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PostPosted: Sat Sep 30, 2017 2:02 pm 
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Joined: Mon Jan 09, 2006 11:05 am
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Location: Lancashire
After the long, light, summer evenings, the Autumnal constellations are always a welcomed sight. Yesterday evening, using an unusual combination of 16X50 and 20X50 binoculars on the homemade binocular mirror-mount, some of the sky objects viewed included the celebrated Double Cluster in Perseus ( strangely, not entered into Messier's catalogue ), several asterisms in Cassiopea, spiral galaxy M31 in Andromeda, open cluster M39 and the multiple star Albireo ( the orange component has a third dwarf companion ) in Cygnus.
While observing, someone's wandering cat persistently rubbed itself against my right leg. In cat language, it can mean "Feed me"; it's unlikely that the feline wanted to look through the binoculars.
As often happens at this time of year, it wasn't long before the night sky became shrouded in mist, ending the observing session.

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Last edited by brian livesey on Wed Oct 04, 2017 12:37 pm, edited 2 times in total.

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PostPosted: Sat Sep 30, 2017 3:16 pm 
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Joined: Sat Jan 26, 2008 4:03 pm
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Location: Galloway, SW Scotland
Oh, I never knew that Albireo had a third component, Brian; thanks for the info.

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PostPosted: Mon Oct 02, 2017 10:15 am 
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There's some controversy as to whether Albireo and its blue companion are physically bounded. The latter has an orbital period of 75,000 years: stars.astro.illinois.edu/sow/albireo.html .

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PostPosted: Tue Oct 03, 2017 8:20 am 
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Thanks, Brian.

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