[en] Direct mass measurements of A=80 isobars were performed using the second cyclotron of SARA (systeme accelerateur rhone-alpes) of the ISN (institut des sciences nucleaires) in Grenoble as a time-of-flight mass spectrometer. Using the 300 MeV ⁵⁸Ni+²⁷Al reaction, the isobars ⁸⁰Rb,⁸⁰Sr,⁸⁰Y, and ⁸⁰Zr (only one event.) were measured. For ⁸⁰Y we found a mass value of 79.934320(180) u, corresponding to a decay energy Q (⁸⁰Y→⁸⁰Sr) of (9120± 170) keV. Comparing this value to the former experiments of Lister et al. and Della Negra et al. results in a difference of about 2.2 MeV. However, it does agree with the recommended value of Audi and Wapstra, which is derived from systematic trends. For ⁸⁰Zr the single event was identified with a probability of 0.999975 and a mass value of 79.940400(1600) u could be deduced from our experiment. (orig.)