M2 (NGC 7089) Globular Cluster in Aquarius, 


            Barry Brook

M2 (NGC 7089) Globular Cluster in Aquarius

Technical card

Imaging telescopes or lenses: Orion ED80T CF

Imaging cameras: Orion StarShoot G3 Mono CCD

Mounts: Skywatcher AZ EQ-6 GT

Guiding telescopes or lenses: Skywatcher SW120 F5 refractor

Guiding cameras: ZWO optical ASI120MM-S

Focal reducers: TeleVue 0.8x Photo Reducer/Flattener TRF-2008

Software: Cartes du Ciel  ·  Nebulosity 3  ·  EQASCOM  ·  StarTools  ·  Metaguide v5.1.7  ·  AstroTortilla 0.7

Filters: ZWO optical ZWO RGBL Filters

Dates:Aug. 1, 2014

Frames:ZWO optical ZWO RGBL Filters: 50x180" (2h 30') 1C

Integration: 2h 30'

Darks: ~25

Flats: ~100

Bias: ~100

Avg. Moon age: 5.00 days

Avg. Moon phase: 25.70%

Bortle Dark-Sky Scale: 6.00

Mean FWHM: 1.20

Temperature: 6.00

Basic astrometry details

Astrometry.net job: 349642

Resolution: 620x477


M2 is about 37,500 light years from Earth, and spans 175 light years of space. Containing more than 150,000 stars, it is one of the largest globular clusters known.

26 x Luminance

8 x Red

8 x Green

8 x Blue

All unbinned. Flats taken with light box, darks applied as a bad pixel map.



M2 (NGC 7089) Globular Cluster in Aquarius, 


            Barry Brook