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🌎  Greenwich, United Kingdom [change]

HR4991

HR4991 is a giant star in the constellation of Centaurus.

HR4991 visual magnitude is 6.16. Because of its reltive faintness, HR4991 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 HR4991:

6.16
Giant
HR4991 is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of HR4991

HR4991 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 HR4991 are provided in the following table:

13h 13m 57s
-43° 08’ 20”
307.29°
19.54°
Centaurus

The simplified sky map below shows the position of HR4991 in the sky:

Finder chart HR4991 star
Simplified finder chart for HR4991.

Visibility of HR4991 from your location

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

HR4991 is currently not visible from Greenwich, United Kingdom [change]

Digitized Sky Survey image of HR4991

The image below is a photograph of HR4991 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 HR4991 is -0.17 arcsec per year in Right Ascension and 0.028 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR4991 star
DSS2 image of HR4991. The red arrow shows the motion of HR4991 during the next 1000 years (-2.83 arcmin in Right Ascension and 0.47 arcmin in declination);

Distance of HR4991 from the Sun and relative movement

HR4991 is distant 350.91 light years from the Sun and it is moving far from the Sun at the speed of 30 kilometers per second.

107.64 pc
350.91 ly
30 km/s
-0.17 arcsec/year
0.028 arcsec/year

Spectral properties of HR4991

HR4991 belongs to spectral class K4 and has a luminosity class of III corresponding to a giant star.

1.00
K4III
3983K

The red dot in the diagram below shows where HR4991 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4991. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4991

SAO223989
SAO223989