Cygnus - The Swan
Pronounced 'Sig - Nuss'
Where to find the constellation
Constellation Chart
Cygnus is one of the 'busiest' constellations of all, mainly due to the fact that it straddles the Milky Way. Numerous clusters, and nebulae
make it one of the best areas in the Norther n sky to sweep with binoculars. Two Messier open clusters, several ngc-classified clusters,
the spectacular North American, Pelican, and Veil, nebulae, the 'blinking' planetary nebula, and perhaps THE showpiece, colour contrasting double star - Albireo
North America, and Pelican nebulae
Situated right beside each other, near Deneb. ngc7000, the North America nebula is so-called because it is actually shaped like the North American continent - visible in binoculars from VERY goos skies - a HUGE nebula, very difficult to see much of it in any telescope.
The Pelican nebula, also looks a little like it's name - smaller and dimmer than the N/A neb, much harder to spot visually
The pair are both shown far better photographically in this great image by Andy (Big Dipper)
The Veil Nebula
Supernova remnant - also covers a lot of area - so much in fact that it has more than one ngc designation - the right-most piece (ngc6960) is also known as the 'witches broom'
Widefield instrument, good sky, and preferably a nebula filter required to spot it visually
M29
Small, tight open cluster, near the bright star Sadr
M39
Larger than M29, and much more open, will fill the FOV at low powers
Several other open clusters - see the map - varying brightnesses and sizes - you can spend a whole night just hopping from one OC to the next in Cygnus.
The blinking Planetary (ngc6826)
A little off to the right of the main map - see finder chart below
Very small, may look like an out of focus star in a small scope - because it is a diffuse nebula though, it will only be easily seen with averted vision - if you look directly at it, it will appear dramatically dimmer, maybe even disappear. Look slightly away, and it will re-appear.
This is why it gets it's name
Double stars
Albireo
Back in Elizabethan days, double stars were the 'trendy' thing for 'Gentlemen astonomers' to observe. Many books were published, listing examples, and attempting to describe the colours, and Albireo was the real celebrity of double stars.
Yellow.Orange primary, with blue companion - magnitudes 3.2 and 5.4 - the colour contrast is really striking - and because it is a relatively 'wide' pairing, it can be seperated in any telescope (I've evn split it with 15x binocs)
61 Cygni
Two orange stars - slightly tighter than Albireo - magnitudes 5.5 and 6.4
I've only really scratched the surface here - There's a lot more to Cygnus for the persistent observer - Very rich area of the Milky Way - so many clusters merge with the millions of background stars - an awesome area to sweep through with a larger scope.
Cygnus NGCs (with magnitudes) - from my own "1200 Northern NGCs" list
For those with 'GoTo' or a good chart.
6764 - Gal - 11.9
6811 - OC - 6.8
6819 - OC - 7.3
6824 - Gal - 12.2
6826 - PN - 8.8 (Blinking Planetary)
6833 - PN - 13.8
6834 - OC - 7.8
6866 - OC - 7.6
6871 - OC - 5.2
6883 - OC - 8.0
6884 - PN - 12.6
6888 - Neb - 10.0 (Crescent Nebula)
6913 - OC - 6.6 (m29)
6946 - Gal - 8.8
6960 - Neb - 7.0 (Veil - part) - aka, the Witches Broom
6992 - Neb - 7.0 (Veil - part)
6995 - Neb - 7.0 (Veil - part)
7000 - Neb - 4.0 (North America Nebula)
7008 - PN - 12.0
7013 - Gal - 11.3
7026 - PN - 12.0
7027 - PN - 9.6
7039 - OC - 7.6
7048 - PN - 11.0
7062 - OC - 8.3
7063 - OC - 7.0
7082 - OC - 7.2
7086 - OC - 8.4
7092 - OC - 4.6 (m39)