Anuradha is the seventeenth, ruled by Saturn, its symbol a lotus (the flower that opens out of mud), its deity Mitra — god of friendship and covenant (the word mitra simply means 'friend').
Mechanically Saturn is discipline, time and difficulty; Mitra is relationship held together by agreement. The lotus joins them: this segment's power is flowering in hard soil, and what makes the flowering possible is company. Saturn's difficulty is real, and Mitra's remedy is equally real — you don't get through on your own, you get through with people willing to be bound to you.
Where you'll recognise it: friends grow around you wherever you go, you take loyalty and promises seriously, you can stay in a hard environment, you have a gift for group dynamics, and carrying alone costs you unusually much. Running well, you're the best at holding people together: joining unlike people, keeping morale through difficulty, giving an organisation a centre. Stuck, you grit — doing everything yourself, needing people treated as weakness, or swallowing what shouldn't be swallowed to keep a relationship. Vishakha before it pushes; Jyeshtha after it is the eldest: with companions in place, the next thing is being pushed to the front.