θ1 Crucis (theta1 Crucis)
θ1 Crucis is a double star in the constellation of Crux.
θ1 Crucis visual magnitude is 4.33. Because of its moderate brightness, θ1 Crucis 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 θ1 Crucis:
Celestial coordinates and finder chart of θ1 Crucis
θ1 Crucis is situated south of the celestial equator, as such, it is more easily visible from the southern emisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of θ1 Crucis are provided in the following table:
The simplified sky map below shows the position of θ1 Crucis in the sky:
Visibility of θ1 Crucis from your location
Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
θ1 Crucis (theta1 Crucis) is currently not visible from Greenwich, United Kingdom [change]
Digitized Sky Survey image of θ1 Crucis
The image below is a photograph of θ1 Crucis 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 θ1 Crucis is -0.15 arcsec per year in Right Ascension and 0.008 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.
Distance of θ1 Crucis from the Sun and relative movement
θ1 Crucis is distant 229.74 light years from the Sun and it is moving towards the Sun at the speed of 2 kilometers per second.
Spectral properties of θ1 Crucis
θ1 Crucis belongs to spectral class A θ1 Crucis is also a so called metallic star.
The red dot in the diagram below shows where θ1 Crucis is situated in the Hertzsprung–Russell diagram.
θ1 Crucis star system properties
θ1 Crucis 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 θ1 Crucis double sysyem: