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HD 173219

HD 173219 Facts

HD 173219's Alternative Names

HIP91946 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD173219.

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-07 4689.

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

Location of HD 173219

The location of the main sequence 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 173219, the location is 18h 44m 33.34 and -07° 06` 38.1 .

Physical Properties (Colour, Temperature) of HD 173219

HD 173219 Colour and Temperature

HD 173219 has a spectral type of B1:V:npe. This means the star is a blue main sequence star. The star has a B-V Colour Index of 0.2 which means the star's temperature is about 7,767 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu at being .

HD 173219 Apparent and Absolute Magnitudes

HD 173219 has an apparent magnitude of 7.82 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 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 173219

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as -1.41 which gave the calculated distance to HD 173219 as -2313.22 light years away from Earth or -709.22 parsecs. If you want that in miles, it is -1,551,283,798,535.

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 173219 Facts and Figures

Visual Facts


Primary / Proper / Traditional NameHD 173219
Alternative NamesHD 173219, HIP 91946, BD-07 4689
Spectral TypeB1:V:npe
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star Type Main Sequence Dwarf Star
ColourBlue
GalaxyMilky Way
ConstellationScutum
Visual / Apparent Magnitude7.82
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)18h 44m 33.34
Declination (Dec.)-07° 06` 38.1
Galactic Latitude-1.71 degrees
Galactic Longitude25.82 degrees
Distance from Earth-1.41 Parallax (milliarcseconds)
 -2313.22 Light Years
 -709.22 Parsecs
 -146,286,106.55 Astronomical Units
B-V Index0.20
Radial Velocity26.00 ± 7.40 km/s

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Calculated Facts


Effective Temperature7,767 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


Comments and Questions

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