Universe Guide

11 Orionis - HD32549 - HIP23607

11 Orionis is a blue rotating less luminour star that can be located in the constellation of Orion. 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 Orionis has alternative name(s), 11 Orionis.

Location of 11 Orionis

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 Orionis, the location is 05h 04m 34.14 and +15 d 24 ` 15.1 .

Physical Properties/View of 11 Orionis

11 Orionis has a spectral type of A0p Si. This means the star is (A) blue coloured 11 Orionis lies at a distance of 400.20 light years away from our Sun and our planet Earth or to put it another way, 122.64 parsecs away from the Sun.

11 Orionis has an apparent magnitude of 4.65 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. 11 Orionis has an absolute magnitude of -0.79 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

Variable Type of 11 Orionis

The star is a rotating Alpha2 Canum Venaticorum variable type which means that its size changes over time. The Variable Type is usually named after the first star of that type to be spotted. 11 Orionis brightness ranges from a magnitude of 5.000 to a magnitude of 5.000 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 5.0 days (variability).

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 Orionis Facts


Traditional Name11 Orionis
Short NameV1032 Ori
Alternative Name(s)11 Orionis
Hipparcos Library I.D.23607
Henry Draper Designation32549
Celestial TypeStar
Absolute Magnitude-0.79
Apparent Magnitude4.65
Right Ascension (R.A.)05h 04m 34.14
Declination (Dec.)+15 d 24 ` 15.1
Distance from the Sun / Earth400.20 Light Years
Spectral TypeA0p Si
Colour (A) blue
Star Type Undetermined
Variable Star ClassRotating
Variable Star TypeAlpha2 Canum Venaticorum
Mean Variability Period in Days5.000
Variable Magnitude Range (Brighter - Dimmer)5.000 - 5.000
Calculated Temperature Range7,500.00 - 10,000.00


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