सिद्धान्तदर्पण (महामहोपाध्याय सामन्त चन्द्रशेखर सिंह - नग्न-नेत्र खगोल वेध एवं गणित महाकोश)

lviii सिद्धान्त दर्पण
application of the Sun's place, calculated after the
Surya-Siddhanta (S.D.VI.89). Assuming his
calculated place to be correct, it is easy to find the
beginning of the starting point of measurement. In
the absence of a better method, this remains the
only feasible course of procedure, and it is by this
method that we have got the present ayanamsa.
It will be noticed (S.D.XII.10) that
Chandrasekhara gives 5°N. as the polar latitude of
Revati. The fact is, he has given up the Revati of
our ancient astronomy for the simple reason that
the Siddhanta Revati is hardly recognisable, and
therefore practically useless. His Revati is not ζ
(zeta) but η (eta) Piscium. How far this innovation
will be acceptable to the public, remains to be seen.
Instances of giving old names to new stars are
not rare, and this appears to be one of the main
difficulties in identifying stars of different
Siddhantas. For example, the star Pushya of
Varaha-mihira's Surya-Siddhanta must have been a
different star from the one receiving the same name
in the current Surya-Siddhanta. For Pushya of old
appears to have been Proesepe of the Greeks, while
modern Pushya is δ Cancri.
It may be useful to knwo the stars to which
Chandrasekhara applies the Siddhanta names. For
this purpose I got a chart of the stars made by him
from which the following list is prepared.

1. Asvini ά Arietes
2. Bharani 41 Arietes
3. Krittika Tauri (Pleides)
4. Rohini ά Tauri (Aldebaran)
5. Mrigasira λ Orionis