Question: Hankel function asymptotic form

In Arfken(Mathematical methods for physicists,5-th edition,page 483),the asymptotic form of the Hankel function is approximated as

H1(t,s)=

sqrt(2/(Pi*s))*exp(I*(s-t*(Pi/2)-Pi/4))

Is there any simple/direct way in Maple(using HankelH1(),or otherwise) to achieve this?I don't want to assign numerical values to t or s.

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