τ5 Eridani (tau5 Eridani)

τ5 Eridani is a main-sequence star in the constellation of Eridanus.

τ5 Eridani visual magnitude is 4.27. Because of its moderate brightness, τ5 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 τ5 Eridani:

Color of τ5 Eridani ⬤

Magnitude of τ5 Eridani 4.27

Class Main-sequence

VISIBILITY RIGHT NOW τ5 Eridani (tau5 Eridani) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 3°.

Celestial coordinates and finder chart of τ5 Eridani

τ5 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 τ5 Eridani are provided in the following table:

Right Ascension J2000 03h 33m 47s

Declination J2000 -21° 37’ 58”

Galactic Longitude 213.52°

Galactic Latitude -52.78°

Constellation Eridanus

The simplified sky map below shows the position of τ5 Eridani in the sky:

Finder chart τ5 Eridani (tau5 Eridani) star

Simplified finder chart for τ5 Eridani (tau5 Eridani).

Visibility of τ5 Eridani from your location

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

Today's τ5 Eridani (tau5 Eridani) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 111.6° RISE 11:27

Max altitude: 16.9° TRANSIT 15:26

Azimuth: 248.4° SET 19:25

RIGHT NOW τ5 Eridani (tau5 Eridani) is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of τ5 Eridani

The image below is a photograph of τ5 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 τ5 Eridani is 0.048 arcsec per year in Right Ascension and -0.027 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of τ5 Eridani. The red arrow shows the motion of τ5 Eridani during the next 10000 years (8.00 arcmin in Right Ascension and -4.50 arcmin in declination);

Distance of τ5 Eridani from the Sun and relative movement

τ5 Eridani is distant 295.83 light years from the Sun and it is moving far from the Sun at the speed of 14 kilometers per second.

Distance (parsec) 90.74 pc

Distance (light year) 295.83 ly

Heliocentric radial velocity 14 km/s

Proper Motion RA 0.048 arcsec/year

Proper Motion Dec -0.027 arcsec/year

Spectral properties of τ5 Eridani

τ5 Eridani belongs to spectral class B8 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude -0.52

Spectral Type B8V

Color Index (B-V) -0.11

Temperature of τ5 Eridani 11744K

The red dot in the diagram below shows where τ5 Eridani is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of τ5 Eridani. Attribution: Richard Powell / CC BY-SA

Alternative designations of τ5 Eridani

Bayer designation τ5 Eridani
(tau5 Eridani)

Flamsteed designation 19 Eridani

Henry Draper Catalogue HD22203

SAO Catalogue SAO168634

Hipparcos Catalogue HIP16611

Durchmusterung Catalogue BD-22 628

FK5 Catalogue 1099

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Other stars in Eridanus