Uploaded 30-Sep-11
Taken 30-Sep-11
Visitors 148

12 of 31 photos
Photo Info

Dimensions1024 x 731
Original file size278 KB
Image typeJPEG
Color spaceUncalibrated
NGC7023 - The Iris Nebula

NGC7023 - The Iris Nebula

Date: 9/29/2011
Target: NGC 7023 - The Iris Nebula
Orion 8" f/4.9
Multi-Purpose Coma Corrector
JMI EV-1n Focuser
Resurfaced: Spectrum Coatings Max "R" (EAL)
Camera: Canon 40D (modified, cooled to 36F)
Filter: IDAS LPS
Exposures: 79x240s (5.2h) @ ISO1600
Framing: North is Up, 60% crop,
Center(RA/Dec): (315.990, 68.248)
FOV: 0.465 deg
Location: Mocksville, NC
Seeing: 4/5
Transparency: 4/5
Ambient Temp: 50F
Camera Temp: 39F
Dark Noise (StdDev): 372
Start Time: 9:30PM
End Time: 5:00AM
Captured with Nebulosity, stacked using DeepSkyStacker, processed in Photoshop.

Winner - Digital_Astro Yahoo! Group September 2011 Nebula Challenge

From Wikipedia:

The Iris Nebula, also NGC 7023 and Caldwell 4, is a bright reflection nebula and Caldwell object in the constellation Cepheus. NGC 7023 is actually the cluster within the nebula, LBN 487, and the nebula is lit by a magnitude +7 star, SAO 19158. It shines at magnitude +6.8. It is located near the Mira-type variable star T Cephei, and near the bright magnitude +3.23 variable star Beta Cephei (Alphirk). It lies 1,300 light-years away and is six light-years across.