Mid-eclipse estimates

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Hugh Allen

Hi Robin,

That’s a very convincing B-V curve – so the photometric and spectroscopic eclipse mid-points are in good agreement, like they were also in the two studies I cited in my paper from the late 1997-98 eclipse. Could some variability in the red supergiant be a factor in the changes in the eclipse measurements? It’s hard to understand and makes the next eclipse in 2038 an event to be anticipated!