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Name / Constellation

NGC 7023

Other:  LBN487, Caldwell 4, Iris Nebula

Cep

Coordinates AR: 21h 01m 35.60s - Dec: +68° 10′ 10.0"
Optics Takahashi FSQ 106N APO Fluorite F5 - 60/220 guiding refractor
Camera-Mount SBIG STF8300M - Orion StarShot Guider - 10Micron GM2000 QCI Mount
Filters Baader LRGB
Exposure
  • Luminance
  • Red
  • Green
  • Blue
  • 7 x 900 sec - 1 hour 45 min
  • 6 x 600sec - 1 hour
  • 6 x 600 sec - 1 hour
  • 6 x 600 sec - 1 hour
  • UNBINNED
  • BINNING 2X2
  • BINNING 2X2
  • BINNING 2X2
Location / Date Promiod (Valle D'Aosta-Italy) "TLP" Remote Observatory - 12 sept 2018
Seeing About 2.4 " @ 2.1 arcosec/pixel unbinned
Note  
Acquisition MaxIm DL - CCD Autopilot 5
Processing Adobe Photoshop CS5 -
Comment

The Iris Nebula, also known as NGC 7023 and Caldwell 4, is a bright reflection nebula and Caldwell object in the constellation Cepheus. NGC 7023 is actually the cluster within the nebula, LBN 487, and the nebula is lit by a magnitude +7 star, SAO 19158. It shines at magnitude +6.8. It is located near the Mira-type variable star T Cephei, and near the bright magnitude +3.23 variable star Beta Cephei (Alphirk). It lies 1,300 light-years away and is six light-years across.