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HIP 6457, HD8449

HIP 6457 is a red giant star that can be located in the constellation of Sculptor. 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 6457's Alternative Names

HIP6457 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD8449.

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

Location of HIP 6457

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 6457, the location is 01h 23m 02.47 and -37° 42` 08.5 .

Proper Motion of HIP 6457

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 -9.47 ± 0.38 miliarcseconds/year towards the north and 2.57 ± 0.66 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.

Physical Properties (Colour, Temperature) of HIP 6457

HIP 6457 has a spectral type of M1III. This means the star is a red giant star. The star has a B-V Colour Index of 1.64 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 3,671 Kelvin.

HIP 6457 Radius has been calculated as being 32.01 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 22,275,426.68.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 32.16. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

HIP 6457 Apparent and Absolute Magnitudes

HIP 6457 has an apparent magnitude of 7.33 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 -0.71 If you used the 2007 Parallax value, you would get an absolute magnitude of -0.72. 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 6457

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 2.47 which gave the calculated distance to HIP 6457 as 1320.50 light years away from Earth or 404.86 parsecs. It would take a spaceship travelling at the speed of light, 1320.50 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 2.46 which put HIP 6457 at a distance of 1325.87 light years or 406.50 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. HIP 6457 brightness ranges from a magnitude of 7.447 to a magnitude of 7.379 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.0 days (variability).

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 6457 Facts

Visual Facts


Primary / Proper / Traditional NameHIP 6457
Alternative NamesHD 8449, HIP 6457
Spectral TypeM1III
Multiple Star SystemNo / Unknown
Star TypeGiant Star
Colour red
GalaxyMilky Way
ConstellationSculptor
Absolute Magnitude-0.71 / -0.72
Visual / Apparent Magnitude7.33
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)01h 23m 02.47
Declination (Dec.)-37° 42` 08.5
Galactic Latitude-77.51 degrees
Galactic Longitude272.74 degrees
1997 Distance from Earth2.47 Parallax (milliarcseconds)
 1320.50 Light Years
 404.86 Parsecs
2007 Distance from Earth2.46 Parallax (milliarcseconds)
 1325.87 Light Years
 406.50 Parsecs
Proper Motion Dec.-9.47 ± 0.38 milliarcseconds/year
Proper Motion RA.2.57 ± 0.66 milliarcseconds/year
B-V Index1.64

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Mean Variability Period in Days0.044
Variable Magnitude Range (Brighter - Dimmer)7.379 - 7.447

Estimated Facts


Calculated Effective Temperature3,671 Kelvin

Sources and Links


SIMBAD SourceLink

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