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HIP 66077

HIP 66077 is a red main sequence dwarf star that can be located in the constellation of Coma Berenices. 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 66077's Alternative Names

HIP66077 is the reference name for the star in the Hipparcos Star Catalogue. The Gliese ID of the star is GL 516A. The star was part of the original catalogue devised by German Astronomer Wilheim Gliese of stars located within 20 parsecs of Earth. Star Names

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

Location of HIP 66077

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 66077, the location is 13h 32m 44.44 and +16° 48` 41.0 .

Proper Motion of HIP 66077

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 -224.45 ± 12.24 miliarcseconds/year towards the north and 282.58 ± 19.88 miliarcseconds/year east if we saw them in the horizon. The Radial Velocity, that is the speed at which the star is moving away/towards us is 0.00000 km/s with an error of about 3.70 km/s .

Physical Properties (Colour, Temperature) of HIP 66077

HIP 66077 has a spectral type of M4Ve. This means the star is a red main sequence dwarf star. The star has a B-V Colour Index of 1.54 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 3,913 Kelvin.

HIP 66077 Radius has been calculated as being 0.15 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 102,863.95.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 0.14. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

HIP 66077 Apparent and Absolute Magnitudes

HIP 66077 has an apparent magnitude of 11.38 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 10.69 If you used the 2007 Parallax value, you would get an absolute magnitude of 10.85. 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 66077

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 72.66 which gave the calculated distance to HIP 66077 as 44.89 light years away from Earth or 13.76 parsecs. It would take a spaceship travelling at the speed of light, 44.89 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 78.37 which put HIP 66077 at a distance of 41.62 light years or 12.76 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.

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 66077 Facts

Visual Facts


Primary / Proper / Traditional NameHIP 66077
Alternative NamesHIP 66077, Gliese 516A
Spectral TypeM4Ve
Multiple Star SystemYes
Star Type main sequence Dwarf Star
Colour red
GalaxyMilky Way
ConstellationComa Berenices
Absolute Magnitude10.69 / 10.85
Visual / Apparent Magnitude11.38
Naked Eye VisibleRequires a 4.5 - 6 Inch Telescope - Magnitudes
Right Ascension (R.A.)13h 32m 44.44
Declination (Dec.)+16° 48` 41.0
Galactic Latitude75.94 degrees
Galactic Longitude347.86 degrees
1997 Distance from Earth72.66 Parallax (milliarcseconds)
 44.89 Light Years
 13.76 Parsecs
2007 Distance from Earth78.37 Parallax (milliarcseconds)
 41.62 Light Years
 12.76 Parsecs
Proper Motion Dec.-224.45 ± 12.24 milliarcseconds/year
Proper Motion RA.282.58 ± 19.88 milliarcseconds/year
B-V Index1.54
Radial Velocity0.00 ± 3.70 km/s

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Facts


Calculated Effective Temperature3,913 Kelvin

Sources and Links


SIMBAD SourceLink

Multi-Star System

The star has been identified as being a multi-star system, one in which there is at least one star in close orbit to another star or two or more stars orbiting a central point. The stars may be of equal mass, unequal mass where one star is stronger than the other or be in groups orbiting a central point which doesn't necessarily have to be a star. More information can be found on my dedicated multiple star systems page. The source of the info is Simbad. The file is dated 2000 so any differences between this and any other source will be down to the actual source from where the information came from.


Proper Motion mas/yr
H.D. IdB.D. IdStar CodeMagnitudeR.A.Dec.SpectrumColourYear
A11.00000M4Red
B11.500001944

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