NGC 7023  -  Iris Nebula

Full resolution (1600x1200 px  257kB)

Object data

Object type: open cluster + reflection nebula
Size: 18'
Magnitude: 7 mag
Constellation: Cep
Distance: 900 Ly

Exposure data

Date: 2005-10-27 + 2005-10-28
Location: Schlierbach / Austria (400m)
Telescope: TeleVue NP101 (4" Apo f=540mm)
Camera: ST2000XM with CFW8 and SBIG Filters
  Binning: L 1x1  /   RGB 2x2
  Exposure time: L 12x12m / R 6x10m / G 6x5m / B 6x5m
Exposure time total: L 2h 24min    /   RGB 2h 00min

very foggy weather conditions