[Jagannath] Upagrahas article by Sri Goel

[Guest guest]

Pranaam Sanjay,

Sri Goel's article on "Upagrahas" in the latest "Jyotish News" is excellent.

But I don't think the formulas of Vyatipata and Indrachapa are correct.

If you change + to - in the formula of Indrachapa, it will make some sense

and it will match Santhanam's formula in his translation of BPHS. Still

it is incorrect. What you gave in your Jamini book is correct. Parasara,

Phaladeepika etc agree on it.

(1) Correct (Parasara, Phaladeepika, Sanjay Rath's Jaimini book):

Dhuma = Sun + 133 deg 20 min

Vyatipata = 360 deg - Dhuma

Parivesha = Vyatipata + 180 deg

Indrachapa = 360 deg - Parivesha

Upaketu = Indrachapa + 16 deg 40 min

Sun = Upaketu + 30 deg (yes!)

(2) Santhanam (incorrect, but consistent):

Dhuma = Sun + 133 deg 20 min

Vyatipata = Dhuma + 53 deg 20 min

Parivesha = Vyatipata + 180 deg

Indrachapa = Parivesha - 53 deg 20 min

Upaketu = Indrachapa + 16 deg 40 min

Sun = Upaketu + 30 deg (yes!)

(3) Goel (incorrect & inconsistent - math breaks down):

Dhuma = Sun + 133 deg 20 min

Vyatipata = Dhuma + 53 deg 20 min

Parivesha = Vyatipata + 180 deg

Indrachapa = Parivesha + 53 deg 20 min

Upaketu = Indrachapa + 16 deg 40 min

Sun = Upaketu + 30 deg (nope!)

JHLite 1.1 supports only (1). In JHLite 2.0, I am giving

an option between (1) and (2). I will ignore (3), because it is obviously

wrong (perhaps a typo).

Your sishya,

Narasimha