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Kepler 99 (Planet Orbiting Star) Facts

Kepler 99 Facts

  • Kepler 99 is a star that can be located in the constellation of Cygnus. The description is based on the spectral class.
  • Kepler 99 is not part of the constellation outline but is within the borders of the constellation.
  • It is calculated at being 1.470 Billion Years old. This information comes from ExoPlanet.
  • Kepler 99 has a radius that is 0.73 times bigger than the Suns. Radius
  • The star is calculated at being about 683.72 light years away from us. Distance

Location of Kepler 99

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 Kepler 99, the location is 19 49 25 and 41 18 00 .

Radial Velocity and Proper Motion of Kepler 99

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 -3.22 milliarcseconds/year towards the north and 1.38 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 -23.00000 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.

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Additional Kepler 99 Facts and Figures

Visual Facts


Primary / Proper / Traditional NameKepler 99
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeStar
GalaxyMilky Way
ConstellationCygnus
Age1.47 Billion Years Old
Right Ascension (R.A.)19 49 25
Declination (Dec.)41 18 00
Distance from Earth4.77040 Parallax (milliarcseconds)
 683.72 Light Years
 209.63 Parsecs
 43,238,990.04 Astronomical Units
Proper Motion Dec.-3.22000 milliarcseconds/year
Proper Motion RA.1.37900 milliarcseconds/year
Radial Velocity-23.00000 km/s

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Calculated Facts


Radius (x the Sun)0.73
Calculated Temperature Range0.00 - 0.00
Mass Compared to the Sun0.79

Sources and Links


Sourcehttp://simbad.u-strasbg.fr/simbad/sim-id?Ident=kepler99

List of Extrasolar Planets orbiting Kepler 99


NameStatusMass (Jupiters)Orbital Period (Days)EccentricityDiscoveredSemi-Major AxisPeriastron
Kepler-99 b0.0194.6002014

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