Matthew's account of the star is proved correct IF a temporary
celestial phenomenon is discovered within the biblical timeline (7 BC
to 4 BC) that fits the definition of "asterism".

No one, other than the Magi, saw the 'star' (according to the texts).
Even Herod replied (to the Magi) "what star"?

To conclude, without first investigating all reasonable possibilities,
that the account is fiction is unsupportable by all academic standards.