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🌎  Greenwich, United Kingdom [change]


HR4578 is a supergiant star in the constellation of Crux.

HR4578 visual magnitude is 5.61. Because of its reltive faintness, HR4578 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 HR4578:

HR4578 is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of HR4578

HR4578 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 HR4578 are provided in the following table:

11h 58m 47s
-64° 20’ 21”

The simplified sky map below shows the position of HR4578 in the sky:

Finder chart HR4578 star
Simplified finder chart for HR4578.

Visibility of HR4578 from your location

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

HR4578 is currently not visible from Greenwich, United Kingdom [change]

Digitized Sky Survey image of HR4578

The image below is a photograph of HR4578 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 HR4578 is -0.001 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 HR4578 star
DSS2 image of HR4578. The red arrow shows the motion of HR4578 during the next 10000 years (-0.17 arcmin in Right Ascension and 2.00 arcmin in declination);

Distance of HR4578 from the Sun and relative movement

HR4578 is distant 2,834.78 light years from the Sun and it is moving far from the Sun at the speed of 2 kilometers per second.

869.57 pc
2,834.78 ly
2 km/s
-0.001 arcsec/year
0.012 arcsec/year

Spectral properties of HR4578

HR4578 belongs to spectral class A3 and has a luminosity class of I corresponding to a supergiant star.


The red dot in the diagram below shows where HR4578 is situated in the HertzsprungÔÇôRussell diagram.

HR Diagram
H-R diagram showing the position of HR4578. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4578