Tuesday, 28 October 2008

The Iris Nebula...

Object: NGC 7023, Caldwell 4
Type: Reflection Nebula
Distance: 1400 light years
Constellation: Cepheus
Date: 27 October 2008
Equipment: SXV-H9, Vixen ED114 refractor (f.l. 600mm)
Subframes: 25 x 100 second 2x2 binned subframes, 16 darks, 16 flats/flat darks, calibrated and stacked in AIP4Win.

Visible through the eyepeice as a mere fuzzy star, this image shows the clover-shaped outer area of dusty obscuring matter that surrounds the bright reflection zone. For some reason, the false colour image below seems to emphasise this slightly better (click on either to enlarge).

Rob Gendler shows us a much deeper and more detailed image here, and also provides a nice chunk of information about this fascinating object.

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