Sky and Telescope had a nice article on Delta Scorpii. In the summer time II spend a lot of time observing in the southern Milky Way and though that I should add this star to my observing list. I periodically make magnitude estimates for Alpha Orionis during the late winter early spring. The Sky and Telescope article recommends using Beta Scropii (Mag 2.6) and Antares 1.1) as comparison star. This is a pretty wide magnitude range. Is there a third star that falls between these two stars?