Heavenly Trailer | Many meteor shower is about to appear, Venus meets the moon with the moon

The sky phenomenon that will appear next week will be the Venus on July 27. On July 28th, the south fish seat meteor shower is extremely heavy. On July 30th, the Bao Bingzan southern meteor shower and the Capricorn α meteor shower were extremely large. In addition, Shuoyue will appear at 1:55 on July 29.

Venus

In the early morning of July 27, we can enjoy the wonderful Venus with the moon phenomenon in the north of the east before dawn. On July 26th at 22:11 Venus, Venus to the moon's corner is only more than 3 degrees. It's just that they were below the horizon at the time, and we couldn't observe it.

In the early morning of July 27, Venus, Moon relative position diagram Source: Star Map Software

In the early morning of July 27, less than 2 hours before the sunrise, the bright Venus and a round of bending moon rose from the horizon north of the east, the moon was left, and Venus was right. Half. July 27th is the 29th lunar calendar. It was only two days before Shuoyue. The moon looks very, very detailed, and the moon may be easy to see when it is not as bright as the bright Venus. Venus's brightness is now -3.9 and so on. The two brightest celestial bodies in the night sky meet at close distance, which is a rare opportunity to observe shooting.

Meteor shower

Next week, several smaller meteor showers concentrated in the second half of the week, including southern fish meteor shower, treasure bottle Δ southern meteor rain, and Capricorn alpha meteor rain. The flow of these meteor shower is not large, but several meteor showers are superimposed, and the overall number of meteors will increase.

In addition, the Yingxian meteor shower, which reached a huge Yingxian on August 13, also began to enter the active period. Although the traffic of the meteor is not large, it will also increase the number of meteors. There may be a special meteor shower in these meteors, which is the meteor shower back. It does not belong to which constellation, and it will appear all year round. The center point of the radiation is always about ten degrees in the east that is about to the sun, and it is slowly moving on the zodiac. The meteor radiation area is an oval shape of about 30 degrees long and about 15 degrees north -south. The meteor traffic is always small, and the spain (ZHR) is generally around 2-3. At the end of July, the radiation point was near Capricorn. At this time, it was just a period of Shuoyue, and the moon would not affect the observation of meteors at all. Therefore, if you have the opportunity to go out of the outing to avoid the summer, just meet the sunny days, you can pay attention to the meteor in the sky at night.

South Fish Postelling Meteor Group, Treasure Bottle Δ South Meteor Group and Capricorn α Meteor Group

Radiation point Location Schematic Map Source: Star Map Software

In addition to the Yingxian meteor shower, the radiation points of these meteor shower are concentrated in the small range of Capricorn, Baotou, and Nangyu seats. It is difficult to distinguish between these different groups of meteors.

Judging which meteor group belongs to meteors is generally determined which location this meteor was launched from. No matter which meteor group of meteor groups, in theory, it can appear in any place in the sky. After a meteor appears, the meteor is extended in reverse. The position of the radiation point of this reverse extension line back to the position of the radiation point can basically determine which meteor shower the meteor belongs. But because the radiation points of these meteor shower are closer, it is not easy to judge. We can also try to determine the belonging of the meteor group through the speed of meteor. Treasure bottle Δ (Delta) south stars are the fastest, and the southern fish meteor shower is the slowest. But this requires a certain experience of observing meteors.

The active period of southern fish meteor shower is from July 15th to August 10th, and the maximum period appears on July 28. The spain is only 5, and the speed of the meteor is 35 km/s. Most of them are dark and the path is long.

The active period of Capricorn α meteor shower is from July 3rd to August 15th, and the maximum period is from July 30. The spain is also 5, the meteor is slow and bright, the speed is 23 kilometers/ second.

The appearance time of the southern stars (Delta) southern stars from July 12th to August 23rd, it lasted more than a month, and it also reached a large on July 30. 25. The dark star is mostly, the speed is 41 kilometers/s.

The southern meteor rain in the south of the treasure bottle Δ (Delta) is the meteor shower in the second day of the year.

Meteor shower is generally named after the constellation where the radiation point is located. If there are multiple meteor shower radiation points in the year, the radiation point of the meteor shower is located in a certain constellation. In order to distinguish, add the month of the meteor rain in front of the constellation name, or add it after the constellation name. The name of Liangxing near the radiation point is named meteor shower.

The two meteor rain radiation points of the Bottle seat are near the star of the Bottle seat (Delta). In order to further distinguish it, and the position of the meteor rain name is added. This is the southern star rain of the treasure bottle Δ (Delta), and the corresponding is the North Star Shower in the north of the treasure bottle Δ (Delta).

At the end of July, when the sky was completely dark, the treasure bottle and Capricorn were rising from the horizon from the east. The south fish seat had not risen out of the ground. Although it could be observed, the radiation point of the meteor shower at this time was low, and the number of meteors observed would be observed. Big discount. After midnight, these constellations rose to the south sky, and the meteor rain radiation point reached the highest, which is the best time to observe. However, because the radiation points of these meteor shower are located south of the equator, for people in the middle latitude of the north hemisphere, the level of radiation points will not rise too high when the highest level of radiation points. Even if there is no moonlight effect, the number of meteors that can be seen will be affected to some extent.

(Beijing Astronomical Museum)

Public account name: Beijing Institute of Science and Technology, Beijing Science and Technology Research Institute

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