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HIP 66072

HIP 66072 is a variable star that can be located in the constellation of Coma Berenices. The description is based on the spectral class. HIP 66072 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 66072's Alternative Names

HIP66072 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+23 2581.

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

Location of HIP 66072

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 66072, the location is 13h 32m 41.78 and +22° 30` 07.3 .

Proper Motion of HIP 66072

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 -71.24 ± 0.91 miliarcseconds/year towards the north and -132.96 ± 1.64 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 66072 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 0.37 that I have given is based on the value in the Simbad Hipparcos Extended Catalogue at the University of Strasbourg from 2012.

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 66072 Facts

Visual Facts


Primary / Proper / Traditional NameHIP 66072
Alternative NamesHIP 66072, BD+23 2581
Constellation's Main StarNo
Multiple Star SystemYes
Star TypeVariable Star
GalaxyMilky Way
ConstellationComa Berenices
Absolute Magnitude 6.31 / 6.32
Visual / Apparent Magnitude9.64
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)13h 32m 41.78
Declination (Dec.)+22° 30` 07.3
Galactic Latitude79.56 degrees
Galactic Longitude8.87 degrees
1997 Distance from Earth21.55 Parallax (milliarcseconds)
 151.35 Light Years
 46.40 Parsecs
2007 Distance from Earth21.71 Parallax (milliarcseconds)
 150.24 Light Years
 46.06 Parsecs
Galacto-Centric Distance24,109.99 Light Years / 7,392.00 Parsecs
Proper Motion Dec.-71.24 ± 0.91 milliarcseconds/year
Proper Motion RA.-132.96 ± 1.64 milliarcseconds/year
B-V Index1.03
Stellar Luminosity (Lsun)0.37

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Mean Variability Period in Days0.087
Variable Magnitude Range (Brighter - Dimmer)9.728 - 9.858

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
+23 2581.0A10.30000-133.00000-72.00000
B10.80000-133.00000-72.000001991

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