EXPLORATION OF SPECTRA OF COMET 81P/WILD 2 OBSERVED IN MARCH–APRIL 2010

К. І. Чурюмов, В. О. Пономаренко, В. В. Клещонок, О. Р. Баранський, Н. С. Коваленко

Abstract


Short period comet 81P/Wild 2 of Jupiter’scomet family was the main target of the space mission “Stardust” in 2005. Seven middle-resolution optical spectraof comet 81P/Wild 2 were obtained on 27–29 March and 2/3 April 2010 with the help of the 2-m Zeiss reflectorand echelle-spectrograph of the High-mountain astronomical station of Institute of Astronomy of Russian Academyof Sciences and Main Astronomical Observatory of National Academy of Sciences of Ukraine at Peak Terskol. Thecomet was at heliocentric distance 1.6 A.U. and geocentric one 0.7 A.U. and had the integral magnitude equal to9.8 mag. We present the energy distribution in the spectra of comet 81P and the identification of the spectral emissionlines in these spectra. Presence of luminescent continuum in the spectra of comet 81P is discussed and some physicalparameters of luminescent continuum were calculated.

Keywords


comet 81P/Wild 2; spectrum; emission lines; luminescent continuum.

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