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HIP 66008

HIP 66008 is a red main sequence dwarf star that can be located in the constellation of Canes Venatici. The description is based on the spectral class. HIP 66008 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 66008's Alternative Names

HIP66008 is the reference name for the star in the Hipparcos Star Catalogue.

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+31 2500.

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

Location of HIP 66008

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 66008, the location is 13h 31m 58.34 and +31° 08` 04.4 .

Proper Motion of HIP 66008

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 15.90 ± 1.47 miliarcseconds/year towards the north and -131.97 ± 2.62 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 66008 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 0.16 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 66008

HIP 66008 has a spectral type of M0V.... This means the star is a red main sequence dwarf star. The star is 7,397.00 Parsecs from the Galactic Centre or terms of Light Years is 24,126.30 s. The star has a B-V Colour Index of 1.48 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 4,025 Kelvin.

HIP 66008 Radius has been calculated as being 0.49 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 340,234.08.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 0.50. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

HIP 66008 Apparent and Absolute Magnitudes

HIP 66008 has an apparent magnitude of 10.44 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 7.97 If you used the 2007 Parallax value, you would get an absolute magnitude of 7.91. 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 66008

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 32.05 which gave the calculated distance to HIP 66008 as 101.77 light years away from Earth or 31.20 parsecs. It would take a spaceship travelling at the speed of light, 101.77 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 31.24 which put HIP 66008 at a distance of 104.41 light years or 32.01 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 6,602,490.44 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 7,397.00 Parsecs or 24,126.30 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 66008 Facts

Visual Facts


Primary / Proper / Traditional NameHIP 66008
Alternative NamesHIP 66008, BD+31 2500
Spectral TypeM0V...
Constellation's Main StarNo
Multiple Star SystemYes
Star Type main sequence Dwarf Star
Colour red
GalaxyMilky Way
ConstellationCanes Venatici
Absolute Magnitude 7.97 / 7.91
Visual / Apparent Magnitude10.44
Naked Eye VisibleRequires a 4.5 - 6 Inch Telescope - Magnitudes
Right Ascension (R.A.)13h 31m 58.34
Declination (Dec.)+31° 08` 04.4
Galactic Latitude80.29 degrees
Galactic Longitude59.70 degrees
1997 Distance from Earth32.05 Parallax (milliarcseconds)
 101.77 Light Years
 31.20 Parsecs
2007 Distance from Earth31.24 Parallax (milliarcseconds)
 104.41 Light Years
 32.01 Parsecs
 6,602,490.44 Astronomical Units
Galacto-Centric Distance24,126.30 Light Years / 7,397.00 Parsecs
Proper Motion Dec.15.90 ± 1.47 milliarcseconds/year
Proper Motion RA.-131.97 ± 2.62 milliarcseconds/year
B-V Index1.48
Stellar Luminosity (Lsun)0.16

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Facts


Calculated Effective Temperature4,025 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
+31 2500.0A11.00000-144.0000039.00000M0Red
B11.200001960

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