| 1. | Stars of luminosity class V belonged to the main sequence.
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| 2. | Bright giant luminosity classes are not defined for stars hotter than O6.
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| 3. | These stars may develop supergiant luminosity classes, especially if they are pulsating.
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| 4. | Old estimates based simply on the supergiant luminosity class gave much higher masses.
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| 5. | O class stars and stars cooler than K1 are rarely given subgiant luminosity classes.
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| 6. | Spectroscopically it is early F or late A with luminosity class Ia or Iab.
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| 7. | It is sensitive to the luminosity classes of G-K-M stars.
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| 8. | It has a spectral type of G5, while the luminosity class remains undetermined.
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| 9. | Such stars may be given a supergiant luminosity class due to their low masses and pulsation.
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| 10. | The spectral type for 21 Camelopardalis is given only as A5 with no published luminosity class.
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