Universe Guide

11 Bootis - HD122405 - HIP68478

11 Bootis is a blue giant star that can be located in the constellation of Bootes. 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 Bootis has alternative name(s), 11 Bootis.

Location of 11 Bootis

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 Bootis, the location is 14h 01m 10.53 and +27 d 23 ` 11.6 .

Physical Properties/View of 11 Bootis

11 Bootis has a spectral type of A7III. This means the star is (A) blue coloured (III) giant. 11 Bootis lies at a distance of 340.11 light years away from our Sun and our planet Earth or to put it another way, 104.24 parsecs away from the Sun.

11 Bootis has an apparent magnitude of 6.23 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. 11 Bootis has an absolute magnitude of 1.14 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.

11 Bootis Facts


Traditional Name11 Bootis
Alternative Name(s)11 Bootis
Hipparcos Library I.D.68478
Henry Draper Designation122405
Celestial TypeStar
Absolute Magnitude1.14
Apparent Magnitude6.23
Right Ascension (R.A.)14h 01m 10.53
Declination (Dec.)+27 d 23 ` 11.6
Distance from the Sun / Earth340.11 Light Years
Spectral TypeA7III
Colour (A) blue
Star Type (III) giant.
Variable Star ClassConstant, non-variable
Calculated Temperature Range7,500.00 - 10,000.00


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