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Hemisphere:  Northern  ·  Contains:  NGC 281
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NGC 281 PacMan Nebula in HOO, 


            Ryan Kinnett
NGC 281 PacMan Nebula in HOO
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NGC 281 PacMan Nebula in HOO

Technical card

Imaging telescopes or lenses: GSO 10" f/4 Imaging Newtonian

Imaging cameras: ZWO ASI1600MM-Cool

Mounts: SkyWatcher EQ6-R Pro

Guiding telescopes or lenses: Orion 60mm Guide Scope

Guiding cameras: Orion Starshoot AutoGuider

Software: KStars Ekos/INDI  ·  Photoshop CC  ·  DeepSkyStacker

Filters: ZWO 1.25" Ha  ·  ZWO 1.25" O-III

Accessory: GSO 2" Coma Corrector

Dates:Oct. 3, 2019

ZWO 1.25" Ha: 12x300" (gain: 139.00) -10C
ZWO 1.25" O-III: 4x300" (gain: 139.00) -10C
ZWO 1.25" O-III: 8x300" (gain: 300.00) -10C

Integration: 2.0 hours

Flats: ~25

Bias: ~25

Avg. Moon age: 5.23 days

Avg. Moon phase: 27.85%

Bortle Dark-Sky Scale: 6.00

Temperature: 20.00

Basic astrometry details job: 2976128

RA center: 0h 52' 51"

DEC center: +56° 37' 22"

Pixel scale: 0.692 arcsec/pixel

Orientation: 173.868 degrees

Field radius: 0.501 degrees

Resolution: 4071x3266

Locations: Home, La Crescenta, California, United States

Data source: Backyard


This year I'm surveying DSOs with as much exposure as I can get on each in a single night. Got a late start on this particular night and was slowed down by transient issues. Also, I made a mistake in EKOS and set the camera gain to 300 ADU while re-focusing mid-session, and neglected to set the gain back to unity, hence star bloat and crispy noise.



Ryan Kinnett
License: None (All rights reserved)

Sky plot

Sky plot


NGC 281 PacMan Nebula in HOO, 


            Ryan Kinnett