Angetenar - τ2 Eridani (tau2 Eridani)

Angetenar, also designated as τ2 Eridani (tau2 Eridani), is a double hypergiant star in the constellation of Eridanus.

Angetenar visual magnitude is 4.75. Because of its moderate brightness, Angetenar should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about Angetenar:

Color of Angetenar ⬤

Magnitude of Angetenar 4.75

Class Hypergiant

VISIBILITY RIGHT NOW Angetenar - τ2 Eridani (tau2 Eridani) is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of Angetenar

Angetenar is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Angetenar are provided in the following table:

Right Ascension J2000 02h 51m 02s

Declination J2000 -21° 00’ 15”

Galactic Longitude 206.8°

Galactic Latitude -62.09°

Constellation Eridanus

The simplified sky map below shows the position of Angetenar in the sky:

Finder chart Angetenar - τ2 Eridani (tau2 Eridani) star

Simplified finder chart for Angetenar - τ2 Eridani (tau2 Eridani).

Visibility of Angetenar from your location

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

Today's Angetenar - τ2 Eridani (tau2 Eridani) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 111.0° RISE 11:24

Max altitude: 17.5° TRANSIT 15:28

Azimuth: 249.0° SET 19:31

RIGHT NOW Angetenar - τ2 Eridani (tau2 Eridani) is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of Angetenar

The image below is a photograph of Angetenar 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 Angetenar is -0.046 arcsec per year in Right Ascension and -0.019 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of Angetenar - τ2 Eridani (tau2 Eridani) star

DSS2 image of Angetenar. The red arrow shows the motion of Angetenar during the next 10000 years (-7.67 arcmin in Right Ascension and -3.17 arcmin in declination);

Distance of Angetenar from the Sun and relative movement

Angetenar is distant 182.63 light years from the Sun and it is moving towards the Sun at the speed of 9 kilometers per second.

Distance (parsec) 56.02 pc

Distance (light year) 182.63 ly

Heliocentric radial velocity -9 km/s

Proper Motion RA -0.046 arcsec/year

Proper Motion Dec -0.019 arcsec/year

Spectral properties of Angetenar

Angetenar belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.

Absolute magnitude 1.01

Spectral Type K0III

Color Index (B-V) 0.91

Temperature of Angetenar 4970K

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

H-R diagram showing the position of Angetenar. Attribution: Richard Powell / CC BY-SA

Angetenar star system properties

Angetenar 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 Angetenar double sysyem:

Main star magnitude 4.75

Secondary star magnitude 14.95

Magnitude difference 10.2

Separation 46.7 arcsec

Alternative designations of Angetenar

Proper Name Angetenar

Bayer designation τ2 Eridani
(tau2 Eridani)

Flamsteed designation 2 Eridani

Henry Draper Catalogue HD17824

SAO Catalogue SAO168094

Hipparcos Catalogue HIP13288

Durchmusterung Catalogue BD-21 509

FK5 Catalogue 102

Aitken Double Star Catalogue ADS2179

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Other stars in Eridanus