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109 Piscium - HD10697 - HIP8159

109 Piscium is a white to yellow subgiant 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. The star has an estimated age of 7.50 Billion of Years but could be as young as 6.90 to 7.90 according to Hipparcos.

HIP8159 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD10697. The Gliese ID of the star is Gliese GL72. 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.

109 Piscium has alternative name(s), 109 Piscium , 109 Psc. 109 Piscium has at least 1 Extrasolar Planets believed to be in orbit around the star.

Location of 109 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 109 Piscium, the location is 01h 44m 55.85 and +20d05`00.3 .

Proper Motion of 109 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 -105.35 ± 0.28 miliarcseconds/year towards the north and -44.75 ± 0.43 miliarcseconds/year east if we saw them in the horizon.

Physical Properties (Colour, Temperature, Metallicity, Age, Mass, Radius) of 109 Piscium

109 Piscium has a spectral type of G5IV. This means the star is a white to yellow subgiant star. The star is 7419.00000000 Parsecs from the Galactic Centre or terms of Light Years is 24198.0584913600000000s. The star has a B-V Colour Index of 0.72 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 5,503 Kelvin.

109 Piscium Radius has been calculated as being 1.86 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 1,294,650.02.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 1.86. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures. The star's solar mass is 1.00 times that of the Sun's. The Sun's Mass is 1,989,100,000,000,000,000,000 billion kg. which to calculate using this website is too large. To give idea of size, the Sun is 99.86% the mass of the solar system.

The star's metallicity is 0.100000, this value is the fractional amount of the star that is not Hydrogen (X) or Helium (Y). An older star would have a high metallicity whereas a new star would have a lower one.

The stars age according to Hipparcos data files put the star at an age of about 7.50 Billion years old but could be between 6.90 and 7.90 Billion years old. In comparison, the Sun's age is about 4.6 Billion Years Old.

109 Piscium Apparent and Absolute Magnitudes

109 Piscium has an apparent magnitude of 6.27 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 3.71 If you used the 2007 Parallax value, you would get an absolute magnitude of 3.71. 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 109 Piscium

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 30.71 which gave the calculated distance to 109 Piscium as 106.21 light years away from Earth or 32.56 parsecs. It would take a spaceship travelling at the speed of light, 106.21 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 30.70 which put 109 Piscium at a distance of 106.24 light years or 32.57 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 7,419.00 Parsecs or 24,198.06 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.

109 Piscium Facts

Alternative Names

Traditional/Proper Name109 Piscium
Short Name109 Psc
Alternative Name(s)109 Piscium
Hipparcos Library I.D.8159
Bonner DurchmusterungBDD+19 282
Gliese ID72
Henry Draper Designation10697

Visual Facts

Star Typesubgiant star
Age7.50 Billion Years Old
Age Range6.90 - 7.90 Billion Years Old
Metalicity0.1000
Absolute Magnitude3.71 / 3.71
Visual / Apparent Magnitude6.27
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)01h 44m 55.85
Declination (Dec.)+20d05`00.3
Galactic Latitude-41.04 degrees
Galactic Longitude139.67 degrees
1997 Distance from Earth30.71 Parallax (milliarcseconds)
 106.21 Light Years
 32.56 Parsecs
2007 Revised Distance from Earth30.70 Parallax (milliarcseconds)
 106.24 Light Years
 32.57 Parsecs
Galacto-Centric Distance24,198.06 Light Years / 7,419.00 Parsecs
Proper Motion Dec.-105.35 ± 0.28 milliarcseconds/year
Proper Motion RA.-44.75 ± 0.43 milliarcseconds/year
B-V Index0.72
Radial Velocity-45.96 ± 0.09 km/s
Iron Abundance0.12 ± 0.01 Fe/H
Spectral TypeG5IV
Colour(G) White to Yellow

Companions (Multi-Star and Exoplanets) Facts

Exoplanet Count1

Estimated Facts

Calculated Effective Temperature5,503 Kelvin
Mass Compared to the Sun1.00
Metallicity0.10000

Sources and Links

SIMBAD SourceLink

Related Stars


List of Extrasolar Planets orbiting 109 Piscium


NameStatusMass (Jupiters)Orbital Period (Days)EccentricityDiscoveredSemi-Major AxisPeriastronInclination
Hd 10697 BConfirmed6.831076.4000.120002.16109.00069.000

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