IOTA/IOTA-ES occultation update for (643) Scheherezade / TYC 1833-00974-1 event on 2012 Nov 04, 10:14 UT Visible from Canada Summary ------- On 2012 Nov 04 UT, the 71 km diameter asteroid (643) Scheherezade will occult a 10.5 mag star in the constellation Taurus for observers along a path across Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.3 mag to 14.7 mag (the magnitude of the asteroid) for at most 6.4 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: 79 * date and approx. time of event: 2012 Nov 04, 10:07 - 2012 Nov 04, 10:23 UT * geocentric midpoint of event [JD]: 2456235.9270625 * magnitude of target star: 10.5 * magnitude drop [mag]: 4.3 * estimated maximum duration [s]: 6.4 * Moon: 74 % sunlit, 35° distance * Sun: 152° distance * rough path description: Canada The occultation path -------------------- * approximate projected width [km]: 77 * 1 sigma uncertainty interval [path widths]: +/- 0.69 * 1 sigma uncertainty interval [seconds]: +/- 5.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .040 +/- .025) * 1 sigma uncertainty ellipse (major, minor, PA): ( .040", .025", 94° ) * approx speed of asteroid's shadow [km/s]: 11.0972 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1833-00974-1 by 643 Scheherezade on 2012 Nov 4 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 139 0 0 - 1 54 34 10 23 46 0 64 -27 - 1 31 27 - 2 17 38 - 0 59 25 .. .. .. 140 0 0 - 1 25 17 10 23 46 1 64 -28 - 1 2 3 - 1 48 26 - 0 29 54 - 2 20 15 141 0 0 - 0 55 21 10 23 45 3 64 -30 - 0 32 2 - 1 18 35 0 0 16 - 1 50 33 142 0 0 - 0 24 47 10 23 45 4 64 -31 - 0 1 23 - 0 48 8 0 31 3 - 1 20 13 143 0 0 0 6 23 10 23 44 5 64 -32 0 29 53 - 0 17 3 1 2 27 - 0 49 16 144 0 0 0 38 10 10 23 43 6 64 -33 1 1 47 0 14 39 1 34 28 - 0 17 42 145 0 0 1 10 34 10 23 41 7 64 -34 1 34 16 0 46 57 2 7 6 0 14 28 146 0 0 1 43 33 10 23 40 8 65 -35 2 7 21 1 19 50 2 40 19 0 47 13 147 0 0 2 17 7 10 23 38 9 65 -36 2 41 1 1 53 18 3 14 7 1 20 34 148 0 0 2 51 16 10 23 36 10 65 -37 3 15 15 2 27 21 3 48 30 1 54 28 149 0 0 3 25 58 10 23 33 12 65 -38 3 50 3 3 1 57 4 23 26 2 28 56 150 0 0 4 1 13 10 23 31 13 65 -40 4 25 24 3 37 6 4 58 55 3 3 58 151 0 0 4 37 0 10 23 28 14 65 -41 5 1 17 4 12 48 5 34 56 3 39 31 152 0 0 5 13 18 10 23 25 15 65 -42 5 37 41 4 49 0 6 11 29 4 15 36 153 0 0 5 50 7 10 23 21 16 65 -43 6 14 36 5 25 43 6 48 32 4 52 11 154 0 0 6 27 26 10 23 18 17 65 -44 6 52 0 6 2 56 7 26 4 5 29 16 155 0 0 7 5 13 10 23 14 18 65 -45 7 29 53 6 40 37 8 4 5 6 6 50 156 0 0 7 43 27 10 23 10 20 66 -46 8 8 14 7 18 46 8 42 33 6 44 51 157 0 0 8 22 9 10 23 5 21 66 -47 8 47 1 7 57 22 9 21 28 7 23 19 158 0 0 9 1 15 10 23 0 22 66 -48 9 26 13 8 36 23 10 0 48 8 2 12 159 0 0 9 40 46 10 22 56 23 66 -49 10 5 49 9 15 49 10 40 33 8 41 31 160 0 0 10 20 40 10 22 50 24 67 -51 10 45 49 9 55 38 11 20 40 9 21 12 161 0 0 11 0 57 10 22 45 25 67 -52 11 26 10 10 35 48 12 1 9 10 1 16 162 0 0 11 41 33 10 22 40 26 67 -53 12 6 52 11 16 20 12 41 58 10 41 40 163 0 0 12 22 29 10 22 34 28 67 -54 12 47 54 11 57 11 13 23 6 11 22 24 164 0 0 13 3 44 10 22 28 29 68 -55 13 29 13 12 38 20 14 4 33 12 3 27 165 0 0 13 45 15 10 22 21 30 68 -56 14 10 49 13 19 46 14 46 15 12 44 47 166 0 0 14 27 1 10 22 15 31 69 -57 14 52 40 14 1 28 15 28 13 13 26 22 167 0 0 15 9 1 10 22 8 32 69 -58 15 34 44 14 43 24 16 10 24 14 8 11 168 0 0 15 51 14 10 22 1 33 70 -59 16 17 1 15 25 32 16 52 47 14 50 14 169 0 0 16 33 37 10 21 54 34 70 -60 16 59 29 16 7 51 17 35 21 15 32 27 170 0 0 17 16 10 10 21 47 36 71 -61 17 42 6 16 50 20 18 18 4 16 14 51 171 0 0 17 58 51 10 21 39 37 71 -62 18 24 51 17 32 57 19 0 54 16 57 23 172 0 0 18 41 38 10 21 32 38 72 -63 19 7 42 18 15 41 19 43 50 17 40 1 173 0 0 19 24 31 10 21 24 39 72 -63 19 50 38 18 58 30 20 26 51 18 22 45 174 0 0 20 7 26 10 21 16 40 73 -64 20 33 37 19 41 22 21 9 55 19 5 33 175 0 0 20 50 24 10 21 8 41 74 -65 21 16 37 20 24 16 21 52 59 19 48 23 176 0 0 21 33 21 10 20 59 42 74 -66 21 59 37 21 7 11 22 36 4 20 31 14 177 0 0 22 16 17 10 20 51 43 75 -67 22 42 36 21 50 4 23 19 6 21 14 4 178 0 0 22 59 10 10 20 42 44 76 -67 23 25 32 22 32 55 24 2 5 21 56 52 179 0 0 23 41 59 10 20 34 45 77 -68 24 8 23 23 15 42 24 44 59 22 39 36 180 0 0 24 24 42 10 20 25 46 78 -69 24 51 8 23 58 23 25 27 47 23 22 14 -179 0 0 25 7 17 10 20 16 47 79 -69 25 33 44 24 40 56 26 10 26 24 4 45 -178 0 0 25 49 43 10 20 7 48 80 -70 26 16 12 25 23 21 26 52 56 24 47 8 -177 0 0 26 31 59 10 19 58 49 81 -70 26 58 29 26 5 36 27 35 15 25 29 21 -176 0 0 27 14 3 10 19 48 50 82 -70 27 40 34 26 47 39 28 17 21 26 11 23 -175 0 0 27 55 53 10 19 39 51 83 -71 28 22 25 27 29 28 28 59 13 26 53 12 -174 0 0 28 37 29 10 19 30 52 84 -71 29 4 1 28 11 4 29 40 49 27 34 46 -173 0 0 29 18 49 10 19 20 53 85 -71 29 45 21 28 52 23 30 22 9 28 16 6 -172 0 0 29 59 51 10 19 11 54 87 -71 30 26 23 29 33 25 31 3 11 28 57 8 -171 0 0 30 40 34 10 19 1 55 88 -71 31 7 6 30 14 9 31 43 54 29 37 53 -170 0 0 31 20 58 10 18 52 55 90 -71 31 47 29 30 54 33 32 24 16 30 18 18 -169 0 0 32 1 0 10 18 42 56 91 -71 32 27 30 31 34 37 33 4 16 30 58 22 -168 0 0 32 40 40 10 18 33 57 93 -71 33 7 9 32 14 18 33 43 54 31 38 5 -167 0 0 33 19 57 10 18 23 58 94 -71 33 46 25 32 53 36 34 23 7 32 17 26 -166 0 0 33 58 50 10 18 14 58 96 -70 34 25 16 33 32 31 35 1 56 32 56 22 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18 -151 0 0 42 44 15 10 15 55 66 129 -62 43 9 49 42 18 48 43 45 17 41 43 49 -150 0 0 43 15 1 10 15 47 66 131 -61 43 40 30 42 49 38 44 15 51 42 14 46 -149 0 0 43 45 13 10 15 38 66 134 -61 44 10 37 43 19 55 44 45 51 42 45 10 -148 0 0 44 14 51 10 15 29 66 136 -60 44 40 10 43 49 38 45 15 17 43 15 0 -147 0 0 44 43 55 10 15 21 66 139 -59 45 9 9 44 18 48 45 44 8 43 44 16 -146 0 0 45 12 26 10 15 13 66 141 -59 45 37 34 44 47 23 46 12 25 44 12 59 -145 0 0 45 40 22 10 15 4 66 144 -58 46 5 24 45 15 25 46 40 8 44 41 8 -144 0 0 46 7 44 10 14 56 66 147 -57 46 32 41 45 42 52 47 7 17 45 8 43 -143 0 0 46 34 32 10 14 48 66 149 -57 46 59 23 46 9 46 47 33 51 45 35 44 -142 0 0 47 0 46 10 14 40 66 152 -56 47 25 32 46 36 6 47 59 52 46 2 12 -141 0 0 47 26 27 10 14 32 66 154 -55 47 51 7 47 1 52 48 25 19 46 28 6 -140 0 0 47 51 34 10 14 25 66 157 -55 48 16 8 47 27 5 48 50 12 46 53 26 -139 0 0 48 16 8 10 14 17 66 159 -54 48 40 36 47 51 44 49 14 32 47 18 14 -138 0 0 48 40 8 10 14 9 66 162 -53 49 4 31 48 15 51 49 38 18 47 42 28 -137 0 0 49 3 36 10 14 2 66 164 -53 49 27 53 48 39 24 50 1 32 48 6 9 -136 0 0 49 26 31 10 13 55 65 166 -52 49 50 42 49 2 25 50 24 13 48 29 18 -135 0 0 49 48 53 10 13 47 65 169 -51 50 12 58 49 24 53 50 46 21 48 51 54 -134 0 0 50 10 43 10 13 40 65 171 -51 50 34 43 49 46 49 51 7 57 49 13 58 -133 0 0 50 32 2 10 13 33 65 173 -50 50 55 55 50 8 14 51 29 2 49 35 30 -132 0 0 50 52 49 10 13 26 64 175 -49 51 16 36 50 29 6 51 49 34 49 56 31 -131 0 0 51 13 4 10 13 19 64 177 -49 51 36 46 50 49 28 52 9 36 50 17 0 -130 0 0 51 32 49 10 13 12 64 179 -48 51 56 25 51 9 18 52 29 7 50 36 58 -129 0 0 51 52 3 10 13 6 64 181 -47 52 15 33 51 28 38 52 48 7 50 56 26 -128 0 0 52 10 47 10 12 59 63 183 -47 52 34 11 51 47 27 53 6 37 51 15 23 -127 0 0 52 29 1 10 12 52 63 185 -46 52 52 19 52 5 47 53 24 37 51 33 50 -126 0 0 52 46 45 10 12 46 63 187 -45 53 9 58 52 23 36 53 42 8 51 51 47 -125 0 0 53 4 0 10 12 40 62 189 -45 53 27 7 52 40 57 53 59 10 52 9 15 -124 0 0 53 20 46 10 12 33 62 191 -44 53 43 48 52 57 48 54 15 43 52 26 14 -123 0 0 53 37 3 10 12 27 61 192 -44 54 0 0 53 14 11 54 31 47 52 42 44 -122 0 0 53 52 53 10 12 21 61 194 -43 54 15 44 53 30 6 54 47 24 52 58 46 -121 0 0 54 8 14 10 12 15 61 196 -42 54 31 0 53 45 32 55 2 33 53 14 20 -120 0 0 54 23 8 10 12 9 60 197 -42 54 45 49 54 0 31 55 17 14 53 29 26 -119 0 0 54 37 35 10 12 3 60 199 -41 55 0 10 54 15 3 55 31 29 53 44 4 -118 0 0 54 51 34 10 11 58 59 201 -41 55 14 5 54 29 8 55 45 17 53 58 16 -117 0 0 55 5 8 10 11 52 59 202 -40 55 27 34 54 42 46 55 58 38 54 12 0 -116 0 0 55 18 15 10 11 46 59 204 -39 55 40 36 54 55 58 56 11 34 54 25 19 -115 0 0 55 30 56 10 11 41 58 205 -39 55 53 13 55 8 44 56 24 4 54 38 11 -114 0 0 55 43 12 10 11 35 58 207 -38 56 5 24 55 21 4 56 36 9 54 50 37 -113 0 0 55 55 3 10 11 30 57 208 -38 56 17 10 55 32 59 56 47 49 55 2 38 -112 0 0 56 6 28 10 11 25 57 209 -37 56 28 31 55 44 29 56 59 4 55 14 14 -111 0 0 56 17 29 10 11 19 56 211 -37 56 39 28 55 55 34 57 9 55 55 25 25 -110 0 0 56 28 6 10 11 14 56 212 -36 56 50 1 56 6 15 57 20 22 55 36 12 -109 0 0 56 38 19 10 11 9 56 214 -35 57 0 9 56 16 31 57 30 25 55 46 34 -108 0 0 56 48 7 10 11 4 55 215 -35 57 9 54 56 26 24 57 40 4 55 56 31 -107 0 0 56 57 33 10 10 59 55 216 -34 57 19 16 56 35 53 57 49 21 56 6 6 -106 0 0 57 6 35 10 10 54 54 218 -34 57 28 15 56 44 59 57 58 14 56 15 16 -105 0 0 57 15 14 10 10 49 54 219 -33 57 36 50 56 53 42 58 6 45 56 24 4 -104 0 0 57 23 30 10 10 44 53 220 -33 57 45 3 57 2 1 58 14 53 56 32 28 -103 0 0 57 31 24 10 10 39 53 221 -32 57 52 54 57 9 58 58 22 39 56 40 29 -102 0 0 57 38 56 10 10 35 53 223 -32 58 0 22 57 17 33 58 30 4 56 48 8 -101 0 0 57 46 6 10 10 30 52 224 -31 58 7 29 57 24 46 58 37 6 56 55 25 -100 0 0 57 52 53 10 10 26 52 225 -31 58 14 14 57 31 36 58 43 47 57 2 19 - 99 0 0 57 59 19 10 10 21 51 226 -30 58 20 37 57 38 5 58 50 6 57 8 52 - 98 0 0 58 5 24 10 10 16 51 227 -29 58 26 39 57 44 12 58 56 5 57 15 2 - 97 0 0 58 11 7 10 10 12 50 229 -29 58 32 20 57 49 57 59 1 42 57 20 51 - 96 0 0 58 16 29 10 10 8 50 230 -28 58 37 39 57 55 22 59 6 58 57 26 18 - 95 0 0 58 21 30 10 10 3 49 231 -28 58 42 38 58 0 25 59 11 54 57 31 25 - 94 0 0 58 26 10 10 9 59 49 232 -27 58 47 16 58 5 7 59 16 29 57 36 9 - 93 0 0 58 30 29 10 9 55 48 233 -27 58 51 34 58 9 28 59 20 44 57 40 33 - 92 0 0 58 34 28 10 9 50 48 234 -26 58 55 31 58 13 29 59 24 39 57 44 36 - 91 0 0 58 38 7 10 9 46 48 235 -26 58 59 8 58 17 9 59 28 14 57 48 19 - 90 0 0 58 41 25 10 9 42 47 236 -25 59 2 24 58 20 28 59 31 28 57 51 40 - 89 0 0 58 44 22 10 9 38 47 238 -25 59 5 21 58 23 28 59 34 23 57 54 41 - 88 0 0 58 47 0 10 9 34 46 239 -24 59 7 57 58 26 6 59 36 57 57 57 21 - 87 0 0 58 49 17 10 9 30 46 240 -24 59 10 13 58 28 25 59 39 12 57 59 41 - 86 0 0 58 51 15 10 9 26 45 241 -23 59 12 10 58 30 23 59 41 7 58 1 41 - 85 0 0 58 52 52 10 9 22 45 242 -23 59 13 46 58 32 1 59 42 43 58 3 20 - 84 0 0 58 54 10 10 9 18 44 243 -22 59 15 3 58 33 19 59 43 59 58 4 39 - 83 0 0 58 55 7 10 9 14 44 244 -22 59 16 0 58 34 17 59 44 55 58 5 37 - 82 0 0 58 55 45 10 9 10 43 245 -21 59 16 37 58 34 55 59 45 32 58 6 16 - 81 0 0 58 56 2 10 9 6 43 246 -21 59 16 55 58 35 13 59 45 49 58 6 34 - 80 0 0 58 56 0 10 9 3 43 247 -20 59 16 53 58 35 11 59 45 47 58 6 32 - 79 0 0 58 55 38 10 8 59 42 248 -20 59 16 31 58 34 49 59 45 25 58 6 10 - 78 0 0 58 54 56 10 8 55 42 249 -19 59 15 49 58 34 6 59 44 43 58 5 27 - 77 0 0 58 53 54 10 8 51 41 250 -19 59 14 47 58 33 4 59 43 42 58 4 24 - 76 0 0 58 52 32 10 8 48 41 251 -18 59 13 26 58 31 42 59 42 21 58 3 1 - 75 0 0 58 50 50 10 8 44 40 252 -18 59 11 44 58 29 59 59 40 41 58 1 18 - 74 0 0 58 48 48 10 8 41 40 253 -17 59 9 43 58 27 56 59 38 41 57 59 14 - 73 0 0 58 46 26 10 8 37 39 254 -17 59 7 22 58 25 33 59 36 21 57 56 49 - 72 0 0 58 43 43 10 8 33 39 255 -16 59 4 40 58 22 49 59 33 41 57 54 4 - 71 0 0 58 40 40 10 8 30 38 256 -16 59 1 39 58 19 45 59 30 41 57 50 58 - 70 0 0 58 37 17 10 8 26 38 257 -15 58 58 17 58 16 20 59 27 21 57 47 32 - 69 0 0 58 33 33 10 8 23 37 258 -15 58 54 34 58 12 35 59 23 40 57 43 44 - 68 0 0 58 29 28 10 8 20 37 259 -14 58 50 31 58 8 29 59 19 40 57 39 36 - 67 0 0 58 25 3 10 8 16 36 260 -14 58 46 7 58 4 1 59 15 18 57 35 6 - 66 0 0 58 20 16 10 8 13 36 261 -13 58 41 23 57 59 13 59 10 37 57 30 15 - 65 0 0 58 15 9 10 8 9 35 262 -13 58 36 17 57 54 3 59 5 34 57 25 2 - 64 0 0 58 9 40 10 8 6 35 263 -12 58 30 51 57 48 32 59 0 10 57 19 28 - 63 0 0 58 3 49 10 8 3 34 264 -11 58 25 2 57 42 39 58 54 25 57 13 32 - 62 0 0 57 57 37 10 8 0 34 265 -11 58 18 53 57 36 24 58 48 19 57 7 14 - 61 0 0 57 51 3 10 7 56 33 266 -10 58 12 21 57 29 48 58 41 52 57 0 34 - 60 0 0 57 44 7 10 7 53 33 267 -10 58 5 28 57 22 49 58 35 2 56 53 31 - 59 0 0 57 36 48 10 7 50 32 267 -9 57 58 12 57 15 27 58 27 50 56 46 5 - 58 0 0 57 29 7 10 7 47 32 268 -9 57 50 34 57 7 43 58 20 17 56 38 17 - 57 0 0 57 21 3 10 7 44 31 269 -8 57 42 33 56 59 36 58 12 20 56 30 5 - 56 0 0 57 12 36 10 7 40 31 270 -8 57 34 10 56 51 5 58 4 1 56 21 31 - 55 0 0 57 3 45 10 7 37 30 271 -7 57 25 23 56 42 12 57 55 19 56 12 32 - 54 0 0 56 54 31 10 7 34 30 272 -7 57 16 12 56 32 54 57 46 14 56 3 9 - 53 0 0 56 44 53 10 7 31 29 273 -6 57 6 38 56 23 12 57 36 45 55 53 23 - 52 0 0 56 34 51 10 7 28 28 274 -5 56 56 40 56 13 6 57 26 52 55 43 11 - 51 0 0 56 24 24 10 7 25 28 275 -5 56 46 17 56 2 35 57 16 35 55 32 35 - 50 0 0 56 13 33 10 7 22 27 276 -4 56 35 30 55 51 40 57 5 53 55 21 34 - 49 0 0 56 2 16 10 7 19 27 276 -4 56 24 17 55 40 19 56 54 47 55 10 7 - 48 0 0 55 50 34 10 7 17 26 277 -3 56 12 39 55 28 32 56 43 15 54 58 14 - 47 0 0 55 38 25 10 7 14 26 278 -3 56 0 35 55 16 19 56 31 18 54 45 55 - 46 0 0 55 25 51 10 7 11 25 279 -2 55 48 6 55 3 40 56 18 54 54 33 10 - 45 0 0 55 12 50 10 7 8 24 280 -1 55 35 9 54 50 34 56 6 4 54 19 57 - 44 0 0 54 59 21 10 7 5 24 281 -1 55 21 46 54 37 1 55 52 48 54 6 18 - 43 0 0 54 45 26 10 7 3 23 282 0 55 7 55 54 23 0 55 39 5 53 52 10 Uncertainty in time = +/- 6 secs Prediction of 2012 Oct 8.0 Data for the target star ------------------------ * name: TYC 1833-00974-1 * constellation : Taurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 04 30 07.3772 DE: +25 26 57.922 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .020, .020 ) * V mag [mag]: 10.5 * B mag [mag]: 11.7 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (643) Scheherezade approx. diameter [km]: 71 approx. diameter ["]: .042 distance from Earth [AU]: 2.35300 * orbital information: orbit source: Preston date of fit: 2012 Oct 07 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 1045 number of rejected observations: 43 time covered by the observations: 1907 Sep 12 - 2012 Sep 18 1 sigma uncertainty ellipse (major, minor, PA): 0.035, 0.015, 95° remarks: * orbital elements for (643) Scheherezade : Mean anomaly = 303.28003304 deg Arg. of pericenter = 232.00631473 deg Long. of node = 252.25440497 deg Inclination = 13.78087583 deg Eccentricity = 0.06171436 Semimajor axis = 3.36763497 AU Perihelion dist = 3.15980352 AU Mag: H = 9.76, G = 0.15 Epoch of elements : MJD 56235.42700000 TDT (2012 Nov 04.427) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 4 643 Scheherezade 10h 15.0m UT 10.5 4 30 7.377 25 26 57.92TYC 1833-00974-1 11.7 14.7 71 6.4 2.353 -1.561 -10.09 -130.2756 25.453 22.16 -15.56 10.2495 -0.17033 0.35626 -5.65243 -2.69858 -0.00269 -0.00074 2000 302.41451420121030.00000232.006315252.254405 13.7808760.06171436 3.3676350 3.1598035 9.7 5.00.15 RATE 1.5948380 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.040 0.025 94 1.69 0.029 0 0 2 2 056208.0020121104_0974-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 07, 20:01 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org