τ4 Eridani (tau4 Eridani)
τ4 Eridani is a variable and multiple giant star of spectral class M3 in the constellation of Eridanus.
τ4 Eridani visual magnitude is 3.69. Because of its moderate brightness, τ4 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.

Celestial Coordinates
Apparent
J2000
Galactic Coordinates
Finder Chart
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Finder chart for τ4 Eridani (tau4 Eridani).
Magnitude, Color, Spectral Class

The red dot in the diagram below shows where τ4 Eridani is situated in the Hertzsprung–Russell diagram.

Star System Properties
τ4 Eridani is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the τ4 Eridani double sysyem:
Distance, Radial Speed, Proper Motion
τ4 Eridani is distant 258.12 light years from the Sun and it is moving far from the Sun at the speed of 42 kilometers per second.
Alternative Designations
Visibility from Your Location
Today's τ4 Eridani (tau4 Eridani) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):