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HD 51608, HIP33229

HD 51608 is a white to yellow star that can be located in the constellation of Carina. The star can not be seen by the naked eye, you need a telescope to see it.

HIP33229 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD51608. The Gliese ID of the star is GL 253. The star was part of the original catalogue devised by German Astronomer Wilheim Gliese of stars located within 20 parsecs of Earth. Ref : Star Names. HD 51608 has at least 2 Extrasolar Planets believed to be in orbit around the star.

Location of HD 51608

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 HD 51608, the location is 06h 54m 51.37 and -55d 15` 32.2 .

Proper Motion of HD 51608

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 -160.07 ± 0.46 miliarcseconds/year towards the north and -26.45 ± 0.51 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 39.40000 km/s with an error of about 0.20 km/s .

Physical Properties (Colour, Temperature, Radius) of HD 51608

HD 51608 has a spectral type of G7V. This means the star is a white to yellow star. The star is 7403.00000000 Parsecs from the Galactic Centre or terms of Light Years is 24145.8723563200000000s. The star has a B-V Colour Index of 0.77 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 5,364 Kelvin.

HD 51608 Radius has been calculated as being 0.85 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 594,779.78.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 0.87. 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 -0.04 with an error value of 0.03 Fe/H with the Sun has a value of 1 to put it into context.

HD 51608 Apparent and Absolute Magnitudes

HD 51608 has an apparent magnitude of 8.17 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 5.51 If you used the 2007 Parallax value, you would get an absolute magnitude of 5.46. 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 51608

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 29.35 which gave the calculated distance to HD 51608 as 111.13 light years away from Earth or 34.07 parsecs. It would take a spaceship travelling at the speed of light, 111.13 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 28.71 which put HD 51608 at a distance of 113.61 light years or 34.83 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 7,403.00 Parsecs or 24,145.87 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.

HD 51608 Facts

Alternative Names

Traditional/Proper NameHD 51608
Hipparcos Library I.D.33229
Gliese IDGL 253
Henry Draper Designation51608

Visual Facts

Star Type star
Absolute Magnitude5.51 / 5.46
Visual / Apparent Magnitude8.17
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)06h 54m 51.37
Declination (Dec.)-55d 15` 32.2
Galactic Latitude-21.54 degrees
Galactic Longitude265.16 degrees
1997 Distance from Earth29.35 Parallax (milliarcseconds)
 111.13 Light Years
 34.07 Parsecs
2007 Revised Distance from Earth28.71 Parallax (milliarcseconds)
 113.61 Light Years
 34.83 Parsecs
Galacto-Centric Distance24,145.87 Light Years / 7,403.00 Parsecs
Proper Motion Dec.-160.07 ± 0.46 milliarcseconds/year
Proper Motion RA.-26.45 ± 0.51 milliarcseconds/year
B-V Index0.77
Radial Velocity39.40 ± 0.20 km/s
Iron Abundance-0.04 ± 0.03 Fe/H
Spectral TypeG7V
Colour(G) White to Yellow

Companions (Multi-Star and Exoplanets) Facts

Exoplanet Count2

Estimated Facts

Calculated Effective Temperature5,364 Kelvin

Sources and Links

SIMBAD SourceLink

Related Stars

List of Extrasolar Planets orbiting HD 51608

NameStatusMass (Jupiters)Orbital Period (Days)EccentricityDiscoveredSemi-Major AxisPeriastronInclination
HD 51608 bConfirmed0.003114.0700.1520110.10592011.000
HD 51608 cConfirmed0.015295.4150.4120110.37912011.000

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