@property<EOL><INDENT>def RV_2(self):<DEDENT>
return -self.orbpop_long.RV * (self.orbpop_long.M1 /<EOL>(self.orbpop_long.M1 + self.orbpop_long.M2)) +self.orbpop_short.RV_com1<EOL>
Instantaneous RV of star 2 with respect to system center-of-mass