IOTA/IOTA-ES occultation update for (167) Urda / TYC 1268-00718-1 event on 2012 Nov 24, 11:38 UT Visible from New Zealand, Tasmania Summary ------- On 2012 Nov 24 UT, the 38 km diameter asteroid (167) Urda will occult a 12.0 mag star in the constellation Taurus for observers along a path across New Zealand, Tasmania. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.4 mag to 13.1 mag (the magnitude of the asteroid) for at most 3.0 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: 52 * date and approx. time of event: 2012 Nov 24, 11:33 - 2012 Nov 24, 11:44 UT * geocentric midpoint of event [JD]: 2456255.98549167 * magnitude of target star: 12.0 * magnitude drop [mag]: 1.4 * estimated maximum duration [s]: 3.0 * Moon: 86 % sunlit, 49° distance * Sun: 175° distance * rough path description: New Zealand, Tasmania The occultation path -------------------- * approximate projected width [km]: 55 * 1 sigma uncertainty interval [path widths]: +/- 1.23 * 1 sigma uncertainty interval [seconds]: +/- 4.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .045 +/- .033) * 1 sigma uncertainty ellipse (major, minor, PA): ( .045", .033", 87° ) * approx speed of asteroid's shadow [km/s]: 12.8525 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1268-00718-1 by 167 Urda on 2012 Nov 24 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 122 0 0 -53 1 35 11 44 45 0 58 -1 -52 43 54 -53 19 23 .. .. .. .. .. .. 123 0 0 -52 39 21 11 44 45 1 58 -1 -52 21 39 -52 57 9 .. .. .. -53 41 27 124 0 0 -52 16 54 11 44 45 2 57 -2 -51 59 13 -52 34 43 .. .. .. -53 19 2 125 0 0 -51 54 16 11 44 45 2 56 -3 -51 36 34 -52 12 4 .. .. .. -52 56 24 126 0 0 -51 31 26 11 44 44 3 55 -4 -51 13 44 -51 49 14 .. .. .. -52 33 34 127 0 0 -51 8 25 11 44 44 4 54 -4 -50 50 43 -51 26 13 -50 7 39 -52 10 32 128 0 0 -50 45 13 11 44 43 5 54 -5 -50 27 32 -51 3 2 -49 44 28 -51 47 20 129 0 0 -50 21 52 11 44 42 5 53 -6 -50 4 11 -50 39 40 -49 21 8 -51 23 58 130 0 0 -49 58 22 11 44 41 6 52 -7 -49 40 41 -50 16 9 -48 57 40 -51 0 26 131 0 0 -49 34 43 11 44 40 7 51 -7 -49 17 3 -49 52 30 -48 34 3 -50 36 45 132 0 0 -49 10 56 11 44 39 8 51 -8 -48 53 17 -49 28 42 -48 10 19 -50 12 55 133 0 0 -48 47 2 11 44 38 8 50 -9 -48 29 24 -49 4 48 -47 46 28 -49 48 59 134 0 0 -48 23 2 11 44 36 9 49 -10 -48 5 24 -48 40 46 -47 22 30 -49 24 55 135 0 0 -47 58 56 11 44 35 10 48 -10 -47 41 19 -48 16 39 -46 58 28 -49 0 44 136 0 0 -47 34 44 11 44 33 11 48 -11 -47 17 9 -47 52 26 -46 34 21 -48 36 29 137 0 0 -47 10 28 11 44 31 11 47 -12 -46 52 54 -47 28 9 -46 10 9 -48 12 8 138 0 0 -46 46 9 11 44 29 12 46 -13 -46 28 36 -47 3 48 -45 45 54 -47 47 43 139 0 0 -46 21 46 11 44 27 13 45 -13 -46 4 15 -46 39 24 -45 21 37 -47 23 15 140 0 0 -45 57 21 11 44 24 14 44 -14 -45 39 52 -46 14 58 -44 57 18 -46 58 45 141 0 0 -45 32 55 11 44 22 15 44 -15 -45 15 27 -45 50 29 -44 32 57 -46 34 12 142 0 0 -45 8 28 11 44 19 15 43 -16 -44 51 2 -45 26 1 -44 8 36 -46 9 39 143 0 0 -44 44 1 11 44 17 16 42 -16 -44 26 37 -45 1 31 -43 44 16 -45 45 5 144 0 0 -44 19 35 11 44 14 17 41 -17 -44 2 13 -44 37 3 -43 19 56 -45 20 31 145 0 0 -43 55 10 11 44 11 18 41 -18 -43 37 50 -44 12 36 -42 55 38 -44 55 59 146 0 0 -43 30 47 11 44 7 18 40 -18 -43 13 29 -43 48 11 -42 31 23 -44 31 28 147 0 0 -43 6 27 11 44 4 19 39 -19 -42 49 12 -43 23 49 -42 7 11 -44 7 0 148 0 0 -42 42 11 11 44 1 20 38 -20 -42 24 58 -42 59 31 -41 43 3 -43 42 36 149 0 0 -42 18 0 11 43 57 21 38 -21 -42 0 49 -42 35 17 -41 18 59 -43 18 16 150 0 0 -41 53 53 11 43 53 21 37 -21 -41 36 45 -42 11 8 -40 55 1 -42 54 1 151 0 0 -41 29 53 11 43 49 22 36 -22 -41 12 47 -41 47 5 -40 31 9 -42 29 51 152 0 0 -41 5 59 11 43 45 23 35 -23 -40 48 55 -41 23 8 -40 7 23 -42 5 48 153 0 0 -40 42 12 11 43 41 24 34 -24 -40 25 11 -40 59 19 -39 43 45 -41 41 52 154 0 0 -40 18 33 11 43 37 24 34 -24 -40 1 35 -40 35 38 -39 20 16 -41 18 4 155 0 0 -39 55 4 11 43 32 25 33 -25 -39 38 8 -40 12 5 -38 56 55 -40 54 25 156 0 0 -39 31 43 11 43 27 26 32 -26 -39 14 50 -39 48 42 -38 33 43 -40 30 54 157 0 0 -39 8 33 11 43 23 27 31 -26 -38 51 43 -39 25 29 -38 10 42 -40 7 34 158 0 0 -38 45 33 11 43 18 27 30 -27 -38 28 46 -39 2 26 -37 47 52 -39 44 25 159 0 0 -38 22 45 11 43 13 28 29 -28 -38 6 0 -38 39 35 -37 25 13 -39 21 26 160 0 0 -38 0 8 11 43 8 29 28 -28 -37 43 27 -38 16 56 -37 2 46 -38 58 40 161 0 0 -37 37 45 11 43 2 29 28 -29 -37 21 6 -37 54 29 -36 40 32 -38 36 6 162 0 0 -37 15 34 11 42 57 30 27 -29 -36 58 58 -37 32 16 -36 18 31 -38 13 46 163 0 0 -36 53 38 11 42 51 31 26 -30 -36 37 4 -37 10 17 -35 56 44 -37 51 39 164 0 0 -36 31 55 11 42 46 32 25 -31 -36 15 25 -36 48 31 -35 35 11 -37 29 47 165 0 0 -36 10 28 11 42 40 32 24 -31 -35 54 0 -36 27 1 -35 13 53 -37 8 9 166 0 0 -35 49 16 11 42 34 33 23 -32 -35 32 51 -36 5 47 -34 52 51 -36 46 47 167 0 0 -35 28 21 11 42 28 33 22 -32 -35 11 59 -35 44 48 -34 32 5 -36 25 42 168 0 0 -35 7 42 11 42 22 34 21 -33 -34 51 22 -35 24 6 -34 11 35 -36 4 53 169 0 0 -34 47 20 11 42 16 35 20 -33 -34 31 3 -35 3 42 -33 51 23 -35 44 21 170 0 0 -34 27 15 11 42 10 35 19 -34 -34 11 1 -34 43 34 -33 31 28 -35 24 6 171 0 0 -34 7 29 11 42 3 36 18 -34 -33 51 18 -34 23 45 -33 11 51 -35 4 10 172 0 0 -33 48 1 11 41 57 36 17 -35 -33 31 53 -34 4 15 -32 52 32 -34 44 33 173 0 0 -33 28 52 11 41 50 37 16 -35 -33 12 47 -33 45 3 -32 33 32 -34 25 14 174 0 0 -33 10 3 11 41 43 37 15 -36 -32 54 0 -33 26 11 -32 14 52 -34 6 15 175 0 0 -32 51 33 11 41 37 38 14 -36 -32 35 33 -33 7 39 -31 56 31 -33 47 37 176 0 0 -32 33 24 11 41 30 38 13 -37 -32 17 26 -32 49 27 -31 38 31 -33 29 18 177 0 0 -32 15 35 11 41 23 39 12 -37 -31 59 40 -32 31 36 -31 20 50 -33 11 20 178 0 0 -31 58 8 11 41 16 39 10 -37 -31 42 15 -32 14 5 -31 3 31 -32 53 43 179 0 0 -31 41 1 11 41 9 40 9 -38 -31 25 11 -31 56 57 -30 46 33 -32 36 28 180 0 0 -31 24 17 11 41 2 40 8 -38 -31 8 29 -31 40 10 -30 29 57 -32 19 35 -179 0 0 -31 7 54 11 40 55 40 7 -38 -30 52 9 -31 23 45 -30 13 42 -32 3 4 -178 0 0 -30 51 54 11 40 48 41 6 -39 -30 36 11 -31 7 42 -29 57 50 -31 46 56 -177 0 0 -30 36 17 11 40 40 41 5 -39 -30 20 36 -30 52 2 -29 42 20 -31 31 10 -176 0 0 -30 21 2 11 40 33 41 3 -39 -30 5 23 -30 36 46 -29 27 14 -31 15 48 -175 0 0 -30 6 11 11 40 26 42 2 -39 -29 50 34 -30 21 52 -29 12 30 -31 0 49 -174 0 0 -29 51 44 11 40 18 42 1 -39 -29 36 9 -30 7 23 -28 58 10 -30 46 14 -173 0 0 -29 37 40 11 40 11 42 360 -40 -29 22 7 -29 53 17 -28 44 13 -30 32 3 -172 0 0 -29 24 0 11 40 4 42 358 -40 -29 8 30 -29 39 35 -28 30 40 -30 18 16 -171 0 0 -29 10 45 11 39 56 43 357 -40 -28 55 17 -29 26 18 -28 17 32 -30 4 54 -170 0 0 -28 57 55 11 39 49 43 356 -40 -28 42 28 -29 13 26 -28 4 47 -29 51 57 -169 0 0 -28 45 29 11 39 41 43 355 -40 -28 30 4 -29 0 58 -27 52 28 -29 39 24 -168 0 0 -28 33 28 11 39 34 43 353 -40 -28 18 5 -28 48 56 -27 40 33 -29 27 17 -167 0 0 -28 21 53 11 39 26 43 352 -40 -28 6 31 -28 37 18 -27 29 3 -29 15 36 -166 0 0 -28 10 42 11 39 18 43 351 -40 -27 55 23 -28 26 7 -27 17 59 -29 4 20 -165 0 0 -27 59 58 11 39 11 43 350 -40 -27 44 40 -28 15 21 -27 7 20 -28 53 29 -164 0 0 -27 49 39 11 39 3 43 348 -40 -27 34 23 -28 5 0 -26 57 6 -28 43 5 -163 0 0 -27 39 47 11 38 56 43 347 -40 -27 24 32 -27 55 6 -26 47 18 -28 33 8 -162 0 0 -27 30 20 11 38 48 43 346 -40 -27 15 6 -27 45 38 -26 37 57 -28 23 36 -161 0 0 -27 21 20 11 38 41 43 344 -39 -27 6 7 -27 36 37 -26 29 1 -28 14 31 -160 0 0 -27 12 46 11 38 33 43 343 -39 -26 57 35 -27 28 2 -26 20 31 -28 5 53 -159 0 0 -27 4 39 11 38 26 43 342 -39 -26 49 29 -27 19 53 -26 12 28 -27 57 41 -158 0 0 -26 56 58 11 38 18 43 341 -39 -26 41 49 -27 12 12 -26 4 51 -27 49 57 -157 0 0 -26 49 45 11 38 11 43 340 -38 -26 34 37 -27 4 57 -25 57 41 -27 42 40 -156 0 0 -26 42 58 11 38 3 42 338 -38 -26 27 51 -26 58 9 -25 50 58 -27 35 49 -155 0 0 -26 36 38 11 37 56 42 337 -38 -26 21 32 -26 51 49 -25 44 41 -27 29 27 -154 0 0 -26 30 46 11 37 48 42 336 -38 -26 15 41 -26 45 55 -25 38 52 -27 23 31 -153 0 0 -26 25 21 11 37 41 42 335 -37 -26 10 16 -26 40 29 -25 33 29 -27 18 3 -152 0 0 -26 20 23 11 37 34 41 334 -37 -26 5 19 -26 35 31 -25 28 34 -27 13 3 -151 0 0 -26 15 53 11 37 27 41 332 -37 -26 0 50 -26 31 0 -25 24 6 -27 8 31 -150 0 0 -26 11 50 11 37 19 41 331 -36 -25 56 47 -26 26 57 -25 20 5 -27 4 26 -149 0 0 -26 8 15 11 37 12 40 330 -36 -25 53 13 -26 23 21 -25 16 31 -27 0 49 -148 0 0 -26 5 7 11 37 5 40 329 -35 -25 50 6 -26 20 13 -25 13 25 -26 57 40 -147 0 0 -26 2 28 11 36 58 39 328 -35 -25 47 26 -26 17 33 -25 10 47 -26 54 59 -146 0 0 -26 0 16 11 36 51 39 327 -34 -25 45 15 -26 15 21 -25 8 36 -26 52 46 -145 0 0 -25 58 32 11 36 44 39 326 -34 -25 43 31 -26 13 37 -25 6 52 -26 51 2 -144 0 0 -25 57 16 11 36 37 38 325 -33 -25 42 15 -26 12 21 -25 5 36 -26 49 45 -143 0 0 -25 56 28 11 36 31 38 324 -33 -25 41 27 -26 11 33 -25 4 49 -26 48 57 -142 0 0 -25 56 8 11 36 24 37 323 -32 -25 41 7 -26 11 13 -25 4 28 -26 48 37 -141 0 0 -25 56 16 11 36 17 36 322 -32 -25 41 15 -26 11 21 -25 4 36 -26 48 46 -140 0 0 -25 56 52 11 36 11 36 321 -31 -25 41 51 -26 11 57 -25 5 11 -26 49 22 -139 0 0 -25 57 56 11 36 4 35 320 -30 -25 42 54 -26 13 1 -25 6 15 -26 50 27 -138 0 0 -25 59 28 11 35 58 35 319 -30 -25 44 26 -26 14 34 -25 7 46 -26 52 1 -137 0 0 -26 1 28 11 35 52 34 319 -29 -25 46 26 -26 16 35 -25 9 45 -26 54 2 -136 0 0 -26 3 57 11 35 45 34 318 -29 -25 48 54 -26 19 3 -25 12 11 -26 56 33 -135 0 0 -26 6 53 11 35 39 33 317 -28 -25 51 50 -26 22 1 -25 15 6 -26 59 31 -134 0 0 -26 10 18 11 35 33 32 316 -27 -25 55 14 -26 25 26 -25 18 29 -27 2 58 -133 0 0 -26 14 11 11 35 28 32 315 -27 -25 59 6 -26 29 19 -25 22 19 -27 6 53 -132 0 0 -26 18 32 11 35 22 31 315 -26 -26 3 26 -26 33 41 -25 26 37 -27 11 17 -131 0 0 -26 23 20 11 35 16 30 314 -25 -26 8 14 -26 38 31 -25 31 23 -27 16 9 -130 0 0 -26 28 37 11 35 11 30 313 -24 -26 13 30 -26 43 49 -25 36 37 -27 21 29 -129 0 0 -26 34 22 11 35 5 29 312 -24 -26 19 14 -26 49 34 -25 42 19 -27 27 17 -128 0 0 -26 40 35 11 35 0 28 312 -23 -26 25 26 -26 55 48 -25 48 28 -27 33 34 -127 0 0 -26 47 16 11 34 55 27 311 -22 -26 32 6 -27 2 30 -25 55 5 -27 40 19 -126 0 0 -26 54 24 11 34 50 27 310 -22 -26 39 13 -27 9 40 -26 2 9 -27 47 32 -125 0 0 -27 2 1 11 34 45 26 310 -21 -26 46 48 -27 17 18 -26 9 41 -27 55 12 -124 0 0 -27 10 5 11 34 40 25 309 -20 -26 54 51 -27 25 23 -26 17 40 -28 3 21 -123 0 0 -27 18 36 11 34 35 24 308 -19 -27 3 21 -27 33 56 -26 26 7 -28 11 58 -122 0 0 -27 27 35 11 34 31 24 308 -18 -27 12 18 -27 42 56 -26 35 1 -28 21 2 -121 0 0 -27 37 1 11 34 26 23 307 -18 -27 21 43 -27 52 24 -26 44 22 -28 30 34 -120 0 0 -27 46 55 11 34 22 22 306 -17 -27 31 35 -28 2 20 -26 54 10 -28 40 34 -119 0 0 -27 57 16 11 34 18 21 306 -16 -27 41 54 -28 12 42 -27 4 25 -28 51 0 -118 0 0 -28 8 4 11 34 14 20 305 -15 -27 52 40 -28 23 32 -27 15 7 -29 1 55 -117 0 0 -28 19 19 11 34 10 20 305 -14 -28 3 53 -28 34 49 -27 26 16 -29 13 16 -116 0 0 -28 31 0 11 34 6 19 304 -14 -28 15 33 -28 46 32 -27 37 51 -29 25 4 -115 0 0 -28 43 8 11 34 3 18 303 -13 -28 27 39 -28 58 42 -27 49 52 -29 37 19 -114 0 0 -28 55 43 11 33 59 17 303 -12 -28 40 12 -29 11 19 -28 2 20 -29 50 1 -113 0 0 -29 8 43 11 33 56 16 302 -11 -28 53 10 -29 24 21 -28 15 14 -30 3 9 -112 0 0 -29 22 10 11 33 53 15 302 -10 -29 6 35 -29 37 50 -28 28 33 -30 16 43 -111 0 0 -29 36 3 11 33 50 15 301 -9 -29 20 25 -29 51 45 -28 42 18 -30 30 44 -110 0 0 -29 50 21 11 33 47 14 301 -8 -29 34 41 -30 6 5 -28 56 28 -30 45 10 -109 0 0 -30 5 4 11 33 45 13 300 -8 -29 49 22 -30 20 51 -29 11 4 -31 0 1 -108 0 0 -30 20 12 11 33 42 12 300 -7 -30 4 28 -30 36 2 -29 26 4 -31 15 18 -107 0 0 -30 35 46 11 33 40 11 299 -6 -30 19 59 -30 51 37 -29 41 29 -31 31 0 -106 0 0 -30 51 43 11 33 38 10 298 -5 -30 35 54 -31 7 38 -29 57 19 -31 47 7 -105 0 0 -31 8 5 11 33 36 9 298 -4 -30 52 13 -31 24 2 -30 13 32 -32 3 38 -104 0 0 -31 24 51 11 33 34 8 297 -3 -31 8 57 -31 40 51 -30 30 9 -32 20 33 -103 0 0 -31 42 1 11 33 33 8 297 -2 -31 26 4 -31 58 3 -30 47 10 -32 37 52 -102 0 0 -31 59 33 11 33 31 7 296 -1 -31 43 34 -32 15 38 -31 4 34 -32 55 34 -101 0 0 -32 17 29 11 33 30 6 296 0 -32 1 27 -32 33 37 -31 22 20 -33 13 39 Uncertainty in time = +/- 5 secs Prediction of 2012 Nov 16.0 Data for the target star ------------------------ * name: TYC 1268-00718-1 * constellation : Taurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 04 21 47.0027 DE: +18 12 09.639 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .038, .030 ) * V mag [mag]: 12.0 * B mag [mag]: 13.1 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (167) Urda approx. diameter [km]: 38 approx. diameter ["]: .027 distance from Earth [AU]: 1.93000 * orbital information: orbit source: Preston date of fit: 2012 Oct 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1320 number of rejected observations: 134 time covered by the observations: 1905 Aug 23 - 2012 Oct 19 1 sigma uncertainty ellipse (major, minor, PA): 0.025, 0.013, 81° remarks: * orbital elements for (167) Urda : Mean anomaly = 124.18243040 deg Arg. of pericenter = 131.56655978 deg Long. of node = 166.37507156 deg Inclination = 2.20960564 deg Eccentricity = 0.03397251 Semimajor axis = 2.85737371 AU Perihelion dist = 2.76030155 AU Mag: H = 9.14, G = 0.15 Epoch of elements : MJD 56255.48500000 TDT (2012 Nov 24.485) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 24 167 Urda 11h 39.1m UT 12.0 4 21 47.003 18 12 9.64TYC 1268-00718-1 13.1 13.1 38 3.0 1.930 -2.282 -5.99 -173.1648 18.203 1.93 -20.68 11.6518 0.13157 -0.71539 -7.13416 -1.31473 -0.00047 0.00026 2000 123.06317220121119.00000131.566560166.375072 2.2096060.03397251 2.8573737 2.7603016 9.1 5.00.15 RATE 2.0405800 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.045 0.033 87 2.23 0.033 0 0-3-1 056247.0020121124_0718-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 25, 21:58 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org