This link of the NASA site is pretty eloquent. It's the tiem of the sun-constellation transits nowadays, it changes everything compared to Chaldean astronomy-astrology. Also, pls note the Sun transits in Scorpius only 7 days, whereas it transits in Ophiuchus (a constellation not included in the zodiac) 18 days.
i would not be a Leo, I'd rather be a cancer (but I don't know if the dates are the same as in 1960).
Sorry mccoy but you do not understand astrology. You are still a Leo unless of course you subscribe to Vedic astrology. In western astrology you are a Leo. You do not understand the tropical zodiac and it's meaning. It is solar based... not star based.