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public  Aurora, Philippines Aurora, Philippines  ⓘ
TimezoneAsia/Manila
Sunrise: 5:36 
Transit: 12:00 
Sunset: 18:25
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All Constellations » Cygnus » 

τ Cygni (tau Cygni)

Below the horizon.  Rise: 19:15 | Tran: 1:55 | Set: 8:40
Alt: -35.03°   Az: 340.03°   Direction: North-North-West

τ Cygni is a variable and multiple sub-giant star of spectral class F2 in the constellation of Cygnus.

τ Cygni visual magnitude is 3.72. Because of its moderate brightness, τ Cygni is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

Image of τ Cygni (tau Cygni) star
DSS2 image of τ Cygni. The red arrow shows the motion of τ Cygni during the next 1000 years (2.67 arcmin in Right Ascension and 7.25 arcmin in declination);

Celestial Coordinates

Apparent

21h 15m 48s
+38° 09’ 09”
10h 36m 41s
07h 52m 29s

J2000

21h 14m 47s
+38° 02’ 44”

Galactic Coordinates

82.85°
-7.43°

Finder Chart

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Finder chart for τ Cygni (tau Cygni).

Magnitude, Color, Spectral Class

3.72
Sub-giant

2.12
F2IV
6934K

The red dot in the diagram below shows where τ Cygni is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of τ Cygni. Attribution: Richard Powell / CC BY-SA

Star System Properties

τ Cygni is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the τ Cygni double sysyem:

3.72
6.22
2.5
1 arcsec

Distance, Radial Speed, Proper Motion

τ Cygni is distant 68.20 light years from the Sun and it is moving towards the Sun at the speed of 21 kilometers per second.

20.92
68.20
-21 km/s
0.16 arcsec/y
0.435"/y

Alternative Designations

τ Cygni
(tau Cygni)
SAO71121
SAO71121
Gl 822.1A

Visibility from Your Location

Today's τ Cygni (tau Cygni) rise, transit and set times from Aurora, Philippines are the following (all times relative to the local timezone Asia/Manila):

Azimuth: 51.8°
Max altitude: 65.1°
Azimuth: 308.2°