α1 Librae (alpha1 Librae)

Below the horizon. Rise: 19:23 | Tran: 23:56 | Set: 4:34

Alt: -34.76° Az: 289.25° Direction: West-North-West

α1 Librae is a multiple sub-giant star of spectral class F4 in the constellation of Libra.

α1 Librae visual magnitude is 5.15. Because of its faintness, α1 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 α1 Librae. The red arrow shows the motion of α1 Librae during the next 1000 years (-1.63 arcmin in Right Ascension and -1.10 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 14h 52m 05s

Declination -16° 06’ 02”

Hour Angle 08h 24m 40s

Sidereal Time 23h 16m 46s

J2000

Right Ascension 14h 50m 41s

Declination -15° 59’ 49”

Galactic Coordinates

Galactic Longitude 340.31°

Galactic Latitude 38.07°

Finder Chart

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Finder chart for α1 Librae (alpha1 Librae).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.15

Class Sub-giant

Absolute magnitude 3.28

Spectral Type F4IV

Color Index (B-V) 0.41

Temperature 6827K

The red dot in the diagram below shows where α1 Librae is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of α1 Librae. Attribution: Richard Powell / CC BY-SA

Star System Properties

α1 Librae 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 α1 Librae double sysyem:

Main star magnitude 5.15

Secondary star magnitude 5.55

Magnitude difference 0.4

Separation 0 arcsec

Distance, Radial Speed, Proper Motion

α1 Librae is distant 77.14 light years from the Sun and it is moving towards the Sun at the speed of 23 kilometers per second.

Distance (parsec) 23.66

Distance (light year) 77.14

Radial Speed -23 km/s

Proper Motion RA -0.098 arcsec/y

Proper Motion Dec -0.066"/y

Alternative Designations

Bayer designation α1 Librae
(alpha1 Librae)

Flamsteed designation 8 Librae

Henry Draper Catalogue HD130819

SAO Catalogue SAO158836

Hipparcos Catalogue HIP72603

Durchmusterung Catalogue BD-15 3965

Gliese Catalogue Gl 563.4

FK5 Catalogue 1387

Visibility from Your Location

Today's α1 Librae (alpha1 Librae) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 106.1° RISE 19:23

Max altitude: 22.4° TRANSIT 23:56

Azimuth: 253.9° SET 4:34

Set Location

Other stars in Libra