There r 2 versions for the ephemerides. NASA + minorplanetcenter.net(astro.com uses it).
For the 1900's it's 50' difference. no worrys.
For 1643(newton) it's 20degrees difference. nasa=20° libra,mpc=0° libra
Yet for galileo+shakespeare+nostradamus it's about the same. very strange.
I like NASA version.
In nostradamus chart it conjuncts jupiter+saturn in cancer, awesome.
enjoy