Viewpoint near Sanatorio de Alcohete

What the contact points (C1-C4) mean

A solar eclipse is described by four key moments, the contact points between the discs of the Sun and the Moon:

• C1First contact: the Moon touches the edge of the Sun and the partial eclipse begins.
• C2Second contact: the Moon fully covers the Sun and totality begins.
• C3Third contact: the Sun reappears and totality ends.
• C4Fourth contact: the Moon leaves the Sun's disc and the eclipse ends.

Where the eclipse is only partial, the Moon never fully covers the Sun: only C1 and C4 occur, with no totality in between.

Practical info

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Coordinates

40.5828, -3.1157