47 Librae

Above the horizon. Rise: 21:03 | Tran: 1:20 | Set: 5:33

Alt: 1.04° Az: 236.10° Direction: South-West

47 Librae is a variable and double main-sequence star of spectral class B5 in the constellation of Libra.

47 Librae visual magnitude is 5.94. Because of its faintness, 47 Librae is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

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);

Celestial Coordinates

Apparent

Right Ascension 15h 56m 28s

Declination -19° 27’ 21”

Hour Angle 04h 06m 38s

Sidereal Time 20h 03m 06s

J2000

Right Ascension 15h 55m 00s

Declination -19° 22’ 59”

Galactic Coordinates

Galactic Longitude 351.65°

Galactic Latitude 25.66°

Finder Chart

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Finder chart for 47 Librae.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.94

Class Main-sequence

Absolute magnitude -0.47

Spectral Type B5V

Color Index (B-V) -0.01

Temperature 10252K

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

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

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:

Main star magnitude 5.94

Secondary star magnitude 7.94

Magnitude difference 2

Separation 0.7 arcsec

Distance, Radial Speed, Proper Motion

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.

Distance (parsec) 191.20

Distance (light year) 623.33

Radial Speed -7 km/s

Proper Motion RA -0.016 arcsec/y

Proper Motion Dec -0.02"/y

Alternative Designations

Flamsteed designation 47 Librae

Henry Draper Catalogue HD142378

SAO Catalogue SAO159572

Hipparcos Catalogue HIP77939

Durchmusterung Catalogue BD-18 4195

General Catalogue of Variable Stars 7327

Aitken Double Star Catalogue ADS9834

Visibility from Your Location

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

Azimuth: 109.5° RISE 21:03

Max altitude: 19.1° TRANSIT 1:20

Azimuth: 250.5° SET 5:33

Set Location

Other stars in Libra