Universe Guide

12 Persei - HD16739 - HIP12623

12 Persei is a blue to white main sequence dwarf star that can be located in the constellation of Perseus. 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. 12 Persei has alternative name(s), 12 Persei.

Location of 12 Persei

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 12 Persei, the location is 02h 42m 14.93 and +40 d 11 ` 39.8 .

Physical Properties/View of 12 Persei

12 Persei has a spectral type of F9V. This means the star is (F) blue to white coloured (V) main sequence (dwarf star). 12 Persei lies at a distance of 80.49 light years away from our Sun and our planet Earth or to put it another way, 24.53 parsecs away from the Sun.

12 Persei has an apparent magnitude of 4.91 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. 12 Persei has an absolute magnitude of 2.95 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 star's temperature has been calculated at being about 5900 Kelvin. (Based on the b-v value of 0.58 and the lookup on SDSS.)

12 Persei Radius has been calculated as being 2.30 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 1,598,287.39. km.

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.

12 Persei Facts


Traditional Name12 Persei
Alternative Name(s)12 Persei
Hipparcos Library I.D.12623
Henry Draper Designation16739
Celestial TypeStar
Absolute Magnitude2.95
Apparent Magnitude4.91
Right Ascension (R.A.)02h 42m 14.93
Declination (Dec.)+40 d 11 ` 39.8
Distance from the Sun / Earth80.49 Light Years
Spectral TypeF9V
Colour (F) blue to white
Star Type (IV) subgiant.
Variable Star ClassConstant, non-variable
Radius (x the Sun)2.30
Calculated Temperature Range6,000.00 - 7,500.00


Add a Comment


Name:
Email: (Optional)
Comment: