Your guide to the Solar System and the night sky
🌎 Location: Greenwich, United Kingdom [change]

ε Trianguli (epsilon Trianguli)

ε Trianguli is a variable and double main-sequence star in the constellation of Triangulum.

ε Trianguli visual magnitude is 5.5. Because of its reltive faintness, ε 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 ε Trianguli:

5.5
Main-sequence
ε Trianguli (epsilon Trianguli) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 15°.

Celestial coordinates and finder chart of ε Trianguli

ε 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 ε Trianguli are provided in the following table:

02h 02m 57s
+33° 17’ 02”
139.71°
-27.25°
Triangulum

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

Finder chart ε Trianguli (epsilon Trianguli) star
Simplified finder chart for ε Trianguli (epsilon Trianguli).

Visibility of ε Trianguli from your location

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

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

Azimuth: 56.7°
Max altitude: 71.8°
Azimuth: 303.3°
ε Trianguli (epsilon Trianguli) is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of ε Trianguli

The image below is a photograph of ε 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 ε Trianguli is -0.016 arcsec per year in Right Ascension and -0.013 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of ε Trianguli (epsilon Trianguli) star
DSS2 image of ε Trianguli. The red arrow shows the motion of ε Trianguli during the next 10000 years (-2.67 arcmin in Right Ascension and -2.17 arcmin in declination);

Distance of ε Trianguli from the Sun and relative movement

ε Trianguli is distant 370.03 light years from the Sun and it is moving far from the Sun at the speed of 3 kilometers per second.

113.51 pc
370.03 ly
3 km/s
-0.016 arcsec/year
-0.013 arcsec/year

Spectral properties of ε Trianguli

ε Trianguli belongs to spectral class A2 and has a luminosity class of V corresponding to a main-sequence star.

0.22
A2V
9766K

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

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

ε Trianguli star system properties

ε Trianguli 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 ε Trianguli double sysyem:

5.5
11.5
6
4.2 arcsec

Alternative designations of ε Trianguli

ε Trianguli
(epsilon Trianguli)
3 Trianguli
SAO55218
SAO55218