virgo(virgo)Meteor shower

Meteor shower looks like the meteor burst and falling down from in the night sky, this or that a small piece of area called meteor shower's radiant point, usually named after the meteor shower constellations radiant point in the day to shower, to distinguish it from different directions of meteor shower, from the direction of the virgo to meteor shower is called virgo meteor shower.

Confirmed the first-class constellation is the first person of cannon, HuoFuMei stern (Cuno Hoffmeister).In his 1948 book "meteor night".He confirmed that a lot of activities between April 3 - probably the meteor shower, he call it a virgo composite meteor.He pointed out that the compound meteor altogether is composed of nine radiant point, and their great time is presented.

Although there are a lot of meteor shower between 3-4 month activity information is already known, but HuoFuMei, their radiant point is the first specialized research.Virgo theta meteor shower is one of the strongest team, based on 12 separate radiant point.He greatly on March 15 (sun longitude 355.7 degrees c), the radiant point located on the right ascension of 192.4 degrees, 1.5 degrees declination -.

　　Virgo in the history of the meteor shower

The first person to virgo theta system observation meteor shower is Robert gray (Robert P.G reg) and Alexander herschel (A.S.H erschel), in 1850-1867 on March 5 to 17 have observation records, radiant point in the right ascension of 190 degrees, + 1 degrees declination.Ronald macintyre assorted (Ronald arjun cIntosh) in his "nantian meteor shower index" mentioned in this meteor shower, what he called a "virgo 46", the activity time is March 19 to 31, radiant point location right ascension of 194 degrees, declination - 3 degrees.

Recently for virgo theta of the Meteor shower observation records from Western Australia Meteor association (Western Australian Meteor Section).In 1977, they observed on March 18 to 19 are meteors group activities.19, ZHR 3.17 + / - 2.24, radiant point in the right ascension of 196 degrees, degrees declination - 1.In 1979, they were observed in the March 16-31.20, ZHR 1.39 + / - 0.46, the average radiant point position is located in the right ascension of 196 degrees, degrees declination - 1.

Jersey, carney na (Zdenek Sekanina) in radio meteor plan two observation determine the orbit of the group.First observed in 1961-1965, the group is called "north virgo meteor shower", activity time is 9 March to April 5, holiday time is on March 20.6 days, radiant point in the right ascension of 201.6 degrees, 3.3 degrees declination -.Interestingly, Mr Carney second observed two group, basic similar orbit.The first group is called the "north virgo meteor shower", activity time on 10 March to April 17, holiday time is on March 16.4 days, radiant point is located in the right ascension of 196.0 degrees, 1.0 degrees declination -.The second group known as "south virgo meteor shower", the activity time is 10 March to April 21, for a little time for April 2.1, the average radiant point in the right ascension of 210.5 degrees, 8.4 degrees declination -.Gary crowe (Gary Kronk) chose 31 certainly is a member of the virgo theta meteor shower, measured, drift is + 0.90 degrees/right ascension and 0.31 degrees declination.Although this seems to be the result of multiple peak, but crowe, points out that in 1969, there are two time radar does not work, namely 20 to 22 March and 29 March - April 6, so even though it seems several groups have their own different greatly, but in 1969 the observed two group should be the same group.

　　Virgo k meteor shower

Visible date: April 16 ~ 25, right ascension: 210 declination: - constellation near 10: virgo characteristics: k is slow, the fireball