We use cookies to deliver essential features and to measure their performance. Learn more.
Keep TheSkyLive Ad-Free Donate Now!
public LocationGreenwich, UK
Sunrise: 5:15 
Transit: 13:06 
Sunset: 20:56
sunny   (Daytime)   What's Visible Now?
All Constellations » Taurus » 

Aldebaran - α Tauri (alpha Tauri)

Above the horizon.  Rise: 1:57 | Tran: 9:23 | Set: 16:48
Alt: 48.31°   Az: 136.27°   Direction: South-East

Aldebaran, also designated as α Tauri (alpha Tauri), is a variable and multiple giant star of spectral class K5 in the constellation of Taurus.

Aldebaran visual magnitude is 0.85, making it the 13th brightest star in the sky. Because of its brightness, Aldebaran 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 Aldebaran - α Tauri (alpha Tauri) star
DSS2 image of Aldebaran. The red arrow shows the motion of Aldebaran during the next 1000 years (1.05 arcmin in Right Ascension and -3.17 arcmin in declination);

Celestial Coordinates


04h 37m 19s
+16° 33’ 28”
22h 05m 21s
02h 42m 41s


04h 35m 55s
+16° 30’ 33”

Galactic Coordinates


Finder Chart

Finder chart Aldebaran - α Tauri (alpha Tauri) star
Simplified finder chart for Aldebaran - α Tauri (alpha Tauri).

Magnitude, Color, Spectral Class



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

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

Star System Properties

Aldebaran 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 Aldebaran double sysyem:

121.7 arcsec

Distance, Radial Speed, Proper Motion

Aldebaran is distant 65.08 light years from the Sun and it is moving far from the Sun at the speed of 54 kilometers per second.

54 km/s
0.063 arcsec/y

Alternative Designations

α Tauri
(alpha Tauri)
Gl 171.1A

Visibility from Your Location

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

Azimuth: 73.4°
Max altitude: 55.1°
Azimuth: 286.6°