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HD 46223

HD 46223 Facts

HD 46223's Alternative Names

HIP31149 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD46223.

BD number is the number that the star was filed under in the Durchmusterung or Bonner Durchmusterung, a star catalogue that was put together by the Bonn Observatory between 1859 to 1903. The star's BD Number is BD+04 1302.

More details on objects' alternative names can be found at Star Names .

Location of HD 46223

The location of the star in the night sky 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 object is compared to the celestial equator and is expressed in degrees. For HD 46223, the location is 06h 32m 09.31 and +04° 49` 24.7 .

Physical Properties (Colour, Temperature) of HD 46223

HD 46223 Colour and Temperature

HD 46223 has a spectral type of O5e. This means the star is a blue star. The star has a B-V Colour Index of 0.14 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 7,950 Kelvin.

HD 46223 Radius

Radius has been calculated as being 30.08 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 20,926,285.97.km. If you need the diameter of the star, you just need to multiple the radius by 2. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

HD 46223 Apparent and Absolute Magnitudes

HD 46223 has an apparent magnitude of 7.29 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. Using the supplied Parallax value, you would get an absolute magnitude of -3.93 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 HD 46223

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 0.57 which gave the calculated distance to HD 46223 as 5722.16 light years away from Earth or 1754.39 parsecs. It would take a spaceship travelling at the speed of light, 5722.16 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

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.

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Additional HD 46223 Facts and Figures

Visual Facts


Primary / Proper / Traditional NameHD 46223
Alternative NamesHD 46223, HIP 31149, BD+04 1302
Spectral TypeO5e
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeStar
ColourBlue
GalaxyMilky Way
ConstellationMonoceros
Absolute Magnitude -3.93
Visual / Apparent Magnitude7.29
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)06h 32m 09.31
Declination (Dec.)+04° 49` 24.7
Galactic Latitude-2.07 degrees
Galactic Longitude206.44 degrees
Distance from Earth0.57 Parallax (milliarcseconds)
 5722.16 Light Years
 1754.39 Parsecs
 361,866,391.91 Astronomical Units
B-V Index0.14
Radial Velocity38.20 ± 2.60 km/s

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Calculated Facts


Radius (x the Sun)30.08
Effective Temperature7,950 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


Comments and Questions

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