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HIP 64685

HIP 64685 is a orange to red star that can be located in the constellation of Hydra. The description is based on the spectral class. The star can not be seen by the naked eye, you need a telescope to see it.

HIP 64685's Alternative Names

HIP64685 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 64685

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 64685, the location is 13h 15m 27.74 and -25° 19` 30.7 .

Proper Motion of HIP 64685

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 -93.96 ± 0.74 miliarcseconds/year towards the north and -154.19 ± 1.48 miliarcseconds/year east if we saw them in the horizon.

HIP 64685 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 0.59 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 64685

HIP 64685 has a spectral type of K0. This means the star is a orange to red star. The star is 7,364.00 Parsecs from the Galactic Centre or terms of Light Years is 24,018.67 s. The star has a B-V Colour Index of 0.76 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 5,513 Kelvin.

HIP 64685 Radius has been calculated as being 0.80 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 557,901.53.km. If you need the diameter of the star, you just need to multiple the radius by 2. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

HIP 64685 Apparent and Absolute Magnitudes

HIP 64685 has an apparent magnitude of 9.81 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. Using the supplied Parallax value, you would get an absolute magnitude of 5.53 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 64685

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 13.95 which gave the calculated distance to HIP 64685 as 233.81 light years away from Earth or 71.68 parsecs. It would take a spaceship travelling at the speed of light, 233.81 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

The star's Galacto-Centric Distance is 7,364.00 Parsecs or 24,018.67 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 64685 Facts

Visual Facts


 HIP 64685
Alternative NamesHIP 64685
Spectral TypeK0
Multiple Star SystemNo / Unknown
Star TypeStar
Colour orange to red
GalaxyMilky Way
ConstellationHydra
Absolute Magnitude5.53
Visual / Apparent Magnitude9.81
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)13h 15m 27.74
Declination (Dec.)-25° 19` 30.7
Galactic Latitude37.23 degrees
Galactic Longitude309.75 degrees
Distance from Earth13.95 Parallax (milliarcseconds)
 233.81 Light Years
 71.68 Parsecs
Galacto-Centric Distance24,018.67 Light Years / 7,364.00 Parsecs
Proper Motion Dec.-93.96 ± 0.74 milliarcseconds/year
Proper Motion RA.-154.19 ± 1.48 milliarcseconds/year
B-V Index0.76
Stellar Luminosity (Lsun)0.59

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Facts


Calculated Effective Temperature5,513 Kelvin

Sources and Links


SIMBAD SourceLink

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