Glowing and disappearing Starlike light.

I was having a cigarette on the roof of my apartment and above me to the ENE direction toward the New York city skyline almost directly above I witnessed a glowing star like object. This light would glow as bright as Venus or Jupiter though those planets were to the west of me on this night. The light would disappear for 10-15 seconds then light up again for a few seconds. The light would make no noise and was completely stationary. The sky was completely cloudless and the light was higher at least than any commercial aircraft.