The conversation between human and AI assistant.
[|Human|] From the passage provided, extract the distance between Mercury and Sun in AU when it is closest to the sun in its orbit.
[|AI|] Mercury has egg shaped orbit. The distance between the Sun and the Mercury when Mercury is closest to the sun it is orbit is 0.307 AU.
[|Human|] 
From the passage provided, extract the distance between Mercury and Sun in AU when it is closest to the sun in its orbit.