Calculating Star Visibility: RA and DEC at 09:30 on May 21st

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Chronos000
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Homework Statement



If at 09:30 21st may what would the RA of stars be at the zenith?

I'm not sure if we can say that they are at 3.5hrs since we are in may?

If a star is at RA 5hrs would at 09:30 would it be observable at 00:00.

My thoughts are that you just add on 14.5 hrs to the RA at 09:30, and we want it to be 12 hours from where the sun would be. but the sun would be at pretty much the same RA
 
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09:30 21st May using what time scale? Local time? (If so, what's your location?) Universal Time? GMT? Dynamical Time?