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AM Virginis

AM Virginis Facts

AM Virginis's Alternative Names

HIP65344 is the reference name for the star in the Hipparcos Star Catalogue.

AM Virginis has alternative name(s) :- AM Vir, AM Vir.

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

Location of AM Virginis

The location of the variable star in the night sky is determined by the Right Ascension (R.A.) and Declination (Dec.), these are equivalent to the Longitude and Latitude on the Earth. The Right Ascension is how far expressed in time (hh:mm:ss) the star is along the celestial equator. If the R.A. is positive then its eastwards. The Declination is how far north or south the object is compared to the celestial equator and is expressed in degrees. For AM Virginis, the location is 13h 23m 33.33 and -16° 39` 57.5 .

Physical Properties (Colour) of AM Virginis

AM Virginis Colour and Temperature

AM Virginis has a spectral type of A6. This means the star is a blue - white variable star. The star's Iron Abundance is -1.36 with an error value of 9.99 Fe/H with the Sun has a value of 1 to put it into context.

AM Virginis Apparent and Absolute Magnitudes

AM Virginis has an apparent magnitude of 11.60 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. Using the supplied Parallax value, you would get an absolute magnitude of Magnitude, whether it be apparent/visual or absolute magnitude is measured by a number, the smaller the number, the brighter the Star is. Our own Sun is the brightest star and therefore has the lowest of all magnitudes, -26.74. A faint star will have a high number.

Distance to AM Virginis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as -3.25 which gave the calculated distance to AM Virginis as -1003.58 light years away from Earth or -307.69 parsecs. It would take a spaceship travelling at the speed of light, -1003.58 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

Variable Type of AM Virginis

The star is a pulsating RR Lyrae type with a variable type which means that its size changes over time. The Variable Type is usually named after the first star of that type to be spotted. AM Virginis brightness ranges from a magnitude of 11.979 to a magnitude of 11.103 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.6 days (variability).

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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Additional AM Virginis Facts and Figures

Visual Facts


Primary / Proper / Traditional NameAM Virginis
Alternative NamesAM Vir, HIP 65344, AM Vir
Spectral TypeA6
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeVariable Star
ColourBlue
GalaxyMilky Way
ConstellationVirgo
Visual / Apparent Magnitude11.60
Naked Eye VisibleRequires a 4.5 - 6 Inch Telescope - Magnitudes
Right Ascension (R.A.)13h 23m 33.33
Declination (Dec.)-16° 39` 57.5
Galactic Latitude45.52 degrees
Galactic Longitude313.94 degrees
Distance from Earth-3.25 Parallax (milliarcseconds)
 -1003.58 Light Years
 -307.69 Parsecs
 -63,465,176.00 Astronomical Units
B-V Index-99.00
Radial Velocity98.50 ± 2.90 km/s
Iron Abundance-1.36 ± 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 Days0.615
Variable Magnitude Range (Brighter - Dimmer)11.103 - 11.979

Sources and Links


SIMBAD SourceLink

Related Stars


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