Splendid coverage of the LTVs in V, B, and U of HD 179821, between 1990 and 2009 (based on observations by Arkhipova et al. 2001, 2009; Le Coroller et al. 2003; Hrivnak 2001). We note that dips and bumps in V, B, and U do not vary in concert. It appears that the LTVs in JK of Arkhipova et al. (2009) and Hrivnak et al. (1989) (see Fig. 9 in Arkhipova et al. 2009) mainly mimic the V trend, and more or less the bumps and dips between JD 24 49000 and JD 24 50500. We witness here the presumable evolution of HD 179821 along a blue loop in the direction of the Yellow Void (just like HR 8752 did after 1990) ending around JD 24 53000 (2004), after which HD 179821 moved back on a red loop, see text; see Fig. 10.