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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 7:10 
Transit: 12:13 
Sunset: 17:18
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All Constellations » Taurus » 

Tianguan - ζ Tauri (zeta Tauri)

Below the horizon.  Rise: 11:53 | Tran: 19:46 | Set: 3:44
Alt: -11.71°   Az: 31.55°   Direction: North-North-East

Tianguan, also designated as ζ Tauri (zeta Tauri), is a variable and double giant star of spectral class B4 in the constellation of Taurus.

Tianguan visual magnitude is 3. Because of its brightness, Tianguan is clearly visible to the naked eye when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.

Image of Tianguan - ζ Tauri (zeta Tauri) star
DSS2 image of Tianguan. The red arrow shows the motion of Tianguan during the next 10000 years (0.00 arcmin in Right Ascension and -3.50 arcmin in declination);

Celestial Coordinates

Apparent

05h 39m 08s
+21° 09’ 20”
14h 13m 17s
19h 52m 25s

J2000

05h 37m 38s
+21° 08’ 32”

Galactic Coordinates

185.69°
-5.64°

Finder Chart

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Finder chart for Tianguan - ζ Tauri (zeta Tauri).

Magnitude, Color, Spectral Class

3
Giant

-2.53
B4III
13348K

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

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

Star System Properties

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

3
5
2
0 arcsec

Distance, Radial Speed, Proper Motion

Tianguan is distant 416.88 light years from the Sun and it is moving far from the Sun at the speed of 20 kilometers per second.

127.88
416.88
20 km/s
-0.021"/y

Alternative Designations

Tianguan
ζ Tauri
(zeta Tauri)
SAO77336
SAO77336

Visibility from Your Location

Today's Tianguan - ζ Tauri (zeta Tauri) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 68.8°
Max altitude: 59.7°
Azimuth: 291.2°