IOTA/IOTA-ES occultation update for (923) Herluga / 2UCAC 30937342 event on 2012 Nov 19, 21:21 UT Visible from Japan, China, Russia Summary ------- On 2012 Nov 19 UT, the 35 km diameter asteroid (923) Herluga will occult a 12.0 mag star in the constellation Pisces for observers along a path across Japan, China, Russia. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.2 mag to 15.1 mag (the magnitude of the asteroid) for at most 4.6 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: 48 * date and approx. time of event: 2012 Nov 19, 12:10 - 2012 Nov 19, 12:29 UT * geocentric midpoint of event [JD]: 2456251.01371667 * magnitude of target star: 12.0 * magnitude drop [mag]: 3.2 * estimated maximum duration [s]: 4.6 * Moon: 39 % sunlit, 41° distance * Sun: 118° distance * rough path description: Japan, China, Russia The occultation path -------------------- * approximate projected width [km]: 52 * 1 sigma uncertainty interval [path widths]: +/- 1.35 * 1 sigma uncertainty interval [seconds]: +/- 5.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .040 +/- .045) * 1 sigma uncertainty ellipse (major, minor, PA): ( .045", .040", 359° ) * approx speed of asteroid's shadow [km/s]: 7.6342 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of 2UCAC 30937342 by 923 Herluga on 2012 Nov 19 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 31 0 0 69 26 51 12 10 29 0 97 -3 69 12 39 .. .. .. .. .. .. .. .. .. 32 0 0 69 24 8 12 10 29 0 98 -3 69 9 54 69 38 25 .. .. .. 70 17 21 33 0 0 69 21 11 12 10 30 1 99 -3 69 6 57 69 35 30 .. .. .. 70 14 29 34 0 0 69 18 3 12 10 30 1 100 -3 69 3 47 69 32 22 .. .. .. 70 11 24 35 0 0 69 14 41 12 10 30 1 101 -4 69 0 24 69 29 2 .. .. .. 70 8 7 36 0 0 69 11 7 12 10 30 2 102 -4 68 56 49 69 25 29 .. .. .. 70 4 37 37 0 0 69 7 20 12 10 30 2 103 -4 68 53 0 69 21 43 .. .. .. 70 0 55 38 0 0 69 3 19 12 10 31 3 104 -4 68 48 59 69 17 44 .. .. .. 69 57 0 39 0 0 68 59 6 12 10 31 3 105 -4 68 44 44 69 13 32 .. .. .. 69 52 52 40 0 0 68 54 40 12 10 31 3 105 -4 68 40 16 69 9 7 68 1 46 69 48 31 41 0 0 68 50 0 12 10 32 4 106 -5 68 35 35 69 4 29 67 57 0 69 43 57 42 0 0 68 45 7 12 10 33 4 107 -5 68 30 40 68 59 37 67 52 1 69 39 10 43 0 0 68 40 0 12 10 33 4 108 -5 68 25 32 68 54 32 67 46 48 69 34 10 44 0 0 68 34 39 12 10 34 5 109 -5 68 20 9 68 49 14 67 41 21 69 28 56 45 0 0 68 29 5 12 10 34 5 110 -5 68 14 33 68 43 41 67 35 40 69 23 29 46 0 0 68 23 17 12 10 35 6 111 -6 68 8 43 68 37 55 67 29 45 69 17 48 47 0 0 68 17 14 12 10 36 6 112 -6 68 2 38 68 31 54 67 23 35 69 11 53 48 0 0 68 10 57 12 10 37 6 113 -6 67 56 19 68 25 39 67 17 11 69 5 44 49 0 0 68 4 26 12 10 38 7 114 -6 67 49 46 68 19 10 67 10 32 68 59 21 50 0 0 67 57 40 12 10 39 7 115 -7 67 42 58 68 12 26 67 3 38 68 52 43 51 0 0 67 50 39 12 10 40 7 116 -7 67 35 55 68 5 28 66 56 29 68 45 51 52 0 0 67 43 23 12 10 41 8 117 -7 67 28 37 67 58 14 66 49 5 68 38 44 53 0 0 67 35 52 12 10 42 8 118 -7 67 21 3 67 50 46 66 41 25 68 31 22 54 0 0 67 28 6 12 10 44 9 119 -7 67 13 15 67 43 2 66 33 31 68 23 44 55 0 0 67 20 4 12 10 45 9 119 -8 67 5 10 67 35 2 66 25 20 68 15 52 56 0 0 67 11 46 12 10 47 9 120 -8 66 56 50 67 26 47 66 16 53 68 7 44 57 0 0 67 3 13 12 10 48 10 121 -8 66 48 14 67 18 17 66 8 11 67 59 20 58 0 0 66 54 24 12 10 50 10 122 -8 66 39 22 67 9 30 65 59 12 67 50 41 59 0 0 66 45 18 12 10 51 11 123 -9 66 30 14 67 0 27 65 49 56 67 41 45 60 0 0 66 35 55 12 10 53 11 124 -9 66 20 49 66 51 7 65 40 24 67 32 33 61 0 0 66 26 16 12 10 55 12 125 -9 66 11 7 66 41 31 65 30 35 67 23 5 62 0 0 66 16 20 12 10 57 12 126 -10 66 1 8 66 31 38 65 20 29 67 13 19 63 0 0 66 6 7 12 10 59 12 127 -10 65 50 52 66 21 27 65 10 6 67 3 17 64 0 0 65 55 37 12 11 1 13 128 -10 65 40 19 66 11 0 64 59 25 66 52 58 65 0 0 65 44 49 12 11 3 13 129 -10 65 29 29 66 0 15 64 48 27 66 42 21 66 0 0 65 33 44 12 11 6 14 130 -11 65 18 20 65 49 13 64 37 11 66 31 27 67 0 0 65 22 20 12 11 8 14 131 -11 65 6 54 65 37 52 64 25 37 66 20 15 68 0 0 65 10 39 12 11 11 15 132 -11 64 55 9 65 26 14 64 13 45 66 8 44 69 0 0 64 58 39 12 11 13 15 133 -12 64 43 6 65 14 17 64 1 34 65 56 56 70 0 0 64 46 20 12 11 16 16 134 -12 64 30 45 65 2 1 63 49 5 65 44 49 71 0 0 64 33 43 12 11 19 16 135 -12 64 18 5 64 49 27 63 36 17 65 32 23 72 0 0 64 20 47 12 11 22 16 136 -13 64 5 6 64 36 34 63 23 10 65 19 39 73 0 0 64 7 32 12 11 25 17 137 -13 63 51 48 64 23 22 63 9 44 65 6 35 74 0 0 63 53 58 12 11 28 17 138 -13 63 38 10 64 9 51 62 55 59 64 53 12 75 0 0 63 40 4 12 11 32 18 138 -14 63 24 13 63 56 0 62 41 54 64 39 30 76 0 0 63 25 50 12 11 35 18 139 -14 63 9 57 63 41 50 62 27 30 64 25 28 77 0 0 63 11 17 12 11 39 19 140 -15 62 55 21 63 27 19 62 12 46 64 11 7 78 0 0 62 56 24 12 11 42 19 141 -15 62 40 25 63 12 29 61 57 42 63 56 25 79 0 0 62 41 11 12 11 46 20 142 -15 62 25 8 62 57 19 61 42 18 63 41 23 80 0 0 62 25 37 12 11 50 20 143 -16 62 9 32 62 41 48 61 26 34 63 26 1 81 0 0 62 9 44 12 11 54 21 144 -16 61 53 35 62 25 58 61 10 29 63 10 18 82 0 0 61 53 29 12 11 59 21 145 -17 61 37 18 62 9 46 60 54 5 62 54 15 83 0 0 61 36 55 12 12 3 22 146 -17 61 20 41 61 53 14 60 37 20 62 37 51 84 0 0 61 19 59 12 12 8 22 147 -17 61 3 42 61 36 22 60 20 14 62 21 6 85 0 0 61 2 43 12 12 13 23 148 -18 60 46 24 61 19 9 60 2 48 62 4 1 86 0 0 60 45 6 12 12 18 23 149 -18 60 28 44 61 1 35 59 45 2 61 46 34 87 0 0 60 27 9 12 12 23 24 150 -19 60 10 44 60 43 40 59 26 55 61 28 47 88 0 0 60 8 51 12 12 28 24 151 -19 59 52 23 60 25 24 59 8 28 61 10 39 89 0 0 59 50 12 12 12 33 25 152 -20 59 33 42 60 6 48 58 49 40 60 52 9 90 0 0 59 31 12 12 12 39 25 153 -20 59 14 40 59 47 51 58 30 31 60 33 19 91 0 0 59 11 52 12 12 45 26 154 -21 58 55 17 59 28 33 58 11 2 60 14 8 92 0 0 58 52 11 12 12 51 26 156 -21 58 35 34 59 8 54 57 51 13 59 54 36 93 0 0 58 32 10 12 12 57 27 157 -22 58 15 31 58 48 55 57 31 4 59 34 43 94 0 0 58 11 48 12 13 3 27 158 -22 57 55 7 58 28 35 57 10 35 59 14 29 95 0 0 57 51 6 12 13 10 28 159 -23 57 34 23 58 7 56 56 49 46 58 53 55 96 0 0 57 30 4 12 13 17 28 160 -23 57 13 19 57 46 56 56 28 37 58 33 0 97 0 0 57 8 43 12 13 24 29 161 -24 56 51 56 57 25 36 56 7 9 58 11 46 98 0 0 56 47 2 12 13 31 29 162 -24 56 30 13 57 3 57 55 45 22 57 50 11 99 0 0 56 25 2 12 13 38 30 163 -25 56 8 12 56 41 58 55 23 16 57 28 17 100 0 0 56 2 42 12 13 46 31 164 -26 55 45 51 56 19 40 55 0 52 57 6 3 101 0 0 55 40 5 12 13 53 31 165 -26 55 23 12 55 57 4 54 38 10 56 43 31 102 0 0 55 17 9 12 14 1 32 166 -27 55 0 15 55 34 9 54 15 9 56 20 39 103 0 0 54 53 55 12 14 9 32 168 -27 54 37 0 55 10 57 53 51 52 55 57 30 104 0 0 54 30 24 12 14 18 33 169 -28 54 13 28 54 47 27 53 28 17 55 34 2 105 0 0 54 6 36 12 14 26 33 170 -29 53 49 40 54 23 40 53 4 27 55 10 17 106 0 0 53 42 32 12 14 35 34 171 -29 53 25 35 53 59 36 52 40 20 54 46 16 107 0 0 53 18 12 12 14 44 34 172 -30 53 1 14 53 35 17 52 15 58 54 21 58 108 0 0 52 53 37 12 14 53 35 174 -31 52 36 39 53 10 42 51 51 21 53 57 24 109 0 0 52 28 47 12 15 3 35 175 -31 52 11 49 52 45 53 51 26 31 53 32 36 110 0 0 52 3 44 12 15 13 35 176 -32 51 46 45 52 20 49 51 1 26 53 7 32 111 0 0 51 38 27 12 15 22 36 177 -33 51 21 28 51 55 32 50 36 10 52 42 15 112 0 0 51 12 57 12 15 32 36 179 -33 50 55 59 51 30 2 50 10 41 52 16 45 113 0 0 50 47 16 12 15 43 37 180 -34 50 30 18 51 4 21 49 45 0 51 51 3 114 0 0 50 21 24 12 15 53 37 181 -35 50 4 26 50 38 28 49 19 10 51 25 9 115 0 0 49 55 21 12 16 4 38 183 -36 49 38 24 50 12 25 48 53 9 50 59 4 116 0 0 49 29 9 12 16 14 38 184 -36 49 12 13 49 46 12 48 27 0 50 32 49 117 0 0 49 2 49 12 16 26 38 185 -37 48 45 53 49 19 51 48 0 43 50 6 25 118 0 0 48 36 21 12 16 37 39 187 -38 48 19 26 48 53 22 47 34 18 49 39 54 119 0 0 48 9 46 12 16 48 39 188 -39 47 52 53 48 26 46 47 7 48 49 13 14 120 0 0 47 43 6 12 17 0 39 189 -40 47 26 13 48 0 5 46 41 12 48 46 29 121 0 0 47 16 20 12 17 11 40 191 -40 46 59 30 47 33 18 46 14 31 48 19 38 122 0 0 46 49 31 12 17 23 40 192 -41 46 32 42 47 6 27 45 47 48 47 52 43 123 0 0 46 22 39 12 17 35 40 194 -42 46 5 52 46 39 34 45 21 2 47 25 45 124 0 0 45 55 46 12 17 47 41 195 -43 45 38 59 46 12 38 44 54 14 46 58 45 125 0 0 45 28 51 12 18 0 41 197 -44 45 12 7 45 45 41 44 27 26 46 31 43 126 0 0 45 1 56 12 18 12 41 198 -45 44 45 14 45 18 45 44 0 39 46 4 41 127 0 0 44 35 3 12 18 25 41 200 -45 44 18 23 44 51 49 43 33 53 45 37 39 128 0 0 44 8 12 12 18 37 41 201 -46 43 51 34 44 24 56 43 7 10 45 10 40 129 0 0 43 41 24 12 18 50 42 203 -47 43 24 49 43 58 6 42 40 30 44 43 43 130 0 0 43 14 41 12 19 3 42 204 -48 42 58 8 43 31 20 42 13 55 44 16 51 131 0 0 42 48 3 12 19 16 42 206 -49 42 31 32 43 4 40 41 47 26 43 50 3 132 0 0 42 21 32 12 19 29 42 207 -50 42 5 3 42 38 6 41 21 4 43 23 22 133 0 0 41 55 7 12 19 42 42 209 -51 41 38 42 42 11 39 40 54 49 42 56 48 134 0 0 41 28 52 12 19 55 42 210 -52 41 12 29 41 45 21 40 28 43 42 30 22 135 0 0 41 2 46 12 20 8 42 212 -52 40 46 26 41 19 12 40 2 47 42 4 5 136 0 0 40 36 50 12 20 22 42 213 -53 40 20 33 40 53 14 39 37 2 41 37 59 137 0 0 40 11 6 12 20 35 42 215 -54 39 54 52 40 27 27 39 11 28 41 12 4 138 0 0 39 45 35 12 20 48 41 216 -55 39 29 23 40 1 52 38 46 7 40 46 21 139 0 0 39 20 17 12 21 1 41 218 -56 39 4 8 39 36 31 38 21 0 40 20 51 140 0 0 38 55 13 12 21 15 41 219 -57 38 39 7 39 11 24 37 56 7 39 55 36 141 0 0 38 30 24 12 21 28 41 221 -58 38 14 22 38 46 33 37 31 29 39 30 36 142 0 0 38 5 52 12 21 41 41 222 -59 37 49 53 38 21 57 37 7 8 39 5 52 143 0 0 37 41 37 12 21 54 40 223 -60 37 25 40 37 57 39 36 43 4 38 41 25 144 0 0 37 17 40 12 22 7 40 225 -61 37 1 46 37 33 39 36 19 18 38 17 16 145 0 0 36 54 1 12 22 20 40 226 -62 36 38 11 37 9 57 35 55 51 37 53 26 146 0 0 36 30 43 12 22 33 39 227 -63 36 14 55 36 46 35 35 32 44 37 29 55 147 0 0 36 7 44 12 22 46 39 229 -63 35 52 0 36 23 34 35 9 57 37 6 44 148 0 0 35 45 7 12 22 59 39 230 -64 35 29 26 36 0 53 34 47 31 36 43 55 149 0 0 35 22 52 12 23 12 38 231 -65 35 7 14 35 38 35 34 25 27 36 21 28 150 0 0 35 0 59 12 23 24 38 233 -66 34 45 24 35 16 39 34 3 45 35 59 23 151 0 0 34 39 29 12 23 37 37 234 -67 34 23 57 34 55 6 33 42 26 35 37 41 152 0 0 34 18 23 12 23 49 37 235 -68 34 2 55 34 33 57 33 21 32 35 16 24 153 0 0 33 57 42 12 24 1 36 236 -69 33 42 16 34 13 12 33 1 1 34 55 31 154 0 0 33 37 26 12 24 13 36 237 -70 33 22 3 33 52 53 32 40 56 34 35 3 155 0 0 33 17 35 12 24 25 35 238 -71 33 2 16 33 33 0 32 21 16 34 15 1 156 0 0 32 58 11 12 24 37 35 240 -72 32 42 54 33 13 32 32 2 3 33 55 25 157 0 0 32 39 13 12 24 49 34 241 -72 32 23 59 32 54 32 31 43 16 33 36 17 158 0 0 32 20 42 12 25 0 33 242 -73 32 5 32 32 35 58 31 24 55 33 17 35 159 0 0 32 2 40 12 25 11 33 243 -74 31 47 32 32 17 52 31 7 3 32 59 21 160 0 0 31 45 5 12 25 22 32 244 -75 31 29 59 32 0 15 30 49 38 32 41 36 161 0 0 31 27 58 12 25 33 31 244 -76 31 12 56 31 43 5 30 32 41 32 24 19 162 0 0 31 11 21 12 25 43 31 245 -76 30 56 21 31 26 25 30 16 13 32 7 31 163 0 0 30 55 12 12 25 54 30 246 -77 30 40 15 31 10 14 30 0 14 31 51 13 164 0 0 30 39 33 12 26 4 29 247 -78 30 24 39 30 54 33 29 44 45 31 35 24 165 0 0 30 24 24 12 26 14 29 248 -78 30 9 32 30 39 21 29 29 45 31 20 5 166 0 0 30 9 45 12 26 23 28 249 -79 29 54 55 30 24 39 29 15 15 31 5 17 167 0 0 29 55 36 12 26 33 27 250 -79 29 40 49 30 10 28 29 1 14 30 50 59 168 0 0 29 41 58 12 26 42 26 250 -80 29 27 13 29 56 48 28 47 45 30 37 12 169 0 0 29 28 51 12 26 51 25 251 -80 29 14 8 29 43 38 28 34 45 30 23 56 170 0 0 29 16 15 12 26 59 25 252 -80 29 1 34 29 31 0 28 22 17 30 11 11 171 0 0 29 4 9 12 27 8 24 253 -80 28 49 31 29 18 52 28 10 19 29 58 58 172 0 0 28 52 35 12 27 16 23 253 -80 28 37 59 29 7 16 27 58 53 29 47 17 173 0 0 28 41 33 12 27 23 22 254 -80 28 26 58 28 56 12 27 47 58 29 36 7 174 0 0 28 31 2 12 27 31 21 255 -80 28 16 30 28 45 39 27 37 34 29 25 29 175 0 0 28 21 3 12 27 38 21 255 -80 28 6 32 28 35 38 27 27 41 29 15 23 176 0 0 28 11 36 12 27 45 20 256 -79 27 57 7 28 26 9 27 18 20 29 5 49 177 0 0 28 2 40 12 27 52 19 257 -79 27 48 13 28 17 12 27 9 31 28 56 47 178 0 0 27 54 17 12 27 58 18 257 -78 27 39 51 28 8 47 27 1 13 28 48 17 179 0 0 27 46 25 12 28 4 17 258 -78 27 32 1 28 0 54 26 53 27 28 40 20 180 0 0 27 39 5 12 28 10 16 258 -77 27 24 42 27 53 33 26 46 12 28 32 55 -179 0 0 27 32 18 12 28 15 15 259 -77 27 17 56 27 46 43 26 39 29 28 26 2 -178 0 0 27 26 2 12 28 21 15 259 -76 27 11 42 27 40 27 26 33 18 28 19 41 -177 0 0 27 20 18 12 28 26 14 260 -75 27 5 59 27 34 42 26 27 39 28 13 53 -176 0 0 27 15 7 12 28 30 13 260 -74 27 0 49 27 29 29 26 22 31 28 8 37 -175 0 0 27 10 27 12 28 34 12 261 -74 26 56 10 27 24 48 26 17 55 28 3 54 -174 0 0 27 6 19 12 28 38 11 261 -73 26 52 3 27 20 39 26 13 51 27 59 42 -173 0 0 27 2 43 12 28 42 10 262 -72 26 48 28 27 17 3 26 10 18 27 56 3 -172 0 0 26 59 39 12 28 45 9 262 -71 26 45 25 27 13 58 26 7 17 27 52 56 -171 0 0 26 57 7 12 28 48 8 263 -70 26 42 53 27 11 25 26 4 47 27 50 21 -170 0 0 26 55 6 12 28 51 8 263 -69 26 40 53 27 9 23 26 2 49 27 48 18 -169 0 0 26 53 37 12 28 54 7 264 -69 26 39 25 27 7 54 26 1 22 27 46 46 -168 0 0 26 52 39 12 28 56 6 264 -68 26 38 27 27 6 55 26 0 26 27 45 47 -167 0 0 26 52 13 12 28 58 5 265 -67 26 38 1 27 6 29 .. .. .. 27 45 19 -166 0 0 26 52 18 12 28 59 4 265 -66 26 38 7 27 6 33 .. .. .. 27 45 23 -165 0 0 26 52 54 12 29 0 3 266 -65 26 38 43 27 7 9 .. .. .. 27 45 58 -164 0 0 26 54 1 12 29 1 2 266 -64 26 39 50 27 8 16 .. .. .. 27 47 4 -163 0 0 26 55 39 12 29 2 1 267 -63 26 41 28 27 9 54 .. .. .. 27 48 42 -162 0 0 26 57 48 12 29 2 0 267 -62 26 43 37 27 12 2 .. .. .. 27 50 51 Uncertainty in time = +/- 6 secs Prediction of 2012 Nov 16.0 Data for the target star ------------------------ * name: 2UCAC 30937342 * constellation : Pisces * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 23 42 54.8002 DE: -02 33 36.663 * position source: mpos:UCAC4 pm:UCAC4 * standard error: RA,DE ["]: ( .029, .039 ) * V mag [mag]: 12.0 * B mag [mag]: 0.0 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (923) Herluga approx. diameter [km]: 35 approx. diameter ["]: .033 distance from Earth [AU]: 1.47300 * orbital information: orbit source: Preston date of fit: 2012 Nov 16 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 920 number of rejected observations: 21 time covered by the observations: 1919 Dec 10 - 2012 Oct 30 1 sigma uncertainty ellipse (major, minor, PA): 0.028, 0.023, 87° remarks: * orbital elements for (923) Herluga : Mean anomaly = 347.04545907 deg Arg. of pericenter = 201.49691834 deg Long. of node = 197.68304581 deg Inclination = 14.47777478 deg Eccentricity = 0.19652413 Semimajor axis = 2.61424080 AU Perihelion dist = 2.10047940 AU Mag: H = 11.45, G = 0.15 Epoch of elements : MJD 56250.89000000 TDT (2012 Nov 19.890) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 19 923 Herluga 12h 19.8m UT 12.0 23 42 54.800- 2 33 36.662UCAC 30937342 0.0 15.1 35 4.6 1.473 1.601 -9.30 111.8558 -2.556 -8.56 -19.62 12.3292 0.27009 0.69279 4.01642 -1.56062 0.00452 0.00198 2000 346.83793120121119.00000201.496918197.683046 14.4777750.19652413 2.6142408 2.100479411.5 5.00.15 RATE 2.3317700 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.045 0.040 359 2.35 0.044 0 0 2-3 056247.0020121119_937342 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Nov 16, 08:19 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org