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We present an analysis of the optical observations of Herbig AeBe star V1686Cyg, which is associated with a small isolated star-forming region around HAeBestar BD+40$^{\circ}$4124. We observed this star as a part of our project ofyoung eruptive stars investigation. Observations were held on 2.6m telescope ofByurakan Observatory from 2015 to 2017. For this period we obtained V1686 Cygdirect images and 14 medium- and low-resolution spectra. In the course ofobservations we noticed that this star underwent a not-typical brightnessoutburst. After data reduction we found that the full rise and decline of V1686Cyg brightness had almost 3 magnitudes amplitude and lasted about 3 months. Wewere also able to trace the changes of the stellar spectrum during theoutburst, which are correlated with the photometric variations.

Simultaneous photometric and spectral analysis of a new outburst of V1686 Cyg