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I heard that object XYZZY approached the Sun closer than Mercury. Is it a Vulcanoid?

April 26, 2017approached heard mercury object Sun vulcanoid xyzzy

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I heard that object XYZZY approached the Sun closer than Mercury. Is it a Vulcanoid?

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Just because an object passes inside Mercury’s orbit does not make it a Vulcanoid. It needs a stable orbit with a mean distance that is less than Mercury’s 0.387 a.u. (about 57.9 million km) to be a Vulcanoid. See Question 1.1: “What is a Vulcanoid?” for more details.