Yingxian's meteor shower, Mercury East is about to come, and the scenes of the sky are constantly

The most noteworthy natural phenomenon next week is the great Yingxian meteor shower in the early morning of August 13. The full moon will appear at 9:36 on August 12. Since the near -August 11th place was on the place, it was only more than one day from the full moon, and the full moon was still relatively large. Saturn month will occur on August 12. In addition, Mercury will occur on August 28. From next week, we have the opportunity to find a rare Mercury in the evening in the evening.

British fairy meteor shower

The Yingxian Meteor Shower is one of the three largest meteor shower in the northern hemisphere, and the other two are Gemini Meteor Shower and Elephant Meteor Shower. However, these two meteor shower occurred in December and January, which is the coldest winter in the northern hemisphere. It is cold and cold, and it is very difficult to observe. The Yingxian meteor shower appears in summer, and the observation conditions are relatively comfortable.

In the early morning of August 13th, the radiation point location of the Yingxianxian group radiation point Source: Star Map Software

The time period of the Yingxian Meteor Shower lasts for more than a month from July 17th to August 24th. Generally, around August 13, the meteor traffic reaches a large amount, and the spain can reach more than 100. This year, the great period of the Yingxian Meteor Shower Forecast appeared in the early morning of August 13, Beijing time, and it was more suitable for watching from the evening of the 12th to the early morning of the 13th. ZHR is around 100, not to say that we can see 100 meteors in an hour. It is an ideal frequency that can appear under the ideal situation of various conditions. For example, the radiation point of meteor shower is located on the top of the head, the atmosphere should be transparent, the stars that can be seen are the darkest, there is no obstruction of the sky, etc. It is the theoretical value calculated by the formula. In actual situations, these conditions cannot be fully achieved, so the number of meteors we can see is greatly reduced. As the Yingxian meteor shower coincides with the full moon, the moonlight will seriously affect the number of meteors that can be observed. Some darker meteors will be flooded in the moonlight. The observation conditions are very bad, and the number of meteors that can be seen is relatively limited.

In this season, shortly after dark, Yingxian will rise from the horizon in the northeast. Due to the low rain radiation point of meteor at this time, the number of meteors can not be seen too much. Nearly midnight, the Yingxian seat has risen in the air, and the number of meteors seen will increase. After midnight, the radiation point will continue to rise. At this time, the meteor shower will be great, and it is the best time to observe. Observation can continue until dawn.

Observation strategy

Observation venue selection of meteor shower is very important. Lighting interference has a great impact on meteor observation. It is best to choose the outskirts far away from urban light pollution. Do not have the interference of strong light sources around, try to stay away from tall buildings and trees. Try not to cover the sky as much as possible. Safety is the most important, and you must be familiar with observation venues in advance. Although it is summer, it is still very cold at night, pay attention to bringing warm clothes. In addition, mosquito bite in summer is also a trouble, it is best to bring the medicine with mosquito repellent. Observation meteors generally do not use any observation equipment, you can use the naked eye. The visual range of the telescope is too small, but it is not suitable for meteor observation. Meteor may appear in any direction in the sky, and the field of vision must be widened. Standing up and watching the meteor will soon be sour when you take your neck. It will be more comfortable to take a sitting or lying posture. If possible, you can prepare a chair and moisture -proof pad.

The meteor of the British Fairy Meteor Group is faster, up to 59 kilometers/s, and belongs to the high -speed meteor group. The time for meteor itself to pass the night sky is only a few seconds, and it is fleeting. It may disappear if you cheer. Some of the brighter meteors will leave more than a second after flashing.

Most of the meteor rain comes from comets. The mother of the Yingxian Meteor Shower is the 109P Swift Tattel of 133 years. The comet was first discovered in July 1862, and the last return was in 1992. In 1991 and 1992, the scale of the Yingxian meteor rain broke out at least twice the year in the past, with a maximum traffic of about 400 per hour.

Mercury East distance

Mercury will occur on August 28. During this time, it will appear at the low -altitude of the evening. Mercury is the closest planet to the sun, and is the most difficult to observe among the five major planets. Because most of the year, it always appears near the sun, annihilating the light of the sun. Only when it opens up with the sun angle, can we have the opportunity to observe it barely. Mercury reaches the biggest angle to the east of the sun is the east. A total of 6-7 times in the Middle East and the West Grand distance will appear 6-7 times.

On the evening of August 28, Mercury Location Schematic Map Source: Star Map Software

This year Mercury will have four east distances, this time the third time this year. Mercury's horizon is not the same at every time Dongda's sunset. Relatively speaking, the observation conditions are good or bad, and sometimes because the height is too low, it is not suitable for observation.

Observation strategy

On August 28th, Mercury East Big distance was the worst to observe Mercury this year. It is difficult to observe and is very challenging. For Beijing, Mercury's horizon height was only more than 9 degrees during sunset. Shortly after the sun fell, when it was dark to the extent that could be observed, Mercury's horizon was only a few degrees, and soon the horizon would be dropped, and the observation was very difficult.

Observation time is not limited to the day of August 28.From the beginning of next week, Mercury's horizon has reached more than 9 degrees during sunset.The height on the weekend will increase slightly, which is slightly higher than the height of the day.Mercury's brightness is between -0.2 and other-0, which is brighter than the east. The weather is fine and you can try to find it at low altitude in the West.Observation can start 15 minutes after the sun.At this time, it is not completely dark. It is difficult to see the stars in the naked eye. It is best to use a small binocular telescope to assist the observation. The opportunity for success can be greatly improved.(Beijing Astronomical Museum)

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