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🌎  Greenwich, United Kingdom [change]

HR4939

HR4939 is a variable giant star in the constellation of Centaurus.

HR4939 visual magnitude is 6.43. Because of its reltive faintness, HR4939 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 HR4939:

6.43
Giant
HR4939 is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of HR4939

HR4939 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 HR4939 are provided in the following table:

13h 05m 30s
-52° 06’ 54”
305.13°
10.7°
Centaurus

The simplified sky map below shows the position of HR4939 in the sky:

Finder chart HR4939 star
Simplified finder chart for HR4939.

Visibility of HR4939 from your location

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

HR4939 is currently not visible from Greenwich, United Kingdom [change]

Digitized Sky Survey image of HR4939

The image below is a photograph of HR4939 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 HR4939 is -0.048 arcsec per year in Right Ascension and 0.032 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4939 star
DSS2 image of HR4939. The red arrow shows the motion of HR4939 during the next 10000 years (-8.00 arcmin in Right Ascension and 5.33 arcmin in declination);

Distance of HR4939 from the Sun and relative movement

HR4939 is distant 1,101.35 light years from the Sun and it is moving towards the Sun at the speed of 31 kilometers per second.

337.84 pc
1,101.35 ly
-31 km/s
-0.048 arcsec/year
0.032 arcsec/year

Spectral properties of HR4939

HR4939 belongs to spectral class M1 and has a luminosity class of III corresponding to a giant star.

-1.21
M1III
3516K

The red dot in the diagram below shows where HR4939 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4939. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4939

SAO240535
SAO240535