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HD 303250 (Red Supergiant Star) Facts

HD 303250 Facts

HD 303250's Alternative Names

The Id of the star in the Henry Draper catalogue is HD303250.

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 CD-57 3459.

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

Location of HD 303250

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 303250, the location is 10 44 20.0403665356 and -58 03 53.452795608 .

Radial Velocity and Proper Motion of HD 303250

Proper Motion

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 -6.88 milliarcseconds/year towards the north and -6.88 milliarcseconds/year east if we saw them in the horizon.

Radial Velocity

The Radial Velocity, that is the speed at which the star is moving away/towards the Sun is 2.94 km/s . When the value is negative then the star and the Sun are getting closer to one another, likewise, a positive number means that two stars are moving away. Its nothing to fear as the stars are so far apart, they won't collide in our life-time, if ever.

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Additional HD 303250 Facts and Figures

Visual Facts


Primary / Proper / Traditional NameHD 303250
Alternative NamesHD 303250, CD-57 3459
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeStar
GalaxyMilky Way
ConstellationCarina
Right Ascension (R.A.)10 44 20.0403665356
Declination (Dec.)-58 03 53.452795608
Distance from Earth0.40 Parallax (milliarcseconds)
 8101.42 Light Years
 2483.85 Parsecs
 512,327,269.05 Astronomical Units
Proper Motion Dec.-6.88 milliarcseconds/year
Proper Motion RA.-6.88 milliarcseconds/year
Radial Velocity2.94 km/s

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Sources and Links


Sourcehttp://simbad.u-strasbg.fr/simbad/sim-id?Ident=hd%20303250

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