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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:51  
clear_day Transit: 11:50  
SunsetSet: 15:49 south
sunny DaytimeWhat's Visible Now?
All Constellations » Pisces » 

τ Piscium (tau Piscium)

Altitude: 5.6°   Azimuth: 46.7°   Direction: North-East

τ Piscium is a hypergiant star in the constellation of Pisces.

τ Piscium visual magnitude is 4.51. Because of its moderate brightness, τ Piscium 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 τ Piscium:


τ Piscium (tau Piscium) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 5.6°
Azimuth: 46.7°
Direction: North-East

Celestial coordinates and finder chart of τ Piscium

τ Piscium is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of τ Piscium are provided in the following table:

01h 11m 39s
+30° 05’ 22”

The simplified sky map below shows the position of τ Piscium in the sky:

Finder chart τ Piscium (tau Piscium) star
Simplified finder chart for τ Piscium (tau Piscium).

Visibility of τ Piscium from your location

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

Today's τ Piscium (tau Piscium) rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 59.9°
Max altitude: 68.6°
Azimuth: 300.1°

Digitized Sky Survey image of τ Piscium

The image below is a photograph of τ Piscium 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 τ Piscium is 0.072 arcsec per year in Right Ascension and -0.035 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of τ Piscium (tau Piscium) star
DSS2 image of τ Piscium. The red arrow shows the motion of τ Piscium during the next 10000 years (12.00 arcmin in Right Ascension and -5.83 arcmin in declination);

Distance of τ Piscium from the Sun and relative movement

τ Piscium is distant 162.11 light years from the Sun and it is moving far from the Sun at the speed of 30 kilometers per second.

49.73 pc
162.11 ly
30 km/s
0.072 arcsec/year
-0.035 arcsec/year

Spectral properties of τ Piscium

τ Piscium belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.


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

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

Alternative designations of τ Piscium

τ Piscium
(tau Piscium)