Abstract
Spectral scans of the head of periodic Comet Halley (1982i) have been presented in the optical region (λλ3200–7000 A) for six nights. Emission features due to NH, CN, CH, C3, C2 and NH2 molecules have been identified. It is found that the comet exhibits night-to-night variation of emission bands. The abundances and production rates of CN and C2 species have been derived.
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