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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: 6:55  
clear_day Transit: 12:11  
SunsetSet: 17:29
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All Constellations » Crux » 

θ2 Crucis (theta2 Crucis)

Altitude: -58.4°   Azimuth: 226.2°   Direction: South-West

θ2 Crucis is a variable sub-giant star in the constellation of Crux.

θ2 Crucis visual magnitude is 4.72. Because of its moderate brightness, θ2 Crucis 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 θ2 Crucis is -0.02 arcsec per year in Right Ascension and 0.008 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of θ2 Crucis (theta2 Crucis) star
DSS2 image of θ2 Crucis. The red arrow shows the motion of θ2 Crucis during the next 10000 years (-3.33 arcmin in Right Ascension and 1.33 arcmin in declination);

Key facts about θ2 Crucis


θ2 Crucis (theta2 Crucis) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -58.4°
Azimuth: 226.2°
Direction: South-West

Celestial coordinates and finder chart of θ2 Crucis

θ2 Crucis 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 θ2 Crucis are provided in the following table:

12h 04m 19s
-63° 09’ 56”

The simplified sky map below shows the position of θ2 Crucis in the sky:

Finder chart θ2 Crucis (theta2 Crucis) star
Simplified finder chart for θ2 Crucis (theta2 Crucis).

Visibility of θ2 Crucis from your location

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

θ2 Crucis (theta2 Crucis) is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of θ2 Crucis from the Sun and relative movement

θ2 Crucis is distant 752.89 light years from the Sun and it is moving far from the Sun at the speed of 16 kilometers per second.

230.95 pc
752.89 ly
16 km/s
-0.02 arcsec/year
0.008 arcsec/year

Spectral properties of θ2 Crucis

θ2 Crucis belongs to spectral class B2 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where θ2 Crucis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of θ2 Crucis. Attribution: Richard Powell / CC BY-SA

Alternative designations of θ2 Crucis

θ2 Crucis
(theta2 Crucis)