ο Librae (omicron Librae)

Above the horizon. Rise: 20:18 | Tran: 0:54 | Set: 5:34

Alt: 22.88° Az: 178.89° Direction: South

ο Librae is a double hypergiant star of spectral class F0 in the constellation of Libra.

ο Librae visual magnitude is 6.3. Because of its faintness, ο 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 ο Librae. The red arrow shows the motion of ο Librae during the next 10000 years (4.00 arcmin in Right Ascension and 4.33 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 15h 22m 26s

Declination -15° 38’ 17”

Hour Angle 23h 55m 44s

Sidereal Time 15h 18m 11s

J2000

Right Ascension 15h 21m 01s

Declination -15° 32’ 53”

Galactic Coordinates

Galactic Longitude 347.81°

Galactic Latitude 33.98°

Finder Chart

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Finder chart for ο Librae (omicron Librae).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.3

Class Hypergiant

Absolute magnitude 2.61

Spectral Type F0III

Color Index (B-V) 0.41

Temperature 6827K

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

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

Star System Properties

ο Librae is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the ο Librae double sysyem:

Main star magnitude 6.3

Secondary star magnitude 8.5

Magnitude difference 2.2

Separation 44.4 arcsec

Distance, Radial Speed, Proper Motion

ο Librae is distant 178.04 light years from the Sun and it is moving far from the Sun at the speed of 5 kilometers per second.

Distance (parsec) 54.61

Distance (light year) 178.04

Radial Speed 5 km/s

Proper Motion RA 0.024 arcsec/y

Proper Motion Dec 0.026"/y

Alternative Designations

Bayer designation ο Librae
(omicron Librae)

Flamsteed designation 29 Librae

Henry Draper Catalogue HD136407

SAO Catalogue SAO159191

Hipparcos Catalogue HIP75118

Durchmusterung Catalogue BD-15 4083

Visibility from Your Location

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

Azimuth: 105.6° RISE 20:18

Max altitude: 22.9° TRANSIT 0:54

Azimuth: 254.4° SET 5:34

Set Location

Other stars in Libra