Universe Guide

AF Leonis

AF Leonis Facts

AF Leonis's Alternative Names

The Id of the star in the Henry Draper catalogue is HD99635.

AF Leonis has alternative name(s) :- AF Leo.

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

Location of AF Leonis

The location of the 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 AF Leonis, the location is 11 27 53.1458929120 and +15 08 48.410360795 .

Radial Velocity and Proper Motion of AF Leonis

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 8.56 milliarcseconds/year towards the north and -24.19 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 6.00 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) of AF Leonis

AF Leonis Colour and Temperature

AF Leonis has a spectral type of M5 D~. This means the star is a red star.

Distance to AF Leonis

The Parallax of the star is given as 1.98 which gives a calculated distance to AF Leonis of 1644.22 light years from the Earth or 504.11 parsecs. It would take a spaceship travelling at the speed of light, 1644.22 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

The star is roughly 103,979,426.94 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.

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Additional AF Leonis Facts and Figures

Visual Facts

Primary / Proper / Traditional NameAF Leonis
Alternative NamesAF Leo, HD 99635
Spectral TypeM5 D~
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeStar
GalaxyMilky Way
Right Ascension (R.A.)11 27 53.1458929120
Declination (Dec.)+15 08 48.410360795
Distance from Earth1.98 Parallax (milliarcseconds)
 1644.22 Light Years
 504.11 Parsecs
 103,979,426.94 Astronomical Units
Proper Motion Dec.8.56 milliarcseconds/year
Proper Motion RA.-24.19 milliarcseconds/year
Radial Velocity6.00 km/s

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Sources and Links


Related Stars

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