Universe Guide
HomeAliensConstellationsTelevision and Films ListFact ListGames ListWarcraftSearchTwitterFacebook

HIP 66278, HD117930

HIP 66278 is a blue giant star that can be located in the constellation of Centaurus. 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 66278's Alternative Names

HIP66278 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD117930.

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

Location of HIP 66278

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 66278, the location is 13h 35m 02.60 and -58° 48` 11.0 .

Proper Motion of HIP 66278

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 0.85 ± 0.76 miliarcseconds/year towards the north and -13.11 ± 1.09 miliarcseconds/year east if we saw them in the horizon.

Physical Properties (Colour, Temperature) of HIP 66278

HIP 66278 has a spectral type of B9III. This means the star is a blue giant star. The star has a B-V Colour Index of 0.01 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 9,392 Kelvin.

HIP 66278 Radius has been calculated as being 5.64 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 3,925,379.74.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 4.56. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

HIP 66278 Apparent and Absolute Magnitudes

HIP 66278 has an apparent magnitude of 8.38 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 -1.02 If you used the 2007 Parallax value, you would get an absolute magnitude of -0.56. 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 66278

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 1.32 which gave the calculated distance to HIP 66278 as 2470.93 light years away from Earth or 757.58 parsecs. It would take a spaceship travelling at the speed of light, 2470.93 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 1.63 which put HIP 66278 at a distance of 2001.00 light years or 613.50 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.

Hide Explanations
Show GridLines

HIP 66278 Facts

Visual Facts


Primary / Proper / Traditional NameHIP 66278
Alternative NamesHD 117930, HIP 66278
Spectral TypeB9III
Multiple Star SystemNo / Unknown
Star TypeGiant Star
Colour blue
GalaxyMilky Way
ConstellationCentaurus
Absolute Magnitude-1.02 / -0.56
Visual / Apparent Magnitude8.38
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)13h 35m 02.60
Declination (Dec.)-58° 48` 11.0
Galactic Latitude3.59 degrees
Galactic Longitude308.56 degrees
1997 Distance from Earth1.32 Parallax (milliarcseconds)
 2470.93 Light Years
 757.58 Parsecs
2007 Distance from Earth1.63 Parallax (milliarcseconds)
 2001.00 Light Years
 613.50 Parsecs
Proper Motion Dec.0.85 ± 0.76 milliarcseconds/year
Proper Motion RA.-13.11 ± 1.09 milliarcseconds/year
B-V Index0.01

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Facts


Calculated Effective Temperature9,392 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


Add a Comment


Name:
Email: (Optional)
Comment: