The Beaver Moon partial lunar eclipse on Nov. 19 will be the longest of the century.
The next eclipse of the moon will greet early risers before dawn on Friday morning (Nov. 19) across North America.
It will be the second lunar eclipse of 2021 and, in some ways, will be similar to the last one on May 26. Most North Americans will again need to get up early and look low in the west toward daybreak. And again, the farther west you are the better, as the moon will appear much higher from the western part of the continent as opposed to locations farther to the east. It will also be the longest partial lunar eclipse in 580 years, lasting just over 6 hours, with its pass through the darkest part of Earth's shadow taking about 3 hours, 28 minutes and 23 seconds, and also the longest this century.
But in another way, it will be different. This lunar eclipse will fall just shy of being total; 97.4% of the moon's diameter will become immersed in the Earth's dark umbral shadow at maximum eclipse, leaving just the southernmost limb ever-so-slightly beyond the outer edge of the umbra.
link :
https://www.space.com/beaver-moon-lunar-eclipse-longest-of-century-phases North American eclipse times:
This eclipse will occur in five phases, with different things to watch for at each.
Phase 1: "Moon enters penumbra" is when the moon's leading edge enters the pale outer fringe of Earth's shadow: the penumbra. But the shadow is so weak that most people won't see anything of the penumbra until about 70% of the moon's diameter is inside of it. Watch for a slight darkening to become apparent on the moon's celestial southeast (lower left) side. The penumbral shading gradually becomes more evident as the moon moves deeper in.
Phase 2: "Moon enters umbra" marks the beginning of the partial eclipse. This will be a much more obvious and dramatic sight as the moon's leading-edge slips into the umbra, where no direct sunlight reaches. With a telescope, watch as the umbra's edge engulfs various lunar features such as craters, mountains and valleys.
And as the moon wanes to a crescent, be sure to take a look around the sky. Before the eclipse began, the sky was bright; the moon acting like a spotlight obliterating all but the brightest stars. But as the moon becomes more and more diminished, you'll begin seeing more and more of the fainter stars. At maximum eclipse, the moon could appear nearly
10,000 times dimmer than before the eclipse began. One object that will certainly stand out during the darkest phase of the eclipse will be the famous Pleiades star cluster which will be positioned about a half dozen degrees above and slightly to the right of the moon.
Phase 3: "Maximum eclipse" will be when just a final bright arc remains on the moon's lower rim, while the rest of the moon is showing a foreboding reddish glow. This ruddy coloration shining onto the moon is sunlight that has skimmed and bent through the Earth's atmosphere; the combined light of all the sunrises and sunsets that ring our world at this particular moment. If an astronaut were on the lunar surface. He or she would see the sun hidden behind a dark Earth ringed with a thin, brilliant band of reddish or orange-yellow light. If our hypothetical astronaut were located on the moon's southernmost regions, however, a narrow edge of the sun would be evident along the dark edge of the Earth. At this time, 97.4% of the moon will be immersed in the Earth's dark shadow.
Phase 4: "Moon leaves umbra." After the partial eclipse attains its maximum and as the moon continues eastward along its orbit, events replay in reverse sequence.
Phase 5: "Moon leaves penumbra." When the last scallop of the Earth's umbra exits the moon's disk, only the last, penumbral shading is left. By about 25 minutes later, nothing unusual remains at all and our November full moon appears as bright as ever.
