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Table 5

Average values of the line ratios for each comet.

Comet N

C/2002 V1 (NEAT) 5 3.05 ± 0.03 0.07 ± 0.01
C/2002 X5 (Kudo-Fujikawa) 3 2.99 ± 0.02 0.10 ± 0.003
C/2002 Y1 (Juels-Holvorcem) 4 2.98 ± 0.04 0.10 ± 0.01
C/2001 Q4 (NEAT) 4 3.21 ± 0.23 0.32 ± 0.02
C/2002 T7 (LINEAR) 3 3.31 ± 0.18 0.15 ± 0.05
C/2003 K4 (LINEAR) 3 3.14 ± 0.06 0.09 ± 0.01
9P/Tempel 1 10 3.14 ± 0.10 0.04 ± 0.01
73P-C/SW 3 1 3.25 0.11
73P-B/SW 3 1 3.03 0.11
8P/Tuttle 3 3.03 ± 0.01 0.05 ± 0.01
103P/Hartley 2 5 3.15 ± 0.07 0.08 ± 0.02
C/2009 P1 (Garradd) 2 3.15 ± 0.33 0.017 ± 0.04
C/2009 P1 (Garradd) 3 3.04 ± 0.03 0.07 ± 0.003

Notes.The errors listed are the standard deviation of the N spectra available for each comet. 73P-C/SW3 and 73P-C/SW3 have no error because we obtained only one spectrum for these comets.

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