Long-term luminosity variations and period changes in CG Cygni

We report new photometry of CG Cyg from 1998–2002. We also analyze published photometry collected since 1965. An O–C analysis reveals evidence of a third body in the system having a 51 year orbital period. After removing the effects of the third body, we note a remaining 22.5 year cyclic variation in the O–C curve that is similar to the period of the luminosity variations. Modeling the spot activity for 28 V band light curves obtained between 1965 and 2002 confirms the presence of two active longitude belts (ALBs) at approximately and . Most of the spots occur at mid latitudes with a few at low latitudes. We note no spots at latitudes greater than .