Gemini meteor shower (Geminids, 004GEM) it is year 3 fireball group last groups, active date is during 12/4-12/17. Forecast great this year period happened on December 14 night, beforehand appraise ZHR can be amounted to make an appointment with 140 hourly, see all night. Do not cross Feng Yueling of phase of the moon the deficient protruding month of 17.9, because the moon is full evening is visible, the meteoric amount that can see below moon influence will decrease considerably, likely a remnant 20 come just.
Year old meteor shower of Gemini of end pressing axis, performed in moon on December 14! Above sketch map arises by Stellarium software.
Appreciation meteor shower does not require the special equipment such as binoculars, also not the tourist attraction with specific be confined to, should choose eye shot only open, light kills as less as air pollution place to be viewed and admire with naked eye can, want to notice the way of escape moon nevertheless, ability reduces his to affect. The place that suits to enjoy a bit the high mountain with 2000 meters above is normally optimal, rustic region take second place, and the city is killed circumjacently solely as serious as air pollution, do not suit.
Graphic: The shooting star of Gemini meteor shower (left below) with comet [Holmes comet
Gemini meteor shower not only meteoric number is much and stable, rank year so 3 fireball group one of. The origin of meteor shower is comet remain commonly what go up in orbit is residual, but this group is the meteor shower that origin of a flock of meteoroid be affirminged are minor planet however. Astronomer thinks this group of meteor shower come from the 3200th asteroid (3200 Phaethon) , radiation nods a boreal river in Gemini head 2 around, characteristic of its shooting star is speed medium slant slow (make an appointment with every second 35 kilometers) , brightness is medium slant bright, can appear now and then brighter bolide, and meteoric most presents color; After nevertheless the shooting star has delimited leave superabundant mark less, this is nodded and the Perseus meteor shower of the middle ten days of a month is different in August.
Gemini meteor shower is origin of a flock of meteoroid be affirminged are the meteor shower of minor planet.
General meteor shower is some comet makes because of be close to the sun its surface material evaporates normally, stay on orbit and cause; But the source that Gemini sorts asterism is the 3200th minor planet law however be stranded is the same as (3200 Phaethon, interpret poors with eulogy) be bumped or tide action and a large number of fragments of generation, this is the incident that astronomy bound first time confirms to minor planet and meteor shower are concerned.
Law be stranded makes an appointment with 5.1 kilometers with the diameter, belong to " Apollo " close ground asteroid, namely orbit can pass through the earthly orbit, asteroid that can be close to the earth very much sometimes, reason also is by classify at present " the close ground asteroid that has potential menace to the earth (PHA) " one of. It circles sun revolution circuit to need 1.4 years about, orbit is very elliptical, aphelion is near 2.4 astronomical unit (between spark and Jupiter) , but 0.14 astronomical unit are briefed only when perihelion is close to the sun most, still get nearly than mercurial 0.4 astronomical unit much, it is the asteroid that at present foregone perihelion is close to the sun most, reason Phaethon comes from its name in Greek mythology story, extortionary drive sun carriage and of the Baal Apollo that wreck dies child Pha? Ton.
Relevant knowledge is outspread read
Gemini meteor shower is (the meteor shower that 3200) law be stranded causes with minor planet, this asteroid is considered as wisdom god the asteroid of astral a group of things with common features, having the track of " of " rock comet. It and quadrant meteor shower is minority (know these two only at present) not be the meteor shower that causes by comet. The meteoric peak value of this meteor shower appeared in December normally near 13-14 day, highest intensity appears in the 2:0 of 14 days of before dawn normally0-03:00 (when the place) . The amount of this meteor shower is in the appearance that in last few years year after year increases, once was as high as horary 120-160 below first-rate optics condition shooting star. Gemini meteor shower is in 1862 first degrees by observation, and in have Perseus meteor shower already more (36AD) with Leo meteor shower (902AD) observation record.
Graphic: The Gemini meteor shower that saw in san Francisco 2009.
The shooting star of this meteor shower looks be like come from the radiation dot inside Gemini, be called consequently Gemini meteor shower. However, these shooting stars can appear in in the sky of night any place, and often appear flaxen tonal. In equator with north, radiation dot rises from horizon when sunset about case, the evening that is in place is made one hour reach the height that suits observation; In the Southern Hemisphere, radiation dot appears on horizon in midnight around only. The radiation dot height that sees in the observer of the Northern Hemisphere is taller, the meteoric amount of seeing Gemini meteor shower also can be jumped over much. The speed photograph of these shooting stars relatively it is at other meteor shower medium, it is 35 kilometre hourly about (22 miles) , because this is very easy,be seen. Gemini meteor shower is considered as year now in most stability and active meteor shower, the shooting star of this group of meteor shower is in about 38 kilometre (24 miles) high place is met disintegrate.
Graphic: The dimension accept observatory that used Suo Nuo on December 25, 2010 37 centimeter, the Gaisaigelin of F14 is telescopic matrix of observed Gemini meteor shower, (What 3200) law be stranded is the same as minor planet is video. (MPC 857)
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