Please wait In sidereal astrology, there is a branch called "13 sign astrology". This is the only fork of science that considers Ophiuchus as a ecliptical constellation. My astrological service is built on this system, whose zodiacal signs completely coincide with astronomical constellations. But why does 12 sign tropical astrology use Ophiuchus?
People often ask me why natal chart calculation on my site shows incorrect data. That is, the planets, in their opinion, are not in the signs where they should be, and in general everything is different. Since the topic is raised often, and many people simply have not heard about sidereal astrology, which I use, I decided to write a special post and explain why some of my calculations do not agree with generally accepted astrology. Here you can express your opinion and ask questions. 
Since the trajectory of the Sun, when viewed from Earth, has a circular shape, we represent the zodiac as a circle. The circle is divided into sectors (zodiac signs), some of which are located opposite each other. Aries opposes Libra, Capricorn opposes Cancer, and sidereal Taurus is opposed by two constellations at once - Scorpio and Ophiuchus.
Since each zodiac sign has a ruler planet, the opposition of the signs generates a confrontation of the planets. For example, Mars (ruler of Aries) is the exact opposite of Chiron (ruler of Libra), and the Moon (ruler of Cancer) is the opposite of Saturn (ruler of Capricorn).
To clearly see the kinship and enmity of the signs, I made an infographic that reflects the actual planetary properties adapted to the sidereal zodiac. You can trace in which constellation the planet shows its strength and weakness, based on the traditional astrological concepts of domicile, exaltation, detriment and fall.
The presence of Ophiuchus on the ecliptic circle is a well-known fact. It's located between Sagittarius and Scorpio, and, according to the established opinion, is either completely or partially absorbed by Scorpio constellation. However, if you look closely at the map of the celestial sphere, you may be surprised to find that Ophiuchus covers the ecliptic much more than Scorpio. This means that the Sun stays in this constellation for a long time - in fact, 18 days a year. And, given the astrological principle that the energy of the constellations affects the inhabitants of the Earth, we can conclude that Ophiuchus persons are born much more often than Scorpios ones. But how can we adapt the astrological knowledge accumulated over the centuries to interpret the new constellation of the Zodiac? Maybe we can fill in the missing gaps with the help of Ophiuchus? Let's figure it out.
Many people perceive the Zodiac as something ephemeral and not quite true. They consider it the subject of complete harmony: 12 signs, 12 months, 12 houses, 4 elements, 3 spiritual areas, etc. At the same time, every zodiac sign have the size of 30 degrees, and it seems harmonious. Everything is fair, everything is equal. However, the Zodiac is not a figment of human imagination, despite the fact that the individual modeled it. But he did it, watching the sky! In space, as well as on Earth, phenomena don't have regular forms.
