| Distribution des découvertes de PHA dans l'année par quinzaines | ||||||||||||||||
| Document mis au point par Michel-Alain Combes | ||||||||||||||||
| Lettre | avant | 1970- | 1980- | 1990- | 1995- | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | Total | % |
| quinzaine | 1970 | 1979 | 1989 | 1994 | 1999 | |||||||||||
| A | 1 | 2 | 4 | 5 | 1 | 11 | 5 | 4 | 4 | 3 | 7 | 7 | 54 | 5.36 | ||
| B | 2 | 5 | 2 | 2 | 2 | 5 | 6 | 3 | 7 | 2 | 2 | 38 | 3.77 | |||
| C | 1 | 1 | 4 | 3 | 7 | 2 | 6 | 4 | 2 | 3 | 6 | 3 | 7 | 49 | 4.87 | |
| D | 1 | 2 | 2 | 3 | 4 | 1 | 3 | 1 | 3 | 1 | 2 | 5 | 6 | 34 | 3.38 | |
| E | 1 | 2 | 3 | 2 | 12 | 2 | 5 | 4 | 1 | 8 | 3 | 7 | 50 | 4.97 | ||
| F | 1 | 1 | 8 | 7 | 5 | 3 | 6 | 2 | 1 | 4 | 2 | 40 | 3.97 | |||
| G | 1 | 7 | 5 | 4 | 5 | 4 | 4 | 13 | 3 | 2 | 48 | 4.77 | ||||
| H | 1 | 1 | 1 | 1 | 7 | 1 | 4 | 2 | 3 | 6 | 7 | 2 | 3 | 39 | 3.87 | |
| J | 2 | 2 | 8 | 3 | 2 | 6 | 3 | 5 | 1 | 3 | 5 | 40 | 3.97 | |||
| K | 1 | 1 | 4 | 2 | 5 | 3 | 2 | 3 | 1 | 9 | 1 | 3 | 35 | 3.48 | ||
| L | 1 | 1 | 3 | 3 | 1 | 5 | 6 | 3 | 2 | 6 | 2 | 33 | 3.28 | |||
| M | 1 | 2 | 4 | 1 | 2 | 3 | 5 | 5 | 1 | 1 | 3 | 1 | 29 | 2.88 | ||
| N | 1 | 3 | 4 | 2 | 1 | 4 | 1 | 2 | 18 | 1.79 | ||||||
| O | 2 | 4 | 3 | 1 | 2 | 2 | 4 | 2 | 7 | 27 | 2.68 | |||||
| P | 2 | 2 | 4 | 2 | 6 | 2 | 4 | 2 | 5 | 3 | 32 | 3.18 | ||||
| Q | 2 | 8 | 5 | 4 | 5 | 5 | 5 | 2 | 3 | 3 | 42 | 4.17 | ||||
| R | 1 | 2 | 4 | 3 | 1 | 1 | 6 | 7 | 2 | 2 | 4 | 3 | 36 | 3.57 | ||
| S | 2 | 2 | 2 | 17 | 3 | 10 | 5 | 3 | 2 | 3 | 7 | 3 | 7 | 66 | 6.55 | |
| T | 2 | 4 | 1 | 5 | 4 | 4 | 6 | 5 | 4 | 9 | 3 | 47 | 4.67 | |||
| U | 1 | 1 | 3 | 4 | 4 | 3 | 4 | 2 | 5 | 5 | 8 | 6 | 2 | 6 | 54 | 5.36 |
| V | 1 | 1 | 4 | 8 | 5 | 5 | 1 | 7 | 3 | 7 | 9 | 3 | 54 | 5.36 | ||
| W | 1 | 6 | 3 | 3 | 1 | 7 | 2 | 7 | 5 | 1 | 6 | 42 | 4.17 | |||
| X | 1 | 1 | 2 | 2 | 10 | 1 | 9 | 1 | 1 | 9 | 3 | 2 | 5 | 7 | 54 | 5.36 |
| Y | 1 | 5 | 5 | 5 | 1 | 12 | 8 | 2 | 4 | 3 | 46 | 4.57 | ||||
| Total | 10 | 7 | 25 | 41 | 131 | 76 | 82 | 93 | 82 | 97 | 97 | 84 | 84 | 98 | 1007 | 100 |
| Cumul | 10 | 17 | 42 | 83 | 214 | 290 | 372 | 465 | 547 | 644 | 741 | 825 | 909 | 1007 | ||
| Les chiffres retenus ci-dessus sont ceux de la liste des PHA du Minor Planet Center | moyenne………. | 42 | 4.17 | |||||||||||||