Notes. ^(a) A, B, and C represent the rotational constants (in MHz). ^(b)|µ_a|, |µ_b|, |µ_c| are the absolute values of the electric dipole moment components (in D), obtained theoretically in Neill et al. (2012). ^(c) Root mean square (RMS) deviation of the fit. ^(d) Dimensionless rms, defined as ${\sigma }_w=\sqrt{\frac{{\displaystyle \sum _i{\left({\delta }_i/er{r}_i\right)}^2}}{N_A}}$, where the δ’s are the residuals weighted by the experimental uncertainty and N_A the total number of measured transitions analyzed belonging to the A-symmetry substate.