Constellation tour in Summer
Cygnus (The Swan)

Date & Time: Aug 6 2005, 27:17 JST(+0900), 20min. Exp.
Optical: SMC TAKUMAR f=105mm F2.4, Aperture: F4.0, with Cokin Diffuser 1 filter
Auto-guided with Kenko SKYMEMO Equatorial
Camera: PENTAX 67
Film: Ektachrome E200 (+1EV pushed)
Location: Koumi town, Nagano pref.

ASCII/Astroarts StellaNavigator
The constellation of Cygnus, The Swan, is seen in about zenith at northern hemisphere, and is one of most obvious asterisms in summer skies, which because of its shape is known as the Northern Cross.
Alpha Cygni that marks the tail of swan is called Deneb, from "Al Dhanab al Dajajah" meaning of the Hen's tail. The star forms "The Great Summer's Triangle" with Altair (alpha Aquilae) and Vega (alpha Lyrae), and Deneb has the lowest magnitude in the trio, because of the star has the farthest distance of 1500 light years in bright stars with the first magnitude in heavens. Deneb is considered as a white supergiant.
And beta Cygni positioned at the head of swan is also known as "Albireo", a magnificent binary system of gold and blue. The component is quite wide, marking it a popular object for binoculars.

Guide for Deep Sky Objects

North American Nebula .....Large Diffused Nebula 3 degrees East of Deneb
IC1318 .....Diffused Nebula spread around Gamma Cygni
Veil Nebula .....Loop-shaped faint Nebula at a wing of south-side
Diffused Nebulae in Cygnus .....Wide-angle view includes 3 objects above
Blinking Planetary .....A small and round planetary in western wing of Swan, 1690 ly away
Crescent Nebula .....Small semicircular nebula 6 deg. SW of gamma Cyg.
Cocoon Nebula .....Small Diffused Nebula near the boundary on Cepheus
M29 .....Small open cluster 2 deg. south of gamma Cyg.
M39 .....Scattered open cluster 7 degrees NE of North American Nebula
Diffused Nebula around eta Cyg(Sh2-101) .....Filaments of reddish nebulae around the neck of Swan
Around Sh2-112, 115 .....Two small diffused nebulae and surrounding nebulosities in NW of Deneb
Sh2-119 .....Diffused reddish nebula about 2 deg. east of North American Nebula
NGC7013 ....Small spiral galaxy at tip of southern wing



Copyright(c) 2005 by Naoyuki Kurita, All rights reserved.
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