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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: 6:40  
clear_day Transit: 12:10  
SunsetSet: 17:41
sleep NighttimeWhat's Visible Now?
All Constellations » Centaurus » 


Altitude: -11.1°   Azimuth: 139.3°   Direction: South-East

HR4631 is a main-sequence star in the constellation of Centaurus.

HR4631 visual magnitude is 6.06. Because of its reltive faintness, HR4631 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of HR4631 is 0.047 arcsec per year in Right Ascension and -0.035 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4631 star
DSS2 image of HR4631. The red arrow shows the motion of HR4631 during the next 10000 years (7.83 arcmin in Right Ascension and -5.83 arcmin in declination);

Key facts about HR4631


HR4631 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -11.1°
Azimuth: 139.3°
Direction: South-East

Celestial coordinates and finder chart of HR4631

HR4631 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 HR4631 are provided in the following table:

12h 10m 33s
-37° 52’ 13”

The simplified sky map below shows the position of HR4631 in the sky:

Finder chart HR4631 star
Simplified finder chart for HR4631.

Visibility of HR4631 from your location

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

Today's HR4631 rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 127.9°
Max altitude: 0.6°
Azimuth: 232.1°

Distance of HR4631 from the Sun and relative movement

HR4631 is distant 233.52 light years from the Sun and it is moving towards the Sun at the speed of 7 kilometers per second.

71.63 pc
233.52 ly
-7 km/s
0.047 arcsec/year
-0.035 arcsec/year

Spectral properties of HR4631

HR4631 belongs to spectral class A5 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR4631 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4631. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4631