NGC 281, affectionately referred to as the Pacman Nebula, is an emission nebula at an estimated distance of ~9200 light years, in the constellation of Cassiopeia. Equipment: ZWO ASI1600MM-C Camera @ -20C and Gain:200 Offset:50 Software Bisque MyT Mount Stellarvue SVQ100 Astrograph Refractor, 580mm @ f/5.8 Innovations Foresight ONAG Software: Pixinsight Commercial Version 1.8 Lightroom CC Photoshop CC Innovations Foresight SkyGuard Light Frames: Ha: 41 x 360 secs ( 4 hrs 6 mins) OIII: 37 x 360 secs (3 hrs 42 mins) SII: 40 x 360 secs (4 hrs) Red: 24 x 30 secs (12 mins) Green: 22 x 30 secs (11 mins) Blue: 23 x 30 secs (11 mins 30 secs) 12 hrs 22 mins 30 secs total Dark Frames: 10 x 60 secs, RGB (30 mins) 10 x 360 secs, Ha,OIII,SII (3 hrs) Bias Frames 100 Flat Frames 20 each filter More details from 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,[3] spanning over a larger area of 40 arcmin.[4] 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.[5] Colloquially, NGC 281 is also known as the Pacman Nebula for its resemblance to the video game character. Edward Emerson Barnard discovered the nebula in August 1883, describing 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.
This is the Fishhead Nebula (IC 1795), an energetic star forming region shaped like a fish, which is part of the larger Heart Nebula. This is mixed in a modified SHO palette. Melotte 15 is also seen in the upper portion slightly left of center. Equipment: ZWO ASI1600MM-C Camera @ -20C and Gain:200 Offset:50 Software Bisque MyT Mount Stellarvue SVQ100 Astrograph Refractor, 580mm @ f/5.8 Innovations Foresight ONAG Software: Pixinsight Commercial Version 1.8 Lightroom CC Photoshop CC Innovations Foresight SkyGuard Light Frames: Ha: 50 x 360 secs ( 5 hrs) OIII: 51 x 360 secs (5 hrs 6 mins) SII: 49 x 360 secs (4 hrs 54 mins) Red: 30 x 30 secs (15 mins) Green: 30 x 30 secs (15 mins) Blue: 31 x 30 secs (15 mins 30 secs) 15 hrs 45 mins 30 secs total Dark Frames: 10 x 60 secs, RGB (30 mins) 10 x 360 secs, Ha,OIII,SII (3 hrs) Bias Frames 100 Flat Frames 20 each filter
IC1795, the Fishhead Nebula, is an aptly named emission nebula that is often imaged as part of the larger Heart Nebula. It is a star forming region in the northern constellation Cassiopeia. This version shows off the conventional Hubble or SHO palette, where the colors are mapped as follws: S - imaged with the SII filter, to Red H - imaged with the H-a filter, to Green O - imaged with the OIII filter, to Blue In addition to the Fishhead, a portion of Melotte 15, in the center of the larger Heart Nebula, appears in the upper left of center portion of this image. Equipment: ZWO ASI1600MM-C Camera @ -20C and Gain:200 Offset:50 Software Bisque MyT Mount Stellarvue SVQ100 Astrograph Refractor, 580mm @ f/5.8 Innovations Foresight ONAG Software: Pixinsight Commercial Version 1.8 Lightroom CC Photoshop CC Innovations Foresight SkyGuard Light Frames: Ha: 50 x 360 secs ( 5 hrs) OIII: 51 x 360 secs (5 hrs 6 mins) SII: 49 x 360 secs (4 hrs 54 mins) Red: 30 x 30 secs (15 mins) Green: 30 x 30 secs (15 mins) Blue: 31 x 30 secs (15 mins 30 secs) 15 hrs 45 mins 30 secs total Dark Frames: 10 x 60 secs, RGB (30 mins) 10 x 360 secs, Ha,OIII,SII (3 hrs) Bias Frames 100 Flat Frames 20 each filter
