IOTA/IOTA-ES occultation update for (677) Aaltje / HIP 78083 event on 2012 Jul 01, 14:29 UT Visible from New Zealand, Australia, India Summary ------- On 2012 Jul 01 UT, the 33 km diameter asteroid (677) Aaltje will occult a 9.5 mag star in the constellation Scorpius for observers along a path across New Zealand, Australia, India. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.7 mag to 14.1 mag (the magnitude of the asteroid) for at most 4.8 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: 46 * date and approx. time of event: 2012 Jul 01, 14:14 - 2012 Jul 01, 14:43 UT * geocentric midpoint of event [JD]: 2456110.10409167 * magnitude of target star: 9.5 * magnitude drop [mag]: 4.7 * estimated maximum duration [s]: 4.8 * Moon: 93 % sunlit, 9° distance * Sun: 142° distance * rough path description: New Zealand, Australia, India The occultation path -------------------- * approximate projected width [km]: 33 * 1 sigma uncertainty interval [path widths]: +/- 1.40 * 1 sigma uncertainty interval [seconds]: +/- 6.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .031 +/- .033) * 1 sigma uncertainty ellipse (major, minor, PA): ( .033", .031", 1° ) * approx speed of asteroid's shadow [km/s]: 6.7274 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 78083 by 677 Aaltje on 2012 Jul 1 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 63 18 43 26 0 0 14 43 25 29 143 -1 63 32 40 63 4 46 64 11 41 62 25 38 64 21 35 25 0 0 14 43 14 31 144 -2 64 35 23 64 7 46 65 14 0 63 29 4 65 23 39 24 0 0 14 43 2 32 144 -4 65 37 19 65 9 59 66 15 34 64 31 39 66 25 1 23 0 0 14 42 50 33 144 -5 66 38 33 66 11 28 67 16 27 65 33 30 67 25 44 22 0 0 14 42 38 35 145 -6 67 39 9 67 12 18 68 16 44 66 34 39 68 25 52 21 0 0 14 42 25 36 145 -7 68 39 11 68 12 32 69 16 29 67 35 12 69 25 30 20 0 0 14 42 11 37 146 -9 69 38 43 69 12 16 70 15 45 68 35 12 70 24 41 19 0 0 14 41 58 39 146 -10 70 37 49 70 11 32 71 14 36 69 34 43 71 23 28 18 0 0 14 41 44 40 147 -11 71 36 31 71 10 24 72 13 5 70 33 49 72 21 54 17 0 0 14 41 29 41 147 -12 72 34 54 72 8 55 73 11 16 71 32 32 73 20 4 16 0 0 14 41 14 43 148 -14 73 33 0 73 7 8 74 9 12 72 30 57 74 18 0 15 0 0 14 40 59 44 148 -15 74 30 52 74 5 7 75 6 55 73 29 6 75 15 44 14 0 0 14 40 44 45 148 -16 75 28 34 75 2 55 76 4 28 74 27 2 76 13 21 13 0 0 14 40 28 46 149 -17 76 26 7 76 0 34 77 1 56 75 24 48 77 10 52 12 0 0 14 40 12 48 149 -18 77 23 36 76 58 7 77 59 19 76 22 27 78 8 20 11 0 0 14 39 55 49 150 -20 78 21 3 77 55 37 78 56 41 77 20 2 79 5 49 10 0 0 14 39 38 50 150 -21 79 18 31 78 53 7 79 54 6 78 17 36 80 3 20 9 0 0 14 39 21 52 151 -22 80 16 1 79 50 39 80 51 34 79 15 10 81 0 57 8 0 0 14 39 3 53 151 -23 81 13 38 80 48 17 81 49 10 80 12 49 81 58 42 7 0 0 14 38 45 54 152 -25 82 11 23 81 46 2 82 46 55 81 10 35 82 56 38 6 0 0 14 38 27 56 152 -26 83 9 20 82 43 58 83 44 53 82 8 30 83 54 48 5 0 0 14 38 9 57 153 -27 84 7 30 83 42 7 84 43 6 83 6 37 84 53 14 4 0 0 14 37 50 58 154 -29 85 5 57 84 40 32 85 41 37 84 4 59 85 52 0 3 0 0 14 37 30 59 154 -30 86 4 44 85 39 15 86 40 29 85 3 38 86 51 7 2 0 0 14 37 11 61 155 -31 87 3 54 86 38 20 87 39 44 86 2 38 87 50 39 1 0 0 14 36 51 62 156 -32 88 3 28 87 37 50 88 39 26 87 2 1 88 50 38 0 0 0 14 36 31 63 157 -34 89 3 31 88 37 47 89 39 37 88 1 50 89 51 9 - 1 0 0 14 36 11 65 157 -35 90 4 5 89 38 14 90 40 21 89 2 8 Latitude Latitude Latitude Latitude 90 0 0 - 1 8 44 14 36 8 65 158 -35 - 0 55 59 - 1 21 28 - 0 20 12 - 1 57 5 91 0 0 - 2 7 36 14 35 47 66 159 -36 - 1 54 54 - 2 20 17 - 1 19 18 - 2 55 43 92 0 0 - 3 5 52 14 35 27 67 160 -38 - 2 53 14 - 3 18 30 - 2 17 48 - 3 53 46 93 0 0 - 4 3 32 14 35 6 68 161 -39 - 3 50 58 - 4 16 5 - 3 15 42 - 4 51 11 94 0 0 - 5 0 33 14 34 46 70 162 -40 - 4 48 2 - 5 13 2 - 4 12 58 - 5 47 58 95 0 0 - 5 56 53 14 34 25 71 164 -41 - 5 44 26 - 6 9 18 - 5 9 33 - 6 44 3 96 0 0 - 6 52 30 14 34 5 72 166 -43 - 6 40 8 - 7 4 52 - 6 5 26 - 7 39 26 97 0 0 - 7 47 24 14 33 44 73 168 -44 - 7 35 6 - 7 59 42 - 7 0 35 - 8 34 5 98 0 0 - 8 41 33 14 33 23 74 170 -45 - 8 29 19 - 8 53 47 - 7 55 0 - 9 27 58 99 0 0 - 9 34 56 14 33 3 75 173 -46 - 9 22 46 - 9 47 6 - 8 48 39 -10 21 5 100 0 0 -10 27 31 14 32 43 76 176 -47 -10 15 25 -10 39 37 - 9 41 30 -11 13 25 101 0 0 -11 19 18 14 32 22 77 179 -48 -11 7 16 -11 31 19 -10 33 32 -12 4 56 102 0 0 -12 10 15 14 32 2 78 183 -50 -11 58 18 -12 22 12 -11 24 46 -12 55 37 103 0 0 -13 0 22 14 31 42 78 187 -51 -12 48 29 -13 12 15 -12 15 9 -13 45 28 104 0 0 -13 49 39 14 31 22 79 192 -52 -13 37 50 -14 1 27 -13 4 42 -14 34 28 105 0 0 -14 38 3 14 31 3 80 198 -53 -14 26 19 -14 49 48 -13 53 23 -15 22 37 106 0 0 -15 25 36 14 30 43 80 204 -54 -15 13 56 -15 37 16 -14 41 11 -16 9 54 107 0 0 -16 12 16 14 30 24 80 210 -55 -16 0 40 -16 23 52 -15 28 8 -16 56 18 108 0 0 -16 58 4 14 30 4 80 217 -56 -16 46 32 -17 9 35 -16 14 12 -17 41 49 109 0 0 -17 42 58 14 29 45 80 223 -57 -17 31 30 -17 54 26 -16 59 22 -18 26 28 110 0 0 -18 26 59 14 29 26 80 230 -58 -18 15 36 -18 38 22 -17 43 39 -19 10 13 111 0 0 -19 10 7 14 29 8 80 236 -59 -18 58 48 -19 21 26 -18 27 3 -19 53 5 112 0 0 -19 52 21 14 28 49 80 241 -60 -19 41 6 -20 3 36 -19 9 33 -20 35 4 113 0 0 -20 33 42 14 28 31 79 247 -61 -20 22 31 -20 44 53 -19 51 10 -21 16 9 114 0 0 -21 14 10 14 28 13 79 251 -62 -21 3 3 -21 25 17 -20 31 53 -21 56 21 115 0 0 -21 53 44 14 27 55 78 255 -63 -21 42 41 -22 4 47 -21 11 43 -22 35 40 116 0 0 -22 32 25 14 27 38 77 258 -64 -22 21 26 -22 43 24 -21 50 39 -23 14 6 117 0 0 -23 10 14 14 27 20 77 261 -65 -22 59 19 -23 21 8 -22 28 43 -23 51 39 118 0 0 -23 47 10 14 27 3 76 264 -66 -23 36 18 -23 58 0 -23 5 53 -24 28 20 119 0 0 -24 23 13 14 26 46 75 266 -67 -24 12 26 -24 34 0 -23 42 12 -25 4 9 120 0 0 -24 58 24 14 26 30 74 268 -68 -24 47 41 -25 9 7 -24 17 38 -25 39 6 121 0 0 -25 32 44 14 26 13 73 270 -68 -25 22 5 -25 43 23 -24 52 12 -26 13 11 122 0 0 -26 6 13 14 25 57 72 271 -69 -25 55 37 -26 16 48 -25 25 55 -26 46 26 123 0 0 -26 38 50 14 25 41 72 272 -70 -26 28 18 -26 49 22 -25 58 46 -27 18 50 124 0 0 -27 10 38 14 25 26 71 273 -71 -27 0 9 -27 21 6 -26 30 47 -27 50 23 125 0 0 -27 41 35 14 25 10 70 274 -72 -27 31 10 -27 52 0 -27 1 58 -28 21 7 126 0 0 -28 11 43 14 24 55 69 275 -72 -28 1 21 -28 22 4 -27 32 19 -28 51 2 127 0 0 -28 41 2 14 24 40 68 275 -73 -28 30 44 -28 51 20 -28 1 51 -29 20 8 128 0 0 -29 9 32 14 24 25 67 276 -74 -28 59 17 -29 19 46 -28 30 34 -29 48 25 129 0 0 -29 37 14 14 24 11 66 276 -74 -29 27 3 -29 47 25 -28 58 29 -30 15 55 130 0 0 -30 4 9 14 23 57 66 277 -75 -29 54 1 -30 14 17 -29 25 36 -30 42 38 131 0 0 -30 30 17 14 23 43 65 277 -75 -30 20 12 -30 40 22 -29 51 56 -31 8 34 132 0 0 -30 55 38 14 23 29 64 277 -76 -30 45 36 -31 5 40 -30 17 29 -31 33 43 133 0 0 -31 20 13 14 23 15 63 277 -76 -31 10 14 -31 30 12 -30 42 15 -31 58 7 134 0 0 -31 44 3 14 23 2 62 277 -77 -31 34 7 -31 53 59 -31 6 16 -32 21 46 135 0 0 -32 7 8 14 22 49 61 277 -77 -31 57 15 -32 17 1 -31 29 32 -32 44 40 136 0 0 -32 29 29 14 22 36 60 277 -77 -32 19 38 -32 39 19 -31 52 3 -33 6 50 137 0 0 -32 51 5 14 22 23 60 277 -78 -32 41 17 -33 0 52 -32 13 50 -33 28 16 138 0 0 -33 11 58 14 22 11 59 277 -78 -33 2 13 -33 21 43 -32 34 53 -33 48 59 139 0 0 -33 32 8 14 21 58 58 277 -78 -33 22 26 -33 41 51 -32 55 13 -34 8 59 140 0 0 -33 51 36 14 21 46 57 277 -78 -33 41 56 -34 1 16 -33 14 50 -34 28 18 141 0 0 -34 10 22 14 21 34 56 277 -78 -34 0 44 -34 19 59 -33 33 45 -34 46 54 142 0 0 -34 28 26 14 21 23 56 276 -78 -34 18 50 -34 38 1 -33 51 58 -35 4 50 143 0 0 -34 45 49 14 21 11 55 276 -78 -34 36 16 -34 55 22 -34 9 30 -35 22 4 144 0 0 -35 2 31 14 21 0 54 276 -78 -34 53 0 -35 12 2 -34 26 21 -35 38 38 145 0 0 -35 18 33 14 20 49 53 276 -78 -35 9 5 -35 28 2 -34 42 31 -35 54 32 146 0 0 -35 33 56 14 20 38 52 275 -77 -35 24 29 -35 43 22 -34 58 1 -36 9 47 147 0 0 -35 48 39 14 20 27 52 275 -77 -35 39 14 -35 58 4 -35 12 51 -36 24 23 148 0 0 -36 2 43 14 20 16 51 275 -77 -35 53 20 -36 12 6 -35 27 3 -36 38 20 149 0 0 -36 16 8 14 20 6 50 274 -76 -36 6 47 -36 25 29 -35 40 35 -36 51 38 150 0 0 -36 28 55 14 19 56 49 274 -76 -36 19 36 -36 38 15 -35 53 28 -37 4 19 151 0 0 -36 41 5 14 19 46 48 273 -76 -36 31 47 -36 50 22 -36 5 44 -37 16 22 152 0 0 -36 52 36 14 19 36 48 273 -75 -36 43 20 -37 1 52 -36 17 21 -37 27 48 153 0 0 -37 3 30 14 19 26 47 273 -75 -36 54 16 -37 12 45 -36 28 21 -37 38 36 154 0 0 -37 13 48 14 19 17 46 272 -74 -37 4 34 -37 23 1 -36 38 43 -37 48 48 155 0 0 -37 23 28 14 19 7 45 272 -74 -37 14 16 -37 32 40 -36 48 29 -37 58 24 156 0 0 -37 32 32 14 18 58 45 271 -73 -37 23 21 -37 41 43 -36 57 37 -38 7 23 157 0 0 -37 41 0 14 18 49 44 271 -73 -37 31 50 -37 50 9 -37 6 10 -38 15 47 158 0 0 -37 48 52 14 18 40 43 270 -72 -37 39 43 -37 58 0 -37 14 5 -38 23 34 159 0 0 -37 56 7 14 18 31 42 270 -72 -37 47 0 -38 5 15 -37 21 25 -38 30 46 160 0 0 -38 2 48 14 18 23 41 269 -71 -37 53 41 -38 11 54 -37 28 8 -38 37 23 161 0 0 -38 8 52 14 18 14 41 269 -70 -37 59 46 -38 17 58 -37 34 16 -38 43 25 162 0 0 -38 14 22 14 18 6 40 268 -70 -38 5 17 -38 23 27 -37 39 49 -38 48 52 163 0 0 -38 19 16 14 17 58 39 268 -69 -38 10 11 -38 28 20 -37 44 45 -38 53 43 164 0 0 -38 23 35 14 17 50 38 267 -69 -38 14 31 -38 32 39 -37 49 7 -38 58 0 165 0 0 -38 27 19 14 17 42 38 267 -68 -38 18 16 -38 36 22 -37 52 52 -39 1 42 166 0 0 -38 30 28 14 17 34 37 266 -67 -38 21 25 -38 39 31 -37 56 3 -39 4 50 167 0 0 -38 33 3 14 17 26 36 266 -67 -38 24 0 -38 42 5 -37 58 39 -39 7 23 168 0 0 -38 35 2 14 17 19 35 265 -66 -38 25 59 -38 44 4 -38 0 39 -39 9 21 169 0 0 -38 36 27 14 17 12 35 265 -65 -38 27 24 -38 45 29 -38 2 4 -39 10 45 170 0 0 -38 37 16 14 17 5 34 264 -65 -38 28 14 -38 46 18 -38 2 54 -39 11 35 171 0 0 -38 37 31 14 16 57 33 264 -64 -38 28 29 -38 46 33 -38 3 9 -39 11 50 172 0 0 -38 37 11 14 16 51 32 263 -63 -38 28 8 -38 46 13 -38 2 48 -39 11 30 173 0 0 -38 36 16 14 16 44 32 263 -63 -38 27 13 -38 45 18 -38 1 52 -39 10 35 174 0 0 -38 34 45 14 16 37 31 262 -62 -38 25 43 -38 43 48 -38 0 21 -39 9 6 175 0 0 -38 32 40 14 16 31 30 261 -61 -38 23 37 -38 41 43 -37 58 14 -39 7 2 176 0 0 -38 29 59 14 16 24 29 261 -61 -38 20 55 -38 39 3 -37 55 32 -39 4 23 177 0 0 -38 26 43 14 16 18 29 260 -60 -38 17 38 -38 35 47 -37 52 13 -39 1 8 178 0 0 -38 22 51 14 16 12 28 260 -59 -38 13 46 -38 31 55 -37 48 19 -38 57 19 179 0 0 -38 18 23 14 16 6 27 259 -59 -38 9 17 -38 27 28 -37 43 48 -38 52 53 180 0 0 -38 13 18 14 16 0 26 259 -58 -38 4 12 -38 22 24 -37 38 41 -38 47 52 -179 0 0 -38 7 38 14 15 54 26 258 -57 -37 58 31 -38 16 45 -37 32 57 -38 42 15 -178 0 0 -38 1 21 14 15 49 25 257 -57 -37 52 12 -38 10 29 -37 26 36 -38 36 1 -177 0 0 -37 54 26 14 15 44 24 257 -56 -37 45 17 -38 3 35 -37 19 38 -38 29 11 -176 0 0 -37 46 55 14 15 38 23 256 -55 -37 37 44 -37 56 5 -37 12 2 -38 21 44 -175 0 0 -37 38 46 14 15 33 22 256 -54 -37 29 34 -37 47 57 -37 3 48 -38 13 40 -174 0 0 -37 29 59 14 15 28 22 255 -54 -37 20 46 -37 39 12 -36 54 56 -38 4 58 -173 0 0 -37 20 33 14 15 23 21 255 -53 -37 11 19 -37 29 48 -36 45 25 -37 55 38 -172 0 0 -37 10 29 14 15 19 20 254 -52 -37 1 13 -37 19 45 -36 35 14 -37 45 40 -171 0 0 -36 59 45 14 15 14 19 253 -52 -36 50 28 -37 9 3 -36 24 24 -37 35 2 -170 0 0 -36 48 22 14 15 10 18 253 -51 -36 39 3 -36 57 41 -36 12 54 -37 23 45 -169 0 0 -36 36 19 14 15 5 18 252 -50 -36 26 57 -36 45 40 -36 0 44 -37 11 49 -168 0 0 -36 23 34 14 15 1 17 252 -49 -36 14 11 -36 32 57 -35 47 52 -36 59 12 -167 0 0 -36 10 9 14 14 57 16 251 -48 -36 0 43 -36 19 34 -35 34 19 -36 45 54 -166 0 0 -35 56 1 14 14 54 15 251 -48 -35 46 34 -36 5 28 -35 20 3 -36 31 55 -165 0 0 -35 41 11 14 14 50 14 250 -47 -35 31 41 -35 50 40 -35 5 4 -36 17 13 -164 0 0 -35 25 38 14 14 47 13 250 -46 -35 16 6 -35 35 10 -34 49 22 -36 1 49 -163 0 0 -35 9 21 14 14 43 13 249 -45 -34 59 46 -35 18 55 -34 32 56 -35 45 41 -162 0 0 -34 52 20 14 14 40 12 248 -45 -34 42 42 -35 1 56 -34 15 45 -35 28 50 -161 0 0 -34 34 33 14 14 38 11 248 -44 -34 24 53 -34 44 12 -33 57 48 -35 11 13 -160 0 0 -34 16 0 14 14 35 10 247 -43 -34 6 18 -34 25 43 -33 39 4 -34 52 51 -159 0 0 -33 56 41 14 14 32 9 247 -42 -33 46 55 -34 6 26 -33 19 34 -34 33 43 -158 0 0 -33 36 34 14 14 30 8 246 -41 -33 26 45 -33 46 22 -32 59 15 -34 13 48 -157 0 0 -33 15 39 14 14 28 7 246 -40 -33 5 47 -33 25 30 -32 38 8 -33 53 4 -156 0 0 -32 53 54 14 14 26 6 245 -40 -32 43 59 -33 3 49 -32 16 11 -33 31 32 -155 0 0 -32 31 20 14 14 25 6 245 -39 -32 21 21 -32 41 18 -31 53 23 -33 9 10 -154 0 0 -32 7 54 14 14 23 5 244 -38 -31 57 52 -32 17 55 -31 29 44 -32 45 58 -153 0 0 -31 43 36 14 14 22 4 244 -37 -31 33 31 -31 53 41 -31 5 13 -32 21 54 -152 0 0 -31 18 25 14 14 21 3 243 -36 -31 8 16 -31 28 34 -30 39 48 -31 56 57 -151 0 0 -30 52 21 14 14 20 2 243 -35 -30 42 8 -31 2 34 -30 13 28 -31 31 7 -150 0 0 -30 25 21 14 14 20 1 242 -34 -30 15 4 -30 35 38 -29 46 13 -31 4 23 Uncertainty in time = +/- 7 secs Prediction of 2012 Jun 21.0 Data for the target star ------------------------ * name: HIP 78083 * constellation : Scorpius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 15 56 37.5989 DE: -24 20 09.722 * position source: mpos:UCAC2 pm:UCAC2 plx:HIP2 * standard error: RA,DE ["]: ( .023, .030 ) * V mag [mag]: 9.5 * B mag [mag]: 9.9 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (677) Aaltje approx. diameter [km]: 33 approx. diameter ["]: .023 distance from Earth [AU]: 2.01200 * orbital information: orbit source: Preston date of fit: 2012 Jun 20 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 995 number of rejected observations: 73 time covered by the observations: 1906 Aug 13 - 2012 Jun 19 1 sigma uncertainty ellipse (major, minor, PA): 0.021, 0.014, 94° remarks: * orbital elements for (677) Aaltje : Mean anomaly = 57.93694220 deg Arg. of pericenter = 278.54879044 deg Long. of node = 272.87159485 deg Inclination = 8.48732296 deg Eccentricity = 0.05048354 Semimajor axis = 2.95571152 AU Perihelion dist = 2.80649673 AU Mag: H = 9.48, G = 0.15 Epoch of elements : MJD 56109.60400000 TDT (2012 Jul 01.604) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Jul 1 677 Aaltje 14h 29.9m UT 9.5 15 56 37.599-24 20 9.72HIP 78083 9.9 14.1 33 4.8 2.012 -0.892 11.23 101.6355 -24.339 -36.48 23.05 14.4982 0.11193 0.12065 -2.79324 2.57215 0.00341 -0.00041 2000 56.0741552012 622.00000278.548790272.871595 8.4873230.05048354 2.9557115 2.8064967 9.5 5.00.15 RATE 1.9395950 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.033 0.031 1 2.40 0.032 0 0-1-2 056099.0020120701__78083 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Jun 20, 22:41 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org