Graphics of Asteroid occultation observations. March 2008. These plots of the occultation observations have a filename convention concatenating the asteroid number, asteroid name or provisional designation, and occultation date. The heading for each plot gives the following information: Line 1 Object identification, event date, ellipse size and orientation, and associated uncertainties. Line 2 The offset of the shadow from the center of the earth, and associated uncertainty values. Line 3 [Only when a double star is involved.] The separation and Position angle of the components of the double star, with associated uncertainty. Important. In all lines, an uncertainty value is only given if there has been a meaningful calculation of the particular quantity. Where there is no uncertainty value, usually the particular value has been assumed. The coding used in the plots is as follows: Event type * Disappearance events are plotted in Red. * Reappearance events are plotted in Green * Miss events are plotted in grey. * For some events, the predicted central path is plotted. This is drawn using a purple dashed line. Observing method * Events recorded visually are plotted with a '+' * Video/CCD observations are plotted with a small square. * Miss events are plotted with a 'x'. Plot style The plot is drawn in a manner that depends on the detail that is derived from the observations. * For the best-observed events, the observations are drawn without any best-fit ellipse, or joining pairs of observations. This better enables the irregulaities in the asteroid profile to be visible. * For well-observed events, a best-fit ellipse is drawn through the observations. The ellipse illustrates the shape of the asteroid. * For poorly-observed events, a gray line joins the events of each observer. That is, it shows the time during which the star was invisible to the observer. Double stars. For a small number of events, a double star is involved. When this occurs, the plot includes a representation of the double star, drawn on the same projected scale as the plot of the asteroid.