
The Arudha Lagna is a second Ascendant/Rising Sign. Where the Ascendant represents who you are, the Arudha represents how others see you. It is a reflection of self related to the Maya (material illusion).
To see how others perceive you, we need to see the natal chart from the position of the Arudha Lagna. This means to exchange the Ascendant with the Arudha Lagna.
The calculation to find the Arudha starts with how far the Ascendant lord is from the Ascendant. Then we need to add this amount to the Ascendant lord.
For example, let's say you have an Aries Ascendant. Mars would be the Ascendant lord.
Now let's say Mars is in the 5th House. It is positioned 5 Houses from the Ascendant.
So, 5 Houses from the 5th House is the 9th House. The 9th House for an Aries Ascendant is Sagittarius. So, the Arudha Lagna would be Sagittarius.
That can mean you are an independent, energetic, ambitious, and fun-loving person. However, people can see you as wise, ethical, and freedom-loving.
You might have conflict around this. It can feel like others don't see you clearly. However, embracing the Arudha can bring about fame. It can also help to deal with difficulties around the position.