Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:45  
clear_day Transit: 12:57  
SunsetSet: 21:09 south
sunny DaytimeWhat's Visible Now
All Constellations » Libra » 

47 Librae

Altitude: -23.3°   Azimuth: 267.8°   Direction: West

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 skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 47 Librae:


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

Altitude: -23.3°
Azimuth: 267.8°
Direction: West

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”

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°
47 Librae is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 47 Librae

The image below is a photograph of 47 Librae 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 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);

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.


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:

0.7 arcsec

Alternative designations of 47 Librae