DSLR astrophotography by Sergi Verdugo
The Iris Nebula (NGC7023)
Exposure: 20×600″ @ ISO 800
Telescope: Skywatcher Newton 8″ f5 with Baader MPCC
Filter: Hutech IDAS LPS 2″
Mount: Skywatcher EQ6 Pro
Camera: Amp-off Modded & Cooled Canon 350D
Date: 10th July 2010
Location: Coll de Jou (Barcelona, Spain)
Comments: Initially I had planned to take 5 hours of exposure of this object, but I lost the last exposures I took due to a failure in the camera which I don’t know yet why ocurred. Despite that, I’m satisfied with the result, but I’d like to try this object again in the future with much more exposure.
The Iris Nebula, also known as NGC7023, is a bright reflection nebula in the constellation Cepheus that lies 1300 light-years away from the Earth. NGC 7023 actually refers to the cluster within the nebula, while the correct designation for the nebula is LBN 487. The nebula reflects the light from the central magnitude 7 star, SAO 19158. The reflection nebula is surrounded by inmense clouds of dust that absorb the light coming from the stars behind them.