NGC7822

NGC 7822 is a young star forming complex in the constellation of Cepheus. The complex encompasses the emission region designated Sharpless 171, and the young cluster of stars named Berkeley 59. The complex is believed to be some 3000 light years distant, with the younger components aged no more than a few million years. The complex also includes one of the hottest stars discovered within 1 kpc of the Sun, an eclipsing binary system that exhibits a surface temperature of nearly 45000 K and a luminosity ~100000 times that of the Sun. The star is one of the primary sources illuminating the nebula and shaping the complex's famed pillars of creation-type formations, the elephant trunks. (Wikipedia)

 

This image was taken over two nights from a flat roof in light polluted London. Forums on the Internet advised against setting up on a flat roof due to heat currents and vibrations but even with 30 minute subs, I did not experience any issues. Only a few bright stars were visible in the sky so very pleased with the result using narrowband filters.

 

Narrowband image: 2,4/10/15

Chiswick, London, UK

7.6 Hours Total Exposure

10x1800s Ha

4x1200s SII, 4x1200s OIII

(SII and OIII bin 2x2)

 

Equipment:

T: Takahashi FSQ106ED at f/5

C: QSI683ws Mono CCD (-25C), Astronomik Filters (6nm Ha)

M: Celestron Advanced Vx

G: QHY5-II

 

Acquisition and Processing:

PHD2, Sequence Generator Pro, CCDStack2, Photoshop CS6

Done