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What are the main features of the Perseid meteor shower in August 2018

4hw.com.cn: it's said that if you make a wish in the face of the meteor shower, your wish will come true. However, few people will see the meteor shower. In August, however, there will be the Perseid meteor shower called "Saint Laurent's tears", which will cross the northeast sky. Come and have a look.

Most romantic schedule in August

① On November 11, the last partial eclipse of this year was observed in the middle and east of China. The whole process can be seen in the West

② On the 13th, the Perseid meteor shower will pass through the northeast sky. You can see it with your naked eyes. The maximum hourly flow is expected to reach 140

③ On the 18th, the east of Venus is far away, and Venus is like a bright light hanging in the southwest low altitude

④ On the 27th, at a large distance to the west, mercury could be seen shining in the low altitude in the East before the sun rises.

What are the meteor showers in August 2018

Meteor shower in August 2018: Perseids in August, the expected date of occurrence is about 12-13.

Main characteristics of Perseid meteor shower

The Perseid meteor shower is not only numerous, but also almost never absent from the summer sky. It is the most suitable meteor shower for non professional meteor observers, ranking first among the three major periodic meteor showers of the year. Comet swift Tuttle is the mother of the Perseid meteor shower. Around the perihelion of the comet in 1992, the Perseid meteor shower was brilliant, with more than 400 meteors per hour.

The mother object of the Perseid meteor shower is comet swift middot Tuttle with a 133 year period. The comet was discovered by Louis swift and Tuttle in 1862. Later, Giovanni Schiaparelli, an Italian astronomer, suggested that it might be the mother of the Perseid meteor shower. This is also the first time that comets have been identified as the parent object of meteor showers. At that time, it was predicted that comet swift middot Tuttle would be periodically regressed around 1982, but it was not observed.

At maximum, 30-60 meteors can appear in an hour, which is the most active period of the year. In the days before and after the climax, there are more than 10 per hour. Due to the summer vacation, the night temperature is also relatively high, known as one of the most easily observed meteor showers.

The brightness of meteors is generally above second class, similar to that of the Big Dipper. Occasionally, there will be colorful firestars, which are as bright as Venus. Because there are many bright meteors, even in urban areas with serious light damage, sometimes many meteors can be seen. In the ideal observation area, nearly a thousand meteors may be seen all night.

The Perseid meteor shower is a group of high-speed meteors with a speed of 59 km / s, and 45% of them have trails. And may be in the middle of the passage more bright, easy to form meteor marks.

2018 Perseid meteor shower observation guide

The observation of meteor shower should be conducted directly with the naked eye without telescope, because the observation of meteor shower requires a large field of view, the field of view of human eye is more than 100 degrees, while the ordinary telescope only has a few degrees, so it is not easy to see with telescope. At the same time, the weather is also a very important factor, high transparency, sunny, moonless night is most suitable for viewing. Remember the observation time, cold and insect proof. It has been said that there are more meteors in the second half of the night than in the first half of the night. All night is a common observation. You can bring tents, folding chairs, flashlight, food and so on.