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105 Piscium - HD10164 - HIP7740

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

HIP7740 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD10164.

105 Piscium has alternative name(s), 105 Piscium , 105 Psc.

Location of 105 Piscium

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 105 Piscium, the location is 01h 39m 40.77 and +16d24`21.2 .

Proper Motion of 105 Piscium

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 -11.43 ± 0.31 miliarcseconds/year towards the north and 81.40 ± 0.49 miliarcseconds/year east if we saw them in the horizon.

105 Piscium 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 70.0000000 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 105 Piscium

105 Piscium has a spectral type of K2III. This means the star is a orange to red giant star. The star is 7465.00000000 Parsecs from the Galactic Centre or terms of Light Years is 24348.0936296000000000s. The star has a B-V Colour Index of 1.11 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 4,646 Kelvin.

105 Piscium Radius has been calculated as being 12.79 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 8,896,657.40.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 11.03. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

105 Piscium Apparent and Absolute Magnitudes

105 Piscium has an apparent magnitude of 5.98 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 0.26 If you used the 2007 Parallax value, you would get an absolute magnitude of 0.58. 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 105 Piscium

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 7.18 which gave the calculated distance to 105 Piscium as 454.27 light years away from Earth or 139.28 parsecs. It would take a spaceship travelling at the speed of light, 454.27 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 8.32 which put 105 Piscium at a distance of 392.02 light years or 120.19 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 7,465.00 Parsecs or 24,348.09 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.

105 Piscium Facts

Alternative Names

Traditional/Proper Name105 Piscium
Short Name105 Psc
Alternative Name(s)105 Piscium
Hipparcos Library I.D.7740
Bonner DurchmusterungBDD+15 245
Henry Draper Designation10164

Visual Facts

Star Typegiant star
Absolute Magnitude0.26 / 0.58
Visual / Apparent Magnitude5.98
Naked Eye VisibleYes - Ref: Wiki
Right Ascension (R.A.)01h 39m 40.77
Declination (Dec.)+16d24`21.2
Galactic Latitude-44.92 degrees
Galactic Longitude139.38 degrees
1997 Distance from Earth7.18 Parallax (milliarcseconds)
 454.27 Light Years
 139.28 Parsecs
2007 Revised Distance from Earth8.32 Parallax (milliarcseconds)
 392.02 Light Years
 120.19 Parsecs
Galacto-Centric Distance24,348.09 Light Years / 7,465.00 Parsecs
Proper Motion Dec.-11.43 ± 0.31 milliarcseconds/year
Proper Motion RA.81.40 ± 0.49 milliarcseconds/year
B-V Index1.11
Radial Velocity15.26 ± 0.20 km/s
Spectral TypeK2III
Colour(K) Orange to Red

Estimated Facts

Luminosity (x the Sun)70.0000000
Calculated Effective Temperature4,646 Kelvin

Sources and Links

SIMBAD SourceLink

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