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Almost everybody knows the concept of Zodiac. But there are others. And, AFAIK, even Zodiac classification is wrong for nowadays - since the classification of the people's Zodiac Sign was developed thousands years ago, when the stars were in a slightly different positions.

I don't really care about this stuff. But I want to know for sure, given the exact birth time and location, what star was over my head, if I looked straight up?

How can I calculate what star was above my head within a reasonable margin of error?

P.S. I don't mean any kind of software, that does all the job - I mean the algorithm, which includes the calculations (on the paper), and some related knowledge database about all known stars and their trajectories.

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closed as unclear what you're asking by called2voyage Mar 31 '14 at 18:34

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question.If this question can be reworded to fit the rules in the help center, please edit the question.

Hi, as worded this isn't really fit for this site, especially given we don't know when or where you were born (and i suggest not giving out personal information on the internet!) – RhysW Mar 25 '14 at 17:03
@RhysW The question is about calculations, or about services that provide such information. – abyss.7 Mar 25 '14 at 17:05
Hi, I edited the question a little more to focus your question – RhysW Mar 25 '14 at 17:08
This sounds an awful lot like this question:… – called2voyage Mar 25 '14 at 17:22
abyss.7, it is unclear whether or not this is a software request. If it is, then it is off topic. – called2voyage Mar 31 '14 at 18:35

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