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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 5:02 
Transit: 12:56 
Sunset: 20:51
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All Constellations » Centaurus » 

4 Centauri

Above the horizon.  Rise: 20:27 | Tran: 22:59 | Set: 1:35
Alt: 6.44°   Az: 181.91°   Direction: South

4 Centauri is a double sub-giant star of spectral class B4 in the constellation of Centaurus.

4 Centauri visual magnitude is 4.73. Because of its moderate brightness, 4 Centauri 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 4 Centauri star
DSS2 image of 4 Centauri. The red arrow shows the motion of 4 Centauri during the next 10000 years (-2.50 arcmin in Right Ascension and -2.00 arcmin in declination);

Celestial Coordinates

Apparent

13h 54m 40s
-32° 03’ 07”
00h 08m 58s
14h 03m 39s

J2000

13h 53m 12s
-31° 55’ 40”

Galactic Coordinates

317.93°
29.14°

Finder Chart

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Finder chart for 4 Centauri.

Magnitude, Color, Spectral Class

4.73
Sub-giant

-1.83
B4IV
12293K

The red dot in the diagram below shows where 4 Centauri is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 4 Centauri. Attribution: Richard Powell / CC BY-SA

Star System Properties

4 Centauri is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the 4 Centauri double sysyem:

4.73
8.43
3.7
14.9 arcsec

Distance, Radial Speed, Proper Motion

4 Centauri is distant 669.40 light years from the Sun and it is moving far from the Sun at the speed of 5 kilometers per second.

205.34
669.40
5 km/s
-0.015 arcsec/y
-0.012"/y

Alternative Designations

SAO204944
SAO204944

Visibility from Your Location

Today's 4 Centauri rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 122.1°
Max altitude: 6.5°
Azimuth: 237.9°