\\ Species Tag: & 50009 & Name:& MgCN \\ Version: & 1 & & Magnesium monocyanide, \\ Date: & Sept. 1995 & & X $^2\Sigma$ \\ Contributor:& J. C. Pearson & & \\ & & & \\ Lines Listed: & 273 & Q(300.0)=& 2457.0064 \\ Freq. (GHz) $<$ & 999 & Q(225.0)=& 1842.8710 \\ Max. J: & 99 & Q(150.0)=& 1228.4190 \\ LOGSTR0= & -8.0 & Q(75.00)=& 614.3377 \\ LOGSTR1= & -8.0 & Q(37.50)=& 307.4515 \\ Isotope Corr.: & & Q(18.75)=& 154.0476 \\ Egy. (cm$^{-1}$) $>$& 0.0 & Q(9.375)=& 77.3566 \\ $\mu_a$ = & 1.000 & A=& \\ $\mu_b$ = & & B=& 5094.80 \\ $\mu_c$ = & & C=& \headend The observed lines are from: M. A. Anderson, T. C. Steimle and L. M. Ziurys, 1994, Astrophys. J. {\bf429}, L41. The dipole moment is unknown and has been assumend to be unity. The molecule is in a $^2\Sigma$ electronic ground state.