| 词条 | July 2018 lunar eclipse | |||||||||||||||||||||||||
| 释义 |
| type = total | image = Lunar Total Eclipse on July 27, 2018 (100 2006) (43696968392) (cropped).jpg | caption = Oria, Italy, 21:09 UTC, end of totality | date = 27 July 2018 | gamma = +0.1168 | magnitude = 1.6087 | saros_ser = 129 | saros_no = 38 of 71 | totality = 102 minutes, 57 seconds | partiality = 234 minutes, 32 seconds | penumbral = 373 minutes, 48 seconds | p1 = 17:14:49 | u1 = 18:24:27 | u2 = 19:30:15 | greatest = 20:21:44 | u3 = 21:13:12 | u4 = 22:19:00 | p4 = 23:28:39 | previous = January 2018 | next = January 2019 }} A total lunar eclipse occurred on Friday, 27 July 2018. The Moon passed through the center of Earth's shadow in what was the first central lunar eclipse since 15 June 2011. It was also the second total lunar eclipse in 2018, after the one on 31 January. The eclipse occurred when the Moon was near its maximum distance from Earth, which caused the Moon to appear smaller than normal (a phenomenon sometimes called a micromoon),[1][2] and to travel at its slowest speed in its orbit around Earth.[3] This was the longest total lunar eclipse that will occur in the 21st century.[3] Totality lasted approximately one hour and 43 minutes,[4][5][6][7] a period "just short of the theoretical limit of a lunar eclipse (one hour and 47 minutes)".[8] The Moon remained at least partially in Earth's shadow for four hours.[8] This lunar eclipse coincided with Mars being nearly as close as possible to Earth, a concurrence that happens once every 25,000 years.[6] Background{{main|Lunar eclipse}}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 Earth's shadow begins to cover part of the Moon, typically turning it a dark red-brown color (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 daytime sky to appear blue) and the refraction of that light by Earth's atmosphere into its umbra.[9] The Moon's brightness is exaggerated within the umbral shadow.[9] The southern portion of the Moon was closest to the center of the shadow, making it the darkest, and most red in appearance.{{Citation needed|date=July 2018}} VisibilityThe lunar eclipse was completely visible over Eastern Africa, Southern Africa, Southern Asia and Central Asia, seen rising over South America, Western Africa, and Europe, and setting over Eastern Asia, and Australia.[10]
MapObservationsRelated eclipsesLunar year series{{Lunar eclipse set 2016-2020}}Saros series{{Saros 129 summary}}This is the 38th member of Lunar Saros 129. The previous event was the July 2000 lunar eclipse. The next event is the August 2036 lunar eclipse. Lunar Saros 129 contains 11 total lunar eclipses between 1910 and 2090. Solar Saros 136 interleaves with this lunar saros with an event occurring every 9 years 5 days alternating between each saros series. Half-Saros cycleA lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[11] This lunar eclipse is related to two total solar eclipses of Solar Saros 136.
See also
Notes1. ^{{Cite web|url=http://www.timeanddate.com/astronomy/moon/micro-moon.html |title=What Is a Micromoon?|website=Timeanddate.com |date=n.d.|publisher=Time and Date AS |location=Stavanger, Norway|access-date=August 6, 2018}} 2. ^{{cite web|url=https://www.businessinsider.sg/how-lunar-eclipses-work-earth-moon-red-shadow-2018-7/|title=The longest total lunar eclipse in a century is about to happen — here's how Earth will color the moon blood-red|first1=Dave|last1=Mosher|first2=Shayanne|last2=Gal|website=Business Insider|date=26 July 2018|access-date=1 August 2018}} 3. ^1 {{cite web|url=http://earthsky.org/tonight/centurys-longest-lunar-eclipse-july-27|title=Century's Longest Lunar Eclipse July 27|first=Bruce|last=McClure|date=27 July 2018|website=EarthSky|access-date=1 August 2018}} 4. ^{{cite web|url=http://earth-chronicles.com/space/in-2018-the-longest-lunar-eclipse-will-take-place-in-100-years.html|author=Space|title=In 2018 the longest lunar eclipse will take place in 100 years|date=29 December 2017|website=Earth Chronicles|access-date=1 August 2018}} 5. ^{{cite news|url=https://www.vox.com/science-and-health/2018/7/27/17621694/watch-lunar-eclipse-july-2018-blood-moon-live-stream-start-time|first=Brian|last=Resnick|title=Watch: The longest 'blood moon' lunar eclipse of the century|work=Vox|date=27 July 2018|access-date=1 August 2018}} 6. ^1 {{cite news|url=http://www.windermeresun.com/2018/07/27/centurys-longest-lunar-eclipse-blood-moon-2018-today-will-last-103-minutes/|title=Century’s Longest Lunar Eclipse, Blood Moon 2018, Today, Will Last 103 Minutes|website=Windermere Sun|date=27 July 2018|first=Susan Sun|last=Nunamaker|access-date=1 August 2018}} 7. ^{{cite web|url=http://tass.ru/kosmos/5405760|title=Два редких астрономических явления можно будет наблюдать 27 июля|website=TASS|language=Russian|date=26 July 2018|access-date=1 August 2018}} 8. ^1 {{cite web|url=https://www.theguardian.com/science/2018/jul/25/blood-moon-all-you-need-to-know-about-this-weeks-lunar-eclipse|title=Blood moon: All you need to know about this week's lunar eclipse|last=Lyons|first=Kate|date=25 July 2018|website=The Guardian|access-date=1 August 2018}} 9. ^1 {{cite web|title=Visual Appearance of Lunar Eclipses|website=NASA Eclipse Web Site|publisher=National Aeronautics and Space Administration|first1=Fred|last1=Espenak|first2=Jean|last2=Meeus|url=http://eclipse.gsfc.nasa.gov/LEcat5/appearance.html|date=29 January 2009|access-date=2 August 2018}} 10. ^{{cite web|url=https://www.timeanddate.com/eclipse/map/2018-july-27|title=Eclipse Map — 27 July 2018 Total Lunar Eclipse|language=English}} 11. ^Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros External links{{commonscat|Lunar eclipse of 2018 July 27}}
4 : 21st-century lunar eclipses|Central total lunar eclipses|2018 in science|July 2018 events |
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