

Astrodon 3nm OIII: 65x900" bin 1x1
Astrodon I-series: 36x5" bin 2x2
Ha 5nm: 188x900" bin 1x1

Integration: 63.3 hours

Avg. Moon age: 11.24 days

Avg. Moon phase: 36.45% job: 3079179

RA center: 23h 58' 39"

DEC center: +62° 36' 46"

Pixel scale: 2.642 arcsec/pixel

Orientation: 103.028 degrees

Field radius: 0.910

Data source: Backyard


This object is so faint, it is painful. After stacking 47 hours of Hα (188 x 900s) and 16.25 hours of OIII (65 x 900s), I tried and failed to complete an image. After a second failed attempt, I accepted as a lesson learned that my upstate NY sky is too bright and hazy for such a faint object. Then I started playing with the files while watching an old black & white movie on TCM. I was thinking about new technologies in cinematography and how they have redirected the art of making movies – for good and for bad. Perhaps it was the fresh perspective of a by-gone medium or simply trying not to do too much with my evening, but when the movie was over, my laptop showed an image that I chose not to reject.

CTB 1 is a supernova remnant (SNR) in the constellation Cassiopeia and a source of optical, radio, and X-ray emissions. A recent study reports that a pulsar was born from the supernova that produced CTB 1 and ejected into the galaxy, traveling at a velocity exceeding 1000 km/s.

The filaments in the lower left corner of my image may be related to a separate SNR.

In addition to Hα and OIII for the overall image, I collected RGB for the star colors.
I hope you like the result.




Sky plot

Sky plot


CTB 1 (Abell 85) Supernova Remnant,