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Spectroscopically its a red giant. No doubt about it. The temperature matches the spectral lines for this type of star. There is nothing to indicate an mystery there.
Smoke and dust affect the colour of transmitted light due to their colour more than anything. Bushfire smoke is often brown, dust off red soil is of course red. Most of the blue scattering we obseve is due to nitrogen in the atmosphere. That is why you don't need dust or smoke in the air to get a red sunset (but of course they will help to make it spectacular).
Al.
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