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Acrux is a similar double to Rigel Kent and near enough to make a quick and easy comparison, but the Acrux double is slightly closer again. I recall plenty of nights of imperfect seeing when you could get the split in Rigel Kent but Alpha Crux was more of a "broad smear" with no precise split. In good seeing it's easy and clean to split in a 10" and worth a look.
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