Slight differences in longitudes will change the star of a person. In your case the star is Ardra which is there for about 72 minutes more since your birth. In fact variations in the star does not matter while evaluating a horoscope. Read my blog navagrahastro.blogspot.in to understand how to evaluate a horoscope scientifically. If you are interested you can contact me using Paid Consultation. Star related rituals and poojas are creations of fake astrologers. God does not differentiate in doling out good or bad depending on the star of an individual.