Table 6.
The N isotopic compositions of HCN and/or CN in Oort Cloud (OCC) and Jupiter Family (JFC) comets. Comet 8P/Tuttle is included in both as it has mixed orbital properties. The estimated bulk N isotopic compositions for the solar nebula, the terrestrial planets and Titan’s atmosphere are also included for comparison.
| 14N/15N | Ref. | |
|---|---|---|
| OCCs | ||
| Hale-Bopp | 140±35 | 1 |
| C/2002 T7 (LINEAR) | 160±25 | 2 |
| 8P/Tuttle | 150±20 | 3 |
| 153P/Ikeya-Zhang | 140±50 | 4 |
| 122P/de Vico | 145±20 | 4 |
| C/1999 S4 (LINEAR) | 150±50 | 5 |
| C/1999 T1 (McNaught-Hartley) | 160±50 | 2 |
| C/2000 WM1 (LINEAR) | 150±30 | 6 |
| C/2002 X5 (Kudo-Fujikawa) | 130±20 | 2 |
| C/2002 V1 (NEAT) | 160±35 | 2 |
| C/2002 Y1 (juels-Holvorcem) | 150±35 | 2 |
| C/2001 Q4 (NEAT) | 135±20 | 1 |
| C/2003 K4 (LINEAR) | 145±25 | 1 |
| C/2006 M4 (SWAN) | 145±50 | 2 |
| C/2007 N3 (Lulin) | 150±50 | 2 |
| C/2012 S1 (ISON) | 139±38 | 7 |
| C/2012 F6 (Lemmon) | 152±72 | 8 |
| C/2014 Q2 (Lovejoy) | 145±12 | 8 |
| JFCs | ||
| 88P/Howell | 140±20 | 5 |
| 9P/Temple 1 | 145±20 | 9 |
| 73P/Schwassmann-Wachmann 3 | 215±32 | 10 |
| 17P/Holmes | 139±25 | 11 |
| 8P/Tuttle | 150±30 | 3 |
| Other | ||
| Venus | 273±56 | 12 |
| Earth | 272 | |
| Mars | 280±5 | 13 |
| Angrites | 272±1 | 14 |
| Vesta | 277 | 15 |
| Titan | 168±2 | 16 |
| Solar | 441±6 | 17 |
7
NH3, Shinnaka et al. (2014).