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An accuracy estimation of CCD asteroid observations contained in the Minor Planet Center Database and carried out in the years 1999 - 2006 is realized. About 20 millions individual positions of the Numbered and Unnumbered Minor Planets were tested by means of calculations of (O-C) residuals to derive "mean error of a single observation" for more than 400 observatories with MPC codes. The EPOS software package created at Pulkovo observatory was used for processing.
The compiled Table presents every year results of regular observational work for each observatory. In the first column the MPC codes are given . The second column contains the name and country of observatory. In the columns 3 to 5 one can find the telescope's parameters, namely: diameter, focal length, field of view, scale of CCD matrix and astrometric catalogue used. The columns 6, 7 show the number of asteroids and their positions taken into consideration in our analysis. The last three columns present the main results of our work - the type and value of the "mean error of a single observation" for this observatory. Our abbreviations are:
int.n, int.unn - a mean error of a single observation derived from analysis of one
night CCD observations for numbered (n) and unnumbered (unn) asteroids;
ext.n, ext.unn - the same error derived from analysis of several close nights of
CCD observations of this observatory.
We are sure that these values of "mean errors of a single observation" may be useful in the weight assessment procedure in the orbits improvement and also for selection of advanced amateurs for participation in various observational campaigns.
Remarks:
1 for reliable estimation 7-10 asteroid CCD observations with 30-50 obtained positions must be taken into consideration using our method. In the case of 5 or less asteroids our estimation is rather qualitative than quantitative. We show these minimum results for preliminary estimation which will be improved in future.
2 Two asteroid positions obtained during one night were not considered.
3 Our Pulkovo method of an accuracy estimation was published in article:
Bykov O.P., L'vov V.N., Izmailov I.S., Sumzina N.K "Accuracy of positional CCD observations of the Numbered Minor Planets in 1999-2001"// Proc. of the International Conference "Asteroids, Comets, Meteors 2002", Berlin, Germany, 2002, Ю. 413 - 416.
ANY COMMENTS AND REMARKS, please, write to
Accuracy of the World CCD asteroid observations (MPC Database from 1999 to 2006) ------------------------------------------------------------------------------ MPC Country Diam. CCD Number of Mean error of a code Observatory Focus FOV scale, pla- posi- single observation (m) Catal. nets tions RA DEC Type ------------------------------------------------------------------------------ 12 Belgium, 0.85 45 x 30' 0.9" 15 69 0.23" 0.13" int n 1999 Uccle 2.1 GSC 12 16 111 0.38 0.28 int n 2000 8 73 0.39 0.24 ext n 12 43 282 0.40 0.29 int n 2001 22 185 0.69 0.72 ext n 12 34 293 0.40 0.31 int n 2002 12 175 0.34 0.25 ext n 12 127 899 0.42 0.40 int n 2003 27 334 0.38 0.42 ext n 164 1425 0.69 0.56 int un 75 966 0.70 0.59 ext un 12 153 1131 0.50 0.41 int n 2004 25 374 0.62 0.38 ext n 108 850 0.54 0.50 int un 26 401 0.52 0.56 ext un 12 162 1398 0.49 0.35 int n 2005 39 655 0.43 0.30 ext n 241 2188 0.72 0.53 int un 86 1303 0.72 0.54 ext un 12 100 712 0.53 0.42 int n 2006 19 230 0.43 0.38 ext n 14 81 1.00 0.86 int un 17 Germany, 1.0 No data 5 41 0.62 0.53 int n 2003 Hoher List GSC 7 47 1.15 0.65 ext n 5 25 1.15 0.80 ext un 26 Switzerland, 0.40 21 x 21' 1.2" 5 22 0.10 0.09 int n 2003 Bern Univer. 4.0 Tycho 17 61 0.39 0.34 int un 46 Czech Rep., 0.57 16 x 10' 1.8" 48 173 0.24 0.18 int n 1999 Klet 3.0 USNO 6 37 0.28 0.25 ext n 46 35 142 0.22 0.19 int n 2000 5 25 0.16 0.09 ext n 46 62 252 0.19 0.34 int n 2001 4 27 0.14 0.15 ext n 46 18 96 0.33 0.27 int n 2002 3 33 0.50 0.45 ext n 46 1.3" 7 47 0.22 0.22 int n 2003 67 449 0.60 0.57 int un 14 161 0.65 0.61 ext un 46 16 139 0.40 0.32 int n 2004 4 74 0.30 0.30 ext n 40 301 0.47 0.53 int un 14 169 0.49 0.55 ext un 46 5 29 0.36 0.30 int n 2005 39 267 0.35 0.37 int un 9 98 0.37 0.38 ext un 46 4 22 0.23 0.45 int n 2006 . 48 Hradec Kralove, 0.40 No data 12 165 0.47 0.34 int n 2004 Czech Republic 2.0 USNO 9 147 0.51 0.37 ext n 8 146 0.42 0.34 int un 7 140 0.46 0.37 ext un 48 4 32 0.70 0.27 int n 2005 3 29 0.90 0.32 ext n 8 58 0.51 0.25 int un 3 31 0.59 0.34 ext un 49 Sweden, 1.0 35 x 35' 1.0" 49 172 0.24 0.19 int n 1999 Kvistaberg USNO 15 78 0.32 0.20 ext n 49 191 866 0.20 0.22 int n 2000 53 368 0.47 0.29 ext n 49 521 1817 0.29 0.31 int n 2001 132 635 0.43 0.39 ext n 49 836 3177 0.34 0.27 int n 2002 145 1014 0.66 0.43 ext n 49 1188 4742 0.30 0.26 int n 2003 228 1745 0.64 0.42 ext n 879 3599 0.36 0.34 int un 182 1377 0.64 0.45 ext un 49 1023 3580 0.26 0.24 int n 2004 109 721 0.59 0.42 ext n 247 865 0.31 0.33 int un 23 169 0.90 0.44 ext un 49 512 1743 0.33 0.28 int n 2005 31 205 0.76 0.46 ext n 192 615 0.40 0.37 int un 8 48 0.78 0.45 ext un 49 6 36 0.39 0.40 int un 2006 . 54 Brorfelde, 0.77 No data 3 12 0.19 0.26 int n 2003 Danmark 2.3 USNO 7 21 1.20 0.76 int un 57 Yugoslavia, 0.14 30 x 20' 1.2" 3 37 1.51 1.44 int n 2001 Belgrade 1.6 GSC 57 3 28 0.42 0.38 int n 2002 57 Serbia and 7 56 1.09 0.89 int n 2003 Montenegro 4 24 3.36 1.01 int un 57 0.40 12 x 11' 0.7" 77 633 0.49 0.44 int n 2004 4.1 UCAC 3 32 0.40 0.56 ext n 14 137 0.31 0.37 int un 4 85 0.37 0.33 ext un 71 Bulgaria, 0.50 28 x 18' 1.1" 6 28 0.36 0.50 int n 1999 National Obs. 1.7 GSC 3 19 0.39 0.42 ext n 71 12 78 0.74 0.74 int n 2000 3 32 0.98 0.54 ext n 71 15 50 1.36 0.48 int n 2002 27 139 1.24 0.69 int un 8 60 0.90 0.74 ext un 71 15 65 0.94 0.69 int un 2004 4 21 0.36 0.76 ext un 71 5 16 0.72 0.49 int n 2005 39 172 1.02 0.84 int un 6 40 0.77 0.69 ext un 71 5 30 0.58 0.31 int n 2006 9 29 0.51 0.42 int un 84 Russia, 0.3 9 x 7' 1.5" 9 80 0.41 0.36 ext n 2002 Pulkovo Obs. 3.2 USNO 84 35 488 0.52 0.37 ext n 2003 47 387 0.48 0.56 ext un 84 90 923 0.36 0.32 ext n 2004 3 40 0.58 0.36 int un 61 451 0.46 0.36 ext un 84 Pulkovo Obs., 0.33 15 x 15' 1.0" 38 640 0.17 0.16 int n 2005 Normal Asgr. 3.0 UCAC 101 2384 0.28 0.27 ext n 22 303 0.25 0.24 int un 73 1255 0.33 0.29 ext un 84 52 2756 0.13 0.12 int n 2006 74 3631 0.26 0.22 ext n 12 90 0.34 0.25 int un 15 185 0.35 0.28 ext un 89 Ukraine, 0.70 8 x 6' 0.7" 8 381 0.19 0.20 int n 2004 Nikolaev AO 2.8 USNO 6 356 0.27 0.22 ext n 94 Russia, Sime- 1.0 6 x 5' 1" 6 29 0.40 0.33 int n 2002 iz, INASAN 2.2 USNO 94 6 28 0.75 0.95 int n 2006 . 95 Ukraine, 0.68 53 x 35' 2.2" 6 111 0.19 0.12 int n 2006 CrAO 0.9 . 97 Israel, 1.0 13 x 13' 0.7" 163 668 0.70 0.78 int n 2003 Wise Obs. 7.0 USNO 51 343 0.99 0.92 ext n 66 269 0.68 0.78 int un 18 128 0.65 0.92 ext un 97 151 565 0.46 0.36 int n 2004 65 362 0.51 0.42 ext n 63 269 0.61 1.33 int un 36 218 0.53 1.54 ext un 97 29 118 0.17 0.41 int n 2005 3 18 0.27 0.28 ext n 32 186 0.45 0.40 int un 9 117 0.63 0.42 ext un 97 19 96 0.26 0.24 int n 2006 . 104 Italy, San 0.40 21 x 21' 2.5" 14 63 0.39 0.32 int n 1999 Marccello 2.0 GSC 6 42 1.73 0.82 ext n 104 15 63 0.54 0.27 int n 2000 4 26 0.66 0.47 ext n 104 78 296 0.50 0.36 int n 2001 USNO 22 118 0.39 0.50 ext n 104 46 175 0.50 0.38 int n 2002 7 49 0.68 0.41 ext n 104 6 25 0.34 0.23 int n 2003 18 66 0.54 0.92 int un 104 66 239 0.40 0.35 int n 2004 88 378 0.75 0.43 int un 7 65 0.35 0.22 ext un 104 71 313 0.44 0.39 int n 2005 7 66 0.57 0.47 ext n 131 654 0.82 0.62 int un 30 286 0.65 0.56 ext un 104 580 2298 0.55 0.58 int n 2006 109 792 0.57 0.58 ext n 24 97 1.17 1.01 int un 106 Slovenia, 0.36 36 x 36' 2.0" 305 1003 0.48 0.45 int n 1999 Crni vrh 2.4 USNO 52 231 0.53 0.48 ext n 106 531 2118 0.40 0.35 int n 2000 129 717 0.37 0.38 ext n 106 568 2087 0.41 0.34 int n 2001 164 923 0.42 0.34 ext n 106 434 1468 0.40 0.37 int n 2002 51 339 0.38 0.37 ext n 106 3029 12363 0.38 0.34 int n 2003 638 4747 0.47 0.41 ext n 1306 5508 0.44 0.40 int un 315 2339 0.47 0.45 ext un 106 2696 8966 0.31 0.28 int n 2004 140 978 0.30 0.26 ext n 344 1142 0.41 0.38 int un 34 217 0.37 0.36 ext un 106 2684 9408 0.32 0.31 int n 2005 254 1592 0.32 0.32 ext n 240 840 0.45 0.44 int un 19 119 0.41 0.43 ext un 106 2264 9749 0.37 0.40 int n 2006 138 1112 0.34 0.41 ext n 21 84 0.43 0.42 int un 107 Italy, 0.40 14 x 10' 2.1" 4 12 0.40 0.34 int n 2003 Cavezzo 2.2 USNO 107 3 9 0.42 0.14 int un 2004 . 108 Italy, 0.30 14 x 12' 2.0" 21 76 0.89 0.84 int n 1999 Montelupo 1.7 GSC 9 39 0.74 0.68 ext n 108 8 33 0.45 0.51 int n 2000 108 7 39 1.10 0.99 int n 2002 USNO 3 21 1.12 0.43 ext n 108 12 73 1.60 1.50 int n 2003 6 51 1.75 1.52 ext n 14 67 1.26 1.60 int un 4 32 1.96 1.37 ext un 108 9 31 1.15 0.66 int n 2004 14 130 0.92 1.12 int un 7 96 1.17 1.04 ext un 108 5 19 0.61 0.77 int n 2005 11 52 0.64 1.09 int un 3 22 0.33 1.02 ext un 108 3 11 0.35 1.10 int n 2006 . 113 Germany, 0.50 13 x 10' 2" 12 47 0.17 0.24 int n 1999 Schonbrunn 2.3 USNO 5 25 0.47 0.52 ext n 113 20 136 0.53 0.28 int n 2000 7 59 0.31 0.28 ext n 113 25 167 0.34 0.26 int n 2001 113 77 378 0.51 0.41 int n 2002 7 97 0.73 0.47 ext n 113 56 221 0.35 0.29 int n 2003 7 49 0.38 0.40 ext n 213 1058 0.45 0.38 int un 42 434 0.58 0.48 ext un 113 107 443 0.36 0.28 int n 2004 11 80 0.28 0.27 ext n 180 937 0.44 0.34 int un 41 419 0.56 0.42 ext un 113 38 178 0.26 0.33 int n 2005 6 51 0.35 0.18 ext n 103 635 0.43 0.38 int un 22 307 0.46 0.41 ext un 113 77 527 0.43 0.32 int n 2006 17 268 0.39 0.27 ext n 19 77 1.79 0.74 int un 117 Germany, 0.20 15 x 11' 2.5" 26 322 1.37 0.85 int n 2000 Sendling 2.0 GSC 19 331 1.67 1.18 ext n 117 16 162 0.37 0.52 int n 2001 14 161 0.92 1.36 ext n 118 Slovakia, 0.57 14 x 10' 1.7" 26 130 0.22 0.16 int n 1999 Modra 3.3 USNO 42 262 0.37 0.30 ext n 118 14 54 0.20 0.18 int n 2000 20 122 0.31 0.28 ext n 118 20 77 0.18 0.21 int n 2001 11 60 0.29 0.33 ext n 118 16 64 0.24 0.16 int n 2002 118 23 252 0.27 0.18 int n 2003 10 193 0.39 0.24 ext n 118 182 1463 0.56 0.46 int un 2003 98 1147 0.56 0.48 ext un 118 52 241 0.36 0.24 int n 2004 4 64 0.12 0.17 ext n 79 467 0.48 0.50 int un 23 280 0.56 0.45 ext un 118 72 360 0.30 0.20 int n 2005 11 122 0.18 0.17 ext n 139 718 0.48 0.54 int un 24 260 0.45 0.34 ext un 118 58 299 0.20 0.18 int n 2006 12 129 0.15 0.12 ext n 18 71 0.43 0.40 int un 3 18 0.44 0.60 ext un 120 Croatia, 0.41 45 x 45' 2.6" 340 1399 0.51 0.35 int n 1999 Visnjan 1.9 USNO 314 2008 0.58 0.40 ext n 120 257 1133 0.64 0.40 int n 2000 188 1306 0.62 0.39 ext n 120 83 297 0.80 0.45 int n 2001 34 149 0.75 0.47 ext n 120 14 48 0.65 0.33 int n 2002 . 121 Ukraine, 0.70 10 x 8' 2" 11 86 0.46 0.57 int n 1999 Kharkov Univ. 2.8 GSC 4 69 0.61 0.72 ext n 121 9 106 0.36 0.39 int n 2000 7 115 0.62 0.59 ext n 121 3 21 0.53 0.48 int n 2001 3 23 0.38 0.41 ext n 122 France, 0.40 No data 4 19 0.40 0.43 int n 2001 Pises Obs. 1.9 USNO 122 9 51 0.22 0.24 int n 2002 122 3 10 0.33 0.38 int n 2004 122 73 273 0.43 0.33 int n 2006 5 37 0.26 0.35 ext n 126 Italy, 0.40 17 x 17' 1.8" 4 50 1.15 0.80 int n 2003 Monte Viseggi 2.4 GSC 13 82 0.97 0.88 int un 6 51 1.28 1.67 ext un 126 5 27 0.42 0.33 int n 2004 8 75 0.42 0.29 int un 4 44 0.62 0.26 ext un 127 Germany, 0.19 30 x 20' 2.4" 8 36 0.14 0.08 int n 1999 Bornheim 0.8 GSC 12 61 0.37 0.48 ext n 127 7 38 0.08 0.15 int n 2000 6 34 0.37 0.41 ext n 127 19 106 0.16 0.15 int n 2001 21 147 0.40 0.35 ext n 127 32 186 0.12 0.12 int n 2002 34 230 0.50 0.39 ext n 127 55 447 0.12 0.14 int n 2003 45 424 0.35 0.36 ext n 62 459 0.14 0.16 int un 55 458 0.27 0.28 ext un 127 29 204 0.12 0.12 int n 2004 15 150 0.21 0.21 ext n 18 174 0.16 0.21 int un 15 162 0.27 0.28 ext un 127 31 285 0.13 0.12 int n 2005 26 262 0.26 0.19 ext n 31 293 0.16 0.12 int un 24 264 0.30 0.23 ext un 127 28 220 0.13 0.12 int n 2006 10 188 0.24 0.31 ext n 13 84 0.11 0.13 int un 10 87 0.22 0.38 ext un 130 Italy, 0.4 15 x 10' 1.2" 10 40 0.35 0.27 int n 1999 Lumezzane 2.6 USNO 130 19 69 0.24 0.22 int n 2000 4 13 0.46 0.33 ext n 130 14 54 0.37 0.19 int n 2001 130 0.4 10 x 9' 1.0" 9 39 0.20 0.18 int n 2002 1.8 USNO 130 0.4 15 x 10' 1.0" 30 162 0.38 0.34 int n 2003 1.8 USNO 27 101 0.32 0.40 int un 130 63 245 0.23 0.27 int n 2004 58 242 0.34 0.29 int un 3 23 0.85 0.37 ext un 130 41 169 0.28 0.21 int n 2005 49 233 0.31 0.32 int un 4 61 0.45 0.38 ext un 130 59 223 0.27 0.25 int n 2006 39 162 0.33 0.28 int un 132 France, 0.26 45 x 30' 3.5" 18 75 0.35 0.34 int n 2002 Bedoin 0.9 USNO 5 36 0.62 0.55 ext n 132 0.30 25 x 17' 2.0" 12 39 0.62 0.76 int n 2003 0.9 USNO 43 160 0.73 0.35 int un 9 55 0.66 0.35 ext un 132 17 52 0.68 0.51 int un 2004 . 133 France, 0.20 33 x 22' 2.6" 16 51 0.27 0.27 int n 1999 Les Tardieux 0.7 USNO 133 5 15 0.42 0.44 int n 2000 133 11 36 0.47 0.30 int n 2001 . 138 France, 0.20 36 x 24' 2.8" 4 12 0.48 0.43 int n 1999 Village-Neuf 0.8 GSC 138 20 243 0.38 0.33 int n 2002 10 202 0.38 0.26 ext n 138 87 287 0.56 0.42 int n 2003 4 109 0.38 0.60 int un 138 7 21 0.33 0.44 int n 2004 138 183 621 0.41 0.36 int n 2005 12 80 0.38 0.35 ext n 35 116 0.54 0.49 int un 138 31 104 0.70 0.55 int n 2006 . 143 Switzerland, 0.40 20 x 20' 2.4" 12 57 0.49 0.30 int n 1999 Gnosca 1.6 GSC 5 40 0.56 0.56 ext n 143 14 100 0.37 0.19 int n 2000 3 21 0.96 0.39 ext n 143 19 184 0.36 0.32 int n 2001 6 76 0.87 0.78 ext n 143 29 196 0.44 0.42 int n 2002 8 90 0.52 0.67 ext n 143 23 104 0.60 0.51 int n 2003 24 131 0.95 0.69 int un 8 64 0.81 0.76 ext un 143 4 30 0.16 0.16 int n 2004