Jet of RY Tau from the H3 images tracing the [Fe  II] emission at 1.64 μm from the jet. Top panel: comparison of the jet radial extent between 2015 and 2017. The 2015 features identified in both images are replicated as dashed contours in the 2017 image. The arrows represent their apparent motion. The jet axis (PA = 293°) is indicated by the dashed line. The bright signal in the inner 1′′ is primarily stellar flux residual. Bottom panel: stellar light curve in the last 50 yr. The red line is the best fit to the 3100 blue datapoints. The calculated launch dates of the inner and outer jet spots are indicated by the black arrows, while the red arrows highlight the local photospheric maxima from the curve.