IOTA/IOTA-ES occultation update for (1266) Tone / 2UCAC 46547498 event on 2012 Nov 24, 17:04 UT Visible from Japan, Russia, China, SW Asia, Arabia Summary ------- On 2012 Nov 24 UT, the 89 km diameter asteroid (1266) Tone will occult a 12.3 mag star in the constellation Auriga for observers along a path across Japan, Russia, China, SW Asia, Arabia. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.7 mag to 14.9 mag (the magnitude of the asteroid) for at most 7.5 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, TMO astrometry for the asteroid kindly provided by Bill Owen, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 78 * date and approx. time of event: 2012 Nov 24, 16:56 - 2012 Nov 24, 17:13 UT * geocentric midpoint of event [JD]: 2456256.2113 * magnitude of target star: 12.3 * magnitude drop [mag]: 2.7 * estimated maximum duration [s]: 7.5 * Moon: 86 % sunlit, 72° distance * Sun: 146° distance * rough path description: Japan, Russia, China, SW Asia, Arabia The occultation path -------------------- * approximate projected width [km]: 89 * 1 sigma uncertainty interval [path widths]: +/- 0.71 * 1 sigma uncertainty interval [seconds]: +/- 4.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .034 +/- .032) * 1 sigma uncertainty ellipse (major, minor, PA): ( .034", .032", 97° ) * approx speed of asteroid's shadow [km/s]: 11.7739 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of 2UCAC 46547498 by 1266 Tone 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 32 0 0 9 22 30 17 13 17 1 47 -25 9 55 46 8 49 15 10 43 3 8 2 3 33 0 0 10 18 43 17 13 16 3 47 -26 10 51 55 9 45 32 11 39 6 8 58 25 34 0 0 11 14 30 17 13 16 4 47 -28 11 47 37 10 41 23 12 34 42 9 54 24 35 0 0 12 9 49 17 13 15 5 47 -29 12 42 52 11 36 48 13 29 49 10 49 55 36 0 0 13 4 39 17 13 13 7 47 -30 13 37 36 12 31 43 14 24 25 11 44 58 37 0 0 13 58 56 17 13 12 8 48 -31 14 31 47 13 26 6 15 18 27 12 39 29 38 0 0 14 52 38 17 13 10 9 48 -32 15 25 23 14 19 55 16 11 54 13 33 27 39 0 0 15 45 45 17 13 8 11 48 -34 16 18 22 15 13 8 17 4 44 14 26 50 40 0 0 16 38 13 17 13 5 12 48 -35 17 10 43 16 5 43 17 56 56 15 19 35 41 0 0 17 30 1 17 13 3 13 49 -36 18 2 24 16 57 39 18 48 26 16 11 41 42 0 0 18 21 8 17 13 0 14 49 -37 18 53 24 17 48 53 19 39 14 17 3 7 43 0 0 19 11 32 17 12 57 16 49 -38 19 43 40 18 39 25 20 29 19 17 53 51 44 0 0 20 1 12 17 12 53 17 50 -39 20 33 12 19 29 14 21 18 39 18 43 51 45 0 0 20 50 7 17 12 50 18 50 -40 21 21 58 20 18 17 22 7 13 19 33 6 46 0 0 21 38 16 17 12 46 19 50 -41 22 9 58 21 6 35 22 55 1 20 21 36 47 0 0 22 25 37 17 12 42 21 51 -42 22 57 11 21 54 5 23 42 1 21 9 19 48 0 0 23 12 11 17 12 38 22 51 -43 23 43 35 22 40 48 24 28 12 21 56 15 49 0 0 23 57 56 17 12 34 23 52 -44 24 29 10 23 26 42 25 13 34 22 42 22 50 0 0 24 42 51 17 12 29 24 52 -45 25 13 56 24 11 47 25 58 7 23 27 40 51 0 0 25 26 57 17 12 25 25 52 -46 25 57 52 24 56 2 26 41 50 24 12 9 52 0 0 26 10 12 17 12 20 26 53 -47 26 40 58 25 39 27 27 24 42 24 55 48 53 0 0 26 52 37 17 12 15 27 53 -48 27 23 14 26 22 2 28 6 43 25 38 37 54 0 0 27 34 12 17 12 10 29 54 -49 28 4 38 27 3 46 28 47 54 26 20 35 55 0 0 28 14 56 17 12 5 30 54 -50 28 45 12 27 44 40 29 28 14 27 1 43 56 0 0 28 54 48 17 12 0 31 55 -51 29 24 55 28 24 42 30 7 43 27 41 59 57 0 0 29 33 50 17 11 55 32 55 -51 30 3 47 29 3 54 30 46 21 28 21 25 58 0 0 30 12 2 17 11 49 33 56 -52 30 41 49 29 42 16 31 24 8 29 0 0 59 0 0 30 49 22 17 11 44 34 56 -53 31 19 0 30 19 46 32 1 5 29 37 45 60 0 0 31 25 53 17 11 38 35 57 -54 31 55 20 30 56 26 32 37 12 30 14 39 61 0 0 32 1 33 17 11 33 36 57 -54 32 30 51 31 32 17 33 12 28 30 50 43 62 0 0 32 36 24 17 11 27 37 58 -55 33 5 31 32 7 17 33 46 55 31 25 57 63 0 0 33 10 25 17 11 21 38 58 -56 33 39 23 32 41 28 34 20 33 32 0 22 64 0 0 33 43 37 17 11 15 39 59 -57 34 12 25 33 14 49 34 53 21 32 33 57 65 0 0 34 16 0 17 11 10 40 60 -57 34 44 39 33 47 22 35 25 22 33 6 44 66 0 0 34 47 35 17 11 4 41 60 -58 35 16 5 34 19 7 35 56 34 33 38 42 67 0 0 35 18 23 17 10 58 42 61 -58 35 46 43 34 50 3 36 26 59 34 9 52 68 0 0 35 48 23 17 10 52 43 61 -59 36 16 34 35 20 13 36 56 36 34 40 14 69 0 0 36 17 36 17 10 46 44 62 -60 36 45 38 35 49 35 37 25 28 35 9 50 70 0 0 36 46 3 17 10 40 45 63 -60 37 13 56 36 18 12 37 53 33 35 38 39 71 0 0 37 13 45 17 10 33 46 63 -61 37 41 29 36 46 2 38 20 53 36 6 42 72 0 0 37 40 42 17 10 27 46 64 -61 38 8 17 37 13 7 38 47 29 36 33 59 73 0 0 38 6 54 17 10 21 47 65 -61 38 34 20 37 39 28 39 13 20 37 0 32 74 0 0 38 32 22 17 10 15 48 65 -62 38 59 40 38 5 4 39 38 27 37 26 21 75 0 0 38 57 6 17 10 9 49 66 -62 39 24 16 38 29 58 40 2 52 37 51 26 76 0 0 39 21 8 17 10 3 50 67 -63 39 48 10 38 54 8 40 26 34 38 15 47 77 0 0 39 44 28 17 9 57 51 67 -63 40 11 22 39 17 35 40 49 35 38 39 26 78 0 0 40 7 6 17 9 50 52 68 -63 40 33 52 39 40 21 41 11 54 39 2 23 79 0 0 40 29 4 17 9 44 52 69 -64 40 55 42 40 2 26 41 33 32 39 24 39 80 0 0 40 50 20 17 9 38 53 69 -64 41 16 51 40 23 50 41 54 31 39 46 14 81 0 0 41 10 57 17 9 32 54 70 -64 41 37 20 40 44 34 42 14 50 40 7 8 82 0 0 41 30 54 17 9 26 55 71 -65 41 57 11 41 4 39 42 34 30 40 27 23 83 0 0 41 50 13 17 9 19 56 72 -65 42 16 22 41 24 5 42 53 32 40 46 58 84 0 0 42 8 53 17 9 13 56 72 -65 42 34 56 41 42 52 43 11 56 41 5 55 85 0 0 42 26 56 17 9 7 57 73 -65 42 52 52 42 1 1 43 29 42 41 24 14 86 0 0 42 44 21 17 9 1 58 74 -65 43 10 11 42 18 33 43 46 52 41 41 55 87 0 0 43 1 10 17 8 55 59 75 -65 43 26 53 42 35 28 44 3 26 41 58 58 88 0 0 43 17 23 17 8 48 59 76 -65 43 43 0 42 51 46 44 19 24 42 15 26 89 0 0 43 33 0 17 8 42 60 76 -66 43 58 31 43 7 29 44 34 47 42 31 17 90 0 0 43 48 1 17 8 36 61 77 -66 44 13 27 43 22 36 44 49 34 42 46 32 91 0 0 44 2 28 17 8 30 62 78 -66 44 27 48 43 37 9 45 3 48 43 1 12 92 0 0 44 16 21 17 8 24 62 79 -66 44 41 35 43 51 7 45 17 28 43 15 17 93 0 0 44 29 39 17 8 17 63 80 -66 44 54 49 44 4 30 45 30 34 43 28 48 94 0 0 44 42 24 17 8 11 64 81 -66 45 7 29 44 17 20 45 43 7 43 41 45 95 0 0 44 54 37 17 8 5 64 81 -65 45 19 37 44 29 37 45 55 8 43 54 9 96 0 0 45 6 16 17 7 59 65 82 -65 45 31 12 44 41 21 46 6 36 44 5 59 97 0 0 45 17 23 17 7 53 66 83 -65 45 42 14 44 52 33 46 17 33 44 17 17 98 0 0 45 27 58 17 7 47 67 84 -65 45 52 45 45 3 12 46 27 58 44 28 2 99 0 0 45 38 2 17 7 41 67 85 -65 46 2 45 45 13 19 46 37 52 44 38 15 100 0 0 45 47 34 17 7 34 68 86 -65 46 12 13 45 22 55 46 47 15 44 47 56 101 0 0 45 56 35 17 7 28 69 87 -65 46 21 11 45 32 0 46 56 8 44 57 6 102 0 0 46 5 6 17 7 22 69 88 -65 46 29 38 45 40 34 47 4 30 45 5 45 103 0 0 46 13 6 17 7 16 70 89 -64 46 37 35 45 48 38 47 12 23 45 13 53 104 0 0 46 20 36 17 7 10 71 90 -64 46 45 2 45 56 11 47 19 46 45 21 30 105 0 0 46 27 36 17 7 4 71 91 -64 46 52 0 46 3 14 47 26 39 45 28 37 106 0 0 46 34 7 17 6 58 72 92 -64 46 58 28 46 9 47 47 33 3 45 35 14 107 0 0 46 40 8 17 6 51 73 93 -63 47 4 26 46 15 50 47 38 58 45 41 21 108 0 0 46 45 40 17 6 45 73 95 -63 47 9 56 46 21 24 47 44 25 45 46 58 109 0 0 46 50 43 17 6 39 74 96 -63 47 14 57 46 26 29 47 49 23 45 52 6 110 0 0 46 55 17 17 6 33 75 97 -63 47 19 29 46 31 5 47 53 52 45 56 44 111 0 0 46 59 22 17 6 27 75 98 -62 47 23 33 46 35 12 47 57 53 46 0 54 112 0 0 47 2 59 17 6 21 76 100 -62 47 27 8 46 38 50 48 1 27 46 4 34 113 0 0 47 6 7 17 6 15 76 101 -62 47 30 15 46 41 59 48 4 32 46 7 45 114 0 0 47 8 47 17 6 9 77 103 -61 47 32 53 46 44 40 48 7 9 46 10 27 115 0 0 47 10 58 17 6 2 78 104 -61 47 35 4 46 46 53 48 9 18 46 12 41 116 0 0 47 12 42 17 5 56 78 106 -61 47 36 47 46 48 37 48 11 0 46 14 26 117 0 0 47 13 57 17 5 50 79 108 -60 47 38 2 46 49 53 48 12 14 46 15 43 118 0 0 47 14 44 17 5 44 79 110 -60 47 38 48 46 50 40 48 13 1 46 16 31 119 0 0 47 15 3 17 5 38 80 112 -59 47 39 7 46 50 59 48 13 19 46 16 50 120 0 0 47 14 54 17 5 31 81 114 -59 47 38 59 46 50 51 48 13 11 46 16 41 121 0 0 47 14 17 17 5 25 81 117 -59 47 38 22 46 50 13 48 12 34 46 16 4 122 0 0 47 13 12 17 5 19 82 119 -58 47 37 17 46 49 8 48 11 31 46 14 58 123 0 0 47 11 39 17 5 13 82 123 -58 47 35 45 46 47 34 48 9 59 46 13 23 124 0 0 47 9 38 17 5 7 83 126 -57 47 33 45 46 45 32 48 8 0 46 11 20 125 0 0 47 7 9 17 5 0 83 131 -57 47 31 16 46 43 2 48 5 33 46 8 48 126 0 0 47 4 11 17 4 54 84 136 -56 47 28 20 46 40 3 48 2 38 46 5 48 127 0 0 47 0 45 17 4 48 84 142 -56 47 24 55 46 36 36 47 59 16 46 2 18 128 0 0 46 56 51 17 4 41 84 149 -56 47 21 2 46 32 40 47 55 25 45 58 20 129 0 0 46 52 28 17 4 35 85 157 -55 47 16 41 46 28 15 47 51 6 45 53 52 130 0 0 46 47 36 17 4 29 85 167 -55 47 11 51 46 23 21 47 46 19 45 48 56 131 0 0 46 42 15 17 4 22 85 178 -54 47 6 33 46 17 58 47 41 4 45 43 30 132 0 0 46 36 25 17 4 16 85 189 -54 47 0 45 46 12 6 47 35 20 45 37 35 133 0 0 46 30 6 17 4 10 85 201 -53 46 54 29 46 5 44 47 29 7 45 31 9 134 0 0 46 23 18 17 4 3 85 212 -53 46 47 43 45 58 53 47 22 25 45 24 14 135 0 0 46 16 0 17 3 57 85 221 -52 46 40 28 45 51 32 47 15 14 45 16 49 136 0 0 46 8 12 17 3 50 84 230 -52 46 32 43 45 43 41 47 7 33 45 8 54 137 0 0 45 59 53 17 3 44 84 237 -51 46 24 28 45 35 20 46 59 23 45 0 28 138 0 0 45 51 5 17 3 37 84 242 -51 46 15 43 45 26 27 46 50 43 44 51 31 139 0 0 45 41 46 17 3 31 83 247 -50 46 6 27 45 17 4 46 41 32 44 42 2 140 0 0 45 31 55 17 3 24 83 252 -50 45 56 41 45 7 10 46 31 51 44 32 3 141 0 0 45 21 34 17 3 17 82 255 -49 45 46 23 44 56 45 46 21 40 44 21 31 142 0 0 45 10 40 17 3 11 82 259 -48 45 35 34 44 45 47 46 10 57 44 10 28 143 0 0 44 59 15 17 3 4 81 261 -48 45 24 14 44 34 18 45 59 42 43 58 52 144 0 0 44 47 18 17 2 57 80 264 -47 45 12 21 44 22 16 45 47 56 43 46 44 145 0 0 44 34 48 17 2 51 80 266 -47 44 59 55 44 9 41 45 35 38 43 34 2 146 0 0 44 21 45 17 2 44 79 268 -46 44 46 57 43 56 33 45 22 46 43 20 47 147 0 0 44 8 8 17 2 37 78 270 -45 44 33 26 43 42 51 45 9 22 43 6 58 148 0 0 43 53 58 17 2 30 78 272 -45 44 19 21 43 28 35 44 55 25 42 52 34 149 0 0 43 39 13 17 2 23 77 274 -44 44 4 41 43 13 45 44 40 54 42 37 36 150 0 0 43 23 53 17 2 16 76 275 -44 43 49 28 42 58 20 44 25 48 42 22 3 151 0 0 43 7 59 17 2 9 76 277 -43 43 33 39 42 42 19 44 10 8 42 5 54 152 0 0 42 51 29 17 2 2 75 278 -42 43 17 15 42 25 43 43 53 52 41 49 9 153 0 0 42 34 22 17 1 55 74 279 -42 43 0 15 42 8 30 43 37 1 41 31 48 154 0 0 42 16 39 17 1 48 73 280 -41 42 42 38 41 50 41 43 19 34 41 13 49 155 0 0 41 58 20 17 1 41 73 282 -40 42 24 25 41 32 15 43 1 30 40 55 14 156 0 0 41 39 22 17 1 34 72 283 -40 42 5 34 41 13 10 42 42 49 40 36 0 157 0 0 41 19 47 17 1 27 71 284 -39 41 46 6 40 53 28 42 23 30 40 16 8 158 0 0 40 59 32 17 1 20 70 285 -38 41 25 59 40 33 7 42 3 33 39 55 36 159 0 0 40 38 39 17 1 12 70 286 -38 41 5 13 40 12 6 41 42 58 39 34 25 160 0 0 40 17 6 17 1 5 69 287 -37 40 43 48 39 50 26 41 21 43 39 12 35 161 0 0 39 54 53 17 0 58 68 288 -36 40 21 42 39 28 5 40 59 48 38 50 3 162 0 0 39 32 0 17 0 50 67 289 -35 39 58 56 39 5 4 40 37 13 38 26 51 163 0 0 39 8 25 17 0 43 66 290 -35 39 35 29 38 41 21 40 13 58 38 2 57 164 0 0 38 44 8 17 0 36 65 291 -34 39 11 20 38 16 56 39 50 0 37 38 20 165 0 0 38 19 9 17 0 28 65 291 -33 38 46 29 37 51 49 39 25 21 37 13 1 166 0 0 37 53 27 17 0 21 64 292 -32 38 20 56 37 25 58 38 59 59 36 46 59 167 0 0 37 27 1 17 0 13 63 293 -32 37 54 39 36 59 25 38 33 54 36 20 13 168 0 0 36 59 52 17 0 6 62 294 -31 37 27 38 36 32 7 38 7 6 35 52 43 169 0 0 36 31 58 16 59 58 61 295 -30 36 59 53 36 4 4 37 39 33 35 24 29 170 0 0 36 3 19 16 59 50 60 295 -29 36 31 23 35 35 17 37 11 16 34 55 28 171 0 0 35 33 55 16 59 43 59 296 -28 36 2 8 35 5 43 36 42 13 34 25 43 172 0 0 35 3 45 16 59 35 58 297 -28 35 32 6 34 35 24 36 12 25 33 55 11 173 0 0 34 32 48 16 59 28 57 298 -27 35 1 19 34 4 18 35 41 50 33 23 52 174 0 0 34 1 5 16 59 20 56 298 -26 34 29 45 33 32 26 35 10 29 32 51 46 175 0 0 33 28 34 16 59 12 56 299 -25 33 57 23 32 59 46 34 38 21 32 18 53 176 0 0 32 55 16 16 59 5 55 300 -24 33 24 14 32 26 18 34 5 25 31 45 13 177 0 0 32 21 10 16 58 57 54 300 -23 32 50 18 31 52 3 33 31 42 31 10 44 178 0 0 31 46 15 16 58 50 53 301 -22 32 15 33 31 16 59 32 57 10 30 35 26 179 0 0 31 10 32 16 58 42 52 301 -21 31 39 59 30 41 6 32 21 50 29 59 20 180 0 0 30 34 0 16 58 34 51 302 -20 31 3 36 30 4 25 31 45 41 29 22 25 -179 0 0 29 56 39 16 58 27 49 303 -19 30 26 25 29 26 54 31 8 43 28 44 42 -178 0 0 29 18 29 16 58 19 48 303 -18 29 48 25 28 48 35 30 30 56 28 6 9 -177 0 0 28 39 30 16 58 12 47 304 -17 29 9 35 28 9 26 29 52 20 27 26 47 -176 0 0 27 59 42 16 58 4 46 304 -16 28 29 56 27 29 29 29 12 54 26 46 35 -175 0 0 27 19 4 16 57 57 45 305 -15 27 49 28 26 48 42 28 32 39 26 5 35 -174 0 0 26 37 38 16 57 49 44 305 -14 27 8 10 26 7 6 27 51 35 25 23 46 -173 0 0 25 55 22 16 57 42 43 306 -13 26 26 4 25 24 41 27 9 42 24 41 8 -172 0 0 25 12 18 16 57 35 42 306 -12 25 43 9 24 41 28 26 27 0 23 57 42 -171 0 0 24 28 26 16 57 28 41 307 -11 24 59 26 23 57 27 25 43 30 23 13 28 -170 0 0 23 43 46 16 57 21 40 307 -10 24 14 55 23 12 38 24 59 11 22 28 26 -169 0 0 22 58 19 16 57 14 38 308 -9 23 29 37 22 27 2 24 14 5 21 42 38 -168 0 0 22 12 5 16 57 7 37 308 -8 22 43 31 21 40 39 23 28 12 20 56 3 -167 0 0 21 25 5 16 57 0 36 308 -7 21 56 40 20 53 31 22 41 33 20 8 43 -166 0 0 20 37 20 16 56 53 35 309 -6 21 9 3 20 5 38 21 54 8 19 20 39 -165 0 0 19 48 51 16 56 47 34 309 -5 20 20 42 19 17 1 21 5 58 18 31 50 -164 0 0 18 59 39 16 56 40 32 309 -4 19 31 38 18 27 42 20 17 5 17 42 20 -163 0 0 18 9 46 16 56 34 31 310 -2 18 41 52 17 37 40 19 27 29 16 52 8 -162 0 0 17 19 11 16 56 28 30 310 -1 17 51 25 16 46 59 18 37 12 16 1 16 -161 0 0 16 27 58 16 56 22 29 310 0 17 0 18 15 55 38 17 46 16 15 9 46 Uncertainty in time = +/- 6 secs Prediction of 2012 Nov 16.0 Data for the target star ------------------------ * name: 2UCAC 46547498 * constellation : Auriga * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 04 28.4626 DE: +42 56 55.223 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .024, .028 ) * V mag [mag]: 12.3 * B mag [mag]: 0.0 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1266) Tone approx. diameter [km]: 89 approx. diameter ["]: .046 distance from Earth [AU]: 2.66700 * orbital information: orbit source: Preston date of fit: 2012 Nov 16 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 1016 number of rejected observations: 41 time covered by the observations: 1927 Jan 23 - 2012 Nov 08 1 sigma uncertainty ellipse (major, minor, PA): 0.024, 0.017, 104° remarks: * orbital elements for (1266) Tone : Mean anomaly = 187.04654144 deg Arg. of pericenter = 294.70843733 deg Long. of node = 320.73843243 deg Inclination = 17.14158358 deg Eccentricity = 0.04831969 Semimajor axis = 3.36766134 AU Perihelion dist = 3.20493701 AU Mag: H = 9.32, G = 0.15 Epoch of elements : MJD 56255.71200000 TDT (2012 Nov 24.712) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 24 1266 Tone 17h 4.3m UT 12.3 6 4 28.463 42 56 55.222UCAC 46547498 0.0 14.9 89 7.5 2.667 -1.978 3.06 130.9931 42.948 -79.34 -20.72 17.0712 0.00855 0.06055 -6.58012 0.92997 -0.00284 -0.00175 2000 186.13558020121119.00000294.708437320.738432 17.1415840.04831969 3.3676613 3.2049370 9.4 5.00.15 RATE 1.5948190 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.034 0.032 97 1.71 0.032 0 0-4 3 056247.0020121124_547498 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Nov 16, 08:49 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org