Eclipse magnitude is defined as the fraction or percentage of the Sun's diameter occulted by the Moon. It's usually expressed at greatest eclipse. Eclipse magnitude is strictly a ratio of diameters and should not be confused with eclipse obscuration which is a measure of the Sun's surface area occulted by the Moon.
 Delta_T is the difference between Terrestrial Dynamical Time and Universal Time
 Eclipse obscuration is defined as the fraction of the Sun's surface area occulted by the Moon.
 First contact is defined as the instant of external tangency between the Sun and Moon; it marks the beginning of the partial eclipse.
Second and third contacts define the two instants of internal tangency between the Sun and Moon; they signify the commencement and termination of the umbral (total or annular) phase.
Fourth contact is the instant of last external contact and it marks the end of the partial eclipse.
 P is defined as the contact angle measured counter-clockwise from the north point of the Sun's disk.
V is defined as the contact angle measured counter- clockwise from the zenith point of the Sun's disk.
 For partial eclipses, maximum eclipse is the instant when the greatest fraction of the Sun's diameter is occulted. For umbral eclipses (total or annular), maximum eclipse is the instant of mid- totality or mid-annularity.
 Gamma is measured in Earth radii and is the minimum distance of the Moon's shadow axis from Earth's center during an eclipse. This occurs at and defines the instant of greatest eclipse. Gamma takes on negative values when the shadow axis is south of the Earth's center.
 This figure is derived from data collected at selected intervals during the daylight hours. The chart is not directly comparable with Figures 9 to 11 because of national differences in data collection. However the patterns of heavy and light cloudiness are similar. <\body> <\html>