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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: 6:48  
clear_day Transit: 12:11  
SunsetSet: 17:34
sleep NighttimeWhat's Visible Now?
All Constellations » Antlia » 


Altitude: 7.7°   Azimuth: 162.8°   Direction: South-South-East

HR4049 is a variable hypergiant star in the constellation of Antlia.

HR4049 visual magnitude is 5.34. Because of its reltive faintness, HR4049 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 HR4049 is -0.01 arcsec per year in Right Ascension and 0.012 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4049 star
DSS2 image of HR4049. The red arrow shows the motion of HR4049 during the next 10000 years (-1.67 arcmin in Right Ascension and 2.00 arcmin in declination);

Key facts about HR4049


HR4049 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 7.7°
Azimuth: 162.8°
Direction: South-South-East

Celestial coordinates and finder chart of HR4049

HR4049 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 HR4049 are provided in the following table:

10h 18m 07s
-28° 59’ 30”

The simplified sky map below shows the position of HR4049 in the sky:

Finder chart HR4049 star
Simplified finder chart for HR4049.

Visibility of HR4049 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 HR4049 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: 119.0°
Max altitude: 9.5°
Azimuth: 241.0°

Distance of HR4049 from the Sun and relative movement

HR4049 is distant 2,173.33 light years from the Sun and it is moving towards the Sun at the speed of 33 kilometers per second.

666.67 pc
2,173.33 ly
-33 km/s
-0.01 arcsec/year
0.012 arcsec/year

Spectral properties of HR4049

HR4049 belongs to spectral class A0 and has a luminosity class of I corresponding to a hypergiant star.


The red dot in the diagram below shows where HR4049 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR4049. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4049