2015 was a great year, for the Siena University Observatory team (A. Marchini, Riccardo Papini and F. Salvaggio), often with the help of other Italian amateur observatories, including Avogadro, for its programs of discovery new variable stars. The adverse weather conditions across the Italian peninsula at the time of the discovery, however, were about to make the Siena team to give up, despite the fact that they already found a rough ephemeris for this variable, which is located in the constellation of Taurus and is a beautiful EA system. But here comes into the game Avogadro Observatory. During the night of December 9 we, Avogadro managed to capture – among a lot vicissitudes due to clouding variability – the decisive minimum. The GSC 01826-00950 is an Eclipsing variable of Algol (Beta Persei) type, composed of a couple of spherical or slightly ellipsoidal stars that orbit each other with a calculated period of about 3.10 days is the light curve obtained with the Avogadro Observatory data:
The system magnitude ranges from 13.72 to 13.98 (CV). The secondary minimum, not observed but obtained by the Catalina Real-Time Transient Survey (CRTS) is about 0.12 magnitudes below the maximum.
This war another wonderful result the testifies haw much productive is the collaboration among several observatories.