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Published online by Cambridge University Press: 12 April 2016
The M2 II star HR 3126 (HD 65750) is remarkable because it sits near the center of a 0.7M⊙ butterfly-shaped reflection nebula of several arc minutes extent (Dachs et al. 1978, A & A 63, 353.). If it is a member of the nearby open cluster NGC 2516, the distance (375 pc), main sequence turnoff age (~ 108 years) and implied mass (~ 5Mʘ) suggest that IIR 3126 is a red bright giant past the initiation of helium burning in its core.