Your guide to the Solar System and the night sky
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🌎  Observing from: Greenwich, United Kingdom [change]
🌅 Sunrise: 6:45  ☀️ Transit: 13:03  🌅 Sunset: 19:23

β Trianguli (beta Trianguli)

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

β Trianguli visual magnitude is 3. Thanks to its high brightness, β Trianguli is clearly visible when observed from locations with dark skyes, and should be also quite easily visible from light polluted areas.

The table below summarizes the key facts about β Trianguli:

β Trianguli (beta Trianguli) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 21°.

Celestial coordinates and finder chart of β 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”

The simplified sky map below shows the position of β Trianguli in the sky:

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

Visibility of β Trianguli from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

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

Azimuth: 55.0°
Max altitude: 73.5°
Azimuth: 305.0°
β Trianguli (beta Trianguli) is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of β Trianguli

The image below is a photograph of β Trianguli from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of β Trianguli is 0.15 arcsec per year in Right Ascension and -0.04 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

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);

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

Spectral properties of β Trianguli

β Trianguli belongs to spectral class A5 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

Alternative designations of β Trianguli

β Trianguli
(beta Trianguli)
4 Trianguli