\\ Species Tag: & 29005 & Name:& NNH+ \\ Version: & 1 & & Diazenylium \\ Date: & Jan. 1984 & & X $^1 \Sigma ^+$ \\ Contributor:& R. L. Poynter & & \\ & & & \\ Lines Listed: & 34 & Q(300.0)=& 1210.877 \\ Freq. (GHz) $<$ & 2971 & Q(225.0)=& 909.076 \\ Max. J: & 32 & Q(150.0)=& 607.016 \\ LOGSTR0= & -3.3 & Q(75.00)=& 304.930 \\ LOGSTR1= & -3.1 & Q(37.50)=& 153.993 \\ Isotope Corr.: & 0. & Q(18.75)=& 78.560 \\ Egy. (cm$^{-1}$) $>$& 0.0 & Q(9.375)=& 40.888 \\ $\mu_a$ = & 3.40 & A=& \\ $\mu_b$ = & & B=& 46586.867 \\ $\mu_c$ = & & C=& \headend The experimental measurements were reported by: R. J. Saykally, T. A. Dixon, T. G. Anderson, P. G. Szanto, and R. C. Woods, 1976, Astrophys.~J. Lett.~Ed. {\bf 205}, L101. K. V. L. N. Sastry, P. Helminger, E. Herbst, and F. C. De~Lucia, 1981, Chem.~Phys.~Lett.~{\bf 84}, 286. F. C. Van den Heuvel and A. Dymanus, 1982, Chem.~Phys.~Lett.~{\bf 92}, 219. The dipole moment was estimated theoretically by S. Green, J. A. Montgomery, Jr., and P. Thaddeus, 1974, Astrophys. J. {\bf 193}, L89.