Fig. 1
Raw (left panel) and phase-corrected (right) Afρ measurements of comet 1P/Halley during the 1986 apparition presented in Schleicher et al. (1998) and Fink (1994). The abscissa (X) represents the comet’s heliocentric distance to perihelion, arbitrarily negative for pre-perihelion measurements and positive for post-perihelion times (
, with t(q) being the time at perihelion).
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