Abstrakt
Symbiotic stars are strongly interacting binaries, consisting of a white dwarf and a cool giant, mainly of spectral type M. AG Draconis belongs to a less common group of yellow symbiotic systems, as the cool component in this binary is of a spectral type earlier than K4.
Recently, after seven years of quiescence, this symbiotic star exhibited a very unusual active stage with several minor outbursts observed. Thanks to the excellent involvement of amateur astronomers and professional observatories, we can study the activity of AG Draconis in unprecedented details.
In the present work, we discuss the activity and peculiarities of this system within the entire group of symbiotic stars whose properties have recently been presented in our New Online Database of Symbiotic Variables.