Universe Guide

F Centauri

F Centauri Facts

F Centauri's Alternative Names

The Id of the star in the Yale Bright Star Catalogue is HR4682. HIP60059 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD107079.

F Centauri has alternative name(s) :- , NSV 05544.

The Gould star designation is one that was designed by American astronomer, Benjamin Apthorp Gould. Gould stars are predominantly in the Southern and Equatorial constellations but do appear in northern constellations such as Bootes and Orion. The star has the designation 108 G. Centauri. There are no stars with a Gould designation in Ursa Major for example.

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

Location of F Centauri

The location of the giant 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 object is compared to the celestial equator and is expressed in degrees. For F Centauri, the location is 12h 18m 59.83 and -55° 08` 34.7 .

Radial Velocity and Proper Motion of F Centauri

Proper Motion

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 -11.05 ± 0.36 milliarcseconds/year towards the north and -68.69 ± 0.62 milliarcseconds/year east if we saw them in the horizon.

Radial Velocity

The Radial Velocity, that is the speed at which the star is moving away/towards the Sun is -7.10 km/s with an error of about 2.80 km/s . 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 F Centauri

F Centauri Colour and Temperature

F Centauri has a spectral type of M1III. This means the star is a red giant star. The star has a B-V Colour Index of 1.6 which means the star's temperature is about 3,779 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu at being .

F Centauri Radius

Radius has been calculated as being 25.36 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 17,645,634.78.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 32.82. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

F Centauri Apparent and Absolute Magnitudes

F Centauri has an apparent magnitude of 5.01 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 -0.33 If you used the 2007 Parallax value, you would get an absolute magnitude of -0.89. 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 F Centauri

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 8.55 which gave the calculated distance to F Centauri as 381.48 light years away from Earth or 116.96 parsecs. If you want that in miles, it is 255,826,831,631.

In 2007, Hipparcos data was revised with a new parallax of 6.60 which put F Centauri at a distance of 494.19 light years or 151.52 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 31,253,025.67 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 7,331.00 Parsecs or 23,911.03 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.

Travel Time to F Centauri

The time it will take to travel to this star is dependent on how fast you are going. U.G. has done some calculations as to how long it will take going at differing speeds. A note about the calculations, when I'm talking about years, I'm talking non-leap years only (365 days).

The New Horizons space probe is the fastest probe that we've sent into space at the time of writing. Its primary mission was to visit Pluto which at the time of launch (2006), Pluto was still a planet.

DescriptionSpeed (m.p.h.)Time (years)
Airbus A380736450,288,086.80
Speed of Sound (Mach 1)767.269431,937,210.92
Concorde (Mach 2)1,534.54215,968,323.98
New Horizons Probe33,00010,042,788.85
Speed of Light670,616,629.00494.19
F Centauri brightness ranges from a magnitude of 5.126 to a magnitude of 5.089 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.

Hide Explanations
Show GridLines

Additional F Centauri Facts and Figures

Visual Facts

Primary / Proper / Traditional NameF Centauri
Alternative NamesHD 107079, HIP 60059, HR 4682, 108 G. Centauri, NSV 05544
Spectral TypeM1III
Constellation's Main StarNo
Multiple Star SystemYes
Star TypeGiant Star
GalaxyMilky Way
Absolute Magnitude -0.33 / -0.89
Visual / Apparent Magnitude5.01
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)12h 18m 59.83
Declination (Dec.)-55° 08` 34.7
Galactic Latitude7.43 degrees
Galactic Longitude298.27 degrees
1997 Distance from Earth8.55 Parallax (milliarcseconds)
 381.48 Light Years
 116.96 Parsecs
2007 Distance from Earth6.60 Parallax (milliarcseconds)
 494.19 Light Years
 151.52 Parsecs
 31,253,025.67 Astronomical Units
Galacto-Centric Distance23,911.03 Light Years / 7,331.00 Parsecs
Proper Motion Dec.-11.05 ± 0.36 milliarcseconds/year
Proper Motion RA.-68.69 ± 0.62 milliarcseconds/year
B-V Index1.60
Radial Velocity-7.10 ± 2.80 km/s
Semi-Major Axis7053.00

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Variable Star Details

Mean Variability Period in Days0.024
Variable Magnitude Range (Brighter - Dimmer)5.089 - 5.126

Estimated Calculated Facts

Radius (x the Sun)32.82
Effective Temperature3,779 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
107079-54 5113.4A5.00000-77.00000-17.00000M1Red

Related Stars

Comments and Questions

There's no register feature and no need to give an email address if you don't need to. All messages will be reviewed before being displayed. Comments may be merged or altered slightly such as if an email address is given in the main body of the comment.

You can decline to give a name which if that is the case, the comment will be attributed to a random star. A name is preferred even if its a random made up one by yourself.

This website is using cookies. More info. That's Fine