Table 1
Active Centaurs and transitional comets (as per November 2013).
| Groupa | qb [AU] | ac [AU] | e d | ie [o] | Pf [yr] | Reference | |
|
|
|||||||
| A | 29P/S-W 1 | 5.724 | 5.987 | 0.044 | 9.4 | 14.7 | (1) |
| 39P/Oterma | 5.471 | 7.251 | 0.245 | 1.9 | 19.5 | (2) | |
| 95P/Chiron | 8.454 | 13.710 | 0.383 | 6.9 | 50.7 | (3) | |
| 165P/LINEAR | 6.830 | 18.027 | 0.621 | 15.9 | 76.4 | (4) | |
| 166P/NEAT | 8.564 | 13.873 | 0.384 | 15.4 | 51.9 | (5) | |
| 167P/CINEOS | 11.788 | 16.167 | 0.269 | 19.1 | 64.8 | (6) | |
| 174P/Echeclus | 5.826 | 10.764 | 0.457 | 4.3 | 35.1 | (7) | |
| C/2001 M10 (NEAT) | 5.303 | 26.662 | 0.801 | 28.1 | 138 | (8) | |
| P/2005 S2 (Skiff) | 6.398 | 7.964 | 0.197 | 3.1 | 22.5 | (9) | |
| P/2007 S2 (Lemmon) | 5.549 | 12.551 | 0.555 | 16.9 | 44.1 | (10) | |
| 2003 QD112 | 7.935 | 19.084 | 0.583 | 14.5 | 83.4 | (11) | |
| C/2001 P2 (PanSTARRS) | 6.147 | 9.767 | 0.372 | 9.0 | 30.6 | (12) | |
| P/2010 TO20 (LINEAR-Grauer)e | 5.12 | 5.60 | 0.088 | 2.64 | 13.3 | (13) | |
| P/2011 S1 (Gibbs) | 7.025 | 8.449 | 0.168 | 2.7 | 24.6 | (14) | |
| C/2012 Q1 (Kowalski) | 9.482 | 26.154 | 0.638 | 45.2 | 134 | (15) | |
| C/2013 C2 (Tenagra) | 9.131 | 15.993 | 0.429 | 21.3 | 64 | (16) | |
|
|
|||||||
| B | P/2004 A1 (LONEOS) | 5.463 | 7.897 | 0.308 | 10.6 | 22.2 | (17) |
| P/2005 T3 (Read) | 6.202 | 7.507 | 0.174 | 6.3 | 20.6 | (18) | |
| P/2008 CL94 (Lemmon) | 5.436 | 6.170 | 0.121 | 8.3 | 14.4 | (19) | |
| P/2010 C1 (Scotti) | 5.235 | 7.065 | 0.259 | 9.1 | 18.8 | (20), this work | |
| P/2010 H5 (Scotti) | 6.026 | 7.144 | 0.157 | 14.1 | 19.1 | (21) | |
| P/2011 C2 (Gibbs) | 5.384 | 7.371 | 0.270 | 10.9 | 20 | (22) | |
|
|
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| C | P/1997 T3 (Lagerkvist-Carsenty) | 4.241 | 6.682 | 0.365 | 4.8 | 17.3 | (23) |
| P/1998 U3 (Jager) | 2.134 | 6.067 | 0.648 | 19.1 | 14.9 | (24) | |
| P/2003 L1 (Scotti) | 5.010 | 6.698 | 0.252 | 9.0 | 17.3 | (25) | |
| P/2008 T1 (Boattini) | 3.043 | 4.233 | 0.281 | 2.1 | 8.7 | (26) | |
| P/2010 H4 (Scotti) | 4.821 | 6.624 | 0.272 | 2.3 | 17.1 | (27) | |
Notes. Orbital parameters are from the JPL Horizon Data Base.
Reference. Code for the references (first discovery or discussion on activity): (1) Jewitt (1990); (2) Fernandez et al. (2001); (3) Kowal et al. (1977); (4) Kusnirak & Balam (2000); (5) Pravdo et al. (2001); (6) Romanishin & Tegler (2005); (7) Choi et al. (2006); (8) Lawrence et al. (2001); (9) Green (2005); (10) Buzzi et al. (2007); (11) Jewitt (2009); (12) Primak et al. (2011); (13) Lacerda (2013); (14) Gibbs et al. (2011b); (15) Miller et al. (2012); (16) Bressi et al. (2013); (17) Green (2004); (18) Read & Scotti (2005); (19) Scotti et al. (2009); (20) Scotti (2010); (21) Scotti et al. (2010); (22) Gibbs et al. (2011a); (23) Lagerkvist et al. (2000); (24) Green (1998); (25) Meyer (2003); (26) Boattini et al. (2008); (27) Green (2010).
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