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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: 6:50  
clear_day Transit: 12:11  
SunsetSet: 17:32
sleep NighttimeWhat's Visible Now?
All Constellations » Crux » 


Altitude: -26.0°   Azimuth: 168.4°   Direction: South-South-East

HR4830 is a variable giant star in the constellation of Crux.

HR4830 visual magnitude is 5.31. Because of its reltive faintness, HR4830 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 HR4830 is -0.015 arcsec per year in Right Ascension and 0 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4830 star
DSS2 image of HR4830. The red arrow shows the motion of HR4830 during the next 10000 years (-2.50 arcmin in Right Ascension and 0.00 arcmin in declination);

Key facts about HR4830


HR4830 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -26.0°
Azimuth: 168.4°
Direction: South-South-East

Celestial coordinates and finder chart of HR4830

HR4830 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 HR4830 are provided in the following table:

12h 42m 50s
-63° 03’ 30”

The simplified sky map below shows the position of HR4830 in the sky:

Finder chart HR4830 star
Simplified finder chart for HR4830.

Visibility of HR4830 from your location

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

HR4830 is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of HR4830 from the Sun and relative movement

HR4830 is distant 981.93 light years from the Sun and it is moving far from the Sun at the speed of 35 kilometers per second.

301.20 pc
981.93 ly
35 km/s
-0.015 arcsec/year

Spectral properties of HR4830

HR4830 belongs to spectral class B1 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR4830 is situated in the HertzsprungÔÇôRussell diagram.

HR Diagram
H-R diagram showing the position of HR4830. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4830