 Upsilon Andromedae is the system 's Bayer designation . Under the rules for naming objects in binary star systems the two components are designated A and B. Under the same rules , the first planet discovered orbiting υ Andromedae A should be designated υ Andromedae Ab . Though this more formal form is occasionally used to avoid confusion with the secondary star υ Andromedae B , it is more commonly referred to as υ Andromedae b . The other planets discovered were designated υ Andromedae c , d and e , in order of their discovery . 
