I think it’s at a sort of weird crossroads between superstition and factual data, because it is trivial to calculate the factual data regarding the position of any star in the sky at any point, but the superstition comes in when you associate the positions of a rather arbitrary group of stars in relation to a date of birth.

I just thought of this though- you could argue that this is an anti-astrology security measure because it proves that you can’t guess someone’s zodiac sign based on things like their interests and personality traits.