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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
SunriseRise: 6:59  
clear_day Transit: 12:12  
SunsetSet: 17:25
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All Constellations » Tucana » 

β3 Tucanae (beta3 Tucanae)

Altitude: -28.8°   Azimuth: 199.6°   Direction: South-South-West

β3 Tucanae is a double hypergiant star in the constellation of Tucana.

β3 Tucanae visual magnitude is 5.09. Because of its reltive faintness, β3 Tucanae should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The proper motion of β3 Tucanae is 0.081 arcsec per year in Right Ascension and -0.038 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of β3 Tucanae (beta3 Tucanae) star
DSS2 image of β3 Tucanae. The red arrow shows the motion of β3 Tucanae during the next 10000 years (13.50 arcmin in Right Ascension and -6.33 arcmin in declination);

Key facts about β3 Tucanae


β3 Tucanae (beta3 Tucanae) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -28.8°
Azimuth: 199.6°
Direction: South-South-West

Celestial coordinates and finder chart of β3 Tucanae

β3 Tucanae is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of β3 Tucanae are provided in the following table:

00h 32m 43s
-63° 01’ 51”

The simplified sky map below shows the position of β3 Tucanae in the sky:

Finder chart β3 Tucanae (beta3 Tucanae) star
Simplified finder chart for β3 Tucanae (beta3 Tucanae).

Visibility of β3 Tucanae from your location

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

β3 Tucanae (beta3 Tucanae) is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of β3 Tucanae from the Sun and relative movement

β3 Tucanae is distant 151.49 light years from the Sun and it is moving far from the Sun at the speed of 5 kilometers per second.

46.47 pc
151.49 ly
5 km/s
0.081 arcsec/year
-0.038 arcsec/year

Spectral properties of β3 Tucanae

β3 Tucanae belongs to spectral class A0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where β3 Tucanae is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of β3 Tucanae. Attribution: Richard Powell / CC BY-SA

β3 Tucanae star system properties

β3 Tucanae 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 β3 Tucanae double sysyem:

0.1 arcsec

Alternative designations of β3 Tucanae

β3 Tucanae
(beta3 Tucanae)
Wo 9015 A