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HIP 32959, HD49930

HIP 32959 Facts

HIP 32959's Alternative Names

HIP32959 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD49930.

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+26 1375.

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

Location of HIP 32959

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 HIP 32959, the location is 06h 51m 53.38 and +26° 24` 01.3 .

Proper Motion of HIP 32959

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 -54.62 ± 0.40 milliarcseconds/year towards the north and -0.58 ± 0.80 milliarcseconds/year east if we saw them in the horizon. . 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.

HIP 32959 Luminosity

Luminosity is the amount of energy that a star pumps out and its relative to the amount that our star, the Sun gives out. The figure of 7.40 that I have given is based on the value in the Simbad Hipparcos Extended Catalogue at the University of Strasbourg from 2012.

Physical Properties (Colour, Temperature) of HIP 32959

HIP 32959 Colour and Temperature

HIP 32959 has a spectral type of A3. This means the star is a blue - white star. The star has a B-V Colour Index of 0.27 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 6,943 Kelvin.

HIP 32959 Radius

Radius has been calculated as being 2.01 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 1,400,453.40.km. If you need the diameter of the star, you just need to multiple the radius by 2. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 1.95. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

HIP 32959 Apparent and Absolute Magnitudes

HIP 32959 has an apparent magnitude of 7.96 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 2.53 If you used the 2007 Parallax value, you would get an absolute magnitude of 2.60. 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 HIP 32959

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 8.22 which gave the calculated distance to HIP 32959 as 396.79 light years away from Earth or 121.65 parsecs. If you want that in miles, it is 2,263,741,058,705,540.69.

In 2007, Hipparcos data was revised with a new parallax of 8.47 which put HIP 32959 at a distance of 385.08 light years or 118.06 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.

Using the 2007 distance, the star is roughly 24,351,453.34 Astronomical Units from the Earth/Sun give or take a few. An Astronomical Unit is the distance between Earth and the Sun. The number of A.U. is the number of times that the star is from the Earth compared to the Sun.

The star's Galacto-Centric Distance is 7,513.00 Parsecs or 24,504.65 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.

Time to Travel to HIP 32959

A note about the calculations, when I'm talking about years, I'm talking non-leap years only (365 days).

If you were to drive there at about 120 m.p.h. in a car with an infinity engine so you didn't have to pull over for petrol, it would take you 19,438,164,681,879.34 hours or 2,218,968,570.99 years.

At the time of writing, the fastest probe so far created is the New Horizon probe which is travelling at a speed of 33,000 m.p.h. If the probe was travelling to HIP 32959 then it would take 70,684,235,206.83 hours / 8,068,976.62 years to get there. Speed Ref: N.A.S.A.

It would to take a spaceship journey travelling at the speed of light, 396.79 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 HIP 32959 Facts and Figures

Visual Facts


Primary / Proper / Traditional NameHIP 32959
Alternative NamesHD 49930, HIP 32959, BD+26 1375
Spectral TypeA3
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeStar
ColourBlue
GalaxyMilky Way
ConstellationGemini
Absolute Magnitude 2.53 / 2.60
Visual / Apparent Magnitude7.96
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)06h 51m 53.38
Declination (Dec.)+26° 24` 01.3
Galactic Latitude11.79 degrees
Galactic Longitude189.14 degrees
1997 Distance from Earth8.22 Parallax (milliarcseconds)
 396.79 Light Years
 121.65 Parsecs
2007 Distance from Earth8.47 Parallax (milliarcseconds)
 385.08 Light Years
 118.06 Parsecs
 24,351,453.34 Astronomical Units
Galacto-Centric Distance24,504.65 Light Years / 7,513.00 Parsecs
Proper Motion Dec.-54.62 ± 0.40 milliarcseconds/year
Proper Motion RA.-0.58 ± 0.80 milliarcseconds/year
B-V Index0.27
Stellar Luminosity (Lsun)7.40

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Calculated Facts


Radius (x the Sun)1.95
Effective Temperature6,943 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


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