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🌎  Greenwich, United Kingdom [change]

HR4940

HR4940 is a double main-sequence star in the constellation of Centaurus.

HR4940 visual magnitude is 4.71. Because of its moderate brightness, HR4940 should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about HR4940:

4.71
Main-sequence
HR4940 is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of HR4940

HR4940 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 HR4940 are provided in the following table:

13h 06m 16s
-48° 27’ 48”
305.47°
14.34°
Centaurus

The simplified sky map below shows the position of HR4940 in the sky:

Finder chart HR4940 star
Simplified finder chart for HR4940.

Visibility of HR4940 from your location

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

HR4940 is currently not visible from Greenwich, United Kingdom [change]

Digitized Sky Survey image of HR4940

The image below is a photograph of HR4940 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 HR4940 is -0.03 arcsec per year in Right Ascension and -0.023 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4940 star
DSS2 image of HR4940. The red arrow shows the motion of HR4940 during the next 10000 years (-5.00 arcmin in Right Ascension and -3.83 arcmin in declination);

Distance of HR4940 from the Sun and relative movement

HR4940 is distant 413.71 light years from the Sun and it is moving far from the Sun at the speed of 6 kilometers per second.

126.90 pc
413.71 ly
6 km/s
-0.03 arcsec/year
-0.023 arcsec/year

Spectral properties of HR4940

HR4940 belongs to spectral class B5 and has a luminosity class of V corresponding to a main-sequence star.

-0.81
B5V
12293K

The red dot in the diagram below shows where HR4940 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4940. Attribution: Richard Powell / CC BY-SA

HR4940 star system properties

HR4940 is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the HR4940 double sysyem:

4.71
11.21
6.5
11.4 arcsec

Alternative designations of HR4940

SAO223900
SAO223900