![]() Measured from the point on the Sun that has the highest local altitude.ĭuration is the amount of time from the beginning of the eclipse to theĭuration of Totality is the amount of time from the beginning of theĬentral phase eclipse to the end of the central phase. Vertex Angle is similar to Position Angle, except that it is Measured eastward (counterclockwise) around the solar limb, from the point on the The Position Angle of a given contact point on the solar limb is The time of sunrise or sunset is also noted in the table if it Topocentric position at that time, and its Position and VertexĪngles. The body of the table contains the time of each contact point, the Sun's ![]() Lunar limb profiles and center of mass/center of figure corrections are not used.Īfter contact times have been computed, a check is made to determine if SunriseĪnd/or Sunset occurred during the course of the eclipse. In just 4 years, on April 8, 2024, a total solar eclipse will cross the United States, and at some point, you will read an article that states something like a spot on the Earth will witness a. Solar and lunar angular diameters are calculated at each position using radius values adopted by the International Astronomical Union (Sun 696000 km Moon 1737.4 km) to determine if contact conditions Topocentric positions of the Sun and Moon to find the time of Maximum Eclipse.Īnother series of position computations is performed going backwards andįorwards from the time of Maximum Eclipse to find the times of contacts. The computation of Eclipse Local Circumstances is started by iteratively computing On April 8, 2024, well be experiencing a phenomenon-The Great North American Solar Eclipse Viewing a total solar eclipse is a. The altitude is corrected forĪssuming standard atmospheric conditions. ![]() The azimuth is reckoned eastward from North. Of the Sun at each of the events is given as well. The table of local circumstances gives the UT1 time of each eclipse "event"
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