Table 1
Hydrocarbons detected by ROSINA in the coma of comet 67P in May 2015, July 2015, and May 2016.
| Molecule | Presence | ||
|---|---|---|---|
| Setting | I | II | III |
| Methane | + | + | + |
| Ethane | + | + | + |
| Propane | + | + | + |
| Butane | o | + | + |
| Pentane | o | + | + |
| Benzene | + | + | + |
| Hexane | – | o+ | o+ |
| Toluene | + | + | – |
| Heptane | – | o+ | – |
| Octane | – | o | – |
| Earth date | May 15 | July 15 | May 16 |
Notes. I: post-equinox period at 1.52 au. II: dust impact period close to perihelion at 1.27 au. III: close to outbound at 2.95 au. (+): species is present: parent and fragments are visible. (o+): presence of species at single events only. (o): presence of fragments, parent not detected. (–): species is not identified in this period. Detection limit is estimated to be 10 ions.
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