[Q]jyoti.h'saastra - what is "catarchic"?

[thayashi at doshisha.ac.jp]

Birgit Kellner wrote:
>A student at our institute wants to study jyoti.h'saastra and came across
>the expression "catarchic astrology". Would any of the distinguished
>list-members know what it means? We could't find this expression in any
>available dictionary. 
>
>TIA, 

It is a kind of astrology concerning the determination of a time
appropriate for the beginning (Gr. catarche) of an action.

Hayashi