July 29th is Leo.
Leo (Latin: Leo) is one of the zodiac signs, with an area of 946.96 square degrees, accounting for 2.296% of the whole day, ranking 12 out of 88 constellations in the whole day. There are 52 stars with Leo brightness greater than 5.5, the brightest star is Xuanyuan XIV (Leo α), and the apparent magnitude is 1.35. On the night of March 1 every year, Leo center passes through the transit.
Leo has been established for thousands of years. It is generally believed that in ancient Egypt more than 4,000 years ago, when the sun moved to the sky of Leo in midsummer every year, a large number of lions gathered in the Nile Valley to enjoy the cool, hence the name Leo.
Deep sky object
Xuanyuan XIV, the brightest star in Leo, is a blue-and-white star with an apparent magnitude of 1.35 and a luminosity of 2 1 in the whole night sky, with a distance of 84 light years. Xuanyuan Fourteen is located on the ecliptic, and occasionally the moon will cover Xuanyuan Fourteen because of its intersection with the ecliptic. A white star with an apparent magnitude of 2. 14 is also a shield triangle variable star 43 light years away.
Algie bar, tetrahedron, the brightness of sub-star γ 1 is 2.28, the brightness of sub-star γ2 is 3.53, and so on. The operating period of the two stars is 6 19 years. And two dim companion stars. Qiu right wall three, visual binary star, two sub-stars, etc. are 4.0 and 6.7 respectively. , the synthetic magnitude is 3.94. The magnitudes of binary star, binary star and sub-star are 4.5 and 6.3 respectively, and the synthetic magnitude is 4.3.