Long-term monitoring of the outgassing and composition of comet 67P/Churyumov-Gerasimenko with the Rosetta/MIRO instrument

Rosetta mission full comet phase results

Open Access

Table 6

Integrated mass losses and relative abundances.

	H₂O	CH₃OH	NH₃	CO
	(10⁹ kg)	(10⁶ kg)	(10⁶ kg)	(10⁶ kg)

Data based on analysis of mapping data
Interpolated	2.42 ± 0.04	66 ± 3	8.1 ± 0.2	30 ± 10^(a)
Power-law fits	2.42 ± 0.14	64 ± 12	7.8 ± 1.0	24 ± 12
	100%	1.53 ± 0.08%	0.35 ± 0.01%	0.75 ± 0.24%

Data based on analysis of nadir pointings

Interpolated	3.30 ± 0.19	90 ± 5	10.5 ± 0.7	16 ± 1.7^(a)
Power-law fits	2.82 ± 0.67	76 ± 21	8.3 ± 3.4	13 ± 7.6
	100%	1.53 ± 0.13%	0.34 ± 0.03%	0.31 ± 0.04%

Notes. Relative abundances are given by numbers below the mass losses. ^(a) Includes extrapolation to 3.8 AU pre- and post-perihelion following the behavior of CH₃OH (i.e. adds 18.7 ± 2.7% mass loss beyond 2 AU from the Sun for mapping data and + 2.9% for nadir data).

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