| 词条 | December 2009 lunar eclipse | ||||||||||||||||||||||||||||||||||||||||
| 释义 |
A partial lunar eclipse was visible on New Year's Eve, Thursday, December 31, 2009. It was the last and largest of four minor lunar eclipses in 2009. This lunar eclipse is also notable, because it occurred during a blue moon (a second full moon in December). The next eclipse on New Year's Eve and blue moon will occur on December 31, 2028. Only a small portion of the Moon entered the Earth's umbral shadow, but there was a distinct darkening visible over the Moon's southern surface at greatest eclipse. VisibilityIt was visible from all of Africa, Europe, Asia, Middle East and Australia. In the Philippines, the lunar eclipse was started last January 1, 2010, when it was very visible at mid-dawn until before sunrise.
MapPhotosAsia
EuropeRelated eclipsesLunar year (354 days)This eclipse is the one of four lunar eclipses in a short-lived series. The lunar year series repeats after 12 lunations or 354 days (Shifting back about 10 days in sequential years). Because of the date shift, the Earth's shadow will be about 11 degrees west in sequential events. {{Lunar eclipse set 2009-2013}}Half-Saros cycleA lunar eclipse will be preceded and followed by solar eclipses by 9 years and 5.5 days (a half saros).[1] This lunar eclipse is related to two partial solar eclipses of Solar Saros 122.
See also
References1. ^Mathematical Astronomy Morsels, Jean Meeus, p.110, Chapter 18, The half-saros External links
3 : 21st-century lunar eclipses|2009 in science|December 2009 events |
||||||||||||||||||||||||||||||||||||||||
| 随便看 |
|
||||||||||||||||||||||||||||||||||||||||
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。