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public LocationGreenwich, United Kingdom
Sunrise: 4:53 
Transit: 12:55 
Sunset: 20:59
sunny   (Daytime)   What's Visible Now?


Altitude: -21.8°   Azimuth: 168.4°   Direction: South-South-East

HR4739 is a variable giant star in the constellation of Crux.

HR4739 visual magnitude is 5.5. Because of its reltive faintness, HR4739 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 HR4739 is -0.031 arcsec per year in Right Ascension and 0.005 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4739 star
DSS2 image of HR4739. The red arrow shows the motion of HR4739 during the next 10000 years (-5.17 arcmin in Right Ascension and 0.83 arcmin in declination);

Key facts about HR4739


HR4739 is below the horizon from Greenwich, United Kingdom.

Altitude: -21.8°
Azimuth: 168.4°
Direction: South-South-East

Celestial coordinates and finder chart of HR4739

HR4739 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 HR4739 are provided in the following table:

12h 27m 28s
-58° 59’ 30”

The simplified sky map below shows the position of HR4739 in the sky:

Finder chart HR4739 star
Simplified finder chart for HR4739.

Visibility of HR4739 from your location

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

HR4739 is currently not visible from Greenwich, United Kingdom

Distance of HR4739 from the Sun and relative movement

HR4739 is distant 565.97 light years from the Sun and it is moving far from the Sun at the speed of 72 kilometers per second.

173.61 pc
565.97 ly
72 km/s
-0.031 arcsec/year
0.005 arcsec/year

Spectral properties of HR4739

HR4739 belongs to spectral class M4 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR4739 is situated in the HertzsprungÔÇôRussell diagram.

HR Diagram
H-R diagram showing the position of HR4739. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4739