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VY Librae, HIP77663

VY Librae is a pulsating variable star that can be located in the constellation of Libra. The description is based on the spectral class. VY Librae is not part of the constellation but is within the borders of the constellation.

VY Librae's Alternative Names

HIP77663 is the reference name for the star in the Hipparcos Star Catalogue.

VY Librae has alternative name(s) :- , VY Lib.

More details on star alternative names can be found at Star Names .

Radial Velocity and Proper Motion of VY Librae

All stars like planets orbit round a central spot, in the case of planets, its the central star such as the Sun. In the case of a star, its the galactic centre. The constellations that we see today will be different than they were 50,000 years ago or 50,000 years from now. Proper Motion details the movements of these stars and are measured in milliarcseconds. The star is moving -49.23 ± 1.63 miliarcseconds/year towards the north and 1.15 ± 3.05 miliarcseconds/year east if we saw them in the horizon.

The Radial Velocity, that is the speed at which the star is moving away/towards the Sun is 151.00 km/s with an error of about 6.00 km/s . When the value is negative then the star and the Sun are getting closer to one another, likewise, a positive number means that two stars are moving away. Its nothing to fear as the stars are so far apart, they won't collide in our life-time, if ever.

Source of Information

The source of the information if it has a Hip I.D. is from Simbad, the Hipparcos data library based at the University at Strasbourg, France. Hipparcos was a E.S.A. satellite operation launched in 1989 for four years. The items in red are values that I've calculated so they could well be wrong. Information regarding Metallicity and/or Mass is from the E.U. Exoplanets. The information was obtained as of 12th Feb 2017.

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VY Librae Facts

Visual Facts


Primary / Proper / Traditional NameVY Librae
Alternative NamesHIP 77663, VY Lib
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeVariable Star
GalaxyMilky Way
ConstellationLibra
Galactic Latitude28.84 degrees
Galactic Longitude353.86 degrees
Distance from Earth1.80 Parallax (milliarcseconds)
 1812.02 Light Years
 555.56 Parsecs
 114,591,677.27 Astronomical Units
Proper Motion Dec.-49.23 ± 1.63 milliarcseconds/year
Proper Motion RA.1.15 ± 3.05 milliarcseconds/year
Radial Velocity151.00 ± 6.00 km/s
Iron Abundance-1.30 ± 9.99 Fe/H

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Variable Star ClassPulsating
Variable Star TypeRR Lyrae type with a
Mean Variability Period in Days0.534
Variable Magnitude Range (Brighter - Dimmer)11.183 - 12.219

Sources and Links


SIMBAD SourceLink

Related Stars


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