Table 3
Grid of models for C/2001 Q4 NEAT.
| Row | Models based on all data | Models based on all data | Models based on all data | Models based on all data | |
| No. | at large distances | at large distances | before perihelion | ||
| (r > 3.0 AU) | agreed with Combi et al. (2009) | ||||
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| [1] | type of data subsets | ALL | DIST1 | DIST2 | PRE |
| [2] | interval of observations | 24 Aug. 2001–18 Aug. 2006 | 24 Aug. 2001–18 Aug. 2006 | 24 Aug. 2001–18 Aug. 2006 | 24 Aug. 2001–15 April 2004 |
| [3] | interval of ejected data | – | 9 Nov. 2003–23 Nov. 2004 | 15 April 2004–25 July 2004 | after 15 April 2004 |
| [4] | Number of observations | 2681 | 692 | 1518 | 525 |
| [5] | Number of residuals | 5316 | 1369 | 3012 | 1030 |
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| NG model type: STD | |||||
| [6] | rms [arcsec] | 0.56 | 0.59 | 0.52 | 0.38 |
| [7] | χ2/probability | 31.17/0.0028 | 21.45/0.257 | 19.02/0.391 | 16.00/0.593 |
| [8] | 1/aori [10-6 AU-1] | 60.6 ± 0.8 | 36.2 ± 1.7 | 49.3 ± 1.0 | 33.3 ± 0.9 |
| [9] | 1/afut [10-6 AU-1] | –694.4 ± 0.5 | –676.4 ± 2.9 | ||
| [10] | qprev [AU] | 1.89 ± 0.05 |
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| NG model type: GEN | |||||
| [11] | NG parameters | r0 = 4.0 AU; | r0 = 4.0 AU; m = −1.9 | r0 = 4.0 AU; m = −1.9 | r0 = 4.0 AU; m = −1.9 |
| [12] | rms [arcsec] | 0.56 | 0.57 | 0.51 | 0.38 |
| [13] | 1/aori [10-6 AU-1] | 58.0 ± 0.8 | 36.9 ± 1.7 | 46.2 ± 1.0 | 28.9 ± 0.9 |
| [14] | qprev [AU] | 2.08 ± 0.07 |
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| NG model type: YAB | |||||
| [15] | rms [arcsec] | 0.56 | 0.57 | 0.51 | greater than STD |
| [16] | 1/aori [10-6 AU-1] | 54.6 ± 0.8 | 36.27 ± 1.7 | 43.1 ± 1.0 | |
| [17] | qprev [AU] | 2.44 ± 0.10 |
|
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Notes. Row [7] describes the result of χ2 test for sampling O–C distribution derived in a given type of data subset with 18 degrees of freedom in each case; first value represents the χ2-value, second – χ2 significance; for 18 degrees of freedom, the critical value of χ2 at a confidence level of 0.95 is equal to 28.87.
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