The Crescent Nebula (NGC6888) is an emission nebula in the constellation Cygnus, here imaged in narrowband. A large and energetic Wolf-Rayet star that is shedding material via its solar wind. The shock waves of the material traveling at differing speeds heats the gases and causes them to radiate. The star is burning through its fuel and will likely end its life in a supernova explosion. 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: 30 x 360 secs ( 3 hrs) OIII: 29 x 360 secs (2 hrs 54 mins) SII: 25 x 360 secs (2 hrs 30 mins) Red: 15 x 60 secs (15 mins) Green: 13 x 60 secs (13 mins) Blue: 11 x 60 secs (11 mins) 9 hrs 3 mins 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
M106 is joined by a number of other galaxies in this widefield view. 6 NGC galaxies in addition to a large number of small PGC objects can be found in the frame. The largest 3 in addition to M106 (top left center), are the edge on galaxy NGC 4217 (bottom edge), NGC 4220 (right edge), and NGC 4248 (closest to M106). Equipment: ZWO ASI1600MM-C Camera @ -15C and Gain:0 Offset:10 Software Bisque MyT Mount Stellarvue SVQ100 Astrograph Refractor, 580mm @ f/5.8 Software: Pixinsight Commercial Version 1.8 Lightroom CC Photoshop CC Light Frames: Luminance: 205 x 30 secs (1 hr 42 mins 30 secs) Red:111 x 60 secs (1 hr 51 mins) Green:105 x 60 secs (1 hr 45 mins) Blue: 105 x 60 secs (1 hr 45 mins) 7 hrs 3 mins total Dark Frames: 10 x 30 secs, RGB (5 mins) 10 x 60 secs, Luminance (10 mins) Bias Frames 60 Flat Frames 10 each filter More M106 Details from Wikipedia: Messier 106 (also known as NGC 4258) is an intermediate spiral galaxy in the constellation Canes Venatici. It was discovered by Pierre Méchain in 1781. M106 is at a distance of about 22 to 25 million light-years away from Earth. M106 contains an active nucleus classified as a Type 2 Seyfert, and the presence of a central supermassive black hole has been demonstrated from radio-wavelength observations of the rotation of a disk of molecular gas orbiting within the inner light-year around the black hole.
This is another narrowband image, this time color blended to give a more 'natural' color palette. The Swan or Omega Nebula is a bright region that is very active in Ha, OIII, and SII emissions. This is the first image whose data was entirely captured using the Innovations Foresight ONAG for guiding and focusing. 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 - 33 x 360 secs (3 hrs 18 mins) SII - 41 x 360 secs (4 hrs and 6 mins) Red: 21 x 30 secs (10 mins 30 secs) Green: 22 x 30 secs (11 mins) Blue: 21 x 30 secs (10 mins 30 secs) 12 hrs 2 mins total Dark Frames: 10 x 60 secs (20 mins) Bias Frames 60 Flat Frames 20 each filter More Details From Wikipedia: The Omega Nebula, also known as the Swan Nebula, Checkmark Nebula, and the Horseshoe Nebula[1][2] (catalogued as Messier 17 or M17 or NGC 6618) is an H II region in the constellation Sagittarius. It was discovered by Philippe Loys de Chéseaux in 1745. Charles Messier catalogued it in 1764. It is located in the rich starfields of the Sagittarius area of the Milky Way. The Omega Nebula is between 5,000 and 6,000 light-years from Earth and it spans some 15 light-years in diameter. The cloud of interstellar matter of which this nebula is a part is roughly 40 light-years in diameter and has a mass of 30,000 solar masses.[3]
