”so from that you can make a theoretical sidereal ayanamsa to try.”
@ernst which theoretical ayanamsa were you implying here then please?
I am implying a tropical basis for nakshatras to be specific. I am not implying an ayanamsa. We do not have hte date of the vedanga jyotish accurate enough to make any sidereal ayanamsa projections. we have a 300 year range, 72 years is one degree of precession, so it does not help with any sidereal calculations at all.
@ernst thanks for clarifying. Wasn't the calculation I described the same as the "theoretical sidereal ayanamsa" as quoted from you below? (that's what I meant by "implying").
Agreed that without knowing the exact date of when VJ was written, the precision would be off, so not good for planetary degrees -- though for the scope of 108 Nakshatra padas, ~300 years would give a maximum error of ~1 pada. It's still guessing a bit though.
To precess 1 pada takes 238 years, which means if vedanga jyotish was written in 1000 BC, it would have been in 772 BC that Krittaka was on the vernal equinox. so from that you can make a theoretical sidereal ayanamsa to try.