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Dalim, Alpha Fornacis, HD20010, HIP14879, HR963

Dalim (Alpha Fornacis) is a blue to white main sequence dwarf star that can be located in the constellation of Fornax. Dalim is the 1st brightest star in Fornax based on the Hipparcos 2007 apparent magnitude. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it. The star has an estimated age of 3.00 Billion of Years but could be as young as 2.80 to 4.10 according to Hipparcos.

Dalim's Alternative Names

Alpha Fornacis is the Bayer Classification for the star. The Id of the star in the Yale Bright Star Catalogue is HR963. HIP14879 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD20010. The Gliese ID of the star is GL 127A. The star was part of the original catalogue devised by German Astronomer Wilheim Gliese of stars located within 20 parsecs of Earth. Ref : Star Names.

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

Location of Dalim

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 Dalim, the location is 03h 12m 04.28 and -28° 59` 20.8 .

Proper Motion of Dalim

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 611.33 ± 0.29 miliarcseconds/year towards the north and 370.87 ± 0.45 miliarcseconds/year east if we saw them in the horizon. The Radial Velocity, that is the speed at which the star is moving away/towards us is -17.14000 km/s with an error of about 0.20 km/s .

Dalim 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 5.38 that I have given is based on the value in the Simbad Hipparcos Extended Catalogue at the University of Strasbourg from 2012.

Physical Properties (Colour, Temperature, Age) of Dalim

Dalim has a spectral type of F8V. This means the star is a blue to white main sequence dwarf star. The star is 7,405.00 Parsecs from the Galactic Centre or terms of Light Years is 24,152.40 s. The star has a B-V Colour Index of 0.54 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 6,122 Kelvin.

Dalim Radius has been calculated as being 2.04 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 1,417,657.23.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 2.06. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures. The star's Iron Abundance is -0.22 with an error value of 0.01 Fe/H with the Sun has a value of 1 to put it into context.

The stars age according to Hipparcos data files put the star at an age of about 3.00 Billion years old but could be between 2.80 and 4.10 Billion years old. In comparison, the Sun's age is about 4.6 Billion Years Old.

Dalim Apparent and Absolute Magnitudes

Dalim has an apparent magnitude of 3.80 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 3.05 If you used the 2007 Parallax value, you would get an absolute magnitude of 3.03. 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 Dalim

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 70.86 which gave the calculated distance to Dalim as 46.03 light years away from Earth or 14.11 parsecs. It would take a spaceship travelling at the speed of light, 46.03 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 70.24 which put Dalim at a distance of 46.44 light years or 14.24 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.

The star's Galacto-Centric Distance is 7,405.00 Parsecs or 24,152.40 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.

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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Dalim Facts

Visual Facts


 Dalim
Alternative NamesAlpha Fornacis, HD 20010, HIP 14879, HR 963, Gliese 127A
Spectral TypeF8V
Multiple Star SystemYes
Star Type main sequence Dwarf Star
Colour blue to white
GalaxyMilky Way
ConstellationFornax
Age3.00 Billion Years Old
Age Range2.80 - 4.10 Billion Years Old
Absolute Magnitude3.05 / 3.03
Visual / Apparent Magnitude3.80
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)03h 12m 04.28
Declination (Dec.)-28° 59` 20.8
Galactic Latitude-59.03 degrees
Galactic Longitude224.73 degrees
1997 Distance from Earth70.86 Parallax (milliarcseconds)
 46.03 Light Years
 14.11 Parsecs
2007 Distance from Earth70.24 Parallax (milliarcseconds)
 46.44 Light Years
 14.24 Parsecs
Galacto-Centric Distance24,152.40 Light Years / 7,405.00 Parsecs
Proper Motion Dec.611.33 ± 0.29 milliarcseconds/year
Proper Motion RA.370.87 ± 0.45 milliarcseconds/year
B-V Index0.54
Radial Velocity-17.14 ± 0.20 km/s
Iron Abundance-0.22 ± 0.01 Fe/H
Eccentricity0.37
Semi-Major Axis10765.00
Stellar Luminosity (Lsun)5.38

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Facts


Calculated Effective Temperature6,122 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
20010-29 1177.2A4.00000337.00000644.00000F8Yellow/White
B1836

Location of Dalim in Fornax


Dalim (Alpha Fornacis) Location in Fornax

The map was generated using Night Vision, an awesome free application by Brian Simpson.

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