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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: 6:40  
clear_day Transit: 12:10  
SunsetSet: 17:41
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All Constellations » Tucana » 

β1 Tucanae (beta1 Tucanae)

Altitude: -45.2°   Azimuth: 220.2°   Direction: South-West

β1 Tucanae is a multiple main-sequence star in the constellation of Tucana.

β1 Tucanae visual magnitude is 4.37. Because of its moderate brightness, β1 Tucanae should be easily visible from locations with dark skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

The proper motion of β1 Tucanae is 0.09 arcsec per year in Right Ascension and -0.054 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of β1 Tucanae (beta1 Tucanae) star
DSS2 image of β1 Tucanae. The red arrow shows the motion of β1 Tucanae during the next 10000 years (15.00 arcmin in Right Ascension and -9.00 arcmin in declination);

Key facts about β1 Tucanae


β1 Tucanae (beta1 Tucanae) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -45.2°
Azimuth: 220.2°
Direction: South-West

Celestial coordinates and finder chart of β1 Tucanae

β1 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 β1 Tucanae are provided in the following table:

00h 31m 32s
-62° 57’ 29”

The simplified sky map below shows the position of β1 Tucanae in the sky:

Finder chart β1 Tucanae (beta1 Tucanae) star
Simplified finder chart for β1 Tucanae (beta1 Tucanae).

Visibility of β1 Tucanae from your location

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

β1 Tucanae (beta1 Tucanae) is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of β1 Tucanae from the Sun and relative movement

β1 Tucanae is distant 139.61 light years from the Sun and it is moving far from the Sun at the speed of 14 kilometers per second.

42.83 pc
139.61 ly
14 km/s
0.09 arcsec/year
-0.054 arcsec/year

Spectral properties of β1 Tucanae

β1 Tucanae belongs to spectral class B9 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where β1 Tucanae is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of β1 Tucanae. Attribution: Richard Powell / CC BY-SA

β1 Tucanae star system properties

β1 Tucanae is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the β1 Tucanae double sysyem:

27 arcsec

Alternative designations of β1 Tucanae

β1 Tucanae
(beta1 Tucanae)