The central axis of the Moon's shadow cone misses Earth. However, a portion of the umbra or antumbra misses Earth throughout the eclipse and the resulting ground track has just one limit. The central axis of the Moon's shadow cone traverses Earth. The umbra or antumbra falls entirely upon Earth so the ground track has both a northern and southern limit. The central axis of the Moon's shadow cone traverses Earth thereby producing a central line in the eclipse track. These eclipses can be classified as central or non-central as: Total eclipses are visible from within the Moon's umbral shadow while annular eclipses are seen within the antumbral shadow. Hybrid eclipses are also known as annular-total eclipses. Hybrid - Moon's umbral and antumbral shadows traverse Earth (eclipse appears annular and total along different sections of its path).Total - Moon's umbral shadow traverses Earth (Moon is close enough to Earth to completely cover the Sun).Annular - Moon's antumbral shadow traverses Earth (Moon is too far from Earth to completely cover the Sun).Partial - Moon's penumbral shadow traverses Earth (umbral and antumbral shadows completely miss Earth).It is then possible for the Moon's penumbral, umbral or antumbral shadows to sweep across Earth's surface thereby producing an eclipse. Five Millennium Catalog of Solar Eclipses -1999 to +3000 (2000 BCE to 3000 CE) IntroductionĬan only occur when the Moon is near one of its two orbital nodes during the New Moon phase.
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