Relative intensity images of the comet C/2018 DO4 (Lemmon) in the B, V, R, and I filters obtained on October 02, 2019, at CrAO. (a) Direct images of the comet with the isophots differing by a factor . (b) Image processed by a rotational gradient method (Larson & Sekanina 1984). (c) and (d) Images to which the azimuthal average and the division by 1/ρ profile methods were applied, respectively (Samarasinha & Larson 2014). The arrows show the direction to the Sun (⊙), north (N), east (E), and the negative velocity vector of the comet projected onto the sky plane (V). Negative distance is in the solar direction.