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56 Orionis, HD39400, HIP27750, HR2037

56 Orionis is a orange to red star that can be located in the constellation of Orion. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.

The Id of the star in the Yale Bright Star Catalogue is HR2037. HIP27750 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD39400.

Location of 56 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 along the celestial equator. If the R.A. is positive then its eastwards. The Declination is how far north or south the star is compared to the celestial equator and is expressed in degrees. For 56 Orionis, the location is 05h 52m 26.44 and +01d 51` 18.6 .

Proper Motion of 56 Orionis

All stars like planets orbit round a central spot, in the case of planets, its the central star such as the Sun. In the case of a star, its the galactic centre. The constellations that we see today will be different than they were 50,000 years ago or 50,000 years from now. Proper Motion details the movements of these stars and are measured in milliarcseconds. The star is moving -8.24 ± 0.19 miliarcseconds/year towards the north and -7.16 ± 0.30 miliarcseconds/year east if we saw them in the horizon. The Radial Velocity, that is the speed at which the star is moving away/towards us is 11.56000 km/s with an error of about 0.19 km/s .

Physical Properties (Colour, Temperature, Radius) of 56 Orionis

56 Orionis has a spectral type of K2IIvar. This means the star is a orange to red star. The star is 7740.00000000 Parsecs from the Galactic Centre or terms of Light Years is 25245.0428256000000000s. The star has a B-V Colour Index of 1.38 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 4,245 Kelvin.

56 Orionis Radius has been calculated as being 65.94 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 45,883,972.42.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 74.33. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures. The star's Iron Abundance is -0.19 with an error value of 9.99 Fe/H with the Sun has a value of 1 to put it into context.

56 Orionis Apparent and Absolute Magnitudes

56 Orionis has an apparent magnitude of 4.76 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. If you used the 1997 Parallax value, you would get an absolute magnitude of -2.91 If you used the 2007 Parallax value, you would get an absolute magnitude of -3.17. 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.

Distance to 56 Orionis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 2.93 which gave the calculated distance to 56 Orionis as 1113.19 light years away from Earth or 341.30 parsecs. It would take a spaceship travelling at the speed of light, 1113.19 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

In 2007, Hipparcos data was revised with a new parallax of 2.59 which put 56 Orionis at a distance of 1259.32 light years or 386.10 parsecs. It should not be taken as though the star is moving closer or further away from us. It is purely that the distance was recalculated.

The star's Galacto-Centric Distance is 7,740.00 Parsecs or 25,245.04 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.

Source of Information

The source of the information if it has a Hip I.D. is 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. The items in red are values that I've calculated so they could well be wrong. Information regarding Metallicity and/or Mass is from the E.U. Exoplanets. The information was obtained as of 12th Feb 2017.

56 Orionis Facts

Alternative Names

Traditional/Proper Name56 Orionis
Flamsteed Name56 Orionis
Flamsteed Short Name56 Ori
Hipparcos Library I.D.27750
Yale Bright Star Catalogue (HR) Id2037
Bonner DurchmusterungBD+01 1151
Henry Draper Designation39400

Visual Facts

Star Type star
Absolute Magnitude-2.91 / -3.17
Visual / Apparent Magnitude4.76
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)05h 52m 26.44
Declination (Dec.)+01d 51` 18.6
Galactic Latitude-12.22 degrees
Galactic Longitude204.41 degrees
1997 Distance from Earth2.93 Parallax (milliarcseconds)
 1113.19 Light Years
 341.30 Parsecs
2007 Revised Distance from Earth2.59 Parallax (milliarcseconds)
 1259.32 Light Years
 386.10 Parsecs
Galacto-Centric Distance25,245.04 Light Years / 7,740.00 Parsecs
Proper Motion Dec.-8.24 ± 0.19 milliarcseconds/year
Proper Motion RA.-7.16 ± 0.30 milliarcseconds/year
B-V Index1.38
Radial Velocity11.56 ± 0.19 km/s
Iron Abundance-0.19 ± 9.99 Fe/H
Spectral TypeK2IIvar
Colour(K) Orange to Red

Estimated Facts

Calculated Effective Temperature4,245 Kelvin

Sources and Links

SIMBAD SourceLink

Related Stars

Multi-Star System

The star has been identified as being a multi-star system, one in which there is at least one star in close orbit to another star or two or more stars orbiting a central point. The stars may be of equal mass, unequal mass where one star is stronger than the other or be in groups orbiting a central point which doesn't necessarily have to be a star. More information can be found on my dedicated multiple star systems page. The source of the info is Simbad. The file is dated 2000 so any differences between this and any other source will be down to the actual source from where the information came from.

Proper Motion mas/yr
H.D. IdB.D. IdStar CodeMagnitudeR.A.Dec.SpectrumColourYear
39400+01 1151.0A5.00000-15.00000-6.00000K0Orange

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