Photometry of comet P/Halley at near post-perihelion phases
Photometric measurements of Halley’s comet at phases around its recent perigee are presented. Narrow band filters isolating C2 Swan band emission and a neighboring continuum, besides the standard UBV, have been used with 4 nucleus centered field stops subtending angles between 41″ and 1050″. The brightness fluctuations detected, especially conspicuous in C2 and the nearby continuum, indicate a period of 7.3 days. Some evidence for the double peaked nature of the periodic variation is marginally present.
Key wordscomets photometry
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