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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 7:14 
Transit: 11:44 
Sunset: 16:13
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All Constellations » Crux » 

θ1 Crucis (theta1 Crucis)

Below the horizon.  Never rises today
Alt: -73.36°   Az: 144.35°   Direction: South-East

θ1 Crucis is a double star of spectral class A in the constellation of Crux.

θ1 Crucis visual magnitude is 4.33. Because of its moderate brightness, θ1 Crucis is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

Image of θ1 Crucis (theta1 Crucis) star
DSS2 image of θ1 Crucis. The red arrow shows the motion of θ1 Crucis during the next 1000 years (-2.50 arcmin in Right Ascension and 0.13 arcmin in declination);

Celestial Coordinates

Apparent

12h 04m 19s
-63° 27’ 04”
13h 27m 42s
01h 32m 01s

J2000

12h 03m 01s
-63° 18’ 46”

Galactic Coordinates

297.53°
-0.95°

Finder Chart

Finder chart θ1 Crucis (theta1 Crucis) star
Simplified finder chart for θ1 Crucis (theta1 Crucis).

Magnitude, Color, Spectral Class

4.33
θ1 Crucis is also a so called metallic star.

0.09
A
7658K

The red dot in the diagram below shows where θ1 Crucis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of θ1 Crucis. Attribution: Richard Powell / CC BY-SA

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:

4.33
13.63
9.3
4.5 arcsec

Distance, Radial Speed, Proper Motion

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.

70.47
229.74
-2 km/s
-0.15 arcsec/y
0.008"/y

Alternative Designations

θ1 Crucis
(theta1 Crucis)
SAO251705
SAO251705

Visibility from Your Location

θ1 Crucis (theta1 Crucis) is currently not visible from Greenwich, UK