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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: 6:35  
clear_day Transit: 12:10  
SunsetSet: 17:45
sunny DaytimeWhat's Visible Now?
All Constellations » Centaurus » 


Altitude: -49.5°   Azimuth: 270.3°   Direction: West

HR4838 is a hypergiant star in the constellation of Centaurus.

HR4838 visual magnitude is 6.39. Because of its reltive faintness, HR4838 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 HR4838 is 0.013 arcsec per year in Right Ascension and -0.007 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4838 star
DSS2 image of HR4838. The red arrow shows the motion of HR4838 during the next 10000 years (2.17 arcmin in Right Ascension and -1.17 arcmin in declination);

Key facts about HR4838


HR4838 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -49.5°
Azimuth: 270.3°
Direction: West

Celestial coordinates and finder chart of HR4838

HR4838 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 HR4838 are provided in the following table:

12h 43m 58s
-36° 20’ 57”

The simplified sky map below shows the position of HR4838 in the sky:

Finder chart HR4838 star
Simplified finder chart for HR4838.

Visibility of HR4838 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 HR4838 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: 126.3°
Max altitude: 2.2°
Azimuth: 233.7°

Distance of HR4838 from the Sun and relative movement

HR4838 is distant 973.13 light years from the Sun and it is moving towards the Sun at the speed of 1 kilometers per second.

298.51 pc
973.13 ly
-1 km/s
0.013 arcsec/year
-0.007 arcsec/year

Spectral properties of HR4838

HR4838 belongs to spectral class A0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where HR4838 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4838. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4838