Laboratory and astronomical lines were reported by
(1) P. B. Changala, H. Gupta, J. Cernicharo, J. R. Pardo, M. Agúndez, C. Cabezas, B. Tercero, M. Guélin, and M. C. McCarthy, 2022, Astrophys. J. Lett. 940, Art. No. L42.
The astronomical frequencies were judged somewhat optimistically; the uncertaintiies were multiplied with a factor of 1.5. Three quartic distortion parameters were kept fixed to values from
(2) A. G. Watrous and R. C. Fortenberry, 2023, Mon. Not. R. Astron. Soc. 518, 5140.
The quantum number were limited to 11 because of the limited experimental data. The calculations are sufficient for observations in cold sources and somewhat sufficient in luke warm sources. Transition frequencies with calculated uncertainties exceeding 0.3 MHz should be viewed with some caution.
The dipole moment was taken from a quantum-chemical calculation in
(3) S. Itono, K. Takano, T. Hirano, and U. Nagashima, 2000, Astrophys. J. 538, L163;
the value in 3 agree with this value.