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 R Gen 2 E-series 31mm · Astrodon G Gen 2 E-series 31mm · Astrodon B Gen 2 E-series 31mm · Astrodon OIII 3nm-31mm · Astrodon SII 3nm-31mm · Astrodon Ha 3nm-31mm
Dates:Oct. 4, 2018 , Oct. 6, 2018 , Oct. 7, 2018 , Oct. 8, 2018 , Oct. 11, 2018 , Oct. 23, 2019 , Oct. 24, 2019
Frames:
Astrodon B Gen 2 E-series 31mm: 35x60" (gain: 139.00) -15C bin 1x1
Astrodon G Gen 2 E-series 31mm: 36x60" (gain: 139.00) -15C bin 1x1
Astrodon Ha 3nm-31mm: 261x180" (gain: 139.00) -15C bin 1x1
Astrodon Ha 3nm-31mm: 211x180" (gain: 200.00) -15C bin 1x1
Astrodon OIII 3nm-31mm: 106x180" (gain: 139.00) -15C bin 1x1
Astrodon R Gen 2 E-series 31mm: 35x60" (gain: 139.00) -15C bin 1x1
Astrodon SII 3nm-31mm: 100x180" (gain: 139.00) -15C bin 1x1
Integration: 35.7 hours
Darks: ~30
Bias: ~50
Avg. Moon age: 22.81 days
Avg. Moon phase: 13.38%
Bortle Dark-Sky Scale: 4.00
Astrometry.net job: 3067324
RA center: 2h 27' 48"
DEC center: +61° 57' 41"
Pixel scale: 0.862 arcsec/pixel
Orientation: -117.784 degrees
Field radius: 0.598 degrees
Resolution: 3983x3011
Locations: Monterey Pines Observatory, Monterey, California, United States
Data source: Backyard
The Fishhead Nebula is a knot of gas and dust on the western edge of the Heart Nebula (IC 1805). This bright nebula is 7,500 light years away, located in the Perseus Arm of our Milky Way Galaxy. The object is dominated by dust and hydrogen gas, with good measures of oxygen and sulfur gas.
In October 2018 I collect 25.1 hours of Ha, OIII, SII, and RGB data for a wide view of this region (1.84 degrees X 1.39 degrees) using a SW Esprit 100ED (https://www.astrobin.com/372144/D/). This year I collected an additional 10.6 hours of Ha data with a tighter FOV (1.09 degrees X 0.83 degrees) using a WO FLT132. In this image, I combined the two data sets using the new, tighter FOV data to create a luminance mask to produce a cropped version of the original 2018 image.
| SF Bay Area Imagers |
| ZWO ASI1600MM/QHY163M |
| Suburban Astrophotography |
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