How Do You Calculate When a Star Reaches Its Highest Point Using Sidereal Time?

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To calculate when a star reaches its highest point in the sky using sidereal time, one must determine the star's right ascension and declination. The highest point, or culmination, occurs when the star crosses the local meridian. This can be calculated by converting the right ascension into time, noting that one hour of right ascension corresponds to 15 degrees of the celestial sphere. The local sidereal time can then be compared to the star's right ascension to find the exact time of culmination. For further guidance, a tutorial is available at the provided website.
Reugar
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Hello, sorry I wasnt sure if this should be in the physics section of homework, but I didn't see anything where the astronomy section was...anyways.

Im reviewing sidereal time systems, so given a right ascention and declination, I need to calculate what time an object is at its highest point in the sky (ie when it crosses the meridian?) How do I do this calculation?
 
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