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Title:
Water Production of Comets 2P/Encke and 81P/Wild 2 Derived from SWAN Observations during the 1997 Apparition
Authors:
Mäkinen, J. T. T.; Silén, J.; Schmidt, W.; Kyrölä, E.; Summanen, T.; Bertaux, J.-L.; Quémerais, E.; Lallement, R.
Affiliation:
AA(Geophysics Research, Finnish Meteorological Institute, Helsinki, Finland. ), AB(Geophysics Research, Finnish Meteorological Institute, Helsinki, Finland), AC(Geophysics Research, Finnish Meteorological Institute, Helsinki, Finland), AD(Geophysics Research, Finnish Meteorological Institute, Helsinki, Finland), AE(Geophysics Research, Finnish Meteorological Institute, Helsinki, Finland), AF(Service d'Aéronomie, Verrières-le-Buisson, France), AG(Service d'Aéronomie, Verrières-le-Buisson, France), AH(Service d'Aéronomie, Verrières-le-Buisson, France)
Publication:
Icarus, Volume 152, Issue 2, pp. 268-274 (2001). (Icarus Homepage)
Publication Date:
08/2001
Origin:
AP
DOI:
10.1006/icar.2001.6637
Bibliographic Code:
2001Icar..152..268M

Abstract

The water production rates of comets 2P/Encke and 81P/Wild 2 during their 1997 apparitions have been estimated from Lyman-α observations of the SWAN instrument and compared to previously published values. 2P/Encke was detected 28 times from few days preperihelion to 1.4 AU postperihelion with a perihelion water production rate QH_2O of 2×1028 s-1. This is the first observation of perihelion QH_2O of comet Encke. 81P/Wild 2 was detected 56 times from 1.64 AU preperihelion to 1.74 AU postperihelion with a perihelion QH_2O of 1.3×1028 s-1.
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