Abstract:
Spectrophotometric studies of P /Halley (r = 1.98 AU, Δ= 1.19AU, r = 1.97, Δ = 1.16 AU and r = 1.95 AU, Δ. = 1.13 AU) in the spectral range 3900 A - 6450 A were made on three nights and identifications of emission features include: CO/sup+, C/sub3 , C/sub2 , CN, CH, NH/sub2 , H/sub3 , NaI, 0I and H/sub2O/sup+ molecules. For the first time H/sub3 molecule has been found in cometary atmospheres. Certain strong emission bands have been found in the spectra of P /Halley which are yet to be identified.
