Can you see the observation guide of annular eclipse on the day of summer solstice?

One of the most important astronomical phenomena this year will appear in the summer solstice, and this landscape can be seen in some parts of China. This annular eclipse is very rare. In order to better observe, let's reveal the observation guide of annular eclipse from summer solstice by constellation knowledge!

On the day of summer solstice, you can see the annular eclipse on June 2 1 this year (summer solstice), and the spectacle of annular eclipse will be staged in the sky of China. This will be the first time that China has witnessed an annular solar eclipse in eight years. If we miss this opportunity, we will have to wait another ten years to watch the annular eclipse in China (reappearing on June 1 day, 2030). On June 2 1 day, an annular eclipse appeared, with the highest food score of 0.994. The apparent radius of the sun is 15 minutes and 44.23 seconds, and the apparent radius of the moon is 15 minutes and 24. 18 seconds, with a difference of 20.05 seconds. Usually, the naked eye can see and distinguish objects with an opening angle greater than 60 seconds. So the naked eye (with the help of a filter) can see transit of venus, because the maximum apparent diameter of Venus can reach 60 seconds. But the transit of mercury is invisible to the naked eye, because the maximum apparent diameter of mercury is only 12 arc seconds. In this annular eclipse, the width of the halo exposed by the moon covering the sun is only 20.05 seconds, which is smaller than the apparent diameters of Venus and Jupiter seen by the public. The width of this halo is called "Phnom Penh solar eclipse", and most people have never watched or photographed it. The ring widths of the two previous annular eclipses observed in China were 64.77 arc seconds on May 20th12nd (the maximum eclipse was 0.9439) and 91.15th on May 20th10th respectively. According to reports, during the annular eclipse on June 2 1 this year, most parts of southern China were in flood season, with more rainy days. In the west of China, the probability of sunny days is higher, while in the east, the probability of rainy days is higher.

Different regions have their own advantages and disadvantages. Eclipses can be divided into partial eclipse, annular eclipse and total eclipse. "This eclipse in Phnom Penh is an annular eclipse, and the food is very close to 1. Whether it is a total solar eclipse or an annular solar eclipse, there will be a partial solar eclipse before and after the formation. " Qu Zhongquan, a researcher at Yunnan Observatory of Chinese Academy of Sciences who has been engaged in solar physics research for many years, introduced to the reporter of Science and Technology Daily. The observation site with good effect is in India, but the observation effect is also good in China and Tibet. The width of the annular eclipse belt observed in Ali, Tibet is only 20 kilometers, and that observed in Fujian and Taiwan Province provinces is only 40 kilometers. The eclipse in Phnom Penh is fleeting, the duration of the annular eclipse in Tibet is only 40 seconds, and the time to see food near the eastern center line does not exceed 1 minute. Such a short and spectacular celestial phenomenon must be arranged in advance if you want to observe it. The annular eclipse belt passes through some parts of eastern China, and the traffic is relatively convenient, but the probability of sunny days in this season is small; The transportation on the Qinghai-Tibet Plateau is inconvenient, but it is more likely to encounter good weather.

Observation points: astronomical phenomena name: Phnom Penh solar eclipse data: the solar eclipse reaches 0.994, that is, the sun is almost completely blocked by the moon. Food Belt Path: The circular food belt will enter from Mapang Yongcuo, the holy lake in Tibet, pass through the southern Sichuan Basin, enter Fujian through the northeastern part of Guizhou and the southern parts of Hunan and Jiangxi provinces, enter the sea in Xiamen, Fujian, and finally leave China through Taiwan Province Island. Eclipse time: June 2 1, 14:40, and the eclipse will reach its maximum; The first loss occurred from west to east from 13:30 to 15:00 Beijing time, and the eclipse occurred from 15:00 to 16: 15, and then from16. Observation range: Observed in Ali, Tibet, the width of the annular eclipse zone is only 20km, and observed in Fujian and Taiwan Province provinces, it is only 40km. Observation time: the duration of the annular eclipse in Tibet is only 40 seconds, and the time to see food near the eastern center line does not exceed 1 minute.

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