How can I determine what star/constellation will appear at my zenith on a given date at a specified location using a generic Mercator projection star chart?How to read a mercator projection star chart?The stars whose declination is the same as your latitude will pass overhead.
Label the star chart in hours of right ascension.
Have your clock's regulator adjusted so the clock keeps the sidereal time rate. Find out your longitude, and set the clock so it displays local sidereal time.
Each star will transit your meridian at its right ascension (time).How to read a mercator projection star chart?This kind of chart would have the same problem that Mercator projections always have: increasing distortion towards the poles. A much better idea is to use printout from a planetarium software program like Starry Night, which uses conical projections with minimal distortion. There are various freeware programs which do similar charts.
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