Imaging telescopes or lenses: Sky-Watcher Esprit 100ED · William Optics FLT 132 Triplet APO f/7
Imaging cameras: ZWO ASI1600MM Cooled PRO
Mounts: Orion Atlas EQ-G
Guiding telescopes or lenses: Orion 50mm Guide Scope with helical focusing
Guiding cameras: Lacerta M-Gen II Autoguider
Focal reducers: William Optics Flattener 68III
Software: Adobe Lightroom CC · Photoshop CC · Main Sequence Software Sequence Generator Pro, v3.0 · Pleaides PixInsight Core 1.8
Filters: Astrodon OIII 3nm-31mm · Astrodon SII 3nm-31mm · Astrodon Ha 3nm-31mm
Dates:July 19, 2019 , Aug. 7, 2019 , Aug. 9, 2019 , Aug. 10, 2019 , Aug. 11, 2019 , May 24, 2020 , May 25, 2020 , June 17, 2020
Frames:
Astrodon Ha 3nm-31mm: 195x180" (gain: 139.00) -15C bin 1x1
Astrodon Ha 3nm-31mm: 220x180" (gain: 200.00) -15C bin 1x1
Astrodon OIII 3nm-31mm: 114x180" (gain: 139.00) -15C bin 1x1
Astrodon SII 3nm-31mm: 79x180" (gain: 139.00) -15C
Integration: 30.4 hours
Darks: ~50
Bias: ~50
Avg. Moon age: 10.61 days
Avg. Moon phase: 49.66%
Bortle Dark-Sky Scale: 4.00
Astrometry.net job: 3628219
RA center: 20h 25' 56"
DEC center: +40° 26' 48"
Pixel scale: 0.862 arcsec/pixel
Orientation: -39.651 degrees
Field radius: 0.466 degrees
Resolution: 3107x2349
Locations: Monterey Pines Observatory, Monterey, California, United States
Data source: Backyard
Just south of Sadr, in the Gama Cygni Nebula, is IC 1318, the Butterfly Nebula. The body of the butterfly is a dark lane of dust, LDN 889, that bisects the colorful emission nebula that creates the butterfly wings. This image is the northern wing of the butterfly, IC 1318 C, a concentration glowing hydrogen, oxygen, and sulfur with of channel dark dust perforating the center of the mass.
This image combine data collected over two years with two different OTA’s (both with the same camera, ZWO ASI1600MM Pro). In 2019 I collect 19.6 hours of Ha, OIII, and SII using at SW Esprit 100 (FL 550mm), and in 2020 I collected 12.6 hours of Ha using a WO FLT 132 (FL 925mm). In this rendition I used the 2019 data for color mapping, and used both the 2019 and 2020 Ha data to create a master luminance. The FOV of the 925mm OTA was used for framing (1.2 degrees X 0.8 degrees).
Here is a link to the original 2019 Butterly Nebula image (IC 1318).
https://www.astrobin.com/420891/?nc=user
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