Universe Guide

11 Persei - HD16727 - HIP12692

11 Persei is a blue giant 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. 11 Persei has alternative name(s), 11 Persei.

Location of 11 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 11 Persei, the location is 02h 43m 02.80 and +55 d 06 ` 21.9 .

Physical Properties/View of 11 Persei

11 Persei has a spectral type of B7IIIp.... This means the star is (B) blue coloured (III) giant. 11 Persei lies at a distance of 420.31 light years away from our Sun and our planet Earth or to put it another way, 128.77 parsecs away from the Sun.

11 Persei has an apparent magnitude of 5.76 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. 11 Persei has an absolute magnitude of 0.21 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 10000 and 30000 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.

11 Persei Facts


Traditional Name11 Persei
Alternative Name(s)11 Persei
Hipparcos Library I.D.12692
Henry Draper Designation16727
Celestial TypeStar
Absolute Magnitude0.21
Apparent Magnitude5.76
Right Ascension (R.A.)02h 43m 02.80
Declination (Dec.)+55 d 06 ` 21.9
Distance from the Sun / Earth420.31 Light Years
Spectral TypeB7IIIp...
Colour (B) blue
Star Type (III) giant.
Variable Star ClassConstant, non-variable
Calculated Temperature Range10,000.00 - 30,000.00


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