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Table 1.
Log of observations and production rates of 2I/Borisov with the WHT, INT, and TRAPPIST-North.
| Date | Telescope | rh | Delta | Exp. | Exp. time | Q(CN) | Q(C2) | Q(C3) | Q(OH) |
|---|---|---|---|---|---|---|---|---|---|
| UT | (au) | (au) | (s) | (molec/s) | (molec/s) | (molec/s) | (molec/s) | ||
| Sep 30−Oct 01 | INT | 2.51 | 3.01 | 5 | 1200 | (1.8 ± 0.1)×1024 | < 9 × 1023 | < 3 × 1023 | – |
| Oct 02 | WHT | 2.50 | 3.00 | 2 | 1200 | (1.9 ± 0.1)×1024 | < 6 × 1023 | < 2 × 1023 | < 2 × 1027 |
| Oct 13 | WHT | 2.36 | 2.77 | 3 | 1200 | (2.1 ± 0.1)×1024 | < 6 × 1023 | < 3 × 1023 | < 2 × 1027 |
| Oct 18 | TN | 2.31 | 2.67 | 1 | 1500 | (1.9 ± 0.6)×1024 | – | – | – |
| Oct 20 | TN | 2.29 | 2.64 | 1 | 1500 | (1.6 ± 0.5)×1024 | – | – | – |
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