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🌎  Greenwich, United Kingdom [change]

HR4771

HR4771 is a giant star in the constellation of Crux.

HR4771 visual magnitude is 5.95. Because of its reltive faintness, HR4771 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 HR4771:

5.95
Giant
HR4771 is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of HR4771

HR4771 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 HR4771 are provided in the following table:

12h 31m 55s
-63° 30’ 21”
300.76°
-0.72°
Crux

The simplified sky map below shows the position of HR4771 in the sky:

Finder chart HR4771 star
Simplified finder chart for HR4771.

Visibility of HR4771 from your location

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

HR4771 is currently not visible from Greenwich, United Kingdom [change]

Digitized Sky Survey image of HR4771

The image below is a photograph of HR4771 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 HR4771 is -0.063 arcsec per year in Right Ascension and 0.008 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4771 star
DSS2 image of HR4771. The red arrow shows the motion of HR4771 during the next 10000 years (-10.50 arcmin in Right Ascension and 1.33 arcmin in declination);

Distance of HR4771 from the Sun and relative movement

HR4771 is distant 240.41 light years from the Sun and it is moving far from the Sun at the speed of 4 kilometers per second.

73.75 pc
240.41 ly
4 km/s
-0.063 arcsec/year
0.008 arcsec/year

Spectral properties of HR4771

HR4771 belongs to spectral class A8 and has a luminosity class of III corresponding to a giant star.

1.61
A8III
7658K

The red dot in the diagram below shows where HR4771 is situated in the HertzsprungÔÇôRussell diagram.

HR Diagram
H-R diagram showing the position of HR4771. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4771

SAO251946
SAO251946