\\ Species Tag: & 44010 & Name:& HCP \\ Version: & 1 & & Methylidyne- \\ Date: & April 1994 & & phosphine, \\ Contributor:& H. M. Pickett & & X $^1 \Sigma ^+$ \\ & & & \\ Lines Listed: & 34 & Q(300.0)=& 312.033 \\ Freq. (GHz) $<$ & 1355 & Q(225.0)=& 234.963 \\ Max. J: & 34 & Q(150.0)=& 156.856 \\ LOGSTR0= & -5.3 & Q(75.00)=& 78.578 \\ LOGSTR1= & -3.6 & Q(37.50)=& 39.455 \\ Isotope Corr.: & 0.0 & Q(18.75)=& 19.898 \\ Egy. (cm$^{-1}$) $>$& 0.0 & Q(9.375)=& 10.120 \\ $\mu_a$ = & 0.039 & A=& \\ $\mu_b$ = & & B=& 19976.0 \\ $\mu_c$ = & & C=& \headend The rotational transitions and dipole moment are from J. K. Tyler, 1964, J. Chem.\ Phys.\ {\bf 40}, 1170. Additional rotational lines are from J. W. C. Johns, J. M. R. Stone, and G. Winnewisser, 1971, J. Mol.\ Spect.\ {\bf 38}, 437.