Universe Guide

24 Leonis Minoris

24 Leonis Minoris Facts

24 Leonis Minoris's Alternative Names

The Id of the star in the Yale Bright Star Catalogue is HR4027. HIP50316 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD88986.

Flamsteed designations are named after the creator, Sir John Flamsteed. Sir John numbered the stars in the constellation with a number and the latin name, this star's Flamsteed designation is 24 Leonis Minoris with it shortened to 24 Lmi.

BD number is the number that the star was filed under in the Durchmusterung or Bonner Durchmusterung, a star catalogue that was put together by the Bonn Observatory between 1859 to 1903. The star's BD Number is BD+29 2021.

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

Location of 24 Leonis Minoris

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 24 Leonis Minoris, the location is 10h 16m 28.12 and +28° 40` 57.7 .

Radial Velocity and Proper Motion of 24 Leonis Minoris

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 -91.79 ± 0.25 milliarcseconds/year towards the north and -61.74 ± 0.44 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 28.83 km/s with an error of about 0.09 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.

24 Leonis Minoris 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 2.75 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 24 Leonis Minoris

24 Leonis Minoris Colour and Temperature

24 Leonis Minoris has a spectral type of G0V. This means the star is a yellow main sequence star. The star has a B-V Colour Index of 0.63 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 5,789 Kelvin.

24 Leonis Minoris Radius

Radius has been calculated as being 1.52 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 1,057,163.47.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 1.58. 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 0.04 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 6.50 Billion years old but could be between 4.20 and 7.40 Billion years old. In comparison, the Sun's age is about 4.6 Billion Years Old.

24 Leonis Minoris Apparent and Absolute Magnitudes

24 Leonis Minoris has an apparent magnitude of 6.46 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 3.93 If you used the 2007 Parallax value, you would get an absolute magnitude of 3.85. 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 24 Leonis Minoris

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 31.25 which gave the calculated distance to 24 Leonis Minoris as 104.37 light years away from Earth or 32 parsecs. It would take a spaceship travelling at the speed of light, 104.37 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 30.13 which put 24 Leonis Minoris at a distance of 108.25 light years or 33.19 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 6,845,881.22 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 7,417.00 Parsecs or 24,191.54 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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Additional 24 Leonis Minoris Facts and Figures

Visual Facts

Primary / Proper / Traditional Name24 Leonis Minoris
Alternative NamesHD 88986, HIP 50316, HR 4027, 24 Lmi, BD+29 2021
Spectral TypeG0V
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star Type Main Sequence Dwarf Star
GalaxyMilky Way
ConstellationLeo Minor
Age6.50 Billion Years Old
Age Range4.20 - 7.40 Billion Years Old
Absolute Magnitude 3.93 / 3.85
Visual / Apparent Magnitude6.46
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)10h 16m 28.12
Declination (Dec.)+28° 40` 57.7
Galactic Latitude55.88 degrees
Galactic Longitude201.09 degrees
1997 Distance from Earth31.25 Parallax (milliarcseconds)
 104.37 Light Years
 32 Parsecs
2007 Distance from Earth30.13 Parallax (milliarcseconds)
 108.25 Light Years
 33.19 Parsecs
 6,845,881.22 Astronomical Units
Galacto-Centric Distance24,191.54 Light Years / 7,417.00 Parsecs
Proper Motion Dec.-91.79 ± 0.25 milliarcseconds/year
Proper Motion RA.-61.74 ± 0.44 milliarcseconds/year
B-V Index0.63
Radial Velocity28.83 ± 0.09 km/s
Iron Abundance0.04 ± 0.01 Fe/H
Semi-Major Axis7066.00
Stellar Luminosity (Lsun)2.75

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Estimated Calculated Facts

Radius (x the Sun)1.58
Effective Temperature5,789 Kelvin

Sources and Links

SIMBAD SourceLink

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