Big Dipper _ Big Dipper constellation map

The Big Dipper refers to Shu Tian, Tian Xuan, Celestial Pole, Tianquan, Yuheng, Kaiyang and Yaoguang in the constellation Ursa major. People in ancient China associated these seven stars and imagined them as barrels of wine in ancient times.

Shu Tian Beidou-1 1

Constellation: Alpha Ursa major (Shu Tian, Hungry Wolf).

catalogue

The big dipper in the night sky

The Big Dipper in the Night Sky (20 photos)

Western name: Dubch

Bayer letter: Alpha Ursa major

Apparent magnitude: 1.79 and so on.

Absolute magnitude: 0.2, etc

Location (year J2000.0):

Right ascension:11h03m43.70s.

Declination:+6145' 03.2 "

Height: 54 12' 33 "

Azimuth: 048 49' 51"

U2000: Chart 24, Volume 1

Transfer: 04h 33m 1 1s

Distance: 124 2 light years

Brightness: 18 1 7 x solar luminosity.

2. Beidou II, Tian Xuan

Constellation: Beta Ursa major (Tian Xuan, Giant Gate).

Western name: Melak

Bayer letter: beta Ursa major

Value: 2.40

Location (year J2000.0):

Right ascension:11h01m50.49s.

Declination:+56 22' 56.6 "

Height: 52 25 ft 3 1 inch

Azimuth: 057 19' 13 "

U2000: Chart 46, Volume 1

Transfer: 04h 3 1m 18s.

Distance: 79.4 1. 1 light year

Brightness: 55.2 1.6 x solar luminosity.

3, Beidou-3, the secret

Constellation: Ursa Major γ (Scorpio, Lucun Star)

Western name: Phecda

Bayer letter: gamma Ursa major

Value: 2.50

Location (year J2000.0):

Right ascension:11h53m49.83s.

Declination:+53 41'41.1"

Height: 44 feet 38 inches 39 inches

Azimuth: 055 15' 46 "

U2000: Chart 47, Volume 1

Transit time: 05 hours, 23 minutes and 09 seconds

Distance: 83.7 1.4 light years

Brightness: 59.0±2.0 x the brightness of the sun.

4. Beidou 4, Tianquan

Constellation: Ursa Major δ (Tian Quan, Wenquxing).

Western name: May Gorez

Bayer alphabet: Ursa Major Delta

Value: 3.40

Location (year J2000.0):

Right ascension:12h15m25.57s.

Declination: +57 0 1' 57.3 "

Height: 43 59 ft 16 in.

Azimuth: 048 59' 49 "

U2000: Chart 47, Volume 1

Transfer: 05h 44m 4 1s

Distance: 8 1.4 1.2 light years

Brightness: 24.4 0.7 times that of the sun.

5, Beidou 5, Yuheng

Constellation: Ursa Major ε (Yuheng, Lian Zhenxing)

Western name: Aliot

Bayer letter: Ursa major ε

Magnitude: 1.77

Location (year J2000.0):

Right ascension:12h54m01.76s.

Declination:+55 57' 35.6 "

Height: 39 feet 06 inches 28 inches

Azimuth: 045 49' 31"

U2000: Chart 48, Volume 1

Transfer: 06h 23m 1 1s

Distance: 80.9 1.2 light years

Brightness: 98.7±3.0 x the brightness of the sun.

6. Beidou 6, Kaiyang

Constellation: Ursa Major ζ (Kaiyang, Wu Quxing)

Western name: Mizard

Bayer letter: zeta Ursae Majoris

Value: 2.40

Location (year J2000.0):

Right ascension:/kloc-0 13H23M55.55s

Declination:+54 55' 31.4 "

Height: 35 17' 26 "

Azimuth: 043 1 1' 00 "

U2000: Chart 48, Volume 1

Distance: 78.2 1. 1 light year

Brightness: 60.2 1.7 x solar luminosity.

7. Beidou 7, shake the lights.

Constellation: Ursa Major.

Western name: Alkaid/Benetnasch

Bayer letter: Eta Ursae Majoris

Magnitude: 1.86

Location (year J2000.0):

Right ascension:/kloc-0 13H47M32.44s

Declination: +49 18' 48. 1 "

Height: 28 feet 42 inches 54 inches

Azimuth: 044 29' 36 "

U2000: Chart 49, Volume 1

Transfer: 07h 16m 33s

Distance: 10 1 2 light years

Brightness: 14 1 6 x solar luminosity.

Extended data

Kaiyang gain satellite

Constellation: Ursa Major 80 (Kaiyang Zengyi, auxiliary star)

West Name: Alcaud

Magnitude: 3.95

Location (year J2000.0):

Right ascension:13h25m13.7s.

Declination:+54 59'16.8 "

U2000: Chart 48, Volume 1

Distance: 8 1. 15 light years

Spectrum: A5V-SB

"Historical Records Tianguanshu" records: "Auxiliary stars are bright and close, and auxiliary ministers are strong; Weak. " [2]? "Jin Shu Tian Wenzhi": "The auxiliary star is rich in Kaiyang, so the auxiliary war is successful, and so is the prime minister. Seven political stars are bright, their country is prosperous, and they are auxiliary stars, so the minister is strong. " ?

Song He? "Chun Zhu's story: the stone color is sky blue, the thin pool contains seven stars, arranged like a bucket, and the auxiliary stars are in the clouds. Because the purpose is to fight for the stars. " He Jingming's "Blame" in the Ming Dynasty: "It also made Beidou shake the discipline, and it was assisted by the stars."

Kaiyang is a famous binary star. Its companion star (Xiong 80) was named "Fu" in ancient China, with an angular distance of 1 1'49 "and a brightness of 3.95. The ancient army used this pair of binary stars to test soldiers' eyesight, which was used by both Chinese and foreign armies.

The auxiliary star Ursa Major 80 is the companion star of Ursa Major ζ (Kaiyang), also known as Zuo Fu. Many people use this auxiliary star to measure their eyesight. If we can distinguish this auxiliary star, our vision will reach 1.5.

Baidu Encyclopedia-Big Dipper