The rest frequencies were taken from
(1) L. Dore, L. Bizzocchi, E. S. Wirström, C. Degli Esposti, F. Tamassia, and S. B. Charnley, 2017, Astron. Astrophys. 604, Art. No. A26.
The predictions are sufficiently accurate for all radio astronomical observations.
The dipole moment was assumed to agree with that of the main species, see e029506.cat.