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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:38  
clear_day Transit: 11:46  
SunsetSet: 15:54 south
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All Constellations » Eridanus » 

τ8 Eridani (tau8 Eridani)

Altitude: 12.5°   Azimuth: 164.3°   Direction: South-South-East

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:


τ8 Eridani (tau8 Eridani) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 12.5°
Azimuth: 164.3°
Direction: South-South-East

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:

03h 53m 42s
-24° 36’ 45”

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 edit_location_alt
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 edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 114.6°
Max altitude: 13.9°
Azimuth: 245.4°

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.

Image of τ8 Eridani (tau8 Eridani) star
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.

118.20 pc
385.34 ly
23 km/s
0.023 arcsec/year
-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.


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

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

Alternative designations of τ8 Eridani

τ8 Eridani
(tau8 Eridani)