Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  Omega nebula, M 17, NGC 6618
Getting plate-solving status, please wait...
M17 - Swan, Omega Nebula, 


            Chris Howard
M17 - Swan, Omega Nebula

M17 - Swan, Omega Nebula

Technical card

Resolution: 1024x723

Dates:June 16, 2018June 21, 2018

Baader OIII 8.5 nm 2": 42x300" bin 1x1
Optolong H-Alpha 7nm: 16x300"
Optolong H-Alpha 7nm: 82x120" -10C

Integration: 7.6 hours

Darks: ~20

Avg. Moon age: 5.77 days

Avg. Moon phase: 35.87%

Bortle Dark-Sky Scale: 4.00

Mean SQM: 20.62 job: 2116777

RA center: 275.182 degrees

DEC center: -16.186 degrees

Pixel scale: 4.628 arcsec/pixel

Orientation: 67.742 degrees

Field radius: 0.806 degrees

Locations: Home Observatory, North Hampton, New Hampshire, United States

Data source: Backyard


June 16, 2018 - It was narrowband time last night in the backyard. I took a couple hours of hydrogen-alpha (Ha) sub-exposures of M17, the Swan Nebula in the constellation Sagittarius. M17 is about 5,500 light-years away. It's also called the Omega Nebula, Checkmark Nebula, and sometimes the Horseshoe Nebula. I came back to M17 on the 21st, and took another 40 x 300 second subs in OIII. (M17 info: Ha 16 x 300 second + 82 x 120 second exposures + 20 dark frames, OIII 40 x 300 second exposures + 20 dark frames, stacked in DSS, William Optics ZS61, Atik 414EX mono CCD, 7nm Optolong 2" Ha filter, 8.5nm Baader 2" OIII filter, CEM25P EQ Mount, QHY5III178 guide cam with the Orion TOAG



Chris Howard
License: None (All rights reserved)

Sky plot

Sky plot


M17 - Swan, Omega Nebula, 


            Chris Howard