V1719 Aql: A solar-type twin binary

Stellar parameters of the solar type twin binary V1719 Aql have been derived with relatively high accuracy. The erroneous known orbital period was corrected. The true period of the system (P = 4.35 days) is twice the value known in the literature. The system is located at 77 +/- 3 pc from the Sun, which matches, within the uncertainty box, the distance of 76 +/- 1 pc given by the GALA mission. The system consists of two G5V-type components with similar masses, radii and temperatures, respectively. The orbit is circular and the components rotate faster (25 kms(-1)) than their orbital synchronization velocity (10 kms(-1)). The number of G-type twins increases as predicted by the recent studies.