Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:50  
clear_day Transit: 12:56  
SunsetSet: 21:03 south
wb_twilight Astronomical TwilightWhat's Visible Now
All Constellations » Centaurus » 


HR5558 is a double hypergiant star in the constellation of Centaurus.

HR5558 visual magnitude is 5.32. Because of its reltive faintness, HR5558 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about HR5558:

HR5558 is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 3°.

Celestial coordinates and finder chart of HR5558

HR5558 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 HR5558 are provided in the following table:

14h 55m 44s
-33° 51’ 20”

The simplified sky map below shows the position of HR5558 in the sky:

Finder chart HR5558 star
Simplified finder chart for HR5558.

Visibility of HR5558 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 HR5558 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: 123.9°
Max altitude: 4.7°
Azimuth: 236.1°
HR5558 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR5558

The image below is a photograph of HR5558 from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of HR5558 is 0.02 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 HR5558 star
DSS2 image of HR5558. The red arrow shows the motion of HR5558 during the next 10000 years (3.33 arcmin in Right Ascension and 0.00 arcmin in declination);

Distance of HR5558 from the Sun and relative movement

HR5558 is distant 246.97 light years from the Sun

75.76 pc
246.97 ly
0.02 arcsec/year

Spectral properties of HR5558

HR5558 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 HR5558 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR5558. Attribution: Richard Powell / CC BY-SA

HR5558 star system properties

HR5558 is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the HR5558 double sysyem:

24.3 arcsec

Alternative designations of HR5558