Universe Guide

Gamma2 Fornacis

Gamma2 Fornacis Facts

  • Gamma2 Fornacis is a main sequence star that can be located in the constellation of Fornax. The description is based on the spectral class.
  • Gamma2 Fornacis is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (A1V) 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 458.74 light years away from us. Distance

Gamma2 Fornacis's Alternative Names

Gamma2 Fornacis (Gam02 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 HR845. HIP13202 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD17729.

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

Location of Gamma2 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 Gamma2 Fornacis, the location is 02h 49m 54.15 and -27° 56` 31.3 .

Radial Velocity and Proper Motion of Gamma2 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 21.85 ± 0.20 milliarcseconds/year towards the north and 46.92 ± 0.28 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 24.00000 km/s with an error of about 4.20 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 Gamma2 Fornacis

Gamma2 Fornacis Colour and Temperature

Based on the star's spectral type of A1V , Gamma2 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 9,392 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu.

Gamma2 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 132.51 that I have given is based on the value in the Simbad Hipparcos Extended Catalogue at the University of Strasbourg from 2012.

Gamma2 Fornacis Radius

Gamma2 Fornacis estimated radius has been calculated as being 5.00 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 3,482,403.77.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 4.1437226010795690675487857408. 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.

Gamma2 Fornacis Apparent and Absolute Magnitudes

Gamma2 Fornacis has an apparent magnitude of 5.39 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 -0.76 If you used the 2007 Parallax value, you would get an absolute magnitude of -0.35. 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 Gamma2 Fornacis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 5.88000 which gave the calculated distance to Gamma2 Fornacis as 554.70 light years away from Earth or 170.07 parsecs. If you want that in miles, it is about 3,260,873,494,504,948.47, based on 1 Ly = 5,878,625,373,183.61 miles.

In 2007, Hipparcos data was revised with a new parallax of 7.11000 which put Gamma2 Fornacis at a distance of 458.74 light years or 140.65 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 29,010,942.85 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 7,447.00 Parsecs or 24,289.38 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 Gamma2 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)
Airbus A380736417,987,326.61
Speed of Sound (Mach 1)767.269400,952,824.09
Concorde (Mach 2)1,534.54200,476,150.76
New Horizons Probe33,0009,322,384.01
Speed of Light670,616,629.00458.74

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 Gamma2 Fornacis Facts and Figures

Visual Facts

Primary / Proper / Traditional NameGamma2 Fornacis
Alternative NamesGam02 For, HD 17729, HIP 13202, HR 845
Spectral TypeA1V
Constellation's Main StarNo
Multiple Star SystemYes
Star Type Main Sequence Dwarf Star
GalaxyMilky Way
Absolute Magnitude -0.76 / -0.35
Visual / Apparent Magnitude5.39
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)02h 49m 54.15
Declination (Dec.)-27° 56` 31.3
Galactic Latitude-63.79008761 degrees
Galactic Longitude221.63502992 degrees
1997 Distance from Earth5.88000 Parallax (milliarcseconds)
 554.70 Light Years
 170.07 Parsecs
2007 Distance from Earth7.11000 Parallax (milliarcseconds)
 458.74 Light Years
 140.65 Parsecs
 29,010,942.85 Astronomical Units
Galacto-Centric Distance24,289.38 Light Years / 7,447.00 Parsecs
Proper Motion Dec. 21.85000 ± 0.20000 milliarcseconds/year
Proper Motion RA.46.92000 ± 0.28000 milliarcseconds/year
B-V Index0.01
Radial Velocity24.00000 ± 4.20 km/s
Semi-Major Axis7325.0000000
Stellar Luminosity (Lsun)132.5100000
Associated / Clustered StarsGamma1 Fornacis

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Estimated Calculated Facts

Radius (x the Sun)4.14
Effective Temperature9,392 Kelvin

Sources and Links

SIMBAD SourceLink

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