API Reference / mundaneDirectionArc · function

Function: mundaneDirectionArc()

function mundaneDirectionArc(
   alphaP, 
   deltaP, 
   alphaS, 
   deltaS, 
   ramc, 
   phi): number | null;

Placidus semi-arc mundane directional arc (degrees) for promissor P to significator S: arc = MD_p - (MD_s / SA_s) * SA_p. null if either body is circumpolar. Reduces to the to-MC arc when S is on the meridian, and to 0 when P and S coincide.

Parameters

Parameter	Type
`alphaP`	`number`
`deltaP`	`number`
`alphaS`	`number`
`deltaS`	`number`
`ramc`	`number`
`phi`	`number`

Returns

number | null