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🌎  Greenwich, United Kingdom [change]


HR5172 is a variable and double giant star in the constellation of Centaurus.

HR5172 visual magnitude is 4.65. Because of its moderate brightness, HR5172 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 HR5172:

HR5172 is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of HR5172

HR5172 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 HR5172 are provided in the following table:

13h 46m 39s
-51° 25’ 58”

The simplified sky map below shows the position of HR5172 in the sky:

Finder chart HR5172 star
Simplified finder chart for HR5172.

Visibility of HR5172 from your location

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

HR5172 is currently not visible from Greenwich, United Kingdom [change]

Digitized Sky Survey image of HR5172

The image below is a photograph of HR5172 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 HR5172 is 0.006 arcsec per year in Right Ascension and -0.033 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR5172 star
DSS2 image of HR5172. The red arrow shows the motion of HR5172 during the next 10000 years (1.00 arcmin in Right Ascension and -5.50 arcmin in declination);

Distance of HR5172 from the Sun and relative movement

HR5172 is distant 257.10 light years from the Sun and it is moving towards the Sun at the speed of 6 kilometers per second.

78.86 pc
257.10 ly
-6 km/s
0.006 arcsec/year
-0.033 arcsec/year

Spectral properties of HR5172

HR5172 belongs to spectral class G8 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR5172 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR5172. Attribution: Richard Powell / CC BY-SA

HR5172 star system properties

HR5172 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 HR5172 double sysyem:

40 arcsec

Alternative designations of HR5172