IOTA/IOTA-ES occultation update for (11889) 1991 AH2 / TYC 6296-02022-1 event on 2012 Jul 12, 17:25 UT Visible from Australia Summary ------- On 2012 Jul 12 UT, the 13 km diameter asteroid (11889) 1991 AH2 will occult a 9.9 mag star in the constellation Sagittarius for observers along a path across Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.1 mag to 15.0 mag (the magnitude of the asteroid) for at most 1.1 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: 8 * date and approx. time of event: 2012 Jul 12, 17:17 - 2012 Jul 12, 17:32 UT * geocentric midpoint of event [JD]: 2456121.22573333 * magnitude of target star: 9.9 * magnitude drop [mag]: 5.1 * estimated maximum duration [s]: 1.1 * Moon: 34 % sunlit, 109° distance * Sun: 173° distance * rough path description: Australia The occultation path -------------------- * approximate projected width [km]: 15 * 1 sigma uncertainty interval [path widths]: +/- 8.68 * 1 sigma uncertainty interval [seconds]: +/- 8.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .134 +/- .069) * 1 sigma uncertainty ellipse (major, minor, PA): ( .136", .066", 101° ) * approx speed of asteroid's shadow [km/s]: 11.8877 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6296-02022-1 by 11889 1991 AH2 on 2012 Jul 12 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 ' " Longitude Longitude Longitude Longitude -175 26 37 9 0 0 17 17 24 2 254 -4 -175 40 21 -175 12 45 ... .. .. ... .. .. -178 26 59 8 0 0 17 17 26 5 254 -7 -178 39 9 -178 14 43 178 2 21 -174 24 18 Latitude Latitude Latitude Latitude -180 0 0 7 25 53 17 17 28 7 253 -8 7 30 15 7 21 31 .. .. .. 6 5 6 179 0 0 7 2 44 17 17 30 8 253 -9 7 7 7 6 58 21 8 22 44 5 41 33 178 0 0 6 38 40 17 17 31 9 253 -10 6 43 4 6 34 15 7 59 3 5 17 4 177 0 0 6 13 41 17 17 33 10 253 -12 6 18 7 6 9 15 7 34 29 4 51 40 176 0 0 5 47 47 17 17 36 11 253 -13 5 52 14 5 43 19 7 9 0 4 25 19 175 0 0 5 20 57 17 17 38 12 253 -14 5 25 26 5 16 28 6 42 37 3 58 2 174 0 0 4 53 12 17 17 41 13 253 -15 4 57 42 4 48 41 6 15 19 3 29 48 173 0 0 4 24 31 17 17 44 15 253 -16 4 29 3 4 19 59 5 47 6 3 0 38 172 0 0 3 54 53 17 17 47 16 253 -17 3 59 27 3 50 20 5 17 57 2 30 30 171 0 0 3 24 20 17 17 50 17 253 -18 3 28 55 3 19 44 4 47 53 1 59 25 170 0 0 2 52 49 17 17 54 18 253 -19 2 57 26 2 48 12 4 16 54 1 27 22 169 0 0 2 20 22 17 17 57 19 253 -20 2 25 1 2 15 43 3 44 59 0 54 22 168 0 0 1 46 58 17 18 2 20 253 -21 1 51 38 1 42 17 3 12 7 0 20 23 167 0 0 1 12 37 17 18 6 21 253 -23 1 17 19 1 7 54 2 38 20 - 0 14 33 166 0 0 0 37 19 17 18 11 22 253 -24 0 42 3 0 32 34 2 3 36 - 0 50 27 165 0 0 0 1 4 17 18 15 23 253 -25 0 5 50 - 0 3 43 1 27 56 - 1 27 20 164 0 0 - 0 36 9 17 18 20 24 253 -26 - 0 31 21 - 0 40 57 0 51 20 - 2 5 11 163 0 0 - 1 14 19 17 18 26 26 253 -27 - 1 9 28 - 1 19 9 0 13 47 - 2 43 59 162 0 0 - 1 53 25 17 18 31 27 254 -28 - 1 48 33 - 1 58 18 - 0 24 42 - 3 23 46 161 0 0 - 2 33 29 17 18 37 28 254 -29 - 2 28 34 - 2 38 24 - 1 4 7 - 4 4 31 160 0 0 - 3 14 29 17 18 44 29 254 -31 - 3 9 32 - 3 19 26 - 1 44 27 - 4 46 13 159 0 0 - 3 56 26 17 18 50 30 254 -32 - 3 51 27 - 4 1 25 - 2 25 44 - 5 28 53 158 0 0 - 4 39 19 17 18 57 31 255 -33 - 4 34 18 - 4 44 21 - 3 7 56 - 6 12 29 157 0 0 - 5 23 8 17 19 4 32 255 -34 - 5 18 4 - 5 28 12 - 3 51 2 - 6 57 3 156 0 0 - 6 7 52 17 19 11 33 256 -35 - 6 2 46 - 6 12 59 - 4 35 4 - 7 42 33 155 0 0 - 6 53 31 17 19 18 35 256 -36 - 6 48 23 - 6 58 40 - 5 19 59 - 8 28 58 154 0 0 - 7 40 5 17 19 26 36 256 -38 - 7 34 54 - 7 45 16 - 6 5 48 - 9 16 19 153 0 0 - 8 27 32 17 19 34 37 257 -39 - 8 22 18 - 8 32 46 - 6 52 30 -10 4 34 152 0 0 - 9 15 51 17 19 42 38 258 -40 - 9 10 35 - 9 21 8 - 7 40 4 -10 53 42 151 0 0 -10 5 3 17 19 51 39 258 -41 - 9 59 44 -10 10 22 - 8 28 29 -11 43 43 150 0 0 -10 55 5 17 19 59 40 259 -42 -10 49 44 -11 0 27 - 9 17 45 -12 34 36 149 0 0 -11 45 58 17 20 8 41 260 -43 -11 40 33 -11 51 22 -10 7 50 -13 26 19 148 0 0 -12 37 38 17 20 18 42 260 -45 -12 32 12 -12 43 5 -10 58 42 -14 18 52 147 0 0 -13 30 7 17 20 27 43 261 -46 -13 24 37 -13 35 36 -11 50 22 -15 12 12 146 0 0 -14 23 21 17 20 37 44 262 -47 -14 17 48 -14 28 53 -12 42 47 -16 6 19 145 0 0 -15 17 19 17 20 47 45 263 -48 -15 11 44 -15 22 55 -13 35 57 -17 1 11 144 0 0 -16 12 0 17 20 57 46 264 -49 -16 6 22 -16 17 38 -14 29 48 -17 56 46 143 0 0 -17 7 22 17 21 7 47 266 -50 -17 1 42 -17 13 3 -15 24 20 -18 53 2 142 0 0 -18 3 23 17 21 18 48 267 -51 -17 57 40 -18 9 7 -16 19 32 -19 49 57 141 0 0 -19 0 1 17 21 29 49 268 -53 -18 54 15 -19 5 48 -17 15 20 -20 47 30 140 0 0 -19 57 14 17 21 40 50 269 -54 -19 51 25 -20 3 4 -18 11 42 -21 45 37 139 0 0 -20 55 0 17 21 51 51 271 -55 -20 49 8 -21 0 52 -19 8 38 -22 44 17 138 0 0 -21 53 15 17 22 2 52 273 -56 -21 47 21 -21 59 11 -20 6 4 -23 43 27 137 0 0 -22 51 58 17 22 13 53 274 -57 -22 46 1 -22 57 57 -21 3 57 -24 43 4 136 0 0 -23 51 6 17 22 25 54 276 -58 -23 45 6 -23 57 7 -22 2 16 -25 43 6 135 0 0 -24 50 37 17 22 36 54 278 -58 -24 44 33 -24 56 40 -23 0 58 -26 43 30 134 0 0 -25 50 26 17 22 48 55 280 -59 -25 44 20 -25 56 32 -23 59 59 -27 44 12 133 0 0 -26 50 31 17 23 0 56 282 -60 -26 44 23 -26 56 41 -24 59 17 -28 45 10 132 0 0 -27 50 50 17 23 12 56 284 -61 -27 44 39 -27 57 2 -25 58 50 -29 46 20 131 0 0 -28 51 19 17 23 24 57 286 -62 -28 45 5 -28 57 33 -26 58 33 -30 47 38 130 0 0 -29 51 54 17 23 36 57 289 -62 -29 45 37 -29 58 11 -27 58 24 -31 49 2 129 0 0 -30 52 32 17 23 48 58 291 -63 -30 46 13 -30 58 51 -28 58 20 -32 50 28 128 0 0 -31 53 10 17 23 59 58 294 -63 -31 46 49 -31 59 32 -29 58 17 -33 51 52 127 0 0 -32 53 44 17 24 11 58 296 -64 -32 47 21 -33 0 9 -30 58 11 -34 53 11 126 0 0 -33 54 12 17 24 23 59 299 -64 -33 47 46 -34 0 38 -31 58 0 -35 54 21 125 0 0 -34 54 28 17 24 35 59 301 -65 -34 48 0 -35 0 56 -32 57 41 -36 55 17 124 0 0 -35 54 30 17 24 47 59 304 -65 -35 48 0 -36 1 0 -33 57 9 -37 55 57 123 0 0 -36 54 14 17 24 59 59 307 -65 -36 47 42 -37 0 46 -34 56 21 -38 56 16 122 0 0 -37 53 36 17 25 10 59 309 -65 -37 47 3 -38 0 10 -35 55 14 -39 56 12 121 0 0 -38 52 33 17 25 22 59 312 -65 -38 45 59 -38 59 9 -36 53 45 -40 55 39 120 0 0 -39 51 2 17 25 33 59 314 -65 -39 44 26 -39 57 39 -37 51 50 -41 54 35 119 0 0 -40 48 59 17 25 45 58 317 -65 -40 42 22 -40 55 37 -38 49 26 -42 52 56 118 0 0 -41 46 21 17 25 56 58 320 -65 -41 39 43 -41 53 0 -39 46 29 -43 50 38 117 0 0 -42 43 5 17 26 7 58 322 -65 -42 36 25 -42 49 44 -40 42 58 -44 47 39 116 0 0 -43 39 7 17 26 17 58 324 -64 -43 32 27 -43 45 47 -41 38 48 -45 43 55 115 0 0 -44 34 25 17 26 28 57 327 -64 -44 27 44 -44 41 6 -42 33 57 -46 39 23 114 0 0 -45 28 55 17 26 38 57 329 -64 -45 22 15 -45 35 37 -43 28 22 -47 34 1 113 0 0 -46 22 37 17 26 49 56 331 -63 -46 15 56 -46 29 18 -44 22 1 -48 27 45 112 0 0 -47 15 26 17 26 59 56 334 -63 -47 8 45 -47 22 7 -45 14 51 -49 20 33 111 0 0 -48 7 21 17 27 8 55 336 -62 -48 0 40 -48 14 2 -46 6 50 -50 12 23 110 0 0 -48 58 19 17 27 18 55 338 -62 -48 51 39 -49 5 0 -46 57 57 -51 3 13 109 0 0 -49 48 20 17 27 27 54 340 -61 -49 41 40 -49 55 0 -47 48 8 -51 53 2 108 0 0 -50 37 21 17 27 36 54 342 -60 -50 30 42 -50 44 0 -48 37 23 -52 41 47 107 0 0 -51 25 20 17 27 45 53 343 -60 -51 18 43 -51 31 59 -49 25 40 -53 29 27 106 0 0 -52 12 18 17 27 54 53 345 -59 -52 5 41 -52 18 55 -50 12 58 -54 16 1 105 0 0 -52 58 12 17 28 2 52 347 -59 -52 51 37 -53 4 48 -50 59 16 -55 1 29 104 0 0 -53 43 2 17 28 10 51 349 -58 -53 36 29 -53 49 36 -51 44 33 -55 45 49 103 0 0 -54 26 48 17 28 18 51 350 -57 -54 20 16 -54 33 20 -52 28 48 -56 29 2 102 0 0 -55 9 28 17 28 26 50 352 -57 -55 2 58 -55 15 59 -53 12 0 -57 11 7 101 0 0 -55 51 4 17 28 33 49 354 -56 -55 44 36 -55 57 32 -53 54 10 -57 52 4 100 0 0 -56 31 34 17 28 40 49 355 -55 -56 25 8 -56 38 1 -54 35 18 -58 31 53 99 0 0 -57 10 59 17 28 47 48 357 -55 -57 4 36 -57 17 24 -55 15 22 -59 10 35 98 0 0 -57 49 20 17 28 54 48 358 -54 -57 42 59 -57 55 42 -55 54 24 -59 48 10 97 0 0 -58 26 36 17 29 0 47 359 -53 -58 20 17 -58 32 56 -56 32 24 -60 24 38 96 0 0 -59 2 49 17 29 7 46 1 -53 -58 56 33 -59 9 6 -57 9 21 -61 0 1 95 0 0 -59 37 59 17 29 13 46 2 -52 -59 31 45 -59 44 13 -57 45 18 -61 34 20 94 0 0 -60 12 7 17 29 18 45 3 -51 -60 5 56 -60 18 18 -58 20 13 -62 7 35 93 0 0 -60 45 13 17 29 24 45 5 -51 -60 39 5 -60 51 22 -58 54 9 -62 39 47 92 0 0 -61 17 20 17 29 30 44 6 -50 -61 11 15 -61 23 26 -59 27 5 -63 10 59 91 0 0 -61 48 27 17 29 35 43 7 -50 -61 42 25 -61 54 30 -59 59 4 -63 41 10 90 0 0 -62 18 37 17 29 40 43 8 -49 -62 12 38 -62 24 37 -60 30 5 -64 10 23 89 0 0 -62 47 50 17 29 45 42 10 -48 -62 41 53 -62 53 47 -61 0 10 -64 38 38 88 0 0 -63 16 7 17 29 50 42 11 -48 -63 10 14 -63 22 1 -61 29 20 -65 5 58 87 0 0 -63 43 30 17 29 54 41 12 -47 -63 37 40 -63 49 21 -61 57 36 -65 32 23 86 0 0 -64 10 0 17 29 59 41 13 -47 -64 4 13 -64 15 48 -62 25 0 -65 57 55 85 0 0 -64 35 39 17 30 3 40 14 -46 -64 29 54 -64 41 24 -62 51 32 -66 22 35 84 0 0 -65 0 27 17 30 7 40 16 -46 -64 54 45 -65 6 9 -63 17 13 -66 46 25 83 0 0 -65 24 26 17 30 11 39 17 -45 -65 18 47 -65 30 5 -63 42 5 -67 9 27 82 0 0 -65 47 37 17 30 15 39 18 -45 -65 42 2 -65 53 13 -64 6 10 -67 31 41 81 0 0 -66 10 2 17 30 19 38 19 -44 -66 4 30 -66 15 35 -64 29 28 -67 53 9 80 0 0 -66 31 42 17 30 22 38 20 -44 -66 26 13 -66 37 12 -64 52 0 -68 13 52 79 0 0 -66 52 39 17 30 26 37 21 -43 -66 47 12 -66 58 6 -65 13 48 -68 33 53 78 0 0 -67 12 53 17 30 29 37 22 -43 -67 7 29 -67 18 17 -65 34 53 -68 53 11 77 0 0 -67 32 25 17 30 33 36 23 -42 -67 27 4 -67 37 46 -65 55 16 -69 11 49 76 0 0 -67 51 17 17 30 36 36 24 -42 -67 45 59 -67 56 36 -66 14 59 -69 29 48 75 0 0 -68 9 31 17 30 39 36 25 -41 -68 4 16 -68 14 47 -66 34 1 -69 47 9 74 0 0 -68 27 7 17 30 42 35 26 -41 -68 21 54 -68 32 20 -66 52 26 -70 3 53 73 0 0 -68 44 6 17 30 45 35 28 -40 -68 38 56 -68 49 17 -67 10 13 -70 20 1 72 0 0 -69 0 30 17 30 47 34 29 -40 -68 55 23 -69 5 38 -67 27 23 -70 35 35 71 0 0 -69 16 20 17 30 50 34 30 -40 -69 11 15 -69 21 25 -67 43 59 -70 50 36 70 0 0 -69 31 36 17 30 53 33 31 -39 -69 26 34 -69 36 38 -68 0 0 -71 5 4 69 0 0 -69 46 20 17 30 55 33 32 -39 -69 41 20 -69 51 20 -68 15 28 -71 19 1 68 0 0 -70 0 32 17 30 58 33 33 -38 -69 55 35 -70 5 30 -68 30 23 -71 32 27 67 0 0 -70 14 14 17 31 0 32 34 -38 -70 9 19 -70 19 9 -68 44 47 -71 45 24 66 0 0 -70 27 26 17 31 3 32 35 -38 -70 22 34 -70 32 19 -68 58 41 -71 57 53 65 0 0 -70 40 10 17 31 5 32 36 -37 -70 35 20 -70 45 1 -69 12 5 -72 9 54 64 0 0 -70 52 26 17 31 7 31 37 -37 -70 47 38 -70 57 15 -69 25 0 -72 21 29 63 0 0 -71 4 15 17 31 9 31 38 -37 -70 59 29 -71 9 1 -69 37 27 -72 32 37 62 0 0 -71 15 38 17 31 11 31 39 -36 -71 10 54 -71 20 22 -69 49 27 -72 43 21 61 0 0 -71 26 35 17 31 13 30 40 -36 -71 21 53 -71 31 17 -70 1 1 -72 53 40 60 0 0 -71 37 8 17 31 15 30 41 -36 -71 32 28 -71 41 48 -70 12 8 -73 3 35 59 0 0 -71 47 16 17 31 17 30 42 -35 -71 42 38 -71 51 54 -70 22 51 -73 13 8 58 0 0 -71 57 1 17 31 19 29 43 -35 -71 52 25 -72 1 38 -70 33 9 -73 22 18 57 0 0 -72 6 23 17 31 21 29 44 -35 -72 1 49 -72 10 58 -70 43 3 -73 31 6 56 0 0 -72 15 23 17 31 23 29 45 -34 -72 10 51 -72 19 56 -70 52 35 -73 39 34 55 0 0 -72 24 2 17 31 24 28 46 -34 -72 19 31 -72 28 33 -71 1 43 -73 47 40 54 0 0 -72 32 19 17 31 26 28 47 -34 -72 27 50 -72 36 49 -71 10 30 -73 55 27 53 0 0 -72 40 16 17 31 28 28 48 -33 -72 35 49 -72 44 44 -71 18 55 -74 2 55 52 0 0 -72 47 53 17 31 29 27 49 -33 -72 43 27 -72 52 20 -71 26 59 -74 10 3 51 0 0 -72 55 11 17 31 31 27 50 -33 -72 50 46 -72 59 36 -71 34 42 -74 16 53 50 0 0 -73 2 9 17 31 33 27 51 -32 -72 57 46 -73 6 33 -71 42 6 -74 23 25 49 0 0 -73 8 49 17 31 34 26 52 -32 -73 4 27 -73 13 11 -71 49 10 -74 29 40 48 0 0 -73 15 11 17 31 36 26 53 -32 -73 10 50 -73 19 32 -71 55 55 -74 35 37 47 0 0 -73 21 14 17 31 37 26 54 -31 -73 16 55 -73 25 34 -72 2 21 -74 41 18 46 0 0 -73 27 1 17 31 38 26 55 -31 -73 22 42 -73 31 19 -72 8 28 -74 46 42 45 0 0 -73 32 30 17 31 40 25 56 -31 -73 28 13 -73 36 47 -72 14 18 -74 51 50 44 0 0 -73 37 42 17 31 41 25 57 -31 -73 33 26 -73 41 59 -72 19 50 -74 56 42 43 0 0 -73 42 38 17 31 43 25 58 -30 -73 38 23 -73 46 54 -72 25 4 -75 1 19 42 0 0 -73 47 18 17 31 44 24 59 -30 -73 43 4 -73 51 33 -72 30 2 -75 5 41 41 0 0 -73 51 43 17 31 45 24 60 -30 -73 47 29 -73 55 56 -72 34 42 -75 9 47 40 0 0 -73 55 51 17 31 46 24 61 -29 -73 51 39 -74 0 4 -72 39 7 -75 13 40 39 0 0 -73 59 44 17 31 48 24 62 -29 -73 55 33 -74 3 56 -72 43 15 -75 17 17 38 0 0 -74 3 22 17 31 49 23 63 -29 -73 59 12 -74 7 33 -72 47 7 -75 20 41 37 0 0 -74 6 46 17 31 50 23 64 -29 -74 2 36 -74 10 56 -72 50 43 -75 23 51 36 0 0 -74 9 54 17 31 51 23 65 -28 -74 5 45 -74 14 4 -72 54 4 -75 26 47 35 0 0 -74 12 48 17 31 53 23 66 -28 -74 8 40 -74 16 57 -72 57 9 -75 29 29 34 0 0 -74 15 28 17 31 54 22 67 -28 -74 11 20 -74 19 36 -72 59 59 -75 31 58 33 0 0 -74 17 54 17 31 55 22 68 -27 -74 13 46 -74 22 2 -73 2 34 -75 34 14 32 0 0 -74 20 5 17 31 56 22 69 -27 -74 15 58 -74 24 13 -73 4 54 -75 36 16 31 0 0 -74 22 3 17 31 57 21 70 -27 -74 17 56 -74 26 10 -73 7 0 -75 38 6 30 0 0 -74 23 47 17 31 58 21 71 -27 -74 19 40 -74 27 53 -73 8 50 -75 39 43 29 0 0 -74 25 17 17 31 59 21 72 -26 -74 21 11 -74 29 23 -73 10 27 -75 41 7 28 0 0 -74 26 33 17 32 0 21 73 -26 -74 22 28 -74 30 39 -73 11 48 -75 42 18 27 0 0 -74 27 36 17 32 1 20 74 -26 -74 23 31 -74 31 42 -73 12 56 -75 43 16 26 0 0 -74 28 26 17 32 2 20 75 -26 -74 24 21 -74 32 31 -73 13 49 -75 44 2 25 0 0 -74 29 2 17 32 3 20 76 -25 -74 24 57 -74 33 7 -73 14 28 -75 44 36 24 0 0 -74 29 25 17 32 4 20 77 -25 -74 25 20 -74 33 30 -73 14 52 -75 44 57 23 0 0 -74 29 34 17 32 5 19 78 -25 -74 25 29 -74 33 39 -73 15 2 -75 45 5 22 0 0 -74 29 30 17 32 6 19 79 -25 -74 25 25 -74 33 35 -73 14 58 -75 45 1 21 0 0 -74 29 13 17 32 7 19 80 -24 -74 25 8 -74 33 18 -73 14 40 -75 44 44 20 0 0 -74 28 42 17 32 8 19 81 -24 -74 24 37 -74 32 47 -73 14 8 -75 44 15 19 0 0 -74 27 58 17 32 9 18 81 -24 -74 23 53 -74 32 3 -73 13 21 -75 43 34 18 0 0 -74 27 0 17 32 10 18 82 -23 -74 22 55 -74 31 6 -73 12 20 -75 42 40 17 0 0 -74 25 49 17 32 11 18 83 -23 -74 21 43 -74 29 55 -73 11 5 -75 41 33 16 0 0 -74 24 24 17 32 12 18 84 -23 -74 20 18 -74 28 30 -73 9 35 -75 40 14 15 0 0 -74 22 46 17 32 13 17 85 -23 -74 18 39 -74 26 52 -73 7 51 -75 38 41 14 0 0 -74 20 54 17 32 13 17 86 -22 -74 16 47 -74 25 0 -73 5 52 -75 36 56 13 0 0 -74 18 47 17 32 14 17 87 -22 -74 14 40 -74 22 55 -73 3 38 -75 34 58 12 0 0 -74 16 27 17 32 15 16 88 -22 -74 12 20 -74 20 35 -73 1 9 -75 32 47 11 0 0 -74 13 53 17 32 16 16 89 -22 -74 9 45 -74 18 1 -72 58 25 -75 30 22 10 0 0 -74 11 4 17 32 17 16 90 -21 -74 6 56 -74 15 13 -72 55 27 -75 27 44 9 0 0 -74 8 1 17 32 18 16 91 -21 -74 3 52 -74 12 11 -72 52 12 -75 24 53 8 0 0 -74 4 43 17 32 19 15 92 -21 -74 0 33 -74 8 54 -72 48 42 -75 21 48 7 0 0 -74 1 11 17 32 19 15 93 -20 -73 57 0 -74 5 22 -72 44 57 -75 18 29 6 0 0 -73 57 23 17 32 20 15 94 -20 -73 53 11 -74 1 35 -72 40 55 -75 14 55 5 0 0 -73 53 20 17 32 21 15 95 -20 -73 49 8 -73 57 32 -72 36 37 -75 11 8 4 0 0 -73 49 1 17 32 22 14 96 -20 -73 44 48 -73 53 15 -72 32 3 -75 7 5 3 0 0 -73 44 27 17 32 23 14 97 -19 -73 40 13 -73 48 41 -72 27 12 -75 2 48 2 0 0 -73 39 36 17 32 23 14 98 -19 -73 35 21 -73 43 51 -72 22 4 -74 58 16 1 0 0 -73 34 29 17 32 24 13 99 -19 -73 30 13 -73 38 45 -72 16 38 -74 53 28 0 0 0 -73 29 5 17 32 25 13 100 -18 -73 24 48 -73 33 22 -72 10 55 -74 48 25 - 1 0 0 -73 23 24 17 32 26 13 101 -18 -73 19 6 -73 27 43 -72 4 53 -74 43 5 - 2 0 0 -73 17 26 17 32 26 13 102 -18 -73 13 6 -73 21 45 -71 58 34 -74 37 29 - 3 0 0 -73 11 9 17 32 27 12 103 -18 -73 6 49 -73 15 30 -71 51 55 -74 31 36 - 4 0 0 -73 4 35 17 32 28 12 104 -17 -73 0 13 -73 8 57 -71 44 57 -74 25 26 - 5 0 0 -72 57 42 17 32 28 12 105 -17 -72 53 18 -73 2 5 -71 37 40 -74 18 58 - 6 0 0 -72 50 30 17 32 29 11 106 -17 -72 46 5 -72 54 55 -71 30 2 -74 12 13 - 7 0 0 -72 42 58 17 32 30 11 107 -16 -72 38 31 -72 47 24 -71 22 4 -74 5 8 - 8 0 0 -72 35 6 17 32 30 11 108 -16 -72 30 38 -72 39 34 -71 13 45 -73 57 45 - 9 0 0 -72 26 53 17 32 31 10 109 -16 -72 22 24 -72 31 23 -71 5 4 -73 50 3 - 10 0 0 -72 18 20 17 32 32 10 109 -15 -72 13 49 -72 22 51 -70 56 1 -73 42 0 - 11 0 0 -72 9 24 17 32 32 10 110 -15 -72 4 51 -72 13 57 -70 46 35 -73 33 36 - 12 0 0 -72 0 7 17 32 33 9 111 -15 -71 55 32 -72 4 41 -70 36 46 -73 24 52 - 13 0 0 -71 50 26 17 32 34 9 112 -14 -71 45 50 -71 55 2 -70 26 33 -73 15 45 - 14 0 0 -71 40 22 17 32 34 9 113 -14 -71 35 43 -71 45 0 -70 15 55 -73 6 17 - 15 0 0 -71 29 53 17 32 35 8 114 -14 -71 25 13 -71 34 33 -70 4 52 -72 56 25 - 16 0 0 -71 18 59 17 32 35 8 115 -13 -71 14 17 -71 23 42 -69 53 22 -72 46 9 - 17 0 0 -71 7 40 17 32 36 7 116 -13 -71 2 56 -71 12 25 -69 41 26 -72 35 28 - 18 0 0 -70 55 54 17 32 36 7 117 -12 -70 51 8 -71 0 41 -69 29 2 -72 24 22 - 19 0 0 -70 43 41 17 32 37 7 118 -12 -70 38 52 -70 48 30 -69 16 10 -72 12 50 - 20 0 0 -70 30 59 17 32 37 6 119 -12 -70 26 9 -70 35 50 .. .. .. -72 0 51 - 21 0 0 -70 17 49 17 32 38 6 120 -11 -70 12 56 -70 22 42 .. .. .. -71 48 24 - 22 0 0 -70 4 8 17 32 38 6 121 -11 -69 59 13 -70 9 4 .. .. .. -71 35 28 - 23 0 0 -69 49 56 17 32 39 5 122 -10 -69 44 58 -69 54 54 .. .. .. -71 22 2 - 24 0 0 -69 35 12 17 32 39 5 123 -10 -69 30 12 -69 40 13 .. .. .. -71 8 6 - 25 0 0 -69 19 55 17 32 40 4 124 -10 -69 14 52 -69 24 58 .. .. .. -70 53 37 - 26 0 0 -69 4 4 17 32 40 4 125 -9 -68 58 59 -69 9 10 .. .. .. -70 38 36 - 27 0 0 -68 47 38 17 32 40 3 126 -9 -68 42 30 -68 52 46 .. .. .. -70 23 0 - 28 0 0 -68 30 35 17 32 41 3 126 -8 -68 25 24 -68 35 46 .. .. .. -70 6 48 - 29 0 0 -68 12 54 17 32 41 2 127 -8 -68 7 40 -68 18 8 .. .. .. -69 50 1 - 30 0 0 -67 54 34 17 32 41 2 128 -7 -67 49 18 -67 59 51 .. .. .. -69 32 35 - 31 0 0 -67 35 34 17 32 41 1 129 -7 -67 30 15 -67 40 54 .. .. .. -69 14 30 - 32 0 0 -67 15 53 17 32 41 1 130 -6 -67 10 31 -67 21 16 .. .. .. -68 55 44 - 33 0 0 -66 55 28 17 32 41 0 131 -6 -66 50 3 -67 0 54 .. .. .. -68 36 17 Uncertainty in time = +/- 11 secs Prediction of 2012 Jun 6.0 Data for the target star ------------------------ * name: TYC 6296-02022-1 * constellation : Sagittarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 19 18 28.9065 DE: -15 26 39.734 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .021, .022 ) * V mag [mag]: 9.9 * B mag [mag]: 11.1 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (11889) 1991 AH2 approx. diameter [km]: 13 approx. diameter ["]: .013 distance from Earth [AU]: 1.37000 * orbital information: orbit source: Preston date of fit: 2012 Jun 06 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 737 number of rejected observations: 1 time covered by the observations: 1991 Jan 07 - 2012 May 28 1 sigma uncertainty ellipse (major, minor, PA): 0.134, 0.062, 101° remarks: * orbital elements for (11889) 1991 AH2 : Mean anomaly = 327.22158643 deg Arg. of pericenter = 214.32613660 deg Long. of node = 120.89544804 deg Inclination = 19.10474829 deg Eccentricity = 0.17758912 Semimajor axis = 2.76249294 AU Perihelion dist = 2.27190425 AU Mag: H = 12.05, G = 0.15 Epoch of elements : MJD 56120.72600000 TDT (2012 Jul 12.726) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Jul 12 11889 1991 AH2 17h 25.1m UT 9.9 19 18 28.907-15 26 39.73TYC 6296-02022-1 11.1 15.0 13 1.1 1.370 -2.250 -28.24 97.3465 -15.437 -79.83 21.83 17.4176 0.33759 -0.38903 -5.06694 -4.39849 0.00020 -0.00061 2000 327.0657422012 712.00000214.326137120.895448 19.1047480.17758912 2.7624929 2.271904212.1 5.00.15 RATE 2.1466060 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.136 0.066 101 9.68 0.114 0 0-5-4 056084.0020120712_2022-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Jun 06, 02:35 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org