| 31. | The secondary is a white main sequence star of spectral type A3V and magnitude 6.57.
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| 32. | From the colour and brightness, it is expected to be a hot main sequence star.
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| 33. | Zeta Gem B appears as an F4 main sequence star and is a spectroscopic binary.
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| 34. | Yellow supergiants are rare stars, much less common than red supergiants and main sequence stars.
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| 35. | PP Carinae is a B-type main sequence star with a stellar classification of B4 Vne.
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| 36. | When orange main sequence stars leave main sequence do they go to a red giant?
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| 37. | HD 93129 Aa is an O2 supergiant and Ab is an O3.5 main sequence star.
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| 38. | It may still be hydrogen burning main sequence star.
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| 39. | These stars are also not like the Sun because they are not main sequence stars.
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| 40. | Both component stars are detached main sequence stars which do not fill their Roche lobes.
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