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Spectroscopic Observation of BE Star - 4 Hercules

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4 Hercules is a mag 5.75 star which is a known BE star with an edge on circumstellar disk. I made a spectroscopic observation of this star last night 20/21 April. I have written up a little report including the method used to calculate the rotational velocity of the circumstellar disk.



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Very nice work Dave. I am impressed :0)

What do you think is the error in your measurement?

By the way I disagree with Ken too but on more deep seated religious grounds. I believe the soul of the star is at the centre of the star. But we only see the light from the photosphere so we never see the soul of the star itself ;0)



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