τ3 Eridani (tau3 Eridani)

Below the horizon. Rise: 0:50 | Tran: 4:40 | Set: 8:26

Alt: -61.46° Az: 14.51° Direction: North-North-East

τ3 Eridani is a sub-giant star of spectral class A4 in the constellation of Eridanus.

τ3 Eridani visual magnitude is 4.09. Because of its moderate brightness, τ3 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 τ3 Eridani. The red arrow shows the motion of τ3 Eridani during the next 1000 years (-2.42 arcmin in Right Ascension and -0.90 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 03h 03m 29s

Declination -23° 31’ 42”

Hour Angle 12h 30m 00s

Sideral Time 15h 33m 29s

J2000

Right Ascension 03h 02m 23s

Declination -23° 37’ 27”

Galactic Coordinates

Galactic Longitude 213.54°

Galactic Latitude -60.29°

Finder Chart

Simplified finder chart for τ3 Eridani (tau3 Eridani).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.09

Class Sub-giant

Absolute magnitude 1.98

Spectral Type A4IV

Color Index (B-V) 0.16

Temperature 8486K

The red dot in the diagram below shows where τ3 Eridani is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of τ3 Eridani. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

τ3 Eridani is distant 86.13 light years from the Sun and it is moving towards the Sun at the speed of 10 kilometers per second.

Distance (parsec) 26.42

Distance (light year) 86.13

Radial Speed -10 km/s

Proper Motion RA -0.145 arcsec/y

Proper Motion Dec -0.054"/y

Alternative Designations

Bayer designation τ3 Eridani
(tau3 Eridani)

Flamsteed designation 11 Eridani

Henry Draper Catalogue HD18978

SAO Catalogue SAO168249

Hipparcos Catalogue HIP14146

Durchmusterung Catalogue CD-24 1387

Gliese Catalogue Gl 121

FK5 Catalogue 1085

Visibility from Your Location

Today's τ3 Eridani (tau3 Eridani) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 113.5° RISE 0:50

Max altitude: 15.0° TRANSIT 4:40

Azimuth: 246.5° SET 8:26

Name:	Greenwich, UK
Latitude:	51° 28' 48.0" N
Longitude:	0° 0' 0.0" E
Timezone:	Europe/London

Location

Other stars in Eridanus