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Table 1
Previous upper limits on MBC gas production.
| MBC | Telescope | r | Obs. date | Q(CN) | Q(H2O) | Reference |
| (AU) | molec. s-1 | molec. s-1 | ||||
|
|
||||||
| 133P | VLT | 2.64 | 2007/07/21 | 1.3 × 1021 | 1.5 × 1024 | Licandro et al. (2011) |
| 176P* | Herschel | 2.58 | 2011/08/08 | – | 4 × 1025 | de Val-Borro et al. (2012) |
| 324P | Keck | 2.66 | 2010/10/05 | 3 × 1023 | 1 × 1026 | Hsieh et al. (2012c) |
| 259P | Keck | 1.86 | 2008/09/30 | 1.4 × 1023 | 5 × 1025 | Jewitt et al. (2009) |
| 288P | Gemini | 2.52 | 2011/12/02 | 1.3 × 1024 | 1 × 1026 | Hsieh et al. (2012b) |
| GTC | 2.52 | 2011/11/29 | 1.1 × 1024 | – | Licandro et al. (2013) | |
| 596† | Keck | 3.1 | 2010/12/17 | 9 × 1023 | 1 × 1027 | Hsieh et al. (2012a) |
| P/2013 R3 | Keck | 2.23 | 2013/10/01 | 1.2 × 1023 | 4.3 × 1025 | Jewitt et al. (2014) |
| 313P | Keck | 2.41 | 2014/10/22 | 1.8 × 1023 | 6 × 1025 | Jewitt et al. (2015) |
| P/2012 T1 | Keck | 2.42 | 2012/10/19 | 1.5 × 1023 | 5 × 1025 | Hsieh et al. (2013) |
| Herschel | 2.50 | 2013/01/16 | – | 7.6 × 1025 | O’Rourke et al. (2013) | |
Notes.
(†)
The dust ejected from (596) Scheila was almost certainly due to a collision, rather than cometary activity (e.g. Bodewits et al. 2011; Ishiguro et al. 2011; Yang & Hsieh 2011).
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