When in a birth-chart, the planets are placed in the signs or fixed houses of each other, then the birth-chart will be known as the birth-chart of associated planets.
There are two types of associations of planets in the above mentioned birth-chart. Firstly sign change yoga forms between Saturn and Venus. It means that Venus is placed in the sign of Saturn, which is Capricorn, and Saturn is placed in the sign of Saturn, which is Libra, then this Kundali will be of associated planets.
Similarly, Sun and Jupiter are placed in the fixed houses of each other. It means that Sun is placed in the ninth house, which is the fixed house of Jupiter, and Jupiter is placed in the first house, which is the fixed house of Sun. They form house change yoga in the Kundali and this Kundali will also be known as the Kundali of associated planets.
Kundali of friendly planets will give more auspicious results. These associated planets give auspicious results, even when they have an enmity relationship with each other, and their negativity will also be finished in this situation, such as Sun and Saturn but Mercury has an exception.