We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
Help keep this site free and ads-free: donate now!
public LocationGreenwich, UK
Sunrise: 4:43 
Transit: 13:01 
Sunset: 21:18
wb_twilight   (Astronomical Twilight)   What's Visible Now?
All Constellations » Triangulum » 

β Trianguli (beta Trianguli)

Above the horizon.  Rise: 22:46 | Tran: 8:53 | Set: 18:56
Altitude: 19.9°   Azimuth: 58.3°   Direction: East-North-East

β Trianguli is a giant star of spectral class A5 in the constellation of Triangulum.

β Trianguli visual magnitude is 3. Because of its brightness, β Trianguli 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.

Celestial coordinates and finder chart of β Trianguli

Finder chart β Trianguli (beta Trianguli) star
Simplified finder chart for β Trianguli (beta Trianguli).

β Trianguli is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of β Trianguli are provided in the following table:

02h 09m 32s
+34° 59’ 13”
Image of β Trianguli (beta Trianguli) star
DSS2 image of β Trianguli. The red arrow shows the motion of β Trianguli during the next 1000 years (2.50 arcmin in Right Ascension and -0.67 arcmin in declination);

Key facts about β Trianguli


and has a luminosity class of III corresponding to a giant star.


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

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

Distance of β Trianguli from the Sun and relative movement

β Trianguli is distant 124.24 light years from the Sun and it is moving far from the Sun at the speed of 10 kilometers per second.

38.11 pc
124.24 ly
10 km/s
0.15 arcsec/year
-0.04 arcsec/year

Alternative designations of β Trianguli

β Trianguli
(beta Trianguli)
4 Trianguli

Visibility of β Trianguli from your location

Today's β Trianguli (beta Trianguli) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 55.0°
Max altitude: 73.5°
Azimuth: 305.0°