Contains: M 55, NGC 6809
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NGC6809 (M55)

Technical card

Resolution: 4923x3256

Dates: Nov. 13, 2017

Frames: 25x15" ISO1600 30C

Integration: 0.1 hours

Darks: ~10

Flats: ~20

Bias: ~10

Avg. Moon age: 24.81 days

Avg. Moon phase: 23.15%

Bortle Dark-Sky Scale: 6.00

Temperature: 26.00

Astrometry.net job: 1815412

RA center: 294.962 degrees

DEC center: -30.947 degrees

Pixel scale: 0.525 arcsec/pixel

Orientation: 250.579 degrees

Field radius: 0.431 degrees

Locations: Home , SAO PAULO, Brazil

Description

Image captured with a Skywatcher Mak180 using a Celestron 6,3 Reducer/Corrector. Image camera was a Canon T3i mod. No filters used. 2" camera to telescope adapter. 25 frames of 15”. Darks, Bias and Flats used.

Located some 17,300 light years from planet Earth and spanning nearly 100 light years in diameter, this loose appearing ball of stellar points may not seem concentrated – but its home to tens of thousands stars.

Messier 55 (também conhecido como NGC 6809 ou M55) é um aglomerado globular localizado na constelação de Sagittarius a 17 300 anos-luz da Terra. Foi descoberto por Nicolas Louis de Lacaille em 1752. Possui um raio de 50 anos-luz e uma dimensão aparente de 19 minutos de arco.

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Author

Brenner Alves Dam...
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NGC6809 (M55), Brenner Alves Damaceno