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public LocationGreenwich, UK
Sunrise: 4:42 
Transit: 13:00 
Sunset: 21:18
sunny   (Daytime)   What's Visible Now?


Below the horizon.  Never rises today
Altitude: -76.6°   Azimuth: 325.1°   Direction: North-West

HR4817 is a variable bright giant star of spectral class B8 in the constellation of Centaurus.

HR4817 visual magnitude is 4.64. Because of its moderate brightness, HR4817 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.

Celestial coordinates and finder chart of HR4817

Finder chart HR4817 star
Simplified finder chart for HR4817.

HR4817 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 HR4817 are provided in the following table:

12h 39m 52s
-39° 59’ 14”
Image of HR4817 star
DSS2 image of HR4817. The red arrow shows the motion of HR4817 during the next 10000 years (-7.83 arcmin in Right Ascension and -5.00 arcmin in declination);

Key facts about HR4817

Bright giant

and has a luminosity class of II corresponding to a bright giant star.


The red dot in the diagram below shows where HR4817 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4817. Attribution: Richard Powell / CC BY-SA

Distance of HR4817 from the Sun and relative movement

HR4817 is distant 354.73 light years from the Sun and it is moving far from the Sun at the speed of 15 kilometers per second.

108.81 pc
354.73 ly
15 km/s
-0.047 arcsec/year
-0.03 arcsec/year

Alternative designations of HR4817


Visibility of HR4817 from your location

HR4817 is currently not visible from Greenwich, UK