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public LocationGreenwich, UK
TimezoneEurope/London
Sunrise: 5:15 
Transit: 13:06 
Sunset: 20:56
sunny   (Daytime)   What's Visible Now?
All Constellations » Crux » 

HR4644

Below the horizon.  Never rises today
Alt: -39.42°   Az: 145.16°   Direction: South-East

HR4644 is a supergiant star of spectral class B8 in the constellation of Crux.

HR4644 visual magnitude is 5.92. Because of its faintness, HR4644 is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

Image of HR4644 star
DSS2 image of HR4644. The red arrow shows the motion of HR4644 during the next 100000 years (-11.67 arcmin in Right Ascension and 3.33 arcmin in declination);

Celestial Coordinates

Apparent

12h 13m 41s
-63° 05’ 14”
18h 51m 22s
07h 05m 03s

J2000

12h 12m 21s
-62° 57’ 02”

Galactic Coordinates

298.51°
-0.42°

Finder Chart

Finder chart HR4644 star
Simplified finder chart for HR4644.

Magnitude, Color, Spectral Class

5.92
Supergiant

-4.95
B8I
7526K

The red dot in the diagram below shows where HR4644 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4644. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

HR4644 is distant 4,865.67 light years from the Sun and it is moving towards the Sun at the speed of 2 kilometers per second.

1,492.54
4,865.67
-2 km/s
-0.007 arcsec/y
0.002"/y

Alternative Designations

SAO251790
SAO251790

Visibility from Your Location

HR4644 is currently not visible from Greenwich, UK