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
The Lion Nebula is estimated to be between 10,000 - 12,000 light-years away, in the constellation Cepheus. A wider FOV or a camera rotator would have allowed me to get the entire nebula in view, but the resemblance is still visible in this rotated and cropped version I think. It is an extensive emission nebula, with a distinctive 'searchlight' feature that appears to emanate from within the red region of this image. The red areas are primarily due to ionized Hydrogen emission and the Blue regions to OIII emission in this bicolor version. 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: Hα: 35 x 360 secs ( 3 hrs 30 mins) OIII: 32 x 360 secs (3 hrs 12 mins) Red: 13 x 30 secs (6 mins 30 secs) Green: 14 x 30 secs (7 mins) Blue: 11 x 30 secs (5 mins 30 secs) 7 hrs 01 mins total Dark Frames: 10 x 60 secs, RGB (30 mins) 10 x 360 secs, Ha,OIII (2 hrs) Bias Frames 100 Flat Frames 20 each filter
