How many times is Mercury's long-distance schedule in 2020?

Mercury distance can be divided into mercury east distance and mercury west distance. Mercury east distance means that mercury appears in the east of the sun, and mercury west distance means that mercury appears in the west of the sun. So how many times will the distance between Mercury be in 2020? Then let the constellation knowledge reveal the secret for everyone!

How many times will Mercury be far away in 2020? There will be six times in 2020, namely February 10, March 24, June 4, July 22, 65438+ 1 October165438+1October.

Mercury period of revolution takes about 88 days, and the rendezvous period with the Earth is about 1 16 days. Because of the large eccentricity and inclination of Mercury's orbit, the angular distance between Mercury and the sun varies from18 to 28 at each large distance.

At the beginning of the new year, mercury was hidden in the sun's brilliance near the total solar eclipse and could not be observed. In February, Mercury became a dim star, and it was low in the southwest after sunset. February 10, the eastbound distance of mercury. During the eastbound distance, the maximum angular distance between Mercury and the sun is 18, and the declination is also higher than the sun. For the area of 40 north latitude, the horizon height of Mercury at sunset is about 16, and the brightness is about -0.5, which is the best time to observe Mercury for the first time. After some distance, Mercury began to approach the sun again, and soon became the morning star after the next day. On March 24th, Mercury arrived far to the west. The separation angle from the sun can reach 28, but the declination is low, and the horizon height at sunrise is only10, so the observation conditions are not good.

It takes a long time for mercury to travel from the west to the east. On June 4th, Mercury reached its second easterly distance in the year, with an angular distance of 24 from the sun, a horizon height of18 at sunset and a brightness of +0.5. This is the second best time to observe Mercury this year. Mercury will have three big distances in the second half of the year. On July 22nd, Mercury was far away in the west and could be observed in the eastern sky before dawn. This time, the angular distance between Mercury and the sun is 20, but the horizon height at sunrise can reach15, and the brightness is about+0.3, which is also a good observation opportunity. After that, Mercury turned to the east of the sun and appeared at dusk.

On the surface of Mercury, on June+10/October 1 day, 65438, Mercury reached the easterly distance. Although the maximum angular distance from the sun can reach 26 this time, due to the low declination, the horizon height at sunset is only 8, and the observation conditions are not good. Mercury, after a distance of east, came to the west of the sun the next day. The last easterly distance in the year was 1 1 1. In this distance to the east, the observation conditions of Mercury are good, the maximum angular distance from the sun is 19, the horizon height at sunrise is about 17, and the brightness is about-. A simple rule can be found from the movement of mercury, that is, for the northern hemisphere, the observation conditions of the west distance in spring and the east distance in autumn are not ideal. This is caused by the declination angle, that is, the declination change of the ecliptic plane.

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