Khoo
Thank you for the reply. In my researches I manage to find some logics for the relations of the stars with the Nakshatras, but are some really puzzeling.
Regarding your example: I consider Spica (30º Vir) ruling Chitta, but for Swati i consider Symra (l Vir)- 09º48 Lib
I'm following an article from Dr. Balakrishna were you can see some similar considerations on other nakshatras. Although I'm not 100 % convinced by some attributions it's a very interesting point of view.
This matter is really a puzzle for me. I start to study back the sources of this , and i get lost. The ancients sources talk about the 27 nakshastras and the list of the names is well know, with the list comes also the number of stars associated to each nakshastras ( the name nakshastra means asterism of stars) : Ashvini - 3 stars , Bharani - 3 stars, Krittika - 6 stars and so on.
I found also that the first lists started with Krittika , being this the 1st Nakshastra and not Ashvini, and that the star related with this nakshastra are the Pleiades.
For me now there are 2 options: Or we find new stars to atribute to each Nakshastra or we have to re-think the limits of each house. For eg.:
We know that the Pleiades belong to Krittika, in the present division these stars are in the 3rd pada of Krittika - 05º Tau . So imagine that we consider that the Pleiades are the 1st degrees of Krittika, that they are on the 1st pada, and we redesign the rest of the nakshastras from this point?
Well these all are a rumble of thoughts and doubts....

ehehehhe
Let me know what do you think about all this.
Best Regards
Ricardo