Mark wrote:
Statistical examinations of astronomical cuneiform tablets by Peter Huber in 1958 provided an ayanamsha that differs by less than an arc minute from the Fagan/Bradley ayanamsha. However, according to a more recent investigation by John P. Britton (2010), the difference could still amount to several arc minutes. Nevertheless , this is certainly much closer to the Babylonian ayanamsha than Indian ayanamsha such as Lahiri.
Mark, you didn't give a full reference for this, but in Britton's "Studies in Babylonian lunar theory: part III, The introduction of the uniform zodiac," (2010) three stars are noted as marking the beginning of signs in the Babylonian zodiac. Two of these stars are some minutes from the Lahiri/Krishnamurti zodiacs, and one star is very close to the Fagan-Bradley (so called 'Babylonian') zodiac.
I suppose we can say that statistical analysis is one thing while the actual recorded positions of stars are another. There is no evidence that computations back then were precise to the minute. This precision is an artifact of scholarship of our modern times. In the ancient tablets so far deciphered there are no longitudes given for the prime marking stars in the Fagan zodiac: Aldebaran and Antares. Concern was apparently only for the boundary stars that marked the beginning of signs.
In an earlier book (
Astronomy Before the Telescope, 1996, "Astronomy and Astrology in Mesopotamia" p. 49) Britton stated that "The sidereal zodiac appears to have been fixed so that the longitude of the bright star Beta Gemini was 90 degrees." This star is Pollux located in 29 Gemini 28 in the Krishnamurti zodiac and 59 minutes less in the Fagan-Bradley zodiac.
We can be sure of one fact, however. Both the Fagan-Bradley zodiac and the Lahiri/Krishnamurti values are well within the ball park of the ancient Babylonian values. But precision to the minute was not known then. I have tables of Babylonian planetary degrees from Francesca Rochberg (
Babylonian Horoscopes, 1998) on my web site:
http://users.snowcrest.net/sunrise/arochberg.htm
"Planet Longitudes in Babylonian Horoscopes"
The Three Stars:
Beta Gemini, Pollux: K longitude: 29 Gem 28
Delta Capricorn, Deneb Algedi: K longitude: 29 Capricorn 47
Zeta Taurus, Al Hecka: F-B longitude: 0 Gem 02
(I believe that Britton's 2010 article was finalized for publication after his death.)