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Omega Pavonis, HD175329, HIP93163, HR7127

Omega Pavonis is a orange to red 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.

Omega Pavonis is the Bayer Classification for the star. The Id of the star in the Yale Bright Star Catalogue is HR7127. HIP93163 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD175329.

Location of Omega 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 Omega Pavonis, the location is 18h 58m 36.59 and -60d 12` 02.3 .

Proper Motion of Omega 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 33.11 ± 0.19 miliarcseconds/year towards the north and -124.85 ± 0.33 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 180.00000 km/s with an error of about 0.80 km/s .

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

Omega Pavonis has a spectral type of K1III-IV. This means the star is a orange to red star. The star is 7257.00000000 Parsecs from the Galactic Centre or terms of Light Years is 23669.6738740800000000s. The star has a B-V Colour Index of 1.35 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 4,241 Kelvin.

Omega Pavonis Radius has been calculated as being 25.70 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 17,883,796.87.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 28.05. 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 -0.49 with an error value of 0.10 Fe/H with the Sun has a value of 1 to put it into context.

Omega Pavonis Apparent and Absolute Magnitudes

Omega Pavonis has an apparent magnitude of 5.14 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 -0.86 If you used the 2007 Parallax value, you would get an absolute magnitude of -1.05. 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 Omega Pavonis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 6.32 which gave the calculated distance to Omega Pavonis as 516.08 light years away from Earth or 158.23 parsecs. It would take a spaceship travelling at the speed of light, 516.08 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 5.79 which put Omega Pavonis at a distance of 563.32 light years or 172.71 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 7,257.00 Parsecs or 23,669.67 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*. Omega Pavonis brightness ranges from a magnitude of 5.299 to a magnitude of 5.265 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.0 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.

Omega Pavonis Facts

Alternative Names

Bayer DesignationOmega Pavonis
Hipparcos Library I.D.93163
Yale Bright Star Catalogue (HR) Id7127
Henry Draper Designation175329

Visual Facts

Star Type star
Absolute Magnitude-0.86 / -1.05
Visual / Apparent Magnitude5.14
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)18h 58m 36.59
Declination (Dec.)-60d 12` 02.3
Galactic Latitude-24.18 degrees
Galactic Longitude335.92 degrees
1997 Distance from Earth6.32 Parallax (milliarcseconds)
 516.08 Light Years
 158.23 Parsecs
2007 Revised Distance from Earth5.79 Parallax (milliarcseconds)
 563.32 Light Years
 172.71 Parsecs
Galacto-Centric Distance23,669.67 Light Years / 7,257.00 Parsecs
Proper Motion Dec.33.11 ± 0.19 milliarcseconds/year
Proper Motion RA.-124.85 ± 0.33 milliarcseconds/year
B-V Index1.35
Radial Velocity180.00 ± 0.80 km/s
Iron Abundance-0.49 ± 0.10 Fe/H
Spectral TypeK1III-IV
Colour(K) Orange to Red

Variable Star Details

Mean Variability Period in Days0.024
Variable Magnitude Range (Brighter - Dimmer)5.265 - 5.299

Estimated Facts

Calculated Effective Temperature4,241 Kelvin

Sources and Links

SIMBAD SourceLink

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