Your guide to the Solar System and the night sky
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🌎  Observing from: Greenwich, United Kingdom [change]
🌅 Sunrise: 6:48  ☀️ Transit: 13:04  🌅 Sunset: 19:21

15 Trianguli

15 Trianguli is a variable and double giant star in the constellation of Triangulum.

15 Trianguli visual magnitude is 5.35. Because of its reltive faintness, 15 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 15 Trianguli:

15 Trianguli is above the horizon from Greenwich, United Kingdom [change]. Altitude: 73°.

Celestial coordinates and finder chart of 15 Trianguli

15 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 15 Trianguli are provided in the following table:

02h 35m 46s
+34° 41’ 14”

The simplified sky map below shows the position of 15 Trianguli in the sky:

Finder chart 15 Trianguli star
Simplified finder chart for 15 Trianguli.

Visibility of 15 Trianguli from your location

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

Today's 15 Trianguli rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 55.3°
Max altitude: 73.2°
Azimuth: 304.7°
15 Trianguli is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 15 Trianguli

The image below is a photograph of 15 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 15 Trianguli is 0.03 arcsec per year in Right Ascension and -0.049 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 15 Trianguli star
DSS2 image of 15 Trianguli. The red arrow shows the motion of 15 Trianguli during the next 10000 years (5.00 arcmin in Right Ascension and -8.17 arcmin in declination);

Distance of 15 Trianguli from the Sun and relative movement

15 Trianguli is distant 32,600,000.00 light years from the Sun and it is moving towards the Sun at the speed of 10 kilometers per second.

10,000,000.00 pc
32,600,000.00 ly
-10 km/s
0.03 arcsec/year
-0.049 arcsec/year

Spectral properties of 15 Trianguli

15 Trianguli belongs to spectral class M3 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 15 Trianguli is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 15 Trianguli. Attribution: Richard Powell / CC BY-SA

15 Trianguli star system properties

15 Trianguli is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the 15 Trianguli double sysyem:

141.3 arcsec

Alternative designations of 15 Trianguli

15 Trianguli