Possible positions of asteroid (506074) Svarog on 06:00:00 1 March 1990 on the orbit constructed from observations made during the first 3 months following its discovery. The purple box is the photographic plate. The orange dot is the nominal position. The blue dots are the 50 virtual asteroids, and the lines connecting them are the uncertainty regions of each VA (they are very narrow). The red dot is the actual observation. The green line is the uncertainty region of the nominal position constructed from only the covariance matrix in right ascension and declination.