Your guide to the Solar System and the night sky
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🌎  Observing from: Greenwich, United Kingdom [change]
🌅 Sunrise: 6:03  ☀️ Transit: 12:06  🌅 Sunset: 18:09

12 Trianguli

12 Trianguli is a hypergiant star in the constellation of Triangulum.

12 Trianguli visual magnitude is 5.29. Because of its reltive faintness, 12 Trianguli should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 12 Trianguli:

12 Trianguli is above the horizon from Greenwich, United Kingdom [change]. Altitude: 64°.

Celestial coordinates and finder chart of 12 Trianguli

12 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 12 Trianguli are provided in the following table:

02h 28m 09s
+29° 40’ 09”

The simplified sky map below shows the position of 12 Trianguli in the sky:

Finder chart 12 Trianguli star
Simplified finder chart for 12 Trianguli.

Visibility of 12 Trianguli from your location

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

Today's 12 Trianguli rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 60.3°
Max altitude: 68.2°
Azimuth: 299.7°
12 Trianguli is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 12 Trianguli

The image below is a photograph of 12 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 12 Trianguli is -0.015 arcsec per year in Right Ascension and -0.087 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 12 Trianguli star
DSS2 image of 12 Trianguli. The red arrow shows the motion of 12 Trianguli during the next 10000 years (-2.50 arcmin in Right Ascension and -14.50 arcmin in declination);

Distance of 12 Trianguli from the Sun and relative movement

12 Trianguli is distant 155.16 light years from the Sun and it is moving towards the Sun at the speed of 25 kilometers per second.

47.60 pc
155.16 ly
-25 km/s
-0.015 arcsec/year
-0.087 arcsec/year

Spectral properties of 12 Trianguli

12 Trianguli belongs to spectral class F0 and has a luminosity class of III corresponding to a hypergiant star.


The red dot in the diagram below shows where 12 Trianguli is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 12 Trianguli. Attribution: Richard Powell / CC BY-SA

Alternative designations of 12 Trianguli

12 Trianguli