Universe Guide

10 Leonis - HD83240 - HIP47205

10 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. The Id of the star in the Gould Star Catalogue is . Stars in the southern hemisphere are more likely to have a Gould Id than the northern hemisphere. For example, there are no Gould classified stars in Ursa Major. 10 Leonis has alternative name(s), 10 Leonis.

Location of 10 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 10 Leonis, the location is 09h 37m 12.71 and +06 d 50 ` 08.8 .

Physical Properties/View of 10 Leonis

10 Leonis has a spectral type of K1IIIvar. This means the star is (K) orange to red coloured (III) giant. 10 Leonis lies at a distance of 225.72 light years away from our Sun and our planet Earth or to put it another way, 68.98 parsecs away from the Sun.

10 Leonis has an apparent magnitude of 5.00 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. 10 Leonis has an absolute magnitude of 0.80 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.

10 Leonis Facts


Traditional Name10 Leonis
Alternative Name(s)10 Leonis
Hipparcos Library I.D.47205
Gould I.D.4
Henry Draper Designation83240
Celestial TypeStar
Absolute Magnitude0.80
Apparent Magnitude5.00
Right Ascension (R.A.)09h 37m 12.71
Declination (Dec.)+06 d 50 ` 08.8
Distance from the Sun / Earth225.72 Light Years
Spectral TypeK1IIIvar
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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