M57 from last night

[andrewsscope]

Hi all I took this last night with my Skywatcher 80ed with 183c camera,this was my first time guiding with the scope.I managed 50 seconds of 60 images and stacked using dss,managed to stack 50 minutes.I processed in Adobe and affinity and also managed to capture Beta Lyrae (Sheliak) is an easily located third magnitude star southeast of Vega, marking the southwest corner of the skewed rectangular pattern of Lyra. Sheliak is an example of an eclipsing binary star - twin stars which are so close together that no telescope can see them as a pair, but that betray their nature by blocking out one another's light as they circle each other. Sheliak swings between magnitudes 3.4 and 4.1 in a cycle of just 12.9 days; both of the stars involved are hot blue giant suns, several thousand times brighter than our own. Beta Lyrae can be compared in binoculars with Gamma Lyrae, 1.7 degrees to its east - Gamma is a steady magnitude 3.25; at maximum, the stars are nearly equals - at minimum, Sheliak is significantly the fainter of the two. Sheliak apparently is not just a double star, but a multiple; the two telescopic field stars at 47 and 86 arc seconds (magnitudes 7 and 9, respectively) seem to be members of this amazing star system...and the 7th magnitude companion is apparently also a double star. Sheliak is thus a quintuple, or five-star, system! Sheliak is approximately 800 light years away.I thought I would Share.Thanks for looking.

[messier 111]

nice thx .

[Greenman]

Hi Andrew, looking good, you may want to try stacking in affinity, it now handles FITS and seems to work quite well.