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🌎  Greenwich, United Kingdom [change]


HR4636 is a double hypergiant star in the constellation of Centaurus.

HR4636 visual magnitude is 6.61. Because of its reltive faintness, HR4636 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 HR4636:

HR4636 is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of HR4636

HR4636 is situated south of the celestial equator, as such, it is more easily visible from the southern emisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR4636 are provided in the following table:

12h 11m 02s
-45° 25’ 22”

The simplified sky map below shows the position of HR4636 in the sky:

Finder chart HR4636 star
Simplified finder chart for HR4636.

Visibility of HR4636 from your location

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

HR4636 is currently not visible from Greenwich, United Kingdom [change]

Digitized Sky Survey image of HR4636

The image below is a photograph of HR4636 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 HR4636 is -0.018 arcsec per year in Right Ascension and 0.009 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4636 star
DSS2 image of HR4636. The red arrow shows the motion of HR4636 during the next 10000 years (-3.00 arcmin in Right Ascension and 1.50 arcmin in declination);

Distance of HR4636 from the Sun and relative movement

HR4636 is distant 1,244.27 light years from the Sun and it is moving far from the Sun at the speed of 6 kilometers per second.

381.68 pc
1,244.27 ly
6 km/s
-0.018 arcsec/year
0.009 arcsec/year

Spectral properties of HR4636

HR4636 belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.


The red dot in the diagram below shows where HR4636 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4636. Attribution: Richard Powell / CC BY-SA

HR4636 star system properties

HR4636 is a visual double star which can be observed with the help of medium or large telescopes. The table below shows key information about the HR4636 double sysyem:

2.3 arcsec

Alternative designations of HR4636