Eclipse Seasons - The times, separated by about 5 1/2 months, when eclipses of the Sun and Moon are possible
Eclipse Track - The path of the Moon's shadow across the Earth during a solar eclipse ...
The result is that the eclipse seasons gradually progress backward through the calendar, occurring about 20 days earlier each year and taking 18.6 years to make one complete circuit. This phenomenon is known as the regression of the line of nodes.
It is only when these "eclipse seasons" match up with the date of a new moon that solar eclipses occur. Since this will occur at 1:20 EST, the Sun will be about 20 degrees west of south during the eclipse.
 See also: Solar, Solar radiation, Earth, Total Eclipse, Eclipse
  
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