Universe Guide

10 Serpentis - HD137898 - HIP75761

10 Serpentis is a blue subgiant star that can be located in the constellation of Serpens. 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 Serpentis has alternative name(s), 10 Serpentis.

Location of 10 Serpentis

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 Serpentis, the location is 15h 28m 38.29 and +01 d 50 ` 31.8 .

Physical Properties/View of 10 Serpentis

10 Serpentis has a spectral type of A8IV. This means the star is (A) blue coloured (IV) subgiant. 10 Serpentis lies at a distance of 122.25 light years away from our Sun and our planet Earth or to put it another way, 37.40 parsecs away from the Sun.

10 Serpentis has an apparent magnitude of 5.15 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. 10 Serpentis has an absolute magnitude of 2.28 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 7500 and 10000 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 Serpentis Facts


Traditional Name10 Serpentis
Alternative Name(s)10 Serpentis
Hipparcos Library I.D.75761
Gould I.D.13 Cap
Henry Draper Designation137898
Celestial TypeStar
Absolute Magnitude2.28
Apparent Magnitude5.15
Right Ascension (R.A.)15h 28m 38.29
Declination (Dec.)+01 d 50 ` 31.8
Distance from the Sun / Earth122.25 Light Years
Spectral TypeA8IV
Colour (A) blue
Star Type (VI) subdwarf star.
Variable Star ClassConstant, non-variable
Calculated Temperature Range7,500.00 - 10,000.00


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