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Supernova remnant CTA 1 in HaOiiiRGB

Technical card

Resolution: 4082x4066

Astrodon 5nm Ha: 64x1800"
Astrodon 5nm Oiii : 70x1800"
Astrodon B Gen.2 E-series: 12x300"
Astrodon G Gen.2 E-series: 9x300"
Astrodon R Gen.2 E-series: 12x300"

Integration: 69.8 hours job: 1881486

RA center: 1.650 degrees

DEC center: 72.780 degrees

Pixel scale: 1.260 arcsec/pixel

Orientation: 2.010 degrees

Field radius: 1.009 degrees


CTA 1 is a very dim supernova remnant in Cepheus.

The bright object at about 8 o'clock is the unrelated planetary nebula NGC 40.

I had a look for PSR J0007+7303, the first ever high magnetic field pulsar to be discovered through its gamma-ray pulsations, but it didn't appear to be visible optically.

Acquisition credit: Scott Johnson, Augusto Hernandez, John Kasianowicz, Daniele Malleo, Jose Mtanous and Rick Stevenson

Processing credit: Rick Stevenson

Target suggestion: Sakib Rasool



Rick Stevenson

Sky plot

Sky plot


Supernova remnant CTA 1 in HaOiiiRGB, 


            Rick Stevenson

In these public groups

Narrowband imaging