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18 Scorpii

The yellow main sequence star is of all known stars the one most similar to our Sun. Even its rotation period is nearly identical. The sunspot cycle is seven years long (that of the Sun is eleven years). Unfortunately there haven't been any planets discovered yet.

Constellation: Scorpius
Age: 4.2 billion years
Distance: 45.7 light-years
Spectral class: G2
Visual magnitude: 5.50
Luminosity: 1.05 * Sun
Mass: 1.012 * Sun
Diameter: 1.02 * Sun
Radial velocity: 12 km/sec

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Photo: ESO Online Digitized Sky Survey
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