Observations of 2020 MK₄. Left panel: image of 2020 MK₄ obtained on July 17, 2020 with the JKT telescope. This image is a combination of 93 images (exposure time of 90 s each), realigned so 2020 MK₄ was lined up.The field is 68′′ × 68′′; north is up,and east is to the left. Right panel: image combined on the comet minus the same combination of images centered ona bright star. Both images were sky subtracted and normalized to the peak before subtraction. It is important to notice that there is a circular residual compatible with the presence of a compact faint coma around 2020 MK₄. In this case, the field of view is 34′′ × 34′′. The coma has a diameter of about 4.′′1 or 15 500 km at the geocentric distance indicated in Table 2.