Photometric study of comets P/Faye 1991 XXI and Zanotta-Brewington 1992 III

We observed comets P/Faye 1991 XXI and Zanotta-Brewington 1992 III from the ESO La Silla Observatory (Chile) with photoelectric photometry and CCD techniques. We used narrow-band filters to calculate the Afϱ parameter and gas production rates for both comets. P/Faye has a low Q (CN) Afϱ of 14 × 10 2...

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Bibliographic Details
Published inPlanetary and space science Vol. 43; no. 6; pp. 737 - 745
Main Authors Jorda, L., Hainaut, O., Smette, A.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.06.1995
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Summary:We observed comets P/Faye 1991 XXI and Zanotta-Brewington 1992 III from the ESO La Silla Observatory (Chile) with photoelectric photometry and CCD techniques. We used narrow-band filters to calculate the Afϱ parameter and gas production rates for both comets. P/Faye has a low Q (CN) Afϱ of 14 × 10 21 molec s −2 cm −1 at perihelion, but a typical reddening between 11 and 15% 1000 A ̊ (between 4845 and 6840 Å). Furthermore, CCD imaging revealed a faint and diffuse asymmetry altributed to anisotropic outgassing. As expected for a newly injected comet, Zanotta-Brewington has a high Q (CN) Afϱ of more than 110 × 10 21 molec s −1 cm −1 which decreased with CN activity in March 1992. No reddening is measured from the continuum filters.
ISSN:0032-0633
1873-5088
DOI:10.1016/0032-0633(94)E0047-T