A genetic study just published (conducted in 2014) examined DNA sequences in semen stains found on a shawl near Catherine Eddowes’ body. (She was Canonical #4.) They match DNA sequences of barber Aaron Kosminski, a leading suspects at the time. Kosminski was born September 11, 1865, 10:00 PM, Klodawa, Poland according to his birth record.
The natal chart does not strain credulity. Immediately we see a close Mars-Neptune opposition, closely trine-sextile Venus, which in its darker expression is easily pathologically vile with erotic elements interwoven. Jupiter is visibly foreground, closely square a Leo Sun which would suggest a very high view of himself, that one might guess is true, though we don't know it to be true.
In fact, though, there are hidden layers of this chart only visible in the mundoscope. This was an era in which Pluto's latitude caused it to rise long after its longitude crossed the east. Look at these mundane aspects (and I'll include all the angularities for completeness):
Uranus 5°35' before Asc
Moon 1°29' past Asc
Jupiter 2°44' past Asc
Pluto 3°32' past Asc
The rising Moon-Pluto conjunction becomes a centerpiece of the chart. Taurus Moon says that whatever wonderful or dreadful aspects his life expressed would be expressions of the erotic.
Relocate the chart to London and Midheaven is 6°45' Capricorn, square his Saturn. Moon, Jupiter, and Pluto are removed from the angles but remain in their fairly close mundane aspectual alignment. He moves from a background Venus in 0°02' mundane square to Saturn to a middleground Venus without that aspect.
An interesting aside (though I can't claim this is a confirmed valid technique): His Novien has Mars 16°48' Virgo opposite Saturn 16°25' Pisces. Compare this to the Mars-Neptune in the natus! (The Novien has a few other interesting characteristics, especially in relation to the nativity.)
The first known "Ripper" murder occurred August 31, 1888 at 3:40 AM One other occurred before Kosiminski's birthday, then three after, ending (according to official opinion) November 11, 1888, 10:45 AM.
For the first murder, the first thing I notice is that transiting Neptune is conjunct by 0°03' his London Ascendant! (Pluto had passed it not long before.) Transiting Mars was semi-square natal Mars 0°19'. Transiting Moon for the first murder was the exact degree, in fact within minutes, of his natal Ascendant. and transiting Mars within 1° of his natal Westpoint.
Progressed Moon conjoined natal Neptune 0°23', trine natal Venus 0°07', having recently moved through the whole of his Mars-Neptune and, before the killing spree was over, to oppose his progressed Sun in a perfected Full Moon. I dare say these murders (if he did them) were intimate.