Weighted mean of production rates measured at the SMT on 13–16 January 2005 derived from excitation and radiative transfer models assuming a pointing offset of 8′′.

A water production rate of Q_H2O = 2.7 × 10²⁹  molec.  s^-1 was used to derive the mixing ratios, intermediate between the measurement on 20 January 2005 by the Odin satellite (Biver et al. 2007b) and the value derived from observations at infrared wavelengths on 19 January 2005 (Bonev et al. 2009).

Weighted mean of mixing ratios obtained on 28–29 November 2004 and 19 January 2005 with NIRSPEC on the Keck II 10-m telescope (Bonev et al. 2009).

Mixing ratios obtained on 30 January 2005 with NIRSPEC on the Keck II 10-m telescope (Kobayashi & Kawakita 2009).

Revised CH₃OH mixing ratios from Villanueva et al. (2012).

Production rates for H₂CO and CS assume the presence of an extended source described in the text.