IOTA/IOTA-ES occultation update for (1222) Tina / TYC 2308-00989-1 event on 2012 Oct 16, 10:55 UT Visible from USA, Hawaii, E Australia Summary ------- On 2012 Oct 16 UT, the 26 km diameter asteroid (1222) Tina will occult a 8.2 mag star in the constellation Triangulum for observers along a path across USA, Hawaii, E Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 5.8 mag to 14.0 mag (the magnitude of the asteroid) for at most 2.1 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: . The event at a glimpse ---------------------- * Rank: 33 * date and approx. time of event: 2012 Oct 16, 10:47 - 2012 Oct 16, 11:04 UT * geocentric midpoint of event [JD]: 2456216.9552625 * magnitude of target star: 8.2 * magnitude drop [mag]: 5.8 * estimated maximum duration [s]: 2.1 * Moon: 1 % sunlit, 164° distance * Sun: 157° distance * rough path description: USA, Hawaii, E Australia The occultation path -------------------- * approximate projected width [km]: 26 * 1 sigma uncertainty interval [path widths]: +/- 2.05 * 1 sigma uncertainty interval [seconds]: +/- 4.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .052 +/- .041) * 1 sigma uncertainty ellipse (major, minor, PA): ( .052", .041", 89° ) * approx speed of asteroid's shadow [km/s]: 12.3809 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2308-00989-1 by 1222 Tina on 2012 Oct 16 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 138 36 51 -39 0 0 11 4 4 1 48 -22 138 23 20 138 50 21 137 27 34 139 45 26 139 59 38 -38 0 0 11 4 4 2 47 -24 139 46 27 140 12 48 138 52 9 141 6 30 141 19 34 -37 0 0 11 4 3 4 46 -25 141 6 42 141 32 25 140 13 43 142 24 51 142 36 54 -36 0 0 11 4 2 5 45 -26 142 24 19 142 49 27 141 32 33 143 40 45 143 51 52 -35 0 0 11 4 1 7 44 -28 143 39 33 144 4 10 142 48 53 144 54 23 145 4 40 -34 0 0 11 3 59 8 44 -29 144 52 36 145 16 43 144 2 58 146 5 58 146 15 30 -33 0 0 11 3 57 9 43 -31 146 3 40 146 27 20 145 14 58 147 15 41 147 24 32 -32 0 0 11 3 55 11 42 -32 147 12 54 147 36 9 146 25 5 148 23 39 148 31 54 -31 0 0 11 3 52 12 42 -33 148 20 28 148 43 20 147 33 27 149 30 4 149 37 45 -30 0 0 11 3 50 14 41 -35 149 26 30 149 49 0 148 40 13 150 35 1 150 42 12 -29 0 0 11 3 47 15 41 -36 150 31 7 150 53 17 149 45 32 151 38 38 151 45 23 -28 0 0 11 3 43 16 40 -37 151 34 26 151 56 18 150 49 30 152 41 2 152 47 22 -27 0 0 11 3 40 18 40 -39 152 36 35 152 58 9 151 52 14 153 42 18 153 48 17 -26 0 0 11 3 36 19 39 -40 153 37 37 153 58 56 152 53 50 154 42 33 154 48 12 -25 0 0 11 3 32 20 39 -41 154 37 40 154 58 44 153 54 24 155 41 51 155 47 13 -24 0 0 11 3 28 22 38 -43 155 36 48 155 57 39 154 54 1 156 40 18 156 45 25 -23 0 0 11 3 23 23 38 -44 156 35 6 156 55 43 155 52 45 157 37 57 157 42 51 -22 0 0 11 3 19 24 38 -45 157 32 38 157 53 4 156 50 41 158 34 54 158 39 35 -21 0 0 11 3 14 26 37 -47 158 29 28 158 49 43 157 47 54 159 31 11 159 35 43 -20 0 0 11 3 8 27 37 -48 159 25 40 159 45 45 158 44 27 160 26 54 160 31 16 -19 0 0 11 3 3 28 37 -49 160 21 18 160 41 14 159 40 24 161 22 5 161 26 20 -18 0 0 11 2 57 29 36 -50 161 16 26 161 36 14 160 35 49 162 16 47 162 20 57 -17 0 0 11 2 51 31 36 -52 162 11 7 162 30 47 161 30 46 163 11 5 163 15 10 -16 0 0 11 2 45 32 36 -53 163 5 23 163 24 56 162 25 17 164 5 1 164 9 2 -15 0 0 11 2 39 33 35 -54 163 59 19 164 18 46 163 19 25 164 58 38 165 2 37 -14 0 0 11 2 32 35 35 -56 164 52 56 165 12 18 164 13 15 165 51 59 165 55 57 -13 0 0 11 2 25 36 35 -57 165 46 19 166 5 35 165 6 47 166 45 7 166 49 5 -12 0 0 11 2 18 37 34 -58 166 39 29 166 58 41 166 0 6 167 38 4 167 42 4 -11 0 0 11 2 11 39 34 -59 167 32 29 167 51 38 166 53 14 168 30 54 168 34 55 -10 0 0 11 2 4 40 34 -61 168 25 23 168 44 28 167 46 14 169 23 39 169 27 43 - 9 0 0 11 1 56 41 34 -62 169 18 12 169 37 15 168 39 8 170 16 21 170 20 29 - 8 0 0 11 1 48 42 33 -63 170 10 59 170 30 0 169 31 59 171 9 3 171 13 17 - 7 0 0 11 1 40 44 33 -65 171 3 46 171 22 47 170 24 50 172 1 47 172 6 7 - 6 0 0 11 1 32 45 33 -66 171 56 37 172 15 37 171 17 42 172 54 36 172 59 4 - 5 0 0 11 1 23 46 33 -67 172 49 34 173 8 34 172 10 39 173 47 33 173 52 9 - 4 0 0 11 1 15 48 32 -68 173 42 39 174 1 39 173 3 43 174 40 40 174 45 25 - 3 0 0 11 1 6 49 32 -70 174 35 55 174 54 56 173 56 57 175 34 0 175 38 55 - 2 0 0 11 0 57 50 32 -71 175 29 23 175 48 27 174 50 22 176 27 34 176 32 41 - 1 0 0 11 0 48 51 32 -72 176 23 8 176 42 14 175 44 2 177 21 27 177 26 46 0 0 0 11 0 38 53 31 -74 177 17 11 177 36 20 176 38 0 178 15 40 178 21 12 1 0 0 11 0 29 54 31 -75 178 11 36 178 30 48 177 32 17 179 10 15 Latitude Latitude Latitude Latitude 179 0 0 1 42 30 11 0 22 55 31 -76 1 53 1 1 31 59 2 36 3 0 48 46 180 0 0 2 47 45 11 0 11 56 30 -77 2 58 13 2 37 16 3 41 3 1 54 15 -179 0 0 3 52 22 11 0 0 58 30 -78 4 2 47 3 41 56 4 45 25 2 59 8 -178 0 0 4 56 19 10 59 49 59 30 -80 5 6 41 4 45 57 5 49 6 4 3 22 -177 0 0 5 59 33 10 59 38 61 29 -81 6 9 51 5 49 14 6 52 3 5 6 53 -176 0 0 7 2 1 10 59 27 62 29 -82 7 12 16 6 51 46 7 54 14 6 9 39 -175 0 0 8 3 42 10 59 16 63 28 -83 8 13 54 7 53 30 8 55 37 7 11 38 -174 0 0 9 4 33 10 59 4 65 27 -84 9 14 41 8 54 24 9 56 9 8 12 47 -173 0 0 10 4 31 10 58 53 66 27 -85 10 14 35 9 54 26 10 55 49 9 13 4 -172 0 0 11 3 36 10 58 42 67 26 -86 11 13 36 10 53 35 11 54 35 10 12 28 -171 0 0 12 1 45 10 58 31 68 25 -86 12 11 41 11 51 48 12 52 25 11 10 57 -170 0 0 12 58 57 10 58 19 70 24 -86 13 8 50 12 49 4 13 49 17 12 8 29 -169 0 0 13 55 11 10 58 8 71 23 -85 14 5 0 13 45 22 14 45 11 13 5 2 -168 0 0 14 50 25 10 57 57 72 22 -84 15 0 10 14 40 40 15 40 6 14 0 37 -167 0 0 15 44 40 10 57 46 73 20 -83 15 54 21 15 34 58 16 34 0 14 55 12 -166 0 0 16 37 53 10 57 35 74 19 -82 16 47 30 16 28 16 17 26 53 15 48 46 -165 0 0 17 30 4 10 57 24 76 17 -81 17 39 37 17 20 31 18 18 44 16 41 18 -164 0 0 18 21 14 10 57 13 77 14 -80 18 30 43 18 11 44 19 9 33 17 32 47 -163 0 0 19 11 20 10 57 2 78 12 -79 19 20 45 19 1 55 19 59 19 18 23 15 -162 0 0 20 0 24 10 56 51 79 8 -78 20 9 45 19 51 3 20 48 3 19 12 39 -161 0 0 20 48 25 10 56 40 79 5 -77 20 57 42 20 39 7 21 35 43 20 1 0 -160 0 0 21 35 22 10 56 30 80 0 -75 21 44 35 21 26 9 22 22 20 20 48 18 -159 0 0 22 21 17 10 56 19 81 355 -74 22 30 26 22 12 7 23 7 55 21 34 32 -158 0 0 23 6 8 10 56 9 81 349 -73 23 15 14 22 57 3 23 52 27 22 19 44 -157 0 0 23 49 57 10 55 59 82 342 -72 23 58 59 23 40 56 24 35 56 23 3 53 -156 0 0 24 32 44 10 55 49 82 334 -71 24 41 41 24 23 46 25 18 23 23 46 59 -155 0 0 25 14 29 10 55 39 82 326 -70 25 23 22 25 5 35 25 59 48 24 29 4 -154 0 0 25 55 12 10 55 29 82 318 -69 26 4 1 25 46 22 26 40 12 25 10 6 -153 0 0 26 34 54 10 55 19 82 310 -68 26 43 40 26 26 7 27 19 35 25 50 7 -152 0 0 27 13 35 10 55 9 82 303 -67 27 22 18 27 4 52 27 57 58 26 29 7 -151 0 0 27 51 17 10 55 0 81 297 -66 27 59 55 27 42 38 28 35 21 27 7 8 -150 0 0 28 27 59 10 54 51 81 291 -65 28 36 34 28 19 23 29 11 45 27 44 8 -149 0 0 29 3 42 10 54 41 80 286 -64 29 12 14 28 55 11 29 47 10 28 20 10 -148 0 0 29 38 28 10 54 32 80 282 -63 29 46 56 29 30 0 30 21 39 28 55 13 -147 0 0 30 12 16 10 54 23 79 279 -62 30 20 41 30 3 51 30 55 10 29 29 19 -146 0 0 30 45 8 10 54 15 78 276 -61 30 53 30 30 36 47 31 27 44 30 2 28 -145 0 0 31 17 4 10 54 6 77 274 -60 31 25 23 31 8 46 31 59 24 30 34 40 -144 0 0 31 48 5 10 53 57 77 272 -59 31 56 20 31 39 50 32 30 9 31 5 58 -143 0 0 32 18 12 10 53 49 76 270 -58 32 26 24 32 10 0 32 59 59 31 36 21 -142 0 0 32 47 25 10 53 40 75 269 -57 32 55 34 32 39 16 33 28 57 32 5 50 -141 0 0 33 15 46 10 53 32 74 268 -56 33 23 52 33 7 40 33 57 2 32 34 26 -140 0 0 33 43 15 10 53 24 73 267 -55 33 51 17 33 35 11 34 24 16 33 2 9 -139 0 0 34 9 52 10 53 16 73 266 -54 34 17 52 34 1 52 34 50 39 33 29 1 -138 0 0 34 35 39 10 53 8 72 265 -53 34 43 36 34 27 41 35 16 11 33 55 3 -137 0 0 35 0 36 10 53 1 71 265 -52 35 8 31 34 52 41 35 40 55 34 20 14 -136 0 0 35 24 45 10 52 53 70 265 -52 35 32 36 35 16 53 36 4 50 34 44 36 -135 0 0 35 48 5 10 52 46 69 264 -51 35 55 54 35 40 15 36 27 57 35 8 9 -134 0 0 36 10 37 10 52 38 68 264 -50 36 18 24 36 2 51 36 50 17 35 30 55 -133 0 0 36 32 23 10 52 31 68 264 -49 36 40 8 36 24 39 37 11 50 35 52 53 -132 0 0 36 53 23 10 52 24 67 264 -48 37 1 5 36 45 41 37 32 38 36 14 5 -131 0 0 37 13 38 10 52 17 66 264 -47 37 21 18 37 5 58 37 52 41 36 34 31 -130 0 0 37 33 8 10 52 10 65 264 -46 37 40 45 37 25 30 38 12 0 36 54 13 -129 0 0 37 51 54 10 52 3 64 264 -46 37 59 29 37 44 18 38 30 35 37 13 9 -128 0 0 38 9 56 10 51 56 64 264 -45 38 17 29 38 2 23 38 48 26 37 31 22 -127 0 0 38 27 16 10 51 50 63 264 -44 38 34 47 38 19 44 39 5 36 37 48 52 -126 0 0 38 43 53 10 51 43 62 265 -43 38 51 22 38 36 24 39 22 4 38 5 39 -125 0 0 38 59 49 10 51 37 61 265 -42 39 7 16 38 52 21 39 37 50 38 21 45 -124 0 0 39 15 4 10 51 31 61 265 -42 39 22 29 39 7 38 39 52 55 38 37 8 -123 0 0 39 29 38 10 51 24 60 265 -41 39 37 2 39 22 13 40 7 21 38 51 51 -122 0 0 39 43 32 10 51 18 59 266 -40 39 50 54 39 36 9 40 21 7 39 5 53 -121 0 0 39 56 46 10 51 12 58 266 -39 40 4 7 39 49 25 40 34 13 39 19 16 -120 0 0 40 9 21 10 51 6 57 266 -39 40 16 41 40 2 2 40 46 41 39 31 59 -119 0 0 40 21 18 10 51 0 57 267 -38 40 28 36 40 14 0 40 58 30 39 44 3 -118 0 0 40 32 37 10 50 54 56 267 -37 40 39 53 40 25 20 41 9 42 39 55 28 -117 0 0 40 43 17 10 50 49 55 268 -36 40 50 33 40 36 2 41 20 16 40 6 15 -116 0 0 40 53 21 10 50 43 54 268 -35 41 0 35 40 46 6 41 30 13 40 16 25 -115 0 0 41 2 47 10 50 38 54 269 -35 41 10 0 40 55 34 41 39 34 40 25 57 -114 0 0 41 11 36 10 50 32 53 269 -34 41 18 48 41 4 24 41 48 18 40 34 51 -113 0 0 41 19 49 10 50 27 52 269 -33 41 27 0 41 12 38 41 56 26 40 43 9 -112 0 0 41 27 26 10 50 21 52 270 -33 41 34 36 41 20 16 42 3 58 40 50 51 -111 0 0 41 34 27 10 50 16 51 270 -32 41 41 36 41 27 18 42 10 55 40 57 56 -110 0 0 41 40 52 10 50 11 50 271 -31 41 48 1 41 33 44 42 17 16 41 4 26 -109 0 0 41 46 42 10 50 6 49 271 -30 41 53 50 41 39 34 42 23 2 41 10 19 -108 0 0 41 51 57 10 50 1 49 272 -30 41 59 4 41 44 50 42 28 14 41 15 37 -107 0 0 41 56 37 10 49 56 48 273 -29 42 3 43 41 49 30 42 32 51 41 20 20 -106 0 0 42 0 41 10 49 51 47 273 -28 42 7 47 41 53 35 42 36 53 41 24 27 -105 0 0 42 4 12 10 49 46 46 274 -27 42 11 17 41 57 6 42 40 21 41 27 59 -104 0 0 42 7 7 10 49 41 46 274 -27 42 14 12 42 0 2 42 43 15 41 30 56 -103 0 0 42 9 28 10 49 37 45 275 -26 42 16 33 42 2 23 42 45 34 41 33 19 -102 0 0 42 11 14 10 49 32 44 275 -25 42 18 19 42 4 10 42 47 20 41 35 6 -101 0 0 42 12 27 10 49 27 44 276 -25 42 19 31 42 5 22 42 48 31 41 36 19 -100 0 0 42 13 4 10 49 23 43 276 -24 42 20 9 42 6 0 42 49 8 41 36 57 - 99 0 0 42 13 8 10 49 18 42 277 -23 42 20 12 42 6 3 42 49 12 41 37 0 - 98 0 0 42 12 36 10 49 14 41 278 -22 42 19 41 42 5 32 42 48 41 41 36 29 - 97 0 0 42 11 31 10 49 10 41 278 -22 42 18 36 42 4 26 42 47 36 41 35 22 - 96 0 0 42 9 51 10 49 5 40 279 -21 42 16 56 42 2 46 42 45 57 41 33 41 - 95 0 0 42 7 36 10 49 1 39 279 -20 42 14 41 42 0 30 42 43 44 41 31 25 - 94 0 0 42 4 46 10 48 57 39 280 -20 42 11 52 41 57 41 42 40 56 41 28 33 - 93 0 0 42 1 22 10 48 53 38 281 -19 42 8 28 41 54 16 42 37 34 41 25 7 - 92 0 0 41 57 23 10 48 49 37 281 -18 42 4 29 41 50 16 42 33 37 41 21 5 - 91 0 0 41 52 48 10 48 45 36 282 -17 41 59 55 41 45 41 42 29 5 41 16 27 - 90 0 0 41 47 38 10 48 41 36 282 -17 41 54 46 41 40 30 42 23 59 41 11 14 - 89 0 0 41 41 52 10 48 37 35 283 -16 41 49 0 41 34 43 42 18 17 41 5 24 - 88 0 0 41 35 30 10 48 33 34 284 -15 41 42 39 41 28 21 42 11 59 40 58 58 - 87 0 0 41 28 32 10 48 29 33 284 -14 41 35 42 41 21 22 42 5 5 40 51 55 - 86 0 0 41 20 57 10 48 26 33 285 -14 41 28 9 41 13 46 41 57 36 40 44 16 - 85 0 0 41 12 46 10 48 22 32 285 -13 41 19 58 41 5 34 41 49 29 40 35 59 - 84 0 0 41 3 57 10 48 18 31 286 -12 41 11 11 40 56 44 41 40 46 40 27 5 - 83 0 0 40 54 31 10 48 15 30 287 -11 41 1 45 40 47 16 41 31 26 40 17 32 - 82 0 0 40 44 26 10 48 11 30 287 -11 40 51 42 40 37 10 41 21 28 40 7 21 - 81 0 0 40 33 44 10 48 8 29 288 -10 40 41 1 40 26 26 41 10 52 39 56 32 - 80 0 0 40 22 22 10 48 5 28 288 -9 40 29 40 40 15 3 40 59 37 39 45 3 - 79 0 0 40 10 20 10 48 1 27 289 -8 40 17 40 40 3 0 40 47 44 39 32 54 - 78 0 0 39 57 39 10 47 58 26 290 -8 40 5 1 39 50 17 40 35 10 39 20 4 - 77 0 0 39 44 17 10 47 55 26 290 -7 39 51 41 39 36 54 40 21 57 39 6 34 - 76 0 0 39 30 14 10 47 52 25 291 -6 39 37 39 39 22 49 40 8 3 38 52 22 - 75 0 0 39 15 30 10 47 49 24 291 -5 39 22 57 39 8 3 39 53 28 38 37 28 - 74 0 0 39 0 3 10 47 46 23 292 -4 39 7 32 38 52 34 39 38 11 38 21 51 - 73 0 0 38 43 53 10 47 43 22 293 -4 38 51 24 38 36 22 39 22 11 38 5 31 - 72 0 0 38 26 59 10 47 40 22 293 -3 38 34 32 38 19 26 39 5 28 37 48 27 - 71 0 0 38 9 21 10 47 37 21 294 -2 38 16 56 38 1 46 38 48 1 37 30 38 - 70 0 0 37 50 58 10 47 35 20 294 -1 37 58 36 37 43 21 38 29 49 37 12 3 - 69 0 0 37 31 49 10 47 32 19 295 0 37 39 29 37 24 9 38 10 52 36 52 42 Uncertainty in time = +/- 5 secs Prediction of 2012 Oct 8.0 Data for the target star ------------------------ * name: TYC 2308-00989-1 * constellation : Triangulum * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 01 57 12.0021 DE: +31 03 46.846 * position source: mpos:TYC pm:TYC * standard error: RA,DE ["]: ( .035, .033 ) * V mag [mag]: 8.2 * B mag [mag]: 9.2 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1222) Tina approx. diameter [km]: 26 approx. diameter ["]: .022 distance from Earth [AU]: 1.63400 * orbital information: orbit source: Preston date of fit: 2012 Oct 07 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 833 number of rejected observations: 20 time covered by the observations: 1932 Jun 11 - 2012 Oct 03 1 sigma uncertainty ellipse (major, minor, PA): 0.038, 0.024, 89° remarks: * orbital elements for (1222) Tina : Mean anomaly = 58.45811499 deg Arg. of pericenter = 58.72952142 deg Long. of node = 246.09864317 deg Inclination = 19.65830678 deg Eccentricity = 0.24669981 Semimajor axis = 2.79456682 AU Perihelion dist = 2.10514771 AU Mag: H = 11.15, G = 0.15 Epoch of elements : MJD 56216.45500000 TDT (2012 Oct 16.455) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Oct 16 1222 Tina 10h 55.6m UT 8.2 1 57 12.002 31 3 46.85TYC 2308-00989-1 9.2 14.0 26 2.1 1.634 -2.227 -24.43 -159.9584 31.070 12.48 -9.12 10.9263 0.08138 -0.09834 -5.31554 -4.53637 -0.00076 -0.00213 2000 57.09626720121010.00000 58.729521246.098643 19.6583070.24669981 2.7945668 2.105147710.3 5.00.15 RATE 2.1097570 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.052 0.041 89 3.05 0.045 0 0 1-4 056208.0020121016_0989-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Oct 07, 18:54 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org