11/20/2023 0 Comments Umbra eclipse and a penumbral eclipse![]() From the moon, one would see the Earth touching the sun, and blocking its light. ![]() Second contact is called U1, and that's when the moon touches the Earth's umbra - this is the dark part of the Earth's shadow, and that's when one sees the moon get a "bite" taken out of it. If one were standing on the moon, at first contact one would see the Earth approaching the sun but not quite blocking it yet - you'd see the dark side of the Earth, though. The penumbra is the part of the shadow that is lighter and only discolors the moon somewhat (it generally looks brownish-gray, or tea-stained, but the exact hue depends a lot on atmospheric conditions on Earth and one's own color perception). (Image credit: Courtesy of Imelda Joson and Edwin Aguirre)Ī lunar eclipse consists of six stages, the start of which are called "contacts." First contact (marked as P1 on charts) is when the moon touches the penumbra of the Earth. From left to right: The start of totality, at 11:41 p.m. 20-21, 2019, captured by astrophotographers Imelda Joson and Edwin Aguirre from the suburbs of Boston. Dates are noted when they change if one phase of the eclipse occurs after local midnight. The table below lists several cities from which the entire umbral phase of the eclipse is visible, based on information from and NASA's eclipse page. AEST.įor observers in the United States, the only places where the entire eclipse is visible are in Hawaii or Alaska. The penumbral phase ends near midnight, at 11:52 p.m. At that point, the moon is 45 degrees above the horizon - well above most obstructions. Australian Eastern Standard Time and the moon is already about 18 degrees above the horizon. From Melbourne, the penumbral eclipse starts at 6:47 p.m. The eastern two-thirds of Australia will see the entire eclipse. and the moon will leave the umbra at 9:52 p.m. The moon will be in the total phase of the eclipse, completely red, at 8:11 p.m. At that point, the moon will be turning red and just peeking over the horizon. The moon will look slightly darker as the penumbral phase will have started already, and the moon touches the umbra at 6:44 p.m. Related: The stages of the Super Flower Blood Moon explained When is the Super Flower Blood Moon lunar eclipse?įrom Tokyo, one can see the entire umbral phase of the eclipse just after moonrise at 6:37 p.m. The moon does appear slightly larger when it is closer, but the difference is small, and it takes a very observant skywatcher to notice. When it reaches perigee this month, the moon will be 222,022 miles (357,311 km) from Earth, per calculations. ![]() Ordinarily the moon is an average of 240,000 miles (384,500 kilometers) from Earth, but its orbit isn't perfectly circular. When the full moon and perigee are close, it is called a " supermoon" - though definitions aren't consistent as it isn't an astronomical term. EDT (0121 May 26 GMT), some 14 hours after it is officially at full phase (which happens at 7:13 a.m. This lunar eclipse will appear slightly larger than normal because the moon will reach perigee, the closest point in its orbit to Earth, on May 25 at 9:21 p.m.
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