vdB139: Iris Nebula in Cephus

Imaged on 08/02/08
Scope: Takahashi FSQ106N
Mount: Losmandy G-11
Camera: ST-10XME

CFW9 with Astrodon e-series filters
Exposures: RGB 20 min ea; Lum 35 min
Site: Palomar Mountain
Conditions: 64 degrees, no wind, excellent seeing

This reflection nebula is powered by a young hot Be star (HD200775). The region includes the cluster NGC7023 and several dark nebula designated as LDN487 and LDN1167-1174. Located 1400 ly away.