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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: 6:59  
clear_day Transit: 12:12  
SunsetSet: 17:25
sunny DaytimeWhat's Visible Now?
All Constellations » Centaurus » 


Altitude: -30.7°   Azimuth: 249.7°   Direction: West-South-West

HR4947 is a hypergiant star in the constellation of Centaurus.

HR4947 visual magnitude is 6.54. Because of its reltive faintness, HR4947 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The proper motion of HR4947 is 0.041 arcsec per year in Right Ascension and -0.078 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4947 star
DSS2 image of HR4947. The red arrow shows the motion of HR4947 during the next 10000 years (6.83 arcmin in Right Ascension and -13.00 arcmin in declination);

Key facts about HR4947


HR4947 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -30.7°
Azimuth: 249.7°
Direction: West-South-West

Celestial coordinates and finder chart of HR4947

HR4947 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 HR4947 are provided in the following table:

13h 06m 54s
-35° 51’ 42”

The simplified sky map below shows the position of HR4947 in the sky:

Finder chart HR4947 star
Simplified finder chart for HR4947.

Visibility of HR4947 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 HR4947 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: 125.9°
Max altitude: 2.7°
Azimuth: 234.1°

Distance of HR4947 from the Sun and relative movement

HR4947 is distant 229.25 light years from the Sun and it is moving far from the Sun at the speed of 16 kilometers per second.

70.32 pc
229.25 ly
16 km/s
0.041 arcsec/year
-0.078 arcsec/year

Spectral properties of HR4947

HR4947 belongs to spectral class A0 and has a luminosity class of IV corresponding to a hypergiant star.


The red dot in the diagram below shows where HR4947 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4947. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4947