τ1 Eridani (tau1 Eridani)

Below the horizon. Rise: 17:18 | Tran: 21:37 | Set: 2:00

Alt: -31.49° Az: 80.04° Direction: East

τ1 Eridani is a main-sequence star of spectral class F6 in the constellation of Eridanus.

τ1 Eridani visual magnitude is 4.47. Because of its moderate brightness, τ1 Eridani is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

DSS2 image of τ1 Eridani. The red arrow shows the motion of τ1 Eridani during the next 1000 years (5.50 arcmin in Right Ascension and 0.63 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 02h 46m 15s

Declination -18° 28’ 06”

Hour Angle 16h 09m 14s

Sidereal Time 18h 55m 29s

J2000

Right Ascension 02h 45m 06s

Declination -18° 34’ 21”

Galactic Coordinates

Galactic Longitude 200.83°

Galactic Latitude -62.53°

Finder Chart

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Finder chart for τ1 Eridani (tau1 Eridani).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.47

Class Main-sequence

Absolute magnitude 3.74

Spectral Type F6V

Color Index (B-V) 0.48

Temperature 6481K

The red dot in the diagram below shows where τ1 Eridani is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of τ1 Eridani. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

τ1 Eridani is distant 45.56 light years from the Sun and it is moving far from the Sun at the speed of 26 kilometers per second.

Distance (parsec) 13.97

Distance (light year) 45.56

Radial Speed 26 km/s

Proper Motion RA 0.33 arcsec/y

Proper Motion Dec 0.038"/y

Alternative Designations

Bayer designation τ1 Eridani
(tau1 Eridani)

Flamsteed designation 1 Eridani

Henry Draper Catalogue HD17206

SAO Catalogue SAO148584

Hipparcos Catalogue HIP12843

Durchmusterung Catalogue BD-19 518

Gliese Catalogue Gl 111

Visibility from Your Location

Today's τ1 Eridani (tau1 Eridani) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 108.5° RISE 17:18

Max altitude: 20.1° TRANSIT 21:37

Azimuth: 251.5° SET 2:00

Set Location

Other stars in Eridanus