The Cygnus Region
The summer constellation!
By Gilbert St-Onge & Lorraine Morin - Dorval Astronomy Club, Québec, Canada.
| NGC 7000 :
North America! Position : R.A. 20h58,8m DEC. 44°20 A diffuse emission nebula. It can be seen naked eye in a very dark sky. Of rather large size at 120’X100’. It is 2,8° ESE of the main star Deneb...return to map |
|
| NGC 6910 Position : R.A. 20h23,1m DEC. 40°47’ An open cluster situated at 0,3°north of the Gamma Cygnus star. It is a cluster of magnitude 6,5 and size is 8’. Easy to see in binoculars. M29 Position : R.A. 20h23,9m DEC. 38°32’ An open cluster situated 2° south of Gamma Cygnus. This one is of magnitude 7 and it's size is ~7’ of arc. It is at a distance of ~ 7200 light years. Easy to observe... return to map |
| The Veil nebula(star 52 of Cygnus) and NGC 6960 & NGC 6992/5 Supernova remnants, very dim and wide surface. NGC 6960 goes across the position of the star 52 of Cygnus which is of magnitude 4. This makes it easier to find than 6992/5 . These nebulas can be seen in a dark sky with a telescope of 200 mm aperture. Ideally, it would be best with a filter(OIII) ... return to map |
|
| The Lyra constellation (La Lyre) The famous musical intrument of Apollon, (the Harp) which he gave to Orpheus! It is a small constellation in which the main stars form a shape of a trapezium. It's main star (alpha) is one of the closest ones to us at 26 light years and it is also the brightest one in that area of the sky in visible light at magnitude 0.3. This fantastic star will be the reference star for the terrestrial north pole in 12 000 years because of precession of the poles. * (Beta) star in Lyra "Sheliak " is of magnitude 3,4 and an une eclipse variable, it is of type "Bêta Lyrae". * (Gamma) star in Lyra "Salufat" if of magnitude 3,24. * (Delta) star A double star with a separation of 12’, magnitudes of 4,5 and 5,5. One is orange and one is blue. Good observers can seen them with the naked eye ! * (Zeta) star in Lyra, another double star with magnitudes of 4,3 and 5,7. This couple can be observed with small instruments. * (Epsilon) star in Lyra. The famous test for telescopes, it is a quadruple system. The two main stars are white and separated by 208" and they are of magnitudes of 4,6 and 4,9. Each one is also double and the couple north of epsilon 1 is separated by ~2,6" and the couple south of epsilon 2 is separated by ~ 2,3". M56 Position : R.A. 19h16,6m. DEC. 30°11’ A globular cluster of magnitude 8,2 . An easy object for small instruments... return to map |
| M57 The Ring nebula Position : R.A. 18h53,6m DEC. 33°02’ The Ring nebula is of magnitude 8,9 and it is small with a diameter of ~60" ... return to map |
|
| Vulpecula (Le Petit Renard) and M27 Position : R.A. 19h59,6m DEC.22°43’ A small constellation located east of the southern part of Cygnus. It is very popular with amateurs because of it's wonderful Dumbell nebula M27. It is a planetary nebula in the Vulpecula constellation. An excellent object that can be seen in binoculars even in the city! It is of magnitude 7,6 and it is 8’ by 4’ in size...return to map |
|
| Sagitta (La Flèche) and M71 Position : R.A. 19h53,8m. DEC. 18°47’ It is a small formation of 6 main stars. This one represents the arrow that Hercules used to kill the vulture that was devouring the liver of Prometheus. This small constellation is located south of Vulpecula and easy to see with the naked eye. We also find M71 in it. M71 A globular cluster in the Sagitta constellation. It is an accessible object with binoculars. It is of magnitude 8.3 and a diameter of 6’ of arc. It is one of the closest globulars in our galaxy at ~ 8500 light years.... return to map |
|
Références et consultations :
-Burnham, Robert jr., Burnham’s Celestial
Handbook, New York, Dover Publication inc.,
1978
-Mallas & Kremer, The Messier Album, Cambridge, Mass, Sky Publishing Corporation, 1980
-Vickers, John C., The Deep Space Field Plan, Cambridge, Mass, Sky publishing corporation, 1989
ENTRANCE | HOME | MEMBERS | SCHEDULE | DIRECTIONS | LINKS
SKY THIS MONTH | HOME(français)
| Created on the 31st of january,1999 ©Graphic Design : Marjolaine Savoie email Last revised on the July 1st 2000 |
Our club is member of the: |