I was born on 15 Jan 1973 and the time range is 9.30 to 11.30 PM
Alwaye, Kerala, and in Rohini nakshatra

But my physical existence show that i am virgo ascendant. To be born in Virgo ascendant then the birth time should be between 22.18:51 to 24.18.00.

Now I am sure that I would have born between these time, most probably near to the lower end as per information from the relatives.

Now there are certain events like

My fathers death on 16-11-2002 around 1.30 am

and my marriage 11-01-2004

my first son (only son) born on 22-06-2005 at 11.18 am

and I am properly educated and have first rank in mechanical engineering and now working as a scientist in a well know research institution in the country.

From these detail is it possible to narrow down the range, if not to the exact min and sec?