IOTA/IOTA-ES occultation update for (217) Eudora / 2UCAC 34047471 event on 2012 Dec 22, 14:44 UT Visible from New Zealand, Australia Summary ------- On 2012 Dec 22 UT, the 68 km diameter asteroid (217) Eudora will occult a 12.5 mag star in the constellation Taurus for observers along a path across New Zealand, Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.1 mag to 14.4 mag (the magnitude of the asteroid) for at most 5.8 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 75 * date and approx. time of event: 2012 Dec 22, 14:37 - 2012 Dec 22, 14:49 UT * geocentric midpoint of event [JD]: 2456284.1141875 * magnitude of target star: 12.5 * magnitude drop [mag]: 2.1 * estimated maximum duration [s]: 5.8 * Moon: 73 % sunlit, 43° distance * Sun: 152° distance * rough path description: New Zealand, Australia The occultation path -------------------- * approximate projected width [km]: 89 * 1 sigma uncertainty interval [path widths]: +/- 0.75 * 1 sigma uncertainty interval [seconds]: +/- 4.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .032 +/- .033) * 1 sigma uncertainty ellipse (major, minor, PA): ( .033", .032", 359° ) * approx speed of asteroid's shadow [km/s]: 11.7212 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of 2UCAC 34047471 by 217 Eudora on 2012 Dec 22 Centre Star Star Sun Path Limits Error Limits E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Latitude Latitude Latitude Latitude 63 0 0 -31 4 50 14 49 52 28 61 -1 -30 40 44 -31 29 4 -30 4 51 -32 5 42 64 0 0 -31 3 34 14 49 47 29 61 -1 -30 39 28 -31 27 48 -30 3 36 -32 4 26 65 0 0 -31 2 29 14 49 42 30 60 -2 -30 38 24 -31 26 43 -30 2 31 -32 3 20 66 0 0 -31 1 35 14 49 37 30 59 -3 -30 37 30 -31 25 49 -30 1 38 -32 2 26 67 0 0 -31 0 53 14 49 32 31 59 -4 -30 36 48 -31 25 6 -30 0 56 -32 1 43 68 0 0 -31 0 21 14 49 26 32 58 -4 -30 36 16 -31 24 34 -30 0 24 -32 1 11 69 0 0 -31 0 0 14 49 21 33 57 -5 -30 35 55 -31 24 13 -30 0 4 -32 0 50 70 0 0 -30 59 51 14 49 15 33 56 -6 -30 35 46 -31 24 4 -29 59 54 -32 0 40 71 0 0 -30 59 52 14 49 9 34 55 -6 -30 35 47 -31 24 5 -29 59 56 -32 0 41 72 0 0 -31 0 4 14 49 3 35 55 -7 -30 36 0 -31 24 17 -30 0 8 -32 0 53 73 0 0 -31 0 28 14 48 57 35 54 -8 -30 36 23 -31 24 41 -30 0 32 -32 1 17 74 0 0 -31 1 2 14 48 51 36 53 -8 -30 36 57 -31 25 15 -30 1 6 -32 1 51 75 0 0 -31 1 47 14 48 45 37 52 -9 -30 37 42 -31 26 0 -30 1 51 -32 2 36 76 0 0 -31 2 43 14 48 39 37 51 -10 -30 38 39 -31 26 56 -30 2 47 -32 3 32 77 0 0 -31 3 50 14 48 32 38 50 -11 -30 39 45 -31 28 3 -30 3 54 -32 4 39 78 0 0 -31 5 8 14 48 26 39 49 -11 -30 41 3 -31 29 21 -30 5 12 -32 5 57 79 0 0 -31 6 36 14 48 20 39 48 -12 -30 42 32 -31 30 50 -30 6 40 -32 7 26 80 0 0 -31 8 16 14 48 13 40 47 -12 -30 44 11 -31 32 29 -30 8 19 -32 9 6 81 0 0 -31 10 6 14 48 6 40 46 -13 -30 46 1 -31 34 19 -30 10 9 -32 10 56 82 0 0 -31 12 7 14 48 0 41 45 -14 -30 48 1 -31 36 20 -30 12 9 -32 12 57 83 0 0 -31 14 18 14 47 53 42 44 -14 -30 50 13 -31 38 32 -30 14 20 -32 15 9 84 0 0 -31 16 40 14 47 46 42 43 -15 -30 52 34 -31 40 54 -30 16 42 -32 17 31 85 0 0 -31 19 12 14 47 39 43 42 -16 -30 55 6 -31 43 26 -30 19 14 -32 20 4 86 0 0 -31 21 55 14 47 32 43 41 -16 -30 57 49 -31 46 9 -30 21 56 -32 22 48 87 0 0 -31 24 48 14 47 25 44 40 -17 -31 0 42 -31 49 3 -30 24 48 -32 25 42 88 0 0 -31 27 52 14 47 18 44 39 -17 -31 3 45 -31 52 7 -30 27 51 -32 28 46 89 0 0 -31 31 5 14 47 10 45 37 -18 -31 6 59 -31 55 21 -30 31 4 -32 32 0 90 0 0 -31 34 29 14 47 3 45 36 -18 -31 10 22 -31 58 45 -30 34 28 -32 35 25 91 0 0 -31 38 3 14 46 56 45 35 -19 -31 13 56 -32 2 19 -30 38 1 -32 39 0 92 0 0 -31 41 48 14 46 48 46 34 -20 -31 17 40 -32 6 4 -30 41 44 -32 42 45 93 0 0 -31 45 42 14 46 41 46 33 -20 -31 21 33 -32 9 58 -30 45 37 -32 46 40 94 0 0 -31 49 45 14 46 34 47 31 -21 -31 25 37 -32 14 2 -30 49 40 -32 50 45 95 0 0 -31 53 59 14 46 26 47 30 -21 -31 29 50 -32 18 16 -30 53 53 -32 54 59 96 0 0 -31 58 22 14 46 18 47 29 -22 -31 34 13 -32 22 40 -30 58 15 -32 59 24 97 0 0 -32 2 55 14 46 11 48 27 -22 -31 38 46 -32 27 13 -31 2 47 -33 3 58 98 0 0 -32 7 37 14 46 3 48 26 -23 -31 43 27 -32 31 56 -31 7 28 -33 8 41 99 0 0 -32 12 29 14 45 56 48 25 -23 -31 48 19 -32 36 48 -31 12 19 -33 13 34 100 0 0 -32 17 30 14 45 48 48 23 -23 -31 53 19 -32 41 50 -31 17 19 -33 18 36 101 0 0 -32 22 41 14 45 40 49 22 -24 -31 58 29 -32 47 1 -31 22 28 -33 23 48 102 0 0 -32 28 0 14 45 33 49 20 -24 -32 3 48 -32 52 20 -31 27 46 -33 29 8 103 0 0 -32 33 28 14 45 25 49 19 -25 -32 9 16 -32 57 49 -31 33 13 -33 34 38 104 0 0 -32 39 5 14 45 17 49 17 -25 -32 14 52 -33 3 27 -31 38 49 -33 40 16 105 0 0 -32 44 51 14 45 9 49 16 -26 -32 20 38 -33 9 13 -31 44 33 -33 46 4 106 0 0 -32 50 46 14 45 2 49 14 -26 -32 26 32 -33 15 8 -31 50 26 -33 51 59 107 0 0 -32 56 49 14 44 54 50 13 -26 -32 32 34 -33 21 12 -31 56 28 -33 58 4 108 0 0 -33 3 0 14 44 46 50 11 -27 -32 38 45 -33 27 24 -32 2 38 -34 4 17 109 0 0 -33 9 20 14 44 38 50 10 -27 -32 45 4 -33 33 44 -32 8 56 -34 10 38 110 0 0 -33 15 47 14 44 31 50 8 -27 -32 51 31 -33 40 13 -32 15 23 -34 17 7 111 0 0 -33 22 23 14 44 23 50 7 -28 -32 58 6 -33 46 49 -32 21 57 -34 23 44 112 0 0 -33 29 7 14 44 15 50 5 -28 -33 4 50 -33 53 33 -32 28 39 -34 30 30 113 0 0 -33 35 58 14 44 7 50 4 -28 -33 11 40 -34 0 25 -32 35 29 -34 37 22 114 0 0 -33 42 57 14 44 0 50 2 -28 -33 18 39 -34 7 25 -32 42 27 -34 44 23 115 0 0 -33 50 4 14 43 52 49 1 -29 -33 25 45 -34 14 32 -32 49 32 -34 51 31 116 0 0 -33 57 18 14 43 44 49 360 -29 -33 32 58 -34 21 46 -32 56 44 -34 58 46 117 0 0 -34 4 39 14 43 37 49 358 -29 -33 40 18 -34 29 8 -33 4 3 -35 6 9 118 0 0 -34 12 6 14 43 29 49 357 -29 -33 47 45 -34 36 36 -33 11 30 -35 13 38 119 0 0 -34 19 41 14 43 21 49 355 -29 -33 55 20 -34 44 12 -33 19 3 -35 21 15 120 0 0 -34 27 23 14 43 14 49 354 -30 -34 3 1 -34 51 54 -33 26 43 -35 28 58 121 0 0 -34 35 11 14 43 6 48 352 -30 -34 10 48 -34 59 43 -33 34 30 -35 36 48 122 0 0 -34 43 6 14 42 59 48 351 -30 -34 18 42 -35 7 38 -33 42 23 -35 44 44 123 0 0 -34 51 6 14 42 51 48 349 -30 -34 26 42 -35 15 39 -33 50 22 -35 52 46 124 0 0 -34 59 13 14 42 44 48 348 -30 -34 34 48 -35 23 47 -33 58 28 -36 0 55 125 0 0 -35 7 26 14 42 36 47 347 -30 -34 43 1 -35 32 0 -34 6 39 -36 9 9 126 0 0 -35 15 45 14 42 29 47 345 -30 -34 51 19 -35 40 20 -34 14 56 -36 17 30 127 0 0 -35 24 9 14 42 22 47 344 -30 -34 59 42 -35 48 45 -34 23 19 -36 25 55 128 0 0 -35 32 39 14 42 14 46 343 -30 -35 8 11 -35 57 15 -34 31 47 -36 34 27 129 0 0 -35 41 13 14 42 7 46 341 -30 -35 16 46 -36 5 50 -34 40 20 -36 43 3 130 0 0 -35 49 54 14 42 0 46 340 -30 -35 25 25 -36 14 31 -34 48 59 -36 51 45 131 0 0 -35 58 38 14 41 53 45 339 -30 -35 34 9 -36 23 17 -34 57 42 -37 0 31 132 0 0 -36 7 28 14 41 46 45 338 -30 -35 42 59 -36 32 7 -35 6 31 -37 9 22 133 0 0 -36 16 22 14 41 39 44 336 -30 -35 51 52 -36 41 2 -35 15 23 -37 18 18 134 0 0 -36 25 21 14 41 32 44 335 -30 -36 0 50 -36 50 1 -35 24 21 -37 27 18 135 0 0 -36 34 24 14 41 25 43 334 -30 -36 9 53 -36 59 4 -35 33 22 -37 36 23 136 0 0 -36 43 31 14 41 19 43 333 -30 -36 18 59 -37 8 12 -35 42 28 -37 45 31 137 0 0 -36 52 42 14 41 12 42 332 -30 -36 28 9 -37 17 23 -35 51 37 -37 54 43 138 0 0 -37 1 56 14 41 5 42 330 -30 -36 37 23 -37 26 38 -36 0 51 -38 3 59 139 0 0 -37 11 14 14 40 59 41 329 -30 -36 46 41 -37 35 57 -36 10 7 -38 13 18 140 0 0 -37 20 36 14 40 52 41 328 -29 -36 56 2 -37 45 19 -36 19 27 -38 22 41 141 0 0 -37 30 0 14 40 46 40 327 -29 -37 5 26 -37 54 44 -36 28 51 -38 32 7 142 0 0 -37 39 27 14 40 40 40 326 -29 -37 14 53 -38 4 12 -36 38 17 -38 41 35 143 0 0 -37 48 58 14 40 33 39 325 -29 -37 24 22 -38 13 42 -36 47 46 -38 51 7 144 0 0 -37 58 30 14 40 27 39 324 -29 -37 33 55 -38 23 15 -36 57 17 -39 0 40 145 0 0 -38 8 5 14 40 21 38 323 -28 -37 43 29 -38 32 51 -37 6 51 -39 10 17 146 0 0 -38 17 43 14 40 15 37 322 -28 -37 53 6 -38 42 29 -37 16 28 -39 19 55 147 0 0 -38 27 22 14 40 9 37 321 -28 -38 2 45 -38 52 8 -37 26 6 -39 29 35 148 0 0 -38 37 3 14 40 4 36 320 -28 -38 12 26 -39 1 50 -37 35 46 -39 39 18 149 0 0 -38 46 46 14 39 58 36 319 -27 -38 22 8 -39 11 33 -37 45 28 -39 49 1 150 0 0 -38 56 30 14 39 52 35 318 -27 -38 31 52 -39 21 18 -37 55 12 -39 58 46 151 0 0 -39 6 16 14 39 47 34 317 -27 -38 41 37 -39 31 3 -38 4 56 -40 8 33 152 0 0 -39 16 2 14 39 41 34 316 -26 -38 51 23 -39 40 50 -38 14 42 -40 18 20 153 0 0 -39 25 50 14 39 36 33 315 -26 -39 1 10 -39 50 38 -38 24 29 -40 28 8 154 0 0 -39 35 38 14 39 31 32 315 -26 -39 10 58 -40 0 26 -38 34 16 -40 37 57 155 0 0 -39 45 26 14 39 26 32 314 -25 -39 20 47 -40 10 15 -38 44 4 -40 47 46 156 0 0 -39 55 15 14 39 21 31 313 -25 -39 30 35 -40 20 4 -38 53 52 -40 57 35 157 0 0 -40 5 4 14 39 16 30 312 -25 -39 40 24 -40 29 53 -39 3 41 -41 7 25 158 0 0 -40 14 53 14 39 11 30 311 -24 -39 50 13 -40 39 42 -39 13 29 -41 17 14 159 0 0 -40 24 42 14 39 7 29 310 -24 -40 0 1 -40 49 31 -39 23 18 -41 27 3 160 0 0 -40 34 30 14 39 2 28 309 -23 -40 9 49 -40 59 19 -39 33 5 -41 36 52 161 0 0 -40 44 17 14 38 57 28 309 -23 -40 19 37 -41 9 7 -39 42 53 -41 46 40 162 0 0 -40 54 4 14 38 53 27 308 -23 -40 29 24 -41 18 54 -39 52 39 -41 56 27 163 0 0 -41 3 50 14 38 49 26 307 -22 -40 39 9 -41 28 40 -40 2 25 -42 6 13 164 0 0 -41 13 35 14 38 45 26 306 -22 -40 48 54 -41 38 25 -40 12 9 -42 15 57 165 0 0 -41 23 18 14 38 41 25 305 -21 -40 58 37 -41 48 8 -40 21 53 -42 25 41 166 0 0 -41 33 0 14 38 37 24 305 -21 -41 8 19 -41 57 50 -40 31 34 -42 35 22 167 0 0 -41 42 40 14 38 33 24 304 -20 -41 17 59 -42 7 30 -40 41 14 -42 45 2 168 0 0 -41 52 18 14 38 29 23 303 -20 -41 27 37 -42 17 8 -40 50 53 -42 54 40 169 0 0 -42 1 54 14 38 26 22 302 -19 -41 37 13 -42 26 44 -41 0 29 -43 4 16 170 0 0 -42 11 27 14 38 22 21 302 -19 -41 46 47 -42 36 17 -41 10 3 -43 13 50 171 0 0 -42 20 59 14 38 19 21 301 -18 -41 56 18 -42 45 49 -41 19 35 -43 23 21 172 0 0 -42 30 28 14 38 16 20 300 -18 -42 5 47 -42 55 17 -41 29 4 -43 32 49 173 0 0 -42 39 54 14 38 13 19 299 -17 -42 15 14 -43 4 43 -41 38 30 -43 42 15 174 0 0 -42 49 17 14 38 10 19 299 -17 -42 24 37 -43 14 6 -41 47 54 -43 51 37 175 0 0 -42 58 37 14 38 7 18 298 -16 -42 33 57 -43 23 26 -41 57 14 -44 0 57 176 0 0 -43 7 54 14 38 4 17 297 -16 -42 43 14 -43 32 42 -42 6 32 -44 10 13 177 0 0 -43 17 7 14 38 1 16 296 -15 -42 52 28 -43 41 55 -42 15 46 -44 19 26 178 0 0 -43 26 17 14 37 59 16 296 -15 -43 1 38 -43 51 5 -42 24 56 -44 28 35 179 0 0 -43 35 23 14 37 56 15 295 -14 -43 10 44 -44 0 11 -42 34 3 -44 37 40 180 0 0 -43 44 25 14 37 54 14 294 -14 -43 19 47 -44 9 13 -42 43 6 -44 46 42 -179 0 0 -43 53 23 14 37 52 14 293 -13 -43 28 45 -44 18 10 -42 52 5 -44 55 39 -178 0 0 -44 2 17 14 37 50 13 293 -13 -43 37 40 -44 27 4 -43 1 0 -45 4 32 -177 0 0 -44 11 7 14 37 48 12 292 -12 -43 46 30 -44 35 53 -43 9 51 -45 13 21 -176 0 0 -44 19 52 14 37 46 11 291 -11 -43 55 15 -44 44 38 -43 18 37 -45 22 5 -175 0 0 -44 28 33 14 37 44 11 291 -11 -44 3 56 -44 53 18 -43 27 18 -45 30 44 -174 0 0 -44 37 9 14 37 43 10 290 -10 -44 12 33 -45 1 54 -43 35 55 -45 39 19 -173 0 0 -44 45 39 14 37 41 9 289 -10 -44 21 4 -45 10 24 -43 44 27 -45 47 49 -172 0 0 -44 54 5 14 37 40 9 288 -9 -44 29 30 -45 18 50 -43 52 54 -45 56 13 -171 0 0 -45 2 26 14 37 39 8 288 -9 -44 37 52 -45 27 10 -44 1 16 -46 4 33 -170 0 0 -45 10 42 14 37 37 7 287 -8 -44 46 8 -45 35 25 -44 9 33 -46 12 47 -169 0 0 -45 18 52 14 37 36 6 286 -7 -44 54 18 -45 43 34 -44 17 44 -46 20 56 -168 0 0 -45 26 56 14 37 35 6 286 -7 -45 2 23 -45 51 38 -44 25 50 -46 28 59 -167 0 0 -45 34 55 14 37 35 5 285 -6 -45 10 22 -45 59 36 -44 33 50 -46 36 56 -166 0 0 -45 42 48 14 37 34 4 284 -6 -45 18 16 -46 7 29 -44 41 45 -46 44 47 -165 0 0 -45 50 35 14 37 33 4 283 -5 -45 26 4 -46 15 15 -44 49 33 -46 52 33 -164 0 0 -45 58 16 14 37 33 3 283 -4 -45 33 45 -46 22 56 .. .. .. -47 0 13 -163 0 0 -46 5 51 14 37 32 2 282 -4 -45 41 21 -46 30 30 .. .. .. -47 7 46 -162 0 0 -46 13 20 14 37 32 1 281 -3 -45 48 50 -46 37 58 .. .. .. -47 15 13 -161 0 0 -46 20 42 14 37 32 1 281 -3 -45 56 13 -46 45 20 .. .. .. -47 22 34 -160 0 0 -46 27 58 14 37 32 0 280 -2 -46 3 30 .. .. .. .. .. .. .. .. .. Uncertainty in time = +/- 4 secs Prediction of 2012 Dec 17.0 Data for the target star ------------------------ * name: 2UCAC 34047471 * constellation : Taurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 04 31 59.5015 DE: +06 44 43.319 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .026, .030 ) * V mag [mag]: 12.5 * B mag [mag]: 0.0 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (217) Eudora approx. diameter [km]: 68 approx. diameter ["]: .044 distance from Earth [AU]: 2.12700 * orbital information: orbit source: Preston date of fit: 2012 Dec 16 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1200 number of rejected observations: 55 time covered by the observations: 1904 Jun 14 - 2012 Dec 06 1 sigma uncertainty ellipse (major, minor, PA): 0.019, 0.013, 82° remarks: * orbital elements for (217) Eudora : Mean anomaly = 83.02590956 deg Arg. of pericenter = 154.82210356 deg Long. of node = 162.95502132 deg Inclination = 10.45511069 deg Eccentricity = 0.30403511 Semimajor axis = 2.87853409 AU Perihelion dist = 2.00335865 AU Mag: H = 9.80, G = 0.15 Epoch of elements : MJD 56283.61400000 TDT (2012 Dec 22.614) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Dec 22 217 Eudora 14h 44.4m UT 12.5 4 31 59.502 6 44 43.322UCAC 34047471 0.0 14.4 68 5.8 2.127 -1.823 3.09 115.3313 6.744 -41.39 -23.43 14.7405 -0.07132 -0.64080 -6.57354 0.74655 0.00218 0.00177 2000 82.29656120121219.00000154.822104162.955021 10.4551110.30403511 2.8785341 2.0033587 9.8 5.00.15 RATE 2.0181200 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.033 0.032 359 1.75 0.033 0 0-5-1 056278.0020121222_047471 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Dec 16, 19:07 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org