τ8 Eridani (tau8 Eridani)

τ8 Eridani is a variable main-sequence star in the constellation of Eridanus.

τ8 Eridani visual magnitude is 4.65. Because of its moderate brightness, τ8 Eridani 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 τ8 Eridani:

Color of τ8 Eridani ⬤

Magnitude of τ8 Eridani 4.65

Class Main-sequence

VISIBILITY RIGHT NOW τ8 Eridani (tau8 Eridani) is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of τ8 Eridani

τ8 Eridani 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 τ8 Eridani are provided in the following table:

Right Ascension J2000 03h 53m 42s

Declination J2000 -24° 36’ 45”

Galactic Longitude 220°

Galactic Latitude -49.14°

Constellation Eridanus

The simplified sky map below shows the position of τ8 Eridani in the sky:

Finder chart τ8 Eridani (tau8 Eridani) star

Simplified finder chart for τ8 Eridani (tau8 Eridani).

Visibility of τ8 Eridani from your location

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

Today's τ8 Eridani (tau8 Eridani) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 114.6° RISE 12:52

Max altitude: 13.9° TRANSIT 16:30

Azimuth: 245.4° SET 20:08

RIGHT NOW τ8 Eridani (tau8 Eridani) is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of τ8 Eridani

The image below is a photograph of τ8 Eridani 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 τ8 Eridani is 0.023 arcsec per year in Right Ascension and -0.016 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of τ8 Eridani. The red arrow shows the motion of τ8 Eridani during the next 10000 years (3.83 arcmin in Right Ascension and -2.67 arcmin in declination);

Distance of τ8 Eridani from the Sun and relative movement

τ8 Eridani is distant 385.34 light years from the Sun and it is moving far from the Sun at the speed of 23 kilometers per second.

Distance (parsec) 118.20 pc

Distance (light year) 385.34 ly

Heliocentric radial velocity 23 km/s

Proper Motion RA 0.023 arcsec/year

Proper Motion Dec -0.016 arcsec/year

Spectral properties of τ8 Eridani

τ8 Eridani belongs to spectral class B6 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude -0.71

Spectral Type B6V

Color Index (B-V) -0.13

Temperature of τ8 Eridani 12103K

The red dot in the diagram below shows where τ8 Eridani is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of τ8 Eridani. Attribution: Richard Powell / CC BY-SA

Alternative designations of τ8 Eridani

Bayer designation τ8 Eridani
(tau8 Eridani)

Flamsteed designation 33 Eridani

Henry Draper Catalogue HD24587

SAO Catalogue SAO168925

Hipparcos Catalogue HIP18216

Durchmusterung Catalogue CD-24 1945

General Catalogue of Variable Stars Tau8 Eri

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In Evidence

Other stars in Eridanus