Defines Centaurs

Some articles on centaur, defines centaurs:

(44594) 1999 OX3 - Classification
... The Minor Planet Center (MPC) does not classify this object as a centaur because the MPC defines centaurs as having a semi-major axis of less than 30.066 AU ... The Deep Ecliptic Survey (DES) defines centaurs using a dynamical classification scheme, based on the behavior of orbital integrations over 10 million ... The DES defines centaurs as nonresonant objects whose osculating perihelia are less than the osculating semimajor axis of Neptune at any time during the integration ...

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    To exist is equivalent to an act of faith, a protest against the truth, an interminable prayer.... As soon as they consent to live, the unbeliever and the man of faith are fundamentally the same, since both have made the only decision that defines a being.
    E.M. Cioran (b. 1911)