Newton's birth time is uncertain. It is sometimes helpful to make use of arabic parts in rectification, albeit as a gross approximation.
Taking into consideration of the footnote given with his chart (see:
http://www.skyscript.co.uk/newtonchart.html) and seeing the chart given there (25 December 1642 OS, Woolsthorpe, 01:39 hr GMT +0:00) does not conform to the criteria of the Part of Reasoning for an intellectual of Newton's caliber, I took the one that is exactly one hour ahead by Solar Fire: 25 December 1642 OS, 02:39 hr GMT +0:00.
The ascendant then becomes 6 degrees 5 minutes Scorpio, which, in my opinion, fits far better than Libra for a secretive man like Newton to start with; a man, who dedicated his entire life to exploring the secrets of the universe.
As I haven't checked it out rigorously yet except for a few quick tests with firdaria and profections that seemed fine and promising, I am not sure if this new chart fits better to his life events. But the Part of Reasoning certainly describes his genius much better, indicating that he might have been born two hours (not one hour) after midnight as stated as a possibility in the reference.
For this new chart, the Part of Reasoning is at 19 degrees 32 minutes Gemini (PR = Asc + Mercury - Mars for a nocturnal nativity).
Domicile ruler of the Part is Mercury and it receives the Part albeit by a tight opposition. Similarly other rulers, Saturn and Jupiter, both being triplicity rulers of Gemini aspects the Part by square. The Part is well-disposed and active for it is aspected by its three rulers.
Venus, one of the triplicity rulers at the ascendant casts her whole-sign trine to the Part.
Mercury is in aspect with the significators too:
- opposite the Part
- sextile Venus (triplicity ruler of the Asc)
- square Jupiter and Saturn (both being the triplicity rulers of the Part)
Finally, Mars receives the Asc by a tight opposition (so aspecting the ascendant), and is sextile to the Moon (trip. ruler of the Asc) and to Jupiter (trip. ruler of the Part).
If this birth time is correct, it is interesting to note another similarity: Location of the part of Reasoning is exactly the same for both Newton and Dr.Katsioulis!..
I will appreciate any comments.
Sigma