Magnitude of Eclipse

Magnitude Of Eclipse

The magnitude of an eclipse is the fraction of the diameter of the eclipsed body which is in eclipse. This applies to both solar eclipses and lunar eclipses. During a partial or annular eclipse the magnitude of the eclipse is always between 0.0 and 1.0, while during a total eclipse the magnitude is always at least 1.0.

Technically, the magnitude is computed as such: draw a straight line between the centers of the eclipsed body and the eclipsing body (or shadow). Find out how large a fraction of this line within the eclipsed body is in eclipse; this is the geometric magnitude of the eclipse. If the eclipse is total, one can extend this line in one direction to the nearest limb of the eclipsing body (or shadow) and obtain a geometric magnitude larger than 1.0. If there is no eclipse but a near miss, one can also extend the line towards the nearest limb of the eclipsing body (or shadow), counting this distance as negative, and obtain a negative geometric magnitude.

This measure should not be confused with the astronomical magnitude logarithmic scale of brightness. It should neither be confused with the obscuration of the eclipse, which is the fractional area which is eclipsed.

Read more about Magnitude Of Eclipse:  Effect of The Magnitude On A Solar Eclipse, Effect of The Magnitude On A Lunar Eclipse

Other articles related to "magnitude of eclipse, eclipse":

Magnitude Of Eclipse - Effect of The Magnitude On A Lunar Eclipse
... The effect on a lunar eclipse is quite similar, with a few differences ... eclipsed body is the Moon and the eclipsing 'body' is the Earth's shadow during a lunar eclipse ... larger than the Moon, a lunar eclipse can never be annular but is always partial or total ...

Famous quotes containing the words magnitude of, eclipse and/or magnitude:

    Although a man may lose a sense of his own importance when he is a mere unit among a busy throng, all utterly regardless of him, it by no means follows that he can dispossess himself, with equal facility, of a very strong sense of the importance and magnitude of his cares.
    Charles Dickens (1812–1870)

    He who does something at the head of one Regiment, will eclipse him who does nothing at the head of a hundred.
    Abraham Lincoln (1809–1865)

    Constancy has nothing virtuous in itself, independently of the pleasure it confers, and partakes of the temporizing spirit of vice in proportion as it endures tamely moral defects of magnitude in the object of its indiscreet choice.
    Percy Bysshe Shelley (1792–1822)