Constellation tour in Summer
Cygnus (The Swan)

Click on image to enlarge

Date & Time: Jul 25 2025, from 22:34 to 22:56 JST(+0900)
Composed 8 shots with 3 minutes exposed
Optical: AF zoom-Nikkor 24-85mm (f=35mm, stop: F4.5)
with Kenko Softon Clear filter
Auto-guided with Kenko SKYMEMO S Equatorial
Digital Camera: Nikon D810A
Location: Hitachi-oota city, Ibaraki pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(7360×4912)
Device Size...FX format(36×24mm)
Sensitivity...ISO800, White Balance...Daylight



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.
This image has cropped with an equivalent focal length 50mm.


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.
NGC6894 .....1'-sized ring-shape planetary nebula at 10.3deg. ENE of Albireo
Around NGC6914 .....Small three reflection nebulae paralleling at 2deg. north of gamma Cyg.
NGC7008 .....Planetary nebula at approx. 10deg. north of Deneb, nicknamed "Fetus Nebula"
NGC7027 .....Small proto-palanetary nebula at 3deg. SE of North American Nebula
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
Sh2-97 .....Dimmed 10'-sized emission nebula at 6deg. ENE of Albireo
Around Sh2-98 .....Dimmed emission nebulae at 7deg. NE of Albireo
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
Sh2-116 .....2'-sized round & red diffused nebula at 2.6deg. NW of Deneb
Sh2-113, 114 .....A degree-sized Filamentary circle nebula at 10° SE of Deneb, 12400ly away
Sh2-119 .....Diffused reddish nebula about 2 deg. east of North American Nebula
Sh2-120, 121 .....Two small reddish nebulae at 5 deg. north of North American Nebula
Around Sh2-123 .....Dimmed Hα & dark nebulae lying at 7.7deg. east of North American Nebula
NGC7013 .....Small spiral galaxy at tip of southern wing
vdB133 .....10'-sized reflection nebula at 3.7deg. SSE of γ-Cyg
Abell 61 .....Medium-sized indistinct planetary nebula at 4.7deg. WNW of δCyg
Abell 78 .....Indistinct planetary nebula at 5deg. ENE of ζCyg
Egg Nebula (PK80-6.1) .....Bipolar protoplanetary nebula at 9.4deg. SSE of Deneb
SNR G65.3+5.7 .....Vast & dimmed supernova remnant expanded at 3deg. north of Albireo



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