Around 1.3 times as massive as the Sun , it has expanded to around 4.9 times the Sun 's diameter and 11 times its luminosity .
It is an evolved K - type giant around 4.6 billion years old .
Around 1.3 times as massive as the Sun , K - type giant has expanded to around 4.9 times the Sun 's diameter and 11 times its luminosity .
It is an evolved K - type giant around 4.6 billion years old .