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58 Ceti B, 58 Ceti, HD12021, HIP9155

58 Ceti B is a blue star that can be located in the constellation of Cetus. The star can not be seen by the naked eye, you need a telescope to see it.

HIP9155 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD12021.

Location of 58 Ceti B

The location of the star in the galaxy 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 58 Ceti B, the location is 01h 57m 56.14 and -02d 05` 57.7 .

Proper Motion of 58 Ceti B

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 1.07 ± 0.63 miliarcseconds/year towards the north and -1.87 ± 1.01 miliarcseconds/year east if we saw them in the horizon.

Physical Properties (Colour, Temperature, Radius) of 58 Ceti B

58 Ceti B has a spectral type of A0. This means the star is a blue star. The star has a B-V Colour Index of -0.08 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 12,939 Kelvin.

58 Ceti B Radius has been calculated as being 1.45 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 1,008,279.88.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 0.97. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

58 Ceti B Apparent and Absolute Magnitudes

58 Ceti B has an apparent magnitude of 8.89 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 0.54 If you used the 2007 Parallax value, you would get an absolute magnitude of 1.41. 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 58 Ceti B

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 2.14 which gave the calculated distance to 58 Ceti B as 1524.13 light years away from Earth or 467.29 parsecs. It would take a spaceship travelling at the speed of light, 1524.13 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 3.19 which put 58 Ceti B at a distance of 1022.46 light years or 313.48 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.

58 Ceti B Facts

Alternative Names

Traditional/Proper Name58 Ceti B
Flamsteed Name58 Ceti
Flamsteed Short Name58 Cet
Hipparcos Library I.D.9155
Bonner DurchmusterungBD-02 329
Henry Draper Designation12021

Visual Facts

Star Type star
Absolute Magnitude0.54 / 1.41
Visual / Apparent Magnitude8.89
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)01h 57m 56.14
Declination (Dec.)-02d 05` 57.7
Galactic Latitude-60.33 degrees
Galactic Longitude158.22 degrees
1997 Distance from Earth2.14 Parallax (milliarcseconds)
 1524.13 Light Years
 467.29 Parsecs
2007 Revised Distance from Earth3.19 Parallax (milliarcseconds)
 1022.46 Light Years
 313.48 Parsecs
Proper Motion Dec.1.07 ± 0.63 milliarcseconds/year
Proper Motion RA.-1.87 ± 1.01 milliarcseconds/year
B-V Index-0.08
Spectral TypeA0
Associated / Clustered Stars58 Ceti
Colour(A) blue

Estimated Facts

Calculated Effective Temperature12,939 Kelvin

Sources and Links

SIMBAD SourceLink

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