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 5

Power-law fit β to the production rates () based on mapping data.

Molecule	H₂O	CH₃OH	NH₃	CO

Data based on analysis of mapping data
Pre-perihelion	− 5.0 ± 0.1	− 5.2 ± 0.5	− 5.8 ± 0.3	− 9.7 ± 2.6
Post-perihelion r_h < 1.52 AU	− 4.1 ± 0.2	− 3.2 ± 0.7	− 7.6 ± 0.4	− 1.1 ± 2.6
Post-perihelion r_h > 1.52 AU	− 7.9 ± 0.2	− 4.5 ± 0.2	− 5.7 ± 0.7	− 8.9 ± 1.3

Data based on analysis of nadir pointings

Pre-perihelion r_h < 2.8 AU	− 5.0 ± 0.5	− 6.8 ± 0.8	− 5.0 ± 0.6	− 7.6 ± 2.3
Post-perihelion r_h < 1.7 AU	− 5.3 ± 0.7	− 4.5 ± 0.9	− 7.8 ± 1.5	− 2.4 ± 1.5
Post-perihelion r_h > 1.7 AU	− 8.4 ± 0.4	− 4.9 ± 0.5	− 4.2 ± 1.0	− 6.3 ± 1.2

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