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Kappa Pavonis - HD174694 - HIP93015

Kappa Pavonis is a blue to white pulsating luminous giant star that can be located in the constellation of Pavo. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.

Kappa Pavonis is the Bayer Classification for the star. HIP93015 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD174694.

Kappa Pavonis has alternative name(s), kap_Pav.

Location of Kappa Pavonis

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 Kappa Pavonis, the location is 18h 56m 57.04 and -67d14`00.7 .

Proper Motion of Kappa Pavonis

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 16.47 ± 0.54 miliarcseconds/year towards the north and -8.46 ± 0.77 miliarcseconds/year east if we saw them in the horizon.

Physical Properties (Colour, Temperature, Radius) of Kappa Pavonis

Kappa Pavonis has a spectral type of F5Ib-II:. This means the star is a blue to white luminous giant star. The star is 7285.00000000 Parsecs from the Galactic Centre or terms of Light Years is 23760.9996104000000000s. The star has a B-V Colour Index of 0.53 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 6,040 Kelvin.

Kappa Pavonis Radius has been calculated as being 18.74 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 13,041,595.95.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 17.25. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

Kappa Pavonis Apparent and Absolute Magnitudes

Kappa Pavonis has an apparent magnitude of 4.40 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 -1.71 If you used the 2007 Parallax value, you would get an absolute magnitude of -1.53. 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 Kappa Pavonis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 6.00 which gave the calculated distance to Kappa Pavonis as 543.61 light years away from Earth or 166.67 parsecs. It would take a spaceship travelling at the speed of light, 543.61 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 6.52 which put Kappa Pavonis at a distance of 500.25 light years or 153.37 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 7,285.00 Parsecs or 23,761.00 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.

Variable Type of Kappa Pavonis

The star is a pulsating Cepheids variable type which means that its size changes over time. The Variable Type is usually named after the first star of that type to be spotted. Kappa Pavonis brightness ranges from a magnitude of 5.000 to a magnitude of 4.000 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 9.0 days (variability).

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.

Kappa Pavonis Facts

Alternative Names

Short Namekap Pav
Bayer DesignationKappa Pavonis
Hipparcos Library I.D.93015
Henry Draper Designation174694

Visual Facts

Star Typeluminous giant star
Absolute Magnitude-1.71 / -1.53
Visual / Apparent Magnitude4.40
Naked Eye VisibleYes - Ref: Wiki
Right Ascension (R.A.)18h 56m 57.04
Declination (Dec.)-67d14`00.7
Galactic Latitude-25.39 degrees
Galactic Longitude328.29 degrees
1997 Distance from Earth6.00 Parallax (milliarcseconds)
 543.61 Light Years
 166.67 Parsecs
2007 Revised Distance from Earth6.52 Parallax (milliarcseconds)
 500.25 Light Years
 153.37 Parsecs
Galacto-Centric Distance23,761.00 Light Years / 7,285.00 Parsecs
Proper Motion Dec.16.47 ± 0.54 milliarcseconds/year
Proper Motion RA.-8.46 ± 0.77 milliarcseconds/year
B-V Index0.53
Radial Velocity37.80 ± 0.70 km/s
Spectral TypeF5Ib-II:
Colour(F) blue to white

Variable Star Details

Variable Star ClassPulsating
Variable Star TypeCepheids
Mean Variability Period in Days9.000
Variable Magnitude Range (Brighter - Dimmer)4.000 - 5.000

Estimated Facts

Calculated Effective Temperature6,040 Kelvin

Sources and Links

SIMBAD SourceLink

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