What is the thirteenth constellation found on the ecliptic?

Oph in Latin (165438+1October 30 to 65438+February 17) is one of the zodiac signs, located in the south of Perseus, north of Scorpio and Sagittarius and west of the Milky Way. Ophiuchus is the only constellation connected with another constellation-Ophiuchus. At the same time, Ophiuchus is the only constellation that spans the celestial equator, the Milky Way and the ecliptic. Ophiuchus is big and wide, rectangular, and the equator of the celestial sphere passes through this rectangle diagonally. Although Ophiuchus spans a short galaxy, the center of the Milky Way is Sagittarius, not far from Ophiuchus. The Milky Way has a prominent part here, forming the widest area of the Milky Way. In addition, although the ecliptic crosses Ophiuchus, Ophiuchus does not belong to the ecliptic. Every year around165438+1October 29th, the sun passes through Ophiuchus until it enters Sagittarius in February of 17. Scorpio has no solar terms on the ecliptic, and Ophiuchus has a solar term of heavy snow. In ancient star maps, Ophiuchus was depicted as a man holding a giant snake. On behalf of the ancient imperial doctor Asclepius. Ophiuchus α is the brightest star in Ophiuchus, a white giant (A5Ⅲ) with an apparent magnitude of 2.08, an absolute magnitude of 0.96 and a distance of 54 light years. Ophiuchus β is a red giant (K2Ⅲ), with an apparent magnitude of 2.77, a distance of 99 light years and an absolute magnitude of -0. 1. There is a large open cluster with few stars in its northeast 1 5.