Dim big Lights at the corner of a dark triangle-shaped object emiting lights for about 5 sec vanished suddenly.At around 2:00 or 2: 30 AM Indian time. I was out to see crab nebula through the telescope I newly bought. I sat gazing at the sky looking at other stars suddenly I saw dim lights from dark triangle shaped object, moving towards south for about 5 seconds, suddenly it vanishes and no where to be seen. It was slightly bigger than an aircraft. Didn't seem to be at a very high altitude. The light was reddish orange but dim very little irregular pattern pulsating vanished into thin air after 5 seconds, while it was still visible and moving with no sound.