Rahu and Ketu are nodal points but are given planetory status
Since they too travel around ( in the anti clockwise ) and the rishisfound them to have influenceon a person. They dont have any house of their own. They also have dasas and Bhuktis.
In Kaliyug Rahu is the one who gives fortunes & Powerand Ketu gives wisdom& sanyas, if placed propoerly.
7 palnets are given a day each. For Rahu and Ketu 1.5 hours given each every day ( Rahu kalam and Yama gandam) leaving 21 hours for the palnet of the day, like sun, moon etc.
Since Rahu and Ketu two opposing nodes and are given 21 hours together ( 7 days and 3 hours every day)