Results and Analysis of Infrared Photometry and Spectrophotometry for the Halley's Comet

From Mar.25-Apr.3 of 1986 some observations of Halley's Comet in the near infrared region ware made at Yunnan Observatory.The instrument used in the observations was an infrared photometer-spectrophotometer with J,H,and K standard filters and a CVF 1.3-2.6 Urn,Δλ/λ=2%).From results in the J,H and K bands it is clear that all infrared magnitudes of Halley's Comet were going to be faint during the period of observed time.Combined with our previous,data in the observations of Halley's Comet by the photoelectric photometry,it could be considered that this was the result of an outburst in the Comet perhaps just before infrared observation time.From results of the CVF observation in the 1.3-2.6μm it is obvious that some emissions at 1.4,1.9 and beyond 2.6μm appeared during observations.It seems that the emissions at 1.4 and 1.9μm came from H₂O and other possibly came from OH.