def get_t_periastron(self, params):
		"""
		Return the time of periastron passage (calculated using `params.t0`).
		"""
		phase = self._get_phase(params, "primary")
		return params.t0 - params.per*phase
def get_t_periastron(self, params):
		"""
		Return the time of periastron passage (calculated using `params.t0`).
		"""
		phase = self._get_phase(params, "primary")
		return params.t0 - params.per*phase
def get_t_periastron ( self , params ) : phase = self . _get_phase ( params , "primary" ) return params . t0 - params . per * phase
Return the time of periastron passage (calculated using `params.t0`).
Return the time of periastron passage ( calculated using params . t0 ) .