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The BO V star, Columbae, appears to move in the direction away from the Orion association, with the same speed, 127 km/sec, as the 09.5 V star, AE Aurigae, discussed by the authors in a previous paper. The motions of the two stars are, moreover, almost exactly opposite. The observational data suggest that the stars were formed in the same physical process 2.6 million years ago and that this took place in the neighborhood of the Odon Nebula.
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Blaauw et al. (1954) studied this question.
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