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23 Librae

The yet sunlike star 23 Librae is at the end of its life as a yellow main sequence star and has already started to expand. Although very old it is rich with heavy elements.
A planet with 1.58 the mass of Jupiter orbits the star in an excentric orbit with 0.62 - 1.00 AU distance every 260 days. In a few million years 23 Librae will be a fully grown red giant, then it will swallow up its planet.

Constellation: Libra
Age: 8.6 billion years
Distance: 83.7 light-years
Spectral class: G5
Visual magnitude: 6.45
Luminosity: 1.51 * Sun
Mass: 1.05 * Sun
Diameter: 1.25 * Sun
Radial velocity: 5.5 km/sec

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    23 Librae
Foto: ESO Online Digitized Sky Survey

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