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Contains:  Ring nebula in Lyra, M 57, NGC 6720, IC 1296
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M57 - Ring Nebula, 





    
        

            Claus
M57 - Ring Nebula

M57 - Ring Nebula

Technical card

Imaging telescope or lens:Newton Telescope NK900 (1040mm)

Imaging camera:Canon EOS 600d

Focal reducer:TeleVue Paracorr Type 2

Software:Photoshop CS6

Accessories:Lacerta MGEN AutoguiderLacerta OAG

Resolution: 1920x1200

Dates:Aug. 8, 2013

Frames: 18x300" ISO800

Integration: 1.5 hours

Darks: ~10

Flats: ~10

Bias: ~10

Avg. Moon age: 1.48 days

Avg. Moon phase: 2.45%

Bortle Dark-Sky Scale: 1.00

Mean FWHM: 2.00

Temperature: 14.00

Astrometry.net job: 90539

RA center: 283.395 degrees

DEC center: 33.005 degrees

Pixel scale: 2.295 arcsec/pixel

Orientation: -47.906 degrees

Field radius: 0.722 degrees

Locations: Emberger Alm, Austria, Emberger, Alm, Kärnten, Austria

Description

The Ring Nebula (Messier 57, or NGC 6720) is an planetary nebula in the constellation Lyra.

The nebula is the remnant of a star that has shed its outer shell of gas around 20,000 years ago. The gas envelope extends at a speed of 19 km / s and currently has an apparent diameter of about 118 arc seconds, which means an absolute diameter of about 1.3 light years at a distance of 2,300 light years. In a telescope the nebula appears as a ring.

In the center of the nebula is a white dwarf star with a surface temperature of about 70,000 ° C and an apparent magnitude of 15.8 is like.

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Claus
Claus
License: None (All rights reserved)
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M57 - Ring Nebula, 





    
        

            Claus