τ Cassiopeiae (tau Cassiopeiae)

Above the horizon. Circumpolar today

Alt: 82.61° Az: 7.34° Direction: North

τ Cassiopeiae is a variable giant star of spectral class K1 in the constellation of Cassiopeia.

τ Cassiopeiae visual magnitude is 4.87. Because of its moderate brightness, τ Cassiopeiae 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.

Image of τ Cassiopeiae (tau Cassiopeiae) star

DSS2 image of τ Cassiopeiae. The red arrow shows the motion of τ Cassiopeiae during the next 10000 years (10.17 arcmin in Right Ascension and 9.50 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 23h 48m 18s

Declination +58° 47’ 37”

Hour Angle 23h 52m 44s

Sidereal Time 23h 41m 03s

J2000

Right Ascension 23h 47m 03s

Declination +58° 39’ 06”

Galactic Coordinates

Galactic Longitude 114.63°

Galactic Latitude -3.18°

Finder Chart

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Finder chart for τ Cassiopeiae (tau Cassiopeiae).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.87

Class Giant

Absolute magnitude 1.25

Spectral Type K1III

Color Index (B-V) 1.11

Temperature 4493K

The red dot in the diagram below shows where τ Cassiopeiae is situated in the Hertzsprung–Russell diagram.

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

Distance, Radial Speed, Proper Motion

τ Cassiopeiae is distant 172.67 light years from the Sun and it is moving towards the Sun at the speed of 21 kilometers per second.

Distance (parsec) 52.97

Distance (light year) 172.67

Radial Speed -21 km/s

Proper Motion RA 0.061 arcsec/y

Proper Motion Dec 0.057"/y

Alternative Designations

Bayer designation τ Cassiopeiae
(tau Cassiopeiae)

Flamsteed designation 5 Cassiopeiae

Henry Draper Catalogue HD223165

SAO Catalogue SAO35763

Hipparcos Catalogue HIP117301

Durchmusterung Catalogue BD+57 2804

FK5 Catalogue 3909

General Catalogue of Variable Stars 14707

Visibility from Your Location

τ Cassiopeiae (tau Cassiopeiae) is circumpolar and transits at 05:02 UTC (altitude: 82.7°)

Set Location

Other stars in Cassiopeia