Table 4
Comets of class 1A or 1B or NG orbits according to MWC 08 and with orbital quality poorer than first class according to the proposed, modified classification of orbit quality for 28 small-perihelion comets (qosc< 3.1 au).
| Comet | Quality of orbit | 1 /aosc-uncertainty | Data | References | ||
| MSE method | MSE method | Modified method | in units of | interval | ||
| MWC 08 | applied to our orbits | [10-6 au-1] | [ months ] | |||
| class | Q (Eq. (3)), class | Q∗,Q( Eq. (4)), class | our analysis | |||
| (1) | (2) | (3) | (4) | (5) | (6) | (7) |
|
|
||||||
| C/1885 X1 | NG orbit | 7, 1B | 6.0, 6.0, 2a | 36.1 | 4.7 | Paper 1 |
| C/1892 Q1 | 1B | 7, 1B | 6.0, 6.0, 2a | 26.2 | 10.4 | Paper 1 |
| C/1952 W1 | 1B | 6, 2A | 5.5, 6.0, 2a | 187.5 | 7.3 | Paper 1 |
| C/1959 Y1 | NG orbit | 6, 2A | 5.0, 5.0, 2b | 101.5 | 5.5 | Paper 1 |
| C/1989 Q1 | NG orbit | 6, 2A | 5.5, 6.0, 2a | 25.9 | 4.1 | Paper 1 |
| C/2001 K3 | 1B | 7, 1B | 6.0, 6.0, 2a | 6.8 | 4.8 (3.0) | Paper 2 |
Notes. Orbital class is not specified in MWC 08 for comets with NG orbit given there; in Col. (6) the number in parentheses shows a shorter time interval of data available when completing MWC 08.
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