Periodic comet Swift-Tuttle (1992t) period 135 years was observed with 104 cm reflector of Uttar Pradesh State Observatory, Naini Tal, using OMA (Optical Multichannel Analyser) reticon array detector in the visible region of the spectrum on four nights of December 1992. The molelcular emission bands of CN (Δv = +1, 0, -1) at 4690 Å, 5160 Å and 5530 Å were indentified.
