Alpha Aquarii (Sadalmelik) - A giant star with a diameter perhaps 100 times that of the Sun. It is located 760 light years from Earth and shines at magnitude 2.95. Beta Aquarii (Sadalsund) - The...
Usually, but not always, it's called "alpha" + the Latin genitive form of the constellation's name. If you don't know Latin, figuring out how to form the genitive is a little tricky, so you should...