NGC 281 - Sh2-184 - IC 11 - Pacman Nebula - 2 Telescope Combo (Uwe Deutermann)

NGC 281 - Sh2-184 - IC 11 - Pacman Nebula - 2 Telescope Combo

This was a test that I wanted to do for a long time, and I finally had some time for it. I wanted to find out if a lesser quality non APO refractor works well in narrow band. The result shows that indeed the typical blue halos around the stars are not as prominent, maybe not even much worse than the Explore Scientific APO that I own. I definitely will get back to my 6" non-APO in spring for galaxy season. With 1200mm focal length it might work very well for those smaller targets.

Combined data from the Explore Scientific into this image.

Wikipedia: NGC 281, IC 11 or Sh2-184 is a bright emission nebula and part of an H II region in the northern constellation of Cassiopeia and is part of the Milky Way's Perseus Spiral Arm. This 20×30 arcmin sized nebulosity is also associated with open cluster IC 1590, several Bok globules and the multiple star, B 1. It collectively forms Sh2-184, spanning over a larger area of 40 arcmin. A recent distance from radio parallaxes of water masers at 22 GHz made during 2014 is estimated it lies 2.82±0.20 kpc. (9200 ly.) from us. Colloquially, NGC 281 is also known as the Pacman Nebula for its resemblance to the video game character.

E. E. Barnard discovered this nebula in August 1883, who described it as "a large faint nebula, very diffuse." Multiple star 'B 1' or β 1 was later discovered by S. W. Burnham, whose bright component is identified as the highly luminous O6 spectral class star, HD 5005 or HIP 4121. It consists of an 8th-magnitude primary with four companions at distances between 1.4 and 15.7 arcsec. There has been no appreciable change in this quintuple system since the first measures were made in 1875.

Original
Final
B

B

Description: Another learning session with PI. Integrated the images from the AVX 6" with the images of the Explore Scientific APO into 1.

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Narrowband imaging
ZWO ASI1600MM/QHY163M

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