Knowledge Bank

The (0,1), (0,0), (1,0) and (2,0) bands of $B\to X$ system of antimony monoxide have been excited in RF discharge tube source and photographed in the $9th$ order of a 2 - meter plane grating spectrograph (PGS-2). Intensity records of the rotational lines have been obtained. The intensity measurements of Q and P branch lines of the above four bands and J numberings are used to estimate the effective rotational temperature of the source emitting the spectrum of $\mathrm{<mrow\; data-mjx-texclass="ORD">121</mrow>}Sb16O$ molecule. It is concluded that $\mathrm{<mrow\; data-mjx-texclass="ORD">121</mrow>}Sb16O$ may be present in K type stars.