Long-slit spectrophotometry of P/Borrelly near the time of the deep space 1 encounter

Details Long-slit spectrophotometry of P/Borrelly near the time of the deep space 1 encounter Long-slit spectrophotometry of P/Borrelly near the time of the deep space 1 encounter

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.500..665h&link_type=abstract

In: Proceedings of Asteroids, Comets, Meteors - ACM 2002. International Conference, 29 July - 2 August 2002, Berlin, Germany. Ed

Physics

Comets: Spectrophotometry

Scientific paper

We obtained long-slit spectrograms of P/Borrelly on the nights of July 26, September 16, and September 17 2001 UT with the facility low-resolution CCD spectrometer at the Palomar 200-inch telescope. We also obtained spectra of C/2001 A2 and P/2001 Q2 during these runs and we derived production rates for H2O, CN, C2 and NH2 for all three comets. For P/Borrelly, we derived a peak water production rate Q(H2O) ~ 1.e28 molecules per second, significantly lower than obtained in the 1994 apparition. Normalised to water, our production rate ratios confirm that P/Borrelly belongs to the C2 depleted class of comets while both C/2001 A2 and P/2001 Q2 have "Normal" or Halley-type C2/H2O ratios.

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