Danjon SCALE
During the eclipse the Moon has a degree of visibility known as the Danjon Scale.
0 = Very dark eclipse, the Moon is almost invisible.
1 = Eclipse, gray or brown. Eclipse
2 = dark red or rusty color, shadow edges clear. Eclipse
3 = brick red, or yellow light shade. Eclipse
4 = very clear, coppery red with blue trim.
eclipsed Moon can stay for 1 hour, 45 minutes maximum, then the Moon out of the shade with a small growing light, will widen to the left of limbo, until the shadow leaves the disk and then the darkness is lifted. The eclipse is over and can last about six hours.
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