How close is it?

[ZeeJustin]

I like a preflop push, but I'm mainly posting to show you wanting a trash hand instead of A9s is wrong.

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I don't particularly like making moves like these with marginal aces, I might prefer complete trash (i.e, live cards) but it really depends on the feel of the situation

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Let's assume you get called by:
AA-88, AKs-AJs, KQs, AKo-AQo

This not far off from the worst possible range of hands to get called by for A9s.

A9s has 32.977% equity
76s (a very strong "live" hand) has 30.452% equity
22 has 34.311% equity.
72o (the definition of complete trash) has 21.359% equity

Against AA-99, AKs-A9s, AKo-ATo (aka the worst possible range of hands for A9s to get called by, albeit a bit unrealistic)
A9s has 31.085% equity
76s has 33.878% equity
22 has 39.891% equity
72o has 24.719% equity

I think this shows that compared to hands that can't expect to be called by a worse hand, A9s is a pretty good hand to push with.