January 2018 lunar eclipse

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Total lunar eclipse
January 31, 2018
Ecliptic north up
Lunar eclipse chart close-2018Jan31.png
The moon will pass west to east (right to left) through the Earth's shadow.
Saros (and member) 124 (49 of 74)
Gamma -0.3014
Duration (hr:mn:sc)
Totality 1:16:04
Partial 3:22:44
Penumbral 5:17:12
Contacts (UTC)
P1 10:51:15
U1 11:48:27
U2 12:51:47
Greatest 13:29:50
U3 14:07:51
U4 15:11:11
P4 16:08:27

A total lunar eclipse will take place on January 31, 2018.


It will be visible over north-western North America, the Pacific, Asia, and Australia.

Lunar eclipse from moon-2018Jan31.png
View of earth from moon during greatest eclipse
Visibility Lunar Eclipse 2018-01-31.png
Visibility map


A lunar eclipse occurs when the Moon passes within Earth's umbra (shadow). As the eclipse begins, Earth's shadow first darkens the Moon slightly. Then, the shadow begins to "cover" part of the Moon, turning it a dark red-brown color (typically – the color can vary based on atmospheric conditions). The Moon appears to be reddish because of Rayleigh scattering (the same effect that causes sunsets to appear reddish) and the refraction of that light by Earth's atmosphere into its umbra.[1]

The following simulation shows the approximate appearance of the Moon passing through Earth's shadow. The Moon's brightness is exaggerated within the umbral shadow. The northern portion of the Moon was closest to the center of the shadow, making it darkest, and most red in appearance.

Animation January 18 2018 lunar eclipse appearance.gif

Related eclipses[edit]

Lunar year series[edit]

Saros series[edit]

It is part of Saros cycle 124.

See also[edit]


  1. ^ Fred Espenak & Jean Meeus. "Visual Appearance of Lunar Eclipses". NASA. Retrieved April 13, 2014. 

External links[edit]