Universe Guide

13 Leonis - HD83821 - HIP47550

13 Leonis is an orange to red giant star that can be located in the constellation of Leo. 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. 13 Leonis has alternative name(s), 13 Leonis.

Location of 13 Leonis

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 13 Leonis, the location is 09h 41m 38.50 and +25 d 54 ` 46.6 .

Physical Properties/View of 13 Leonis

13 Leonis has a spectral type of K2III:. This means the star is (K) orange to red coloured (III) giant. 13 Leonis lies at a distance of 540.90 light years away from our Sun and our planet Earth or to put it another way, 165.56 parsecs away from the Sun.

13 Leonis has an apparent magnitude of 6.26 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. 13 Leonis has an absolute magnitude of 0.16 which is the apparent magnitude of an object if it were 32.6 light years away or 10 parsecs from Earth. 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 3700 and 5200 based on the Class Type and lookup at Wikipedia-Stellar Classification

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.

13 Leonis Facts


Traditional Name13 Leonis
Alternative Name(s)13 Leonis
Hipparcos Library I.D.47550
Henry Draper Designation83821
Celestial TypeStar
Absolute Magnitude0.16
Apparent Magnitude6.26
Right Ascension (R.A.)09h 41m 38.50
Declination (Dec.)+25 d 54 ` 46.6
Distance from the Sun / Earth540.90 Light Years
Spectral TypeK2III:
Colour (K) orange to red
Star Type (III) giant.
Variable Star ClassConstant, non-variable
Calculated Temperature Range3,700.00 - 5,200.00


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