page_title: Magnitude of eclipse
hierarchical_section_title: Magnitude of eclipse
caption_attribution_description: English: Annular phase of solar eclipse May 10 2013, viewed from Churchills Head north of Tennant Creek, Northern Territory, Australia
context_page_description: The magnitude of eclipse is the fraction of the angular diameter of a celestial body being eclipsed. This applies to all celestial eclipses. The magnitude of a partial or annular solar eclipse is always between 0.0 and 1.0, while the magnitude of a total solar eclipse is always greater than or equal to 1.0.
  The cycle of magnitude of eclipse is 141 years minus 1 month. The southern central eclipse alternates to northern or vice versa. Saros = number +3.
  This measure should not be confused with the covered fraction of the apparent area of the eclipsed body, whereas the magnitude of an eclipse is strictly a ratio of diameters. Neither should it be confused with the astronomical magnitude scale of apparent brightness.
context_section_description: The magnitude of eclipse is the fraction of the angular diameter of a celestial body being eclipsed. This applies to all celestial eclipses. The magnitude of a partial or annular solar eclipse is always between 0.0 and 1.0, while the magnitude of a total solar eclipse is always greater than or equal to 1.0.
  The cycle of magnitude of eclipse is 141 years minus 1 month. The southern central eclipse alternates to northern or vice versa. Saros = number +3.
  This measure should not be confused with the covered fraction of the apparent area (disk) of the eclipsed body, whereas the magnitude of an eclipse is strictly a ratio of diameters. Neither should it be confused with the astronomical magnitude scale of apparent brightness.
caption: An annular solar eclipse has a magnitude of less than 1.0
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