Universe Guide

101 Virginis - HD125180 - HIP69829

101 Virginis is a red giant star that can be located in the constellation of Bootes. HIP is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD.

Location of 101 Virginis

The location of the star in the galaxy 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 from celestial equator. The Declination is how up or down compared to the celestial equator and is expressed in degrees. For 101 Virginis, the location is 14h 17m 28.44 and +15 d 15`48.1 .

Physical Properties/View of 101 Virginis

101 Virginis has a spectral type of M3III. This means the star is (M) red coloured (III) giant. 101 Virginis lies at a distance of 1,012.93 light years away from our Sun and our planet Earth or to put it another way, 310.27 parsecs away from the Sun.

101 Virginis has an apparent magnitude of 5.84 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. 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. The stars temperature has been calculated at between 2400 and 3700 based on the Class Type and lookup at Wikipedia-Stellar Classification 101 Virginis brightness ranges from a magnitude of 6.000 to a magnitude of 6.000 over its variable period. The smaller the magnitude, the brighter the star.

Source of Information

The source of the information came 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.

101 Virginis Facts


Traditional Name101 Virginis
Short NameCY Boo
Hipparcos Library I.D.69829
Henry Draper Designation125180
Celestial TypeStar
Apparent Magnitude5.84
Right Ascension (R.A.)14h 17m 28.44
Declination (Dec.)+15 d 15`48.1
Distance from the Sun / Earth1,012.93 Light Years
Spectral TypeM3III
Colour (M) red
Star Type (III) giant.
Variable Star ClassConstant, non-variable
Variable Magnitude Range (Brighter - Dimmer)6.000 - 6.000
Calculated Temperature Range2,400.00 - 3,700.00


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