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Mu Fornacis

Mu Fornacis Facts

  • Mu Fornacis is a main sequence star that can be located in the constellation of Fornax. The description is based on the spectral class.
  • Mu Fornacis is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (A0V) of the star, the star's colour is blue - white .
  • The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.
  • Using the most recent figures given by the 2007 Hipparcos data, the star is 320.40 light years away from us. Distance

Mu Fornacis's Alternative Names

Mu Fornacis (Mu. For) is the Bayer Classification for the star. The Bayer Classification was created by Johann Bayer in 1603. The brightest star in the constellation is normally given the Alpha designation, there are exceptions such as Pollux which is Beta Geminorum.

The Id of the star in the Yale Bright Star Catalogue is HR652. HIP10320 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD13709. The Gliese ID of the star is GL 89. The star was part of the original catalogue devised by German Astronomer Wilheim Gliese of stars located within 20 parsecs of Earth. Star Names

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

Location of Mu Fornacis

The location of the main sequence 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 Mu Fornacis, the location is 02h 12m 54.46 and -30° 43` 25.8 .

Radial Velocity and Proper Motion of Mu Fornacis

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 6.85 ± 0.18 milliarcseconds/year towards the north and 14.10 ± 0.24 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 10.00000 km/s with an error of about 3.70 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 of Mu Fornacis

Mu Fornacis Colour and Temperature

Based on the star's spectral type of A0V , Mu Fornacis's colour and type is blue - white main sequence star. The star has a B-V Colour Index of -0.01 which means the star's temperature is about 9,679 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu.

Mu Fornacis 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 78.40 that I have given is based on the value in the Simbad Hipparcos Extended Catalogue at the University of Strasbourg from 2012.

Mu Fornacis Radius

Mu Fornacis estimated radius has been calculated as being 2.99 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 2,078,378.27.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 2.8789848708667011920825294963. The figure is derived at by using the formula from SDSS rather than peer reviewed papers. It has been known to produce widely incorrect figures.

Mu Fornacis Apparent and Absolute Magnitudes

Mu Fornacis has an apparent magnitude of 5.27 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 0.23 If you used the 2007 Parallax value, you would get an absolute magnitude of 0.31. 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 Mu Fornacis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 9.82000 which gave the calculated distance to Mu Fornacis as 332.14 light years away from Earth or 101.83 parsecs. If you want that in miles, it is about 1,952,526,631,449,204.23, based on 1 Ly = 5,878,625,373,183.61 miles.

In 2007, Hipparcos data was revised with a new parallax of 10.18000 which put Mu Fornacis at a distance of 320.40 light years or 98.23 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 20,261,250.74 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 7,421.00 Parsecs or 24,204.58 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 Mu Fornacis

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)
Walking453,716,391,982.90
Car1201,790,546,399.43
Airbus A380736291,936,912.95
Speed of Sound (Mach 1)767.269280,039,422.85
Concorde (Mach 2)1,534.54140,019,528.93
New Horizons Probe33,0006,511,077.82
Speed of Light670,616,629.00320.40

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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Additional Mu Fornacis Facts and Figures

Visual Facts


Primary / Proper / Traditional NameMu Fornacis
Alternative NamesMu. For, HD 13709, HIP 10320, HR 652, Gliese 89
Spectral TypeA0V
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star Type Main Sequence Dwarf Star
ColourBlue
GalaxyMilky Way
ConstellationFornax
Absolute Magnitude 0.23 / 0.31
Visual / Apparent Magnitude5.27
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)02h 12m 54.46
Declination (Dec.)-30° 43` 25.8
Galactic Latitude-71.84175004 degrees
Galactic Longitude229.18456729 degrees
1997 Distance from Earth9.82000 Parallax (milliarcseconds)
 332.14 Light Years
 101.83 Parsecs
2007 Distance from Earth10.18000 Parallax (milliarcseconds)
 320.40 Light Years
 98.23 Parsecs
 20,261,250.74 Astronomical Units
Galacto-Centric Distance24,204.58 Light Years / 7,421.00 Parsecs
Proper Motion Dec. 6.85000 ± 0.18000 milliarcseconds/year
Proper Motion RA.14.10000 ± 0.24000 milliarcseconds/year
B-V Index-0.01
Radial Velocity10.00000 ± 3.70 km/s
Eccentricity0.10740
Semi-Major Axis8236.0000000
Stellar Luminosity (Lsun)78.4000000

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Calculated Facts


Radius (x the Sun)2.88
Effective Temperature9,679 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


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