\\ Species Tag: & 40006 & Name:& C2O \\ Version: & 1 & & Dicarbon monoxide \\ Date: & April 1996 & & X $^3 \Sigma ^-$ \\ Contributor:& H. S. P. M\"uller & & \\ & & & \\ Lines Listed: & 354 & Q(300.0)=& 1625.5036 \\ Freq. (GHz) $<$ & 1632 & Q(225.0)=& 1219.2029 \\ Max. J: & 70 & Q(150.0)=& 812.8704 \\ LOGSTR0= & -9.0 & Q(75.00)=& 406.6471 \\ LOGSTR1= & -8.0 & Q(37.50)=& 203.5847 \\ Isotope Corr.: & & Q(18.75)=& 102.0790 \\ Egy. (cm$^{-1}$) $>$& 0.0 & Q(9.375)=& 51.3580 \\ $\mu_a$ = & 1.305 & A=& \\ $\mu_b$ = & & B=& 11545.597 \\ $\mu_c$ = & & C=& \headend The data were taken from (1) C. Yamada, S. Saito, H. Kanamori, and E. Hirota, 1985, Astrophys. J. {\bf 290}, L65, and (2) Y. Ohshima, Y. Endo, and T. Ogata, 1995, J. Chem. Phys. {\bf 102} 1493. The dipole moment is from an $ab \ initio$ calculation: (3) C. Thomson and B. J. Wishart, 1973, Theor. Chim. Acta {\bf 31}, 347.