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Table 2

Abundances ratios derived from the optical and infrared data of comet 46P in its 2018 apparition.

UT date rh Δ Abundances (%) Reference

(au) (au) CN/OH HCN/H2O C2/OH C2H2/H2O C2H6/H2O NH/OH NH3/H2O
2018 Dec. 16 1.06 0.07 0.22 ±0.01 0.30 ±0.02 0.72 ± 0.05 This work
2018 Dec. 17 1.07 0.07 0.20 ±0.01 0.07 ±0.01 0.75 ±0.08 0.66 ±0.15 Bonev et al. (2021)
2018 Dec. 18 1.07 0.07 0.75 ±0.08 Roth et al. (2021a)
2018 Dec. 21 1.07 0.08 0.21 ± 0.01 0.08 ±0.01 0.71 ±0.09 0.50 ±0.06 Khan et al. (2021)
2018 Dec. 23 1.07 0.09 0.22 ±0.01 0.33 ±0.02 0.74 ±0.08 This work
2019 Jan. 10 1.12 0.17 0.33 ±0.01 0.43 ± 0.02 0.85 ±0.05 This work
2019 Jan. 11 1.13 0.18 0.68 ±0.06 McKay et al. (2021)

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