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Psi6 Aurigae, 57 Aurigae, HD48781, HIP32562, HR2487

Psi6 Aurigae is a orange to red star that can be located in the constellation of Auriga. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.

Psi6 Aurigae is the Bayer Classification for the star. The Id of the star in the Yale Bright Star Catalogue is HR2487. HIP32562 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD48781.

Location of Psi6 Aurigae

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 Psi6 Aurigae, the location is 06h 47m 39.58 and +48d 47` 22.1 .

Proper Motion of Psi6 Aurigae

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 7.19 ± 0.22 miliarcseconds/year towards the north and -4.32 ± 0.38 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 -6.51000 km/s with an error of about 0.30 km/s .

Psi6 Aurigae 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 82.0000000 that I have given is based on the Spectral Types page that I have found on the Internet. You might find a different figure, one that may have been calculated rather than generalised that I have done. The figure is always the amount times the luminosity of the Sun. It is an imprecise figure because of a number of factors including but not limited to whether the star is a variable star and distance.

Physical Properties (Colour, Temperature, Radius) of Psi6 Aurigae

Psi6 Aurigae has a spectral type of K1III. This means the star is a orange to red star. The star is 7502.00000000 Parsecs from the Galactic Centre or terms of Light Years is 24468.7740668800000000s. The star has a B-V Colour Index of 1.13 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 4,611 Kelvin.

Psi6 Aurigae Radius has been calculated as being 17.19 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 11,961,923.54.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 14.63. 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 -0.07 with an error value of 0.04 Fe/H with the Sun has a value of 1 to put it into context.

Psi6 Aurigae Apparent and Absolute Magnitudes

Psi6 Aurigae has an apparent magnitude of 5.22 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 -0.35 If you used the 2007 Parallax value, you would get an absolute magnitude of 0.00. 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 Psi6 Aurigae

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 7.69 which gave the calculated distance to Psi6 Aurigae as 424.14 light years away from Earth or 130.04 parsecs. It would take a spaceship travelling at the speed of light, 424.14 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 9.05 which put Psi6 Aurigae at a distance of 360.40 light years or 110.50 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 7,502.00 Parsecs or 24,468.77 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.

Psi6 Aurigae Facts

Alternative Names

Flamsteed Name57 Aurigae
Flamsteed Short Name57 Aur
Bayer DesignationPsi6 Aurigae
Hipparcos Library I.D.32562
Yale Bright Star Catalogue (HR) Id2487
Bonner DurchmusterungBD+48 1436
Henry Draper Designation48781

Visual Facts

Star Type star
Absolute Magnitude-0.35 / 0.00
Visual / Apparent Magnitude5.22
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)06h 47m 39.58
Declination (Dec.)+48d 47` 22.1
Galactic Latitude19.47 degrees
Galactic Longitude167.26 degrees
1997 Distance from Earth7.69 Parallax (milliarcseconds)
 424.14 Light Years
 130.04 Parsecs
2007 Revised Distance from Earth9.05 Parallax (milliarcseconds)
 360.40 Light Years
 110.50 Parsecs
Galacto-Centric Distance24,468.77 Light Years / 7,502.00 Parsecs
Proper Motion Dec.7.19 ± 0.22 milliarcseconds/year
Proper Motion RA.-4.32 ± 0.38 milliarcseconds/year
B-V Index1.13
Radial Velocity-6.51 ± 0.30 km/s
Iron Abundance-0.07 ± 0.04 Fe/H
Spectral TypeK1III
Associated / Clustered StarsPsi1 Aurigae
Psi2 Aurigae
Psi3 Aurigae
Psi4 Aurigae
Psi5 Aurigae
Psi9 Aurigae
Colour(K) Orange to Red

Estimated Facts

Luminosity (x the Sun)82.0000000
Calculated Effective Temperature4,611 Kelvin

Sources and Links

SIMBAD SourceLink

Related Stars

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