The spectral luminosity class is of a bright supergiant, indicating the rarefied nature of its atmosphere and low surface gravity.
22.
Although it is given a supergiant luminosity class, it is effectively a main sequence star still burning hydrogen in its core.
23.
There is an MKK luminosity class 0 ( zero ) for hypergiants, but this is rarely seen in published spectral classifications.
24.
The giant phase for such stars is a brief phase of slightly increased size and luminosity before developing a supergiant spectral luminosity class.
25.
It is an asymptotic giant branch star of spectral type M6S, with a luminosity class of Ib, indicating a supergiant luminosity.
26.
Alpha Leporis has a stellar classification of F0 Ib, with the Ib luminosity class indicating that it is a lower luminosity supergiant star.
27.
The stellar classification of this star is K3 IIIa, where the luminosity class of III indicates that this is an evolved giant star.
28.
The spectrum of ? Aql A matches a stellar classification of F3, with the luminosity class of Ib indicating this is a supergiant.
29.
Synthetic spectra indicate that it would never have a main sequence luminosity class ( V ), or even a normal O type spectrum.
30.
Classical Cepheid variables typically have supergiant luminosity classes, although only the most luminous and massive will actually go on to develop an iron core.
