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🌎  Greenwich, United Kingdom [change]


HR4577 is a double giant star in the constellation of Centaurus.

HR4577 visual magnitude is 6.79. Because of its reltive faintness, HR4577 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 HR4577:

HR4577 is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of HR4577

HR4577 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 HR4577 are provided in the following table:

11h 58m 20s
-40° 56’ 49”

The simplified sky map below shows the position of HR4577 in the sky:

Finder chart HR4577 star
Simplified finder chart for HR4577.

Visibility of HR4577 from your location

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

HR4577 is currently not visible from Greenwich, United Kingdom [change]

Digitized Sky Survey image of HR4577

The image below is a photograph of HR4577 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 HR4577 is -0.057 arcsec per year in Right Ascension and 0.021 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4577 star
DSS2 image of HR4577. The red arrow shows the motion of HR4577 during the next 10000 years (-9.50 arcmin in Right Ascension and 3.50 arcmin in declination);

Distance of HR4577 from the Sun and relative movement

HR4577 is distant 281.52 light years from the Sun and it is moving far from the Sun at the speed of 7 kilometers per second.

86.36 pc
281.52 ly
7 km/s
-0.057 arcsec/year
0.021 arcsec/year

Spectral properties of HR4577

HR4577 belongs to spectral class K1 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR4577 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4577. Attribution: Richard Powell / CC BY-SA

HR4577 star system properties

HR4577 is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the HR4577 double sysyem:

3.1 arcsec

Alternative designations of HR4577