Imaging telescopes or lenses: Orion ED80T CF
Imaging cameras: Sony NEX-3 DSLR
Mounts: Skywatcher AZ EQ-6 GT
Guiding telescopes or lenses: Skywatcher SW120 F5 refractor
Guiding cameras: Orion StarShoot G3 Mono CCD
Focal reducers: TeleVue 0.8x Photo Reducer/Flattener TRF-2008
Software: Cartes du Ciel · Nebulosity 3 · Stark Labs PHD2 v2.2.2g · EQASCOM · StarTools 1.3.5.286
Dates:July 29, 2014
Frames: 30x180" ISO800
Integration: 1.5 hours
Darks: ~11
Flats: ~100
Bias: ~100
Avg. Moon age: 2.28 days
Avg. Moon phase: 5.79%
Bortle Dark-Sky Scale: 6.00
Mean FWHM: 2.05
Temperature: 7.00
Astrometry.net job: 339153
RA center: 18h 30' 57"
DEC center: -19° 3' 46"
Orientation: -89.157 degrees
Field radius: 2.098 degrees
Resolution: 620x411
M25 is an Open Cluster at a distance of about 2,000 light-years away from Earth, spanning about 19 light years across. It is nestled in the rich star fields of Sagittarius, towards the heart of the Galaxy.
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