I love tidbits and I am an Astro–Junkie. I bet you are, too, so here goes. The more I do charts, the more I learn. The more I learn, the more I share.
1. Watch the degree of the IC. In synastry, if a person puts his planet or asteroid on your IC, you will feel it to your bones. If it is Venus, you will feel loved. If it is Nessus, you will feel abused. If it is the Moon, you will resonate with his heart. If it is the Sun, he will bring you confidence. If it is Aphophis, he will emit a feeling of chaos that will go deep inside you. If it is Sado, he will be sadistic to you.
2. On your own natal chart IC, the same rule applies. In your early home, you will have the theme of that asteroid or planet. If it is Sado, someone in your early home was sadistic to you. If it is Venus, you were loved. If it is the Sun, you were given confidence. If it is Pluto, your early home was violent. If it was Mars, your early home had strife.
3.The Galactic Center (GC) is an important point. It has taken me a long time to understand it. I have my NN conjunct the GC. The GC represents the gateway to other dimensions. Someone with a strong GC, such as the Sun conjunct the GC, Moon conjunt the GC, Ascendant conjunct the IC etc will be interested in everything that has to do with other dimensions. I have studied OBEs(out of body experiences) and I disciplined myself to learn how to have them. This is an example of how the GC would function.
4.The vertex in the natal will show what other people will bring to you. If Pluto conjunct the vertex, powerful people will come into your life. If the Sun conjunct the vertex, people will bring you confidence. If Nessus conjunct the vertex, abusive people will come into your life.
5. The anti–vertex is what YOU bring to others. If you have the Moon conjunct the Anti-vertex, you will bring your heart to others. If you have Dejanira conjunct the anti-vertex, you will bring your victim self to others. If you have Mars conjunct the AV, you will bring drive to others. The anti vertex is the exact opposite point of the vertex.
6.The “bad” asteroids can make you strong, so don’t freak out about them. However, they are like a loaded gun, so handle with care. An example of this would be Nessus conjunct the Ascendant. This person will tend to be very abusive. Nessus conjunct the NN is the same. Nessus conjunct the Sun is the same, although this seems to be an aspect in many surgeons. They do need an inner strength to be able to cut into another human being.Sado does not seem as if it has redeeming traits. However, it is, likely, the same as Nessus.
7.Venus in any aspect to the Ascendant is an attractive person. With the positive aspects, such as the Trine, the beauty seems to be more classic. With the hard aspects, such as quincunx and square, the beauty is more edgy.The closer the aspect, the more attractive the person.