The Iris Nebula (also known as NGC 7023 or Caldwell 4) is a bright reflection nebula located about 1,300 light years from Earth in the constellation of Cepheus. It is six light-years across. The nebula is illuminated by a magnitude +7.4 star designated HD 200775. It is six light-years across. The nebula was discovered in 1794 by Sir William Herschel, a astronomer, where it was then added to the New General Catalogue (NGC).
Object Designations: NGC2403
Also known as: (none)
Constellation: Camelopardalis
Object Type: flocculent spiral galaxy
Distance: 9.7 million light-years away
Magnitude: 8.9
Discovery: William Herschel
Telescope: Apertura CarbonStar 200 Imaging Newtonian 800mm / F4
Camera: ZWO ASI2600 MC Pro – No Filter
Mount: Celestron AVX – With CPWI Software
Guiding: Apertura 32mm Guide Scope with a ZWO ASI120MM Camera and PHD2
SharpCap Imaging Software
Processing Software
AstroSharp Ltd SharpCap
Pleiades Astrophoto PixInsight
Russell Croman Astrophotography BlurXTerminator
Russell Croman Astrophotography NoiseXTerminator
Russell Croman Astrophotography StarXTerminator
Stanley Dimant EZ Processing Suite
This final image is:
111 – 90 second subs at 100 gain, no filter
White Bal (B) = 98
White Bal (R )= 80
Brightness = 12
Camera Temperature = -26
Last Plate Solve Data = Plate solve result was RA=21:01:53.8,Dec=+68:15:01 with mount at RA=21:01:53.8,Dec=+68:15:01, FOV 1.557×1.041 degrees, up is 239.36 degrees East of North
