What constellations can Shanghai see _ What constellations can Shanghai see?

What constellation has a meteor shower every year?

Highly recommended: total solar eclipse on July 22nd,165438+1October 17: Leonid meteor shower, 12. 13- 14 Gemini meteor shower (described in detail below).

Meteor shower schedule

65438+ October

Meteor shower name: quadrant meteor.

Comet parent: 2003 EH 1

Radiation point: booth

Estimated date: 3rd to 4th.

Description: The flow rate is about 40 per hour, the color is blue, and the speed is relatively fast (about 40 kilometers per second). Brighter ones may cross half the sky, and a small part may even leave trace dust in the sky. There is an obvious peak, which usually lasts only about an hour.

April

Meteor shower name: Lyra meteor shower

Comet matrix: C/ Thatcher

Radiation point: Lyra

Estimated date of occurrence: 2 1 -22.

Summary: Bright and fast (about 48 kilometers per second) will leave traces of tracks in the sky, which will fade after a few seconds.

May

Meteor shower name: Eta Aquarius.

Comet parent: 1C/ halley

Radiant point: Aquarius Eta (Aquarius Eta)

Estimated date: 5th to 6th.

Summary: The density of meteors is high, but the flow rate is not very stable (the lowest is only a few dozen, and the highest may reach several hundred per hour). The equator and the southern hemisphere can be observed within a few hours before dawn, and the north is not conducive to observation. Many groups of meteors will leave long tracks in the sky.

June

Meteor shower name: Lyra meteor shower

Comet matrix: C/ Thatcher

Radiation point: Lyra

Estimated date: 14-16.

Description: The traffic is low, even in the peak period, the hourly traffic is only about 10. Patience is needed when observing.

July

Meteor shower name: Delta Aquarius.

Comet matrix: 1C/ halley

Radiation point: Aquarius Delta (Aquarius Delta)

Estimated date of occurrence: 28th-29th.

Caption: It is bright at about 20 o'clock at the peak, with a medium speed of about 40 kilometers.

Meteor shower name: Capricorn.

Comet matrix: not yet determined

Radiant point: Capricorn

Estimated date of occurrence: 29th-30th.

Description: At the peak, there are about 15 fireballs, which are bright and slow, only about 25 kilometers. The observation height is low.

August

Meteor shower name: Perseid meteor shower

Comet matrix: 109 p/ Swift-tuttle

Radiant point: Perseus

Estimated date: 12-13.

Description: the flow rate is large, and the peak flow rate is about 60 per hour. Low brightness requires patience when observing.

10 month

Meteor shower name: Dragon Head Constellation

Comet matrix: 2 1P/ Giacobini-Sinner

Radiant point: Perseus

Estimated date: 12-13.

Description: The flow rate is low, only about 10 pieces per hour.

Meteor shower name: Orion.

Comet matrix: 1P/ halley

Radiation point: Oruon.

Estimated date of occurrence: 2 1 -22.

Description: The flow rate of Orion meteor shower is about 20 per hour, the color is * * or green, and the speed is relatively fast, about 66 kilometers per second. There are fireballs.

1 1 month

Meteor shower name: Leonid meteor shower

Comet Matrix: 55p/ Temple-tuttle

Radiant point: Leo

Estimated date: 17-18.

Description: Leonid meteor shower has a peak flow every 33 years, and the peak flow can reach hundreds per hour. The next peak will be about 30 years later. Although it is not the peak time, we can still see some sporadic meteors crossing the sky.

65438+ February

Meteor shower name: Gemini meteor shower.

Mother: 3200 Phaeton

Radiant point: Gemini

Estimated date: 13-14.

Description: The most stable and colorful meteor shower in a year, of which white is about 65%, **26, and others are blue, red and green. Gemini meteor shower is the only meteor shower that is not the mother of comet. Its mother is the asteroid 3200 Phaeton. At peak hours, the hourly flow can reach hundreds.

Ursa meteor shower

Official name: URS, meteor shower in Ursa minor.

Activity time: 65438+February 65438+July-26th.

Maximum time: 65438+February 22/23.

Maximum flow (ZHR): 10

R value: 3.0

Average speed (without gravity): 33km/s.

Maximum center: 348 degrees right ascension and 75 degrees declination.

20 degrees north latitude (Nanning, Guangzhou, Haikou): It can be observed all night, preferably in the morning.

30 degrees north latitude (Lhasa, Chengdu, Chongqing, Wuhan, Hangzhou, Nanjing, Shanghai): It can be observed all night, and it is best in the morning.

40 degrees north latitude (Beijing, Hohhot, Dalian): It can be observed all night.

50 degrees north latitude (Tacheng, Harbin): It can be observed all night.

The center of the telescope field of view: right ascension 348 declination+75, right ascension13/kloc-0 declination+66 (latitude >); +40 )

Right ascension 063 declination +84 declination 156 declination +64 (30-40 N)

The ZHR value refers to the number of meteors that can be seen at the zenith every hour when the meteor shower reaches its peak, under the conditions of no light, no moonlight, clear weather and no wind. The number of meteors per hour in suburbs is about 40% of this number, and that in urban areas is about 2%. Therefore, if the landlord can't leave the city, it is not certain whether he can see a meteor.

The maximum period of meteor shower every year will not be less than 2 days. Because 2008 is a leap year, the meteor shower in 2009 was advanced by about 1 day. It is difficult to accurately predict the hour of meteor shower, because the mass of the material forming meteor shower is very small, and a little gravitational disturbance will change the time to reach the earth. The relatively accurate time is generally calculated one month in advance. If someone gives you an accurate time now, it must be this year or even a few years ago.

Astronomical phenomena worthy of special attention in 2009;

65438+10.3: Quadrant meteor shower in constellation. There may be a strong quadrant meteor shower in North America this morning. Observers in western North America are the luckiest. Within a few hours around 5 am Pacific Standard Time on the 3rd, the meteor shower in the quadrant of the United States and Canada reached its peak.

February 22-26: Planetary Trio. In these days, if you get up early, you will have a chance to see Jupiter, Mercury and Mars gathered in a circle of 5 degrees. About half an hour before the sun rises, you will see Jupiter and Mercury hovering above the horizon. Because of the weak light from the sun at dawn, it is difficult to see Mars without a telescope. What you saw on February 24th was the smallest virtual map including these three planets. On the morning of the 22nd and 23rd, the very faint waning moon will combine with these three planets in a very interesting way.

March 25th: Venus is both the morning star and the evening star. The position of Venus in the sky basically has an eight-year cycle, which means that the previous years of this phenomenon were 200 1, 1993, 1985, etc. In each cycle, we only have one chance to see Venus as both a morning star and a evening star one day in the northern hemisphere. This phenomenon will appear in a few days around March 25.

April 22: Venus becomes a occultation. On this day, before the sun rises, along the west coast of the United States, a thin waning moon can be seen passing in front of Venus. In the farther east, this phenomenon will occur after sunrise.

June 6: Alpha star in Scorpio becomes mysterious. After the evening of June 6, the brightness of the convex moon, which will become a full moon in about 15 hours, has reached 99%. At this time, it will pass in front of Supergiant star Scorpio alpha with first-class brightness and cover it. This occultation phenomenon can be seen in the central and eastern United States and parts of central Canada.

July 22nd is highly recommended: solar eclipse of the century. The longest total solar eclipse in 2 1 century will occur when the black shadow of the moon first falls in the Arabian Sea, and then passes through central and northeastern India, southeastern Nepal, most parts of Bhutan, northern Bangladesh, easternmost and southern India and central Tibet. Soon, the shadow of the moon will pass through central China, and then move to the East China Sea of China and parts of Ryukyu Islands. About 200 meters east-southeast of Iwo Jima is the best place to observe this solar eclipse. For some people, this may be the most perfect solar eclipse in 2 1 century. It is the longest solar eclipse between 199 1 and 2 132. This is an eclipse I am most concerned about. Although Shandong province is not a good observation site, it should be a partial solar eclipse. But at that time, we were on summer vacation, and we could go to nearby Jiangsu to watch the eclipse. Although it is only a few minutes, perhaps the beauty of astronomical wonders lies in its brevity. Turn to another article: "Tibet, Sichuan, Yunnan, Chongqing, Hubei, Henan, Hunan, Anhui, Jiangxi, Jiangsu, Zhejiang 1 1 provinces, municipalities and autonomous regions will be able to watch the total solar eclipse, while Shanghai is even luckier, and most parts of the city can watch this spectacle. The most exciting total solar eclipse is from 9: 00 to 9: 38 (Beijing time). " )

August10-September 4: Saturn without rings. Contrary to the maximum extension of Saturn's rings to the earth in 2003, from August 10 to September 4, 2009, the observer's line of sight on the earth (the connection between the observer and the celestial body) will be perpendicular to Saturn's axis of rotation, and it seems that the planetary rings have disappeared. The reason for this phenomenon is the relative positions of Saturn, the earth and the sun. The rapid movement of the earth's own orbit has changed our perspective of observing Saturn's rings from a certain position to the north. For about three weeks, people will not see the famous Saturn ring.

September 2-3: Jupiter without moons. Usually, with the help of a small telescope, you can see one or all four famous Galileo satellites of Jupiter. People will soon see at least two or three moons of Jupiter, sometimes four. It is very rare to see only one satellite, and it is even rarer not to see all satellites. On the night of September 2-3, people in many parts of the western hemisphere will not see Jupiter's moons for nearly two hours.

65438+1October 8: Mercury and Saturn are in close contact. 65438+1On October 8th, when the two planets rose from the horizon in western North America, the angle between Mercury at the lower right of Saturn and the ground was only 0.3 degrees. Mercury with brightness of -0.7 is almost five times as bright as Saturn, and Saturn's brightness is+1.0. In fact, this close contact between Mercury and Saturn is only the beginning of an ever-changing array, which also includes Venus (brightness of -3.9). 10 June 16 morning, a very weak waning moon will slowly move to the south of these three planets.

It is highly recommended (it is rumored that the maximum flow per hour is about 500, reaching the "second-class rainstorm level". Known as the "star rain", it is very likely that we will witness another astronomical spectacle that is once in a thousand years. Of course, the cycle of Leonid meteor shower seems to be 33 years. )165438+1October 17: Leo meteor. According to the joint forecast of California Institute of Technology and NASA, the Leonid meteor shower that occurred on June165438+1October 17 may have 500 meteors per hour. This strange landscape is expected to appear between 2 1: 34 and 2 1: 44 GMT, and can be observed in some parts of Asia.

Recommended 65438+February 13- 14: Gemini meteor. As the moon is still a new moon, it may be easier to observe these fireworks in the sky before Christmas. During the period from 12 to 14, people can expect to see as many as 120 meteors in the night sky every hour. I have to watch the Gemini meteor shower ~! )