M E T E O R

S H O W E R S

 

Denomination & characteristics

                It is a fragment of a meteoroid that has resisted the impact with the atmosphere & has reached the surface of the Earth or another planet before being consumed. The meteorites found in the Earth, according to their composition, are classified in three types: ferrous, composed fundamentally of iron, a small percentage of nickel & signs of other metals, like cobalt; stony, rocky meteorites composed of silicates, & stony-ferrous, that as much contain variable proportions of rock as of iron. Although, at the moment, it is thought that most of meteorites is fragments coming from asteroids or I commit, recent geoquimics studies have demonstrated that some rocks of the Antartida come from the Moon & Mars, from where, presumably, were sent by the explosive asteroid impact. The asteroids are, in themselves, fragments of small formed planets makes 4,600 million years while the Earth formed. One thinks that the ferrous ones correspond to the nuclei of small planets, whereas the stony ones (those that does not come from the Moon & Mars) correspond to the crust. The meteorites have an irregular surface & a carbonized outer layer generally, fused. Greatest they strike the Earth with a tremendous impact, creating deep craters.

       The greater meteorite well-known weight approximately 55 tons & is in Hoba West, near Grootfontein, Namibia. The following weight near 31 tons; (Store) is the Ahnighito & it discovered it, along with other two smaller meteorites, in 1894, near Castrates York, Greenland, the American explorer Robert Edwin Peary.

 

 

 

      Composed fundamentally of iron, these three masses have been used for a long time by inuit for the manufacture of knives & arms. Peary took the Ahnighito to the United States & Hayden of New York exhibits itself in the Planetarium. The greater well-known crater than is created has been produced by a meteorite was discovered in 1950 to the northwest of Quebec. It has a diameter of 4 km, it contains a lake, & it is surrounded by concentric fragmented granite walls.

Robert Edwing

Robert Edwin Peary

      Although its discovery has been put in doubt, the American explorer Robert Peary was made famous being first in arriving at the North Pole. In 1909, with a game formed by the explorer Matthew To Henson & four esquimales he arrived until the proximities of the pole. As civil engineer of the Navy of the United States his interest by the exploration of the Arctic arose in 1886, after to have made a trip to the interior of Greenland. In the sonorous sequence Peary he narrates his supposed arrival to the North Pole.

Hulton Deutsch Collection/Cortesía de Gordon Skene Sound Collection

   

The meteor, denomination

         It is a luminous phenomenon that takes place by the entrance in the planetary atmosphere of a solid body, meteoroide call, coming from the outer space, & his vaporization by the friction due to his great speed. Of isolated form shining, well-known meteors can be produced like balls of fire or bolides , that consist, generally, of a followed luminous head of a light wake, as the one of a comet, that can last during several minutes; some, calls bolides, explode with a sound like the one of a thunderclap.

        Sometimes they take place, also of isolated & sporadic form, weaker meteors, called fleeting stars . Sometimes, nevertheless, hundreds or thousand of these meteors during hours or days take place, & seems that they come from a fixed point. Meteor rains are denominated or radiating meteoric    & the name of the constellation occurs them in which it assumes have his point of origin. Some appear annually in such days of every year & periodic rains are denominated; others appear with little frequency & at intervals variable. The periods of meteor rains seems generally with those of certain comets. Most of the meteoroides vanishes in the atmosphere & falls to the Earth in dust form; the rest of the meteoroides that reach the Earth surface or another planet calls meteorites .

 

The meteoroid, denomination

            It is a solid body that turns around the Sun & gives rise to a meteor or stars fleeting when it enters the Earth atmosphere. The size of the great majority of the meteoroides is the one of a dust grain, but there are them of bigger  sizes without no defined limit, greatest can have a mass of several hundreds of tons.

 

schiaparelli.gif (43079 bytes)

Schiaparelli, Giovanni Virginio (1835-1910)

   Italian astronomer, who related the meteor rain to the rest of comets. He was born in Savigliano, Piedmont, he studied in the University of Turin & exerted like director (1862-1900) of the Brera Observatory in Milan. He is known mainly by being first in observing apparently straight lines in the Mars surface. The term used by him to define these marks, canali (river basins), badly was translated like ' canales', fortifying the opinion of some astronomers, like the American Percival Lowell, of which intelligent Mars life existed.

 

Processing of the Parts

            For the processing of the Parts of average or high activity & the Parts of Summary the calculation of the magnitude is necessary stellar limit during tonight. In all of them it appears the denominated MALE or magnitude stellar limit that already you can find the instructions in my Web to calculate it.

            Also, or he is available in my Web the instructions of of how filling up the Parts of Average or High Activity & the Parts of Summary.

 

 

 

Made observations

       Next one is all the made observations & that are to date computerized corresponding to made ordening per radiant meteor shower.

            Most of the observations they have been made from the locality of Inca, Majorca, Spain or next to her. With a group of friends forming the observation group UMA (Grup d'estudis meteňrics). The IMO code that I arrange is the 15.538

        In the Leonids of 1995 I moved with a group from friends to the province of Almeria, Spain to observe it. & spectacular Leonids & Geminids of 1998 & Pegasids , Perseids & d Aurigids of 1999 I observed them from the locality of Gorriti, Navarre, Spain; whose assigned code IMO was the 15.636.

           In order to be able to see anyone of the observations available you must select radiating meteoric with its corresponding code IMO & year of observation, since they are selected by connections.

 

 

     The nomenclature of radiating codes IMO of the meteoric ones is the following ones:

AMO: a Monocerotids

AUR: Aurigids

CAP: a Capricornids

DAU: d Aurigids.

DLE: d Leonids

GEM: Geminids

GIA: Draconids

JPE: Pegasids

KCG: k Cignids

LEO: Leonids

LIR: Lirids

NDA: Northern d aquarids

NTA: North Taurids

ORI: Orionids

PER: Perseids

QUA: Quadrantids

SDA: South d Aquarids

STA: South Taurids

ESP: Sporadics

 Masm © (Last update 02.26.2007)