Sh2-129 in Cepheus

Click on the image for a high res version. MOUSE OVER for H-alpha only. Look also to the H-alpha only hires.

Sh2-129 is a faint nebula only 4° West of IC1396. This image frames only the "brightest" part. In the past I've imaged this nebula with nearly half of the focal length and my Schmidt camera, see here, I think the new one is much better!
image is an Ha-RGB composition, with most of the exposure focused on H-alpha emission (12h30min) and only a few RGB (2h). Be sure to look not only to the color version but also to the black and white Ha only version.

Technical Data
Optics TEC 140
Focal Length
1011 mm
Focal Ratio f/7.2
Exposure Time Total 14 h 30 min, composed of Ha 12 h 30 min, RGB 40:40:40 min (single exp of 30 min for Ha, 10 min for RGB)
CCD SBIG STL-11000M @-30°C
Location Saint Barthelemy (AO, Italian Alps) at 1660 m height
26-27 September 2014 (two nights)
Mount Gemini G-41
Tracking Lodestar on an 80mm f/5 refractor
Temperature and humidity T= from +4 to +10 °C, RH= from 65 to 100%
Sky brightness at zenith (with SQM-L) 21.1 mag/arcsec^2
Notes Imaged during the Saint Barthelemy Star Party 2014; this image won the third prize in the astrophotograpy contest of the star party!

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