NGC 6633

Full resolution (1600x1200 px  265kB)

Object data

Object type: open cluster (III 2 m)
Size: 27'
Magnitude: 4.6 mag
Constellation: Oph
Distance: 1,100 Ly

Exposure data

Date: 2005-05-27/28
Location: Schlierbach / Austria (400m)
Telescope: TeleVue NP101 (4" Apo f=540mm)
Camera: ST2000XM with CFW8 and SBIG Filters
  Binning: RGB 1x1
  Exposure time: R 9x4m / G 9x2m / B 9x2m
Exposure time total: RGB 72 min
Notes: bright moonlight during exposure