This was achieved by making sensitive measurements of the Doppler shift of the spectrum of 55 Cancri A. At the time of its discovery, three other planets were known orbiting the star.
Isto foi conseguido a través de medicións sensibles ó efecto Doppler do espectro de 55 Cancri A. No momento do seu descubrimento, xa se coñecían outros tres planetas orbitando a estrela.