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HIP 66125

HIP 66125 is a white to yellow star that can be located in the constellation of Chamaeleon. The description is based on the spectral class. HIP 66125 is not part of the constellation but is within the borders of the constellation.

The star can not be seen by the naked eye, you need a telescope to see it.

HIP 66125's Alternative Names

HIP66125 is the reference name for the star in the Hipparcos Star Catalogue.

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

Location of HIP 66125

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 HIP 66125, the location is 13h 33m 19.66 and -77° 34` 23.6 .

Proper Motion of HIP 66125

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 -139.24 ± 8.76 miliarcseconds/year towards the north and -379.28 ± 10.02 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.

HIP 66125 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 0.06 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 HIP 66125

HIP 66125 has a spectral type of G. This means the star is a white to yellow star. The star is 7,390.00 Parsecs from the Galactic Centre or terms of Light Years is 24,103.47 s. The star has a B-V Colour Index of 0.91 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 5,172 Kelvin.

HIP 66125 Radius has been calculated as being 0.31 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 213,792.93.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 0.29. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

HIP 66125 Apparent and Absolute Magnitudes

HIP 66125 has an apparent magnitude of 9.31 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 7.89 If you used the 2007 Parallax value, you would get an absolute magnitude of 8.04. 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 HIP 66125

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 52.09 which gave the calculated distance to HIP 66125 as 62.62 light years away from Earth or 19.20 parsecs. It would take a spaceship travelling at the speed of light, 62.62 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 55.78 which put HIP 66125 at a distance of 58.47 light years or 17.93 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.

Using the 2007 distance, the star is roughly 3,698,302.21 Astronomical Units from the Earth/Sun give or take a few. An Astronomical Unit is the distance between Earth and the Sun. The number of A.U. is the number of times that the star is from the Earth compared to the Sun.

The star's Galacto-Centric Distance is 7,390.00 Parsecs or 24,103.47 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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HIP 66125 Facts

Visual Facts


Primary / Proper / Traditional NameHIP 66125
Alternative NamesHIP 66125
Spectral TypeG
Constellation's Main StarNo
Multiple Star SystemYes
Star TypeStar
Colour white to yellow
GalaxyMilky Way
ConstellationChamaeleon
Absolute Magnitude 7.89 / 8.04
Visual / Apparent Magnitude9.31
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)13h 33m 19.66
Declination (Dec.)-77° 34` 23.6
Galactic Latitude-14.89 degrees
Galactic Longitude305.25 degrees
1997 Distance from Earth52.09 Parallax (milliarcseconds)
 62.62 Light Years
 19.20 Parsecs
2007 Distance from Earth55.78 Parallax (milliarcseconds)
 58.47 Light Years
 17.93 Parsecs
 3,698,302.21 Astronomical Units
Galacto-Centric Distance24,103.47 Light Years / 7,390.00 Parsecs
Proper Motion Dec.-139.24 ± 8.76 milliarcseconds/year
Proper Motion RA.-379.28 ± 10.02 milliarcseconds/year
B-V Index0.91
Stellar Luminosity (Lsun)0.06

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Facts


Calculated Effective Temperature5,172 Kelvin

Sources and Links


SIMBAD SourceLink

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