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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:50  
clear_day Transit: 12:11  
SunsetSet: 17:32
sleep NighttimeWhat's Visible Now?
All Constellations » Libra » 

47 Librae

Altitude: -10.5°   Azimuth: 108.1°   Direction: East-South-East

47 Librae is a variable and double main-sequence star in the constellation of Libra.

47 Librae visual magnitude is 5.94. Because of its reltive faintness, 47 Librae should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of 47 Librae is -0.016 arcsec per year in Right Ascension and -0.02 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 47 Librae star
DSS2 image of 47 Librae. The red arrow shows the motion of 47 Librae during the next 10000 years (-2.67 arcmin in Right Ascension and -3.33 arcmin in declination);

Key facts about 47 Librae

5.94
Main-sequence

47 Librae is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -10.5°
Azimuth: 108.1°
Direction: East-South-East

Celestial coordinates and finder chart of 47 Librae

47 Librae is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 47 Librae are provided in the following table:

15h 55m 00s
-19° 22’ 59”
351.65°
25.66°
Libra

The simplified sky map below shows the position of 47 Librae in the sky:

Finder chart 47 Librae star
Simplified finder chart for 47 Librae.

Visibility of 47 Librae from your location

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

Today's 47 Librae rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 109.4°
Max altitude: 19.1°
Azimuth: 250.6°

Distance of 47 Librae from the Sun and relative movement

47 Librae is distant 623.33 light years from the Sun and it is moving towards the Sun at the speed of 7 kilometers per second.

191.20 pc
623.33 ly
-7 km/s
-0.016 arcsec/year
-0.02 arcsec/year

Spectral properties of 47 Librae

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

-0.47
B5V
10252K

The red dot in the diagram below shows where 47 Librae is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 47 Librae. Attribution: Richard Powell / CC BY-SA

47 Librae star system properties

47 Librae is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the 47 Librae double sysyem:

5.94
7.94
2
0.7 arcsec

Alternative designations of 47 Librae

SAO159572
SAO159572