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112 G. Piscium, HD7107, HIP5575

112 G. Piscium is a white to yellow star that can be located in the constellation of Pisces. The description is based on the spectral class. 112 G. Piscium is not part of the constellation but is within the borders of the constellation.

The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.

112 G. Piscium's Alternative Names

HIP5575 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD7107.

The Gould star designation is one that was designed by American astronomer, Benjamin Apthorp Gould. Gould stars are predominantly in the Southern and Equatorial constellations but do appear in northern constellations such as Bootes and Orion. The star has the designation 112 G. Piscium. There are no stars with a Gould designation in Ursa Major for example.

BD number is the number that the star was filed under in the Durchmusterung or Bonner Durchmusterung, a star catalogue that was put together by the Bonn Observatory between 1859 to 1903. The star's BD Number is BD+09 138.

More details on star alternative names can be found at Star Names .

Location of 112 G. Piscium

The location of the star in the night sky 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 112 G. Piscium, the location is 01h 11m 28.97 and +10° 17` 30.9 .

Proper Motion of 112 G. 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 -7.27 ± 0.40 miliarcseconds/year towards the north and 12.41 ± 0.56 miliarcseconds/year east if we saw them in the horizon. . When the value is negative then the star and the Sun are getting closer to one another, likewise, a positive number means that two stars are moving away. Its nothing to fear as the stars are so far apart, they won't collide in our life-time, if ever.

112 G. 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 48.44 that I have given is based on the value in the Simbad Hipparcos Extended Catalogue at the University of Strasbourg from 2012.

Physical Properties (Colour, Temperature) of 112 G. Piscium

112 G. Piscium has a spectral type of G5. This means the star is a white to yellow star. The star is 7,454.00 Parsecs from the Galactic Centre or terms of Light Years is 24,312.22 s. The star has a B-V Colour Index of 0.8 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 5,422 Kelvin.

112 G. Piscium Radius has been calculated as being 6.74 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 4,688,772.73.km. If you need the diameter of the star, you just need to multiple the radius by 2. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 7.06. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

112 G. Piscium Apparent and Absolute Magnitudes

112 G. Piscium has an apparent magnitude of 6.49 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 0.98 If you used the 2007 Parallax value, you would get an absolute magnitude of 0.88. 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 112 G. Piscium

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 7.92 which gave the calculated distance to 112 G. Piscium as 411.82 light years away from Earth or 126.26 parsecs. It would take a spaceship travelling at the speed of light, 411.82 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 7.55 which put 112 G. Piscium at a distance of 432.00 light years or 132.45 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 7,454.00 Parsecs or 24,312.22 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.

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112 G. Piscium Facts

Visual Facts


Primary / Proper / Traditional Name112 G. Piscium
Alternative NamesHD 7107, HIP 5575, BD+09 138
Spectral TypeG5
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeStar
Colour white to yellow
GalaxyMilky Way
ConstellationPisces
Absolute Magnitude 0.98 / 0.88
Visual / Apparent Magnitude6.49
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)01h 11m 28.97
Declination (Dec.)+10° 17` 30.9
Galactic Latitude-52.27 degrees
Galactic Longitude131.00 degrees
1997 Distance from Earth7.92 Parallax (milliarcseconds)
 411.82 Light Years
 126.26 Parsecs
2007 Distance from Earth7.55 Parallax (milliarcseconds)
 432.00 Light Years
 132.45 Parsecs
Galacto-Centric Distance24,312.22 Light Years / 7,454.00 Parsecs
Proper Motion Dec.-7.27 ± 0.40 milliarcseconds/year
Proper Motion RA.12.41 ± 0.56 milliarcseconds/year
B-V Index0.80
Stellar Luminosity (Lsun)48.44

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Facts


Calculated Effective Temperature5,422 Kelvin

Sources and Links


SIMBAD SourceLink

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