Partial Lunar Eclipse November 18-19th

The eclipse begins on November 18th at 11:02PM MST when the Penumbra part of the Earth’s shadow touches the edge of the Moon. The Moon’s brightness at this point is -12.5. The Penumbra will continue covering the surface of the Moon until the Ulmba part of the Earth’s shadow touches the Moon’s edge on November 19th at 00:17AM MST. The Moon’s brightness is now down to -0.01.

Maximum Eclipse: The Ulmba will continue to cover the Moon’s surface until only a little crescent part of the Moon is not covered.

The time is approximately 2:02AM November 19th. The Moon will have a reddish color and its brightness is down to 0.97.

Eclipse ends: The Moon emerges from the Earth’s Ulmba at 03:46AM November 19th, its brightness is now 0. At 05:03AM the Moon emerges from the earth’s Penumbra at brightness -12.5, ending the Partial Lunar Eclipse. The duration of this Lunar Eclipse is 6 hours and 2 minutes.

NOTE: as a reference, the brightness of stars in the Big Dipper have a brightness of 1. The higher the number the dimmer the brightness.

For more information contact The Cottontail Observatory at (406) 842-7722, visit the website http://www.cottontailobservatory.com, or come to the Mining City Astronomers at the Main Library in Butte, on November 18th at 5:30PM to 7PM.