IOTA/IOTA-ES occultation update for (636) Erika / UCAC4 581-044034 event on 2020 Dec 26, 23:27 UT Visible from Russia Summary ------- On 2020 Dec 26 UT, the 75.3 km diameter asteroid (636) Erika will occult a 12.4 mag star in the constellation Leo for observers along a path across Russia. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.59 mag to 14.92 mag (the magnitude of the asteroid) for at most 8.3 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Hugh Harris, astrometry for the asteroid kindly provided by Bill Owen, astrometry for the asteroid kindly provided by the IAU Minor Planet Center. This work has made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. The event at a glimpse ---------------------- * Rank: 99 * date and approx. time of event: 2020 Dec 26, 23:17 - 2020 Dec 26, 23:37 * geocentric midpoint of event [JD]: 2459210.47738750 * magnitude of target star: 12.44 * magnitude drop [mag]: 2.59 * estimated maximum duration [s]: 8.3 * Moon: 90 % sunlit, 77° distance * Sun: 139° distance * rough path description: Russia Additional comments ------------------- RUWE high The occultation path -------------------- * approximate projected width [km]: 88 * 1 sigma uncertainty interval [path widths]: +/- 0.32 * 1 sigma uncertainty interval [seconds]: +/- 4.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.020, +/- 0.013) * 1 sigma uncertainty ellipse (major, minor, PA): (0.021", 0.012", 110°) * approx speed of asteroid's shadow [km/s]: 9.1024 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 581-044034 by 636 Erika on 2020 Dec 26 Centre Star Star Sun Path Limits Error Limits Alt E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 Crn o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Longitude Longitude Longitude Longitude 143 18 33 - 6 0 0 23 17 23.6 0 296 41 ... .. .. 142 26 24 ... .. .. 141 53 45 .... 141 21 41 - 5 0 0 23 17 24.4 3 296 39 142 12 21 140 32 2 142 45 13 140 0 53 -0.38 139 31 33 - 4 0 0 23 17 26.3 5 297 37 140 19 58 138 43 59 140 51 20 138 14 6 -0.47 137 47 8 - 3 0 0 23 17 29.0 7 297 35 138 33 41 137 1 21 139 3 46 136 32 33 -0.51 136 7 40 - 2 0 0 23 17 32.6 9 297 33 136 52 36 135 23 25 137 21 36 134 55 31 -0.52 134 32 31 - 1 0 0 23 17 37.0 10 297 31 135 16 3 133 49 34 135 44 7 133 22 29 -0.53 133 1 9 0 0 0 23 17 42.0 12 297 29 133 43 28 132 19 21 134 10 44 131 52 58 -0.54 131 33 9 1 0 0 23 17 47.6 14 297 28 132 14 25 130 52 22 132 40 59 130 26 36 -0.54 Latitude Latitude Latitude Latitude 130 0 0 2 5 52 23 17 54.4 16 296 26 2 34 47 1 37 8 2 53 18 1 18 53 -0.54 129 0 0 2 49 34 23 17 59.3 17 296 24 3 18 43 2 20 36 3 37 23 2 2 13 -0.55 128 0 0 3 34 16 23 18 4.6 18 296 23 4 3 39 3 5 4 4 22 29 2 46 32 -0.55 127 0 0 4 19 57 23 18 10.2 19 296 22 4 49 35 3 50 31 5 8 34 3 31 50 -0.55 126 0 0 5 6 37 23 18 16.3 21 296 21 5 36 29 4 36 56 5 55 38 4 18 6 -0.55 125 0 0 5 54 15 23 18 22.7 22 296 20 6 24 22 5 24 19 6 43 41 5 5 20 -0.56 124 0 0 6 42 51 23 18 29.5 23 295 18 7 13 13 6 12 40 7 32 41 5 53 31 -0.56 123 0 0 7 32 23 23 18 36.8 24 295 17 8 3 1 7 1 56 8 22 39 6 42 38 -0.56 122 0 0 8 22 50 23 18 44.4 25 295 16 8 53 45 7 52 9 9 13 33 7 32 41 -0.56 121 0 0 9 14 13 23 18 52.4 27 295 15 9 45 23 8 43 16 10 5 22 8 23 38 -0.56 120 0 0 10 6 30 23 19 0.8 28 294 13 10 37 56 9 35 16 10 58 6 9 15 28 -0.56 119 0 0 10 59 38 23 19 9.6 29 294 12 11 31 21 10 28 9 11 51 42 10 8 11 -0.56 118 0 0 11 53 39 23 19 18.8 30 293 11 12 25 38 11 21 53 12 46 10 11 1 45 -0.56 117 0 0 12 48 29 23 19 28.4 32 293 10 13 20 45 12 16 26 13 41 27 11 56 8 -0.56 116 0 0 13 44 7 23 19 38.3 33 292 8 14 16 40 13 11 48 14 37 34 12 51 19 -0.56 115 0 0 14 40 31 23 19 48.7 34 292 7 15 13 22 14 7 55 15 34 27 13 47 16 -0.56 114 0 0 15 37 41 23 19 59.4 35 291 6 16 10 49 15 4 48 16 32 5 14 43 58 -0.56 113 0 0 16 35 33 23 20 10.4 36 290 5 17 8 58 16 2 23 17 30 26 15 41 22 -0.56 112 0 0 17 34 5 23 20 21.8 38 290 3 18 7 49 17 0 38 18 29 27 16 39 27 -0.56 111 0 0 18 33 16 23 20 33.6 39 289 2 19 7 17 17 59 32 19 29 8 17 38 11 -0.56 110 0 0 19 33 4 23 20 45.7 40 288 1 20 7 22 18 59 2 20 29 24 18 37 30 -0.57 109 0 0 20 33 24 23 20 58.1 41 287 0 21 8 0 19 59 6 21 30 14 19 37 23 -0.57 108 0 0 21 34 16 23 21 10.8 42 286 -1 22 9 10 20 59 40 22 31 34 20 37 46 -0.57 107 0 0 22 35 35 23 21 23.8 43 285 -3 23 10 47 22 0 43 23 33 23 21 38 38 -0.57 106 0 0 23 37 20 23 21 37.1 44 284 -4 24 12 49 23 2 11 24 35 37 22 39 56 -0.57 105 0 0 24 39 28 23 21 50.6 45 283 -5 25 15 14 24 4 1 25 38 13 23 41 36 -0.57 104 0 0 25 41 54 23 22 4.4 47 282 -6 26 17 57 25 6 11 26 41 8 24 43 35 -0.57 103 0 0 26 44 36 23 22 18.4 48 280 -7 27 20 57 26 8 37 27 44 18 25 45 51 -0.57 102 0 0 27 47 31 23 22 32.6 49 279 -9 28 24 8 27 11 16 28 47 40 26 48 20 -0.57 101 0 0 28 50 35 23 22 46.9 50 277 -10 29 27 28 28 14 4 29 51 11 27 50 58 -0.58 100 0 0 29 53 45 23 23 1.5 50 276 -11 30 30 54 29 16 58 30 54 47 28 53 43 -0.58 99 0 0 30 56 56 23 23 16.2 51 274 -12 31 34 21 30 19 55 31 58 24 29 56 30 -0.58 98 0 0 32 0 6 23 23 30.9 52 272 -13 32 37 46 31 22 50 33 1 59 30 59 16 -0.58 97 0 0 33 3 10 23 23 45.8 53 270 -14 33 41 5 32 25 40 34 5 28 32 1 58 -0.58 96 0 0 34 6 6 23 24 0.8 54 269 -15 34 44 14 33 28 22 35 8 46 33 4 32 -0.58 95 0 0 35 8 48 23 24 15.8 55 267 -16 35 47 10 34 30 52 36 11 51 34 6 53 -0.58 94 0 0 36 11 14 23 24 30.8 55 264 -17 36 49 48 35 33 5 37 14 37 35 8 59 -0.59 93 0 0 37 13 19 23 24 45.8 56 262 -18 37 52 5 36 34 59 38 17 2 36 10 46 -0.59 92 0 0 38 15 0 23 25 0.8 56 260 -19 38 53 57 37 36 29 39 19 2 37 12 10 -0.59 91 0 0 39 16 13 23 25 15.7 57 258 -20 39 55 20 38 37 33 40 20 31 38 13 7 -0.59 90 0 0 40 16 54 23 25 30.6 57 255 -21 40 56 11 39 38 5 41 21 28 39 13 35 -0.59 89 0 0 41 17 1 23 25 45.3 58 253 -22 41 56 26 40 38 4 42 21 48 40 13 28 -0.59 88 0 0 42 16 29 23 26 0.0 58 250 -23 42 56 1 41 37 25 43 21 28 41 12 45 -0.59 87 0 0 43 15 14 23 26 14.5 58 248 -24 43 54 53 42 36 5 44 20 24 42 11 21 -0.59 86 0 0 44 13 15 23 26 28.9 59 245 -25 44 52 58 43 34 1 45 18 34 43 9 14 -0.60 85 0 0 45 10 28 23 26 43.1 59 243 -26 45 50 15 44 31 10 46 15 53 44 6 21 -0.60 84 0 0 46 6 50 23 26 57.0 59 240 -26 46 46 39 45 27 29 47 12 19 45 2 39 -0.60 83 0 0 47 2 18 23 27 10.8 59 238 -27 47 42 9 46 22 56 48 7 49 45 58 5 -0.60 82 0 0 47 56 49 23 27 24.4 59 235 -28 48 36 41 47 17 27 49 2 22 46 52 36 -0.60 81 0 0 48 50 23 23 27 37.7 59 233 -28 49 30 13 48 11 2 49 55 53 47 46 11 -0.60 80 0 0 49 42 55 23 27 50.8 59 230 -29 50 22 44 49 3 36 50 48 22 48 38 47 -0.60 79 0 0 50 34 26 23 28 3.7 59 228 -30 51 14 11 49 55 10 51 39 47 49 30 23 -0.60 78 0 0 51 24 52 23 28 16.2 59 225 -30 52 4 32 50 45 41 52 30 6 50 20 56 -0.60 77 0 0 52 14 13 23 28 28.5 58 223 -31 52 53 47 51 35 7 53 19 17 51 10 26 -0.60 76 0 0 53 2 27 23 28 40.6 58 220 -32 53 41 54 52 23 28 54 7 19 51 58 51 -0.61 75 0 0 53 49 33 23 28 52.3 58 218 -32 54 28 53 53 10 42 54 54 12 52 46 10 -0.61 74 0 0 54 35 31 23 29 3.7 58 216 -33 55 14 42 53 56 49 55 39 55 53 32 23 -0.61 73 0 0 55 20 21 23 29 14.9 57 214 -33 55 59 21 54 41 48 56 24 27 54 17 28 -0.61 72 0 0 56 4 1 23 29 25.8 57 212 -33 56 42 49 55 25 39 57 7 49 55 1 26 -0.61 71 0 0 56 46 32 23 29 36.3 57 210 -34 57 25 8 56 8 22 57 50 0 55 44 16 -0.61 70 0 0 57 27 53 23 29 46.6 56 208 -34 58 6 17 56 49 56 58 31 0 56 25 58 -0.61 69 0 0 58 8 6 23 29 56.6 56 206 -35 58 46 16 57 30 23 59 10 49 57 6 33 -0.61 68 0 0 58 47 11 23 30 6.4 56 204 -35 59 25 6 58 9 41 59 49 30 57 46 0 -0.61 67 0 0 59 25 7 23 30 15.8 55 202 -35 60 2 47 58 47 53 60 27 1 58 24 20 -0.61 66 0 0 60 1 57 23 30 24.9 55 200 -36 60 39 20 59 24 57 61 3 24 59 1 35 -0.61 65 0 0 60 37 40 23 30 33.8 54 198 -36 61 14 47 60 0 57 61 38 39 59 37 44 -0.61 64 0 0 61 12 18 23 30 42.4 54 197 -36 61 49 7 60 35 51 62 12 49 60 12 49 -0.61 63 0 0 61 45 51 23 30 50.8 54 195 -36 62 22 24 61 9 42 62 45 53 60 46 50 -0.61 62 0 0 62 18 22 23 30 58.9 53 193 -37 62 54 36 61 42 29 63 17 54 61 19 48 -0.61 61 0 0 62 49 50 23 31 6.8 53 192 -37 63 25 47 62 14 16 63 48 53 61 51 46 -0.61 60 0 0 63 20 19 23 31 14.4 52 190 -37 63 55 56 62 45 2 64 18 51 62 22 43 -0.61 59 0 0 63 49 48 23 31 21.7 52 189 -37 64 25 7 63 14 49 64 47 49 62 52 41 -0.61 58 0 0 64 18 19 23 31 28.9 52 187 -37 64 53 19 63 43 38 65 15 49 63 21 42 -0.61 57 0 0 64 45 54 23 31 35.8 51 186 -38 65 20 35 64 11 32 65 42 52 63 49 47 -0.61 56 0 0 65 12 33 23 31 42.5 51 184 -38 65 46 56 64 38 30 66 9 0 64 16 57 -0.61 55 0 0 65 38 20 23 31 49.1 50 183 -38 66 12 23 65 4 35 66 34 15 64 43 13 -0.61 54 0 0 66 3 14 23 31 55.4 50 181 -38 66 36 58 65 29 47 66 58 38 65 8 37 -0.61 53 0 0 66 27 18 23 32 1.5 49 180 -38 67 0 43 65 54 10 67 22 11 65 33 11 -0.61 52 0 0 66 50 32 23 32 7.4 49 179 -38 67 23 39 66 17 42 67 44 54 65 56 55 -0.61 51 0 0 67 12 59 23 32 13.2 49 177 -38 67 45 47 66 40 28 68 6 50 66 19 52 -0.61 50 0 0 67 34 40 23 32 18.8 48 176 -38 68 7 9 67 2 26 68 28 0 66 42 1 -0.61 49 0 0 67 55 35 23 32 24.2 48 175 -39 68 27 46 67 23 40 68 48 25 67 3 26 -0.61 48 0 0 68 15 48 23 32 29.4 48 173 -39 68 47 40 67 44 10 69 8 8 67 24 7 -0.61 47 0 0 68 35 18 23 32 34.5 47 172 -39 69 6 53 68 3 57 69 27 8 67 44 5 -0.61 46 0 0 68 54 7 23 32 39.5 47 171 -39 69 25 24 68 23 3 69 45 28 68 3 23 -0.61 45 0 0 69 12 16 23 32 44.3 46 170 -39 69 43 16 68 41 30 70 3 9 68 22 0 -0.61 44 0 0 69 29 48 23 32 49.0 46 168 -39 70 0 31 68 59 18 70 20 13 68 39 58 -0.61 43 0 0 69 46 42 23 32 53.6 46 167 -39 70 17 8 69 16 29 70 36 39 68 57 19 -0.61 42 0 0 70 3 0 23 32 58.0 45 166 -39 70 33 10 69 33 3 70 52 30 69 14 3 -0.61 41 0 0 70 18 44 23 33 2.3 45 165 -39 70 48 37 69 49 2 71 7 47 69 30 13 -0.61 40 0 0 70 33 54 23 33 6.5 45 164 -39 71 3 31 70 4 27 71 22 31 69 45 48 -0.61 39 0 0 70 48 31 23 33 10.6 44 163 -39 71 17 53 70 19 20 71 36 43 70 0 49 -0.61 38 0 0 71 2 36 23 33 14.5 44 161 -39 71 31 44 70 33 40 71 50 24 70 15 19 -0.61 37 0 0 71 16 12 23 33 18.4 44 160 -39 71 45 4 70 47 30 72 3 34 70 29 18 -0.61 36 0 0 71 29 17 23 33 22.2 44 159 -39 71 57 55 71 0 49 72 16 16 70 42 46 -0.61 35 0 0 71 41 54 23 33 25.9 43 158 -39 72 10 18 71 13 40 72 28 30 70 55 45 -0.61 34 0 0 71 54 3 23 33 29.5 43 157 -39 72 22 13 71 26 2 72 40 16 71 8 16 -0.61 33 0 0 72 5 45 23 33 33.0 43 156 -39 72 33 42 71 37 57 72 51 36 71 20 19 -0.61 32 0 0 72 17 0 23 33 36.4 42 155 -39 72 44 45 71 49 26 73 2 31 71 31 56 -0.61 31 0 0 72 27 51 23 33 39.8 42 153 -39 72 55 22 72 0 28 73 13 0 71 43 6 -0.61 30 0 0 72 38 17 23 33 43.1 42 152 -39 73 5 36 72 11 6 73 23 6 71 53 51 -0.61 29 0 0 72 48 19 23 33 46.3 41 151 -39 73 15 26 72 21 20 73 32 49 72 4 12 -0.61 28 0 0 72 57 57 23 33 49.4 41 150 -39 73 24 53 72 31 10 73 42 8 72 14 10 -0.61 27 0 0 73 7 14 23 33 52.5 41 149 -39 73 33 59 72 40 37 73 51 6 72 23 44 -0.61 26 0 0 73 16 8 23 33 55.5 41 148 -39 73 42 42 72 49 42 73 59 43 72 32 55 -0.61 25 0 0 73 24 41 23 33 58.4 40 147 -39 73 51 5 72 58 25 74 7 59 72 41 45 -0.61 24 0 0 73 32 53 23 34 1.3 40 146 -39 73 59 7 73 6 48 74 15 54 72 50 13 -0.61 23 0 0 73 40 45 23 34 4.1 40 145 -39 74 6 49 73 14 49 74 23 30 72 58 21 -0.60 22 0 0 73 48 18 23 34 6.9 40 144 -39 74 14 12 73 22 31 74 30 47 73 6 9 -0.60 21 0 0 73 55 31 23 34 9.6 39 143 -39 74 21 17 73 29 53 74 37 46 73 13 37 -0.60 20 0 0 74 2 26 23 34 12.3 39 141 -39 74 28 3 73 36 56 74 44 26 73 20 45 -0.60 19 0 0 74 9 2 23 34 14.9 39 140 -39 74 34 31 73 43 41 74 50 49 73 27 35 -0.60 18 0 0 74 15 21 23 34 17.5 38 139 -39 74 40 41 73 50 8 74 56 54 73 34 7 -0.60 17 0 0 74 21 22 23 34 20.1 38 138 -39 74 46 35 73 56 17 75 2 43 73 40 20 -0.60 16 0 0 74 27 7 23 34 22.6 38 137 -39 74 52 12 74 2 8 75 8 15 73 46 17 -0.60 15 0 0 74 32 34 23 34 25.0 38 136 -39 74 57 32 74 7 43 75 13 31 73 51 56 -0.60 14 0 0 74 37 46 23 34 27.4 37 135 -38 75 2 37 74 13 1 75 18 31 73 57 18 -0.60 13 0 0 74 42 41 23 34 29.8 37 134 -38 75 7 26 74 18 3 75 23 16 74 2 24 -0.60 12 0 0 74 47 21 23 34 32.2 37 133 -38 75 12 0 74 22 49 75 27 46 74 7 13 -0.60 11 0 0 74 51 45 23 34 34.5 37 132 -38 75 16 18 74 27 19 75 32 1 74 11 47 -0.60 10 0 0 74 55 55 23 34 36.8 37 131 -38 75 20 22 74 31 34 75 36 1 74 16 6 -0.60 9 0 0 74 59 50 23 34 39.0 36 130 -38 75 24 12 74 35 34 75 39 47 74 20 9 -0.60 8 0 0 75 3 30 23 34 41.3 36 129 -38 75 27 47 74 39 18 75 43 20 74 23 56 -0.60 7 0 0 75 6 55 23 34 43.5 36 128 -38 75 31 8 74 42 49 75 46 38 74 27 30 -0.60 6 0 0 75 10 7 23 34 45.6 36 127 -38 75 34 16 74 46 5 75 49 42 74 30 48 -0.60 5 0 0 75 13 5 23 34 47.8 35 126 -38 75 37 9 74 49 6 75 52 33 74 33 52 -0.60 4 0 0 75 15 49 23 34 49.9 35 125 -38 75 39 49 74 51 54 75 55 11 74 36 42 -0.60 3 0 0 75 18 19 23 34 52.0 35 124 -38 75 42 16 74 54 28 75 57 36 74 39 18 -0.60 2 0 0 75 20 36 23 34 54.1 35 123 -38 75 44 30 74 56 48 75 59 48 74 41 40 -0.60 1 0 0 75 22 40 23 34 56.1 34 122 -38 75 46 31 74 58 54 76 1 47 74 43 48 -0.60 0 0 0 75 24 30 23 34 58.2 34 121 -38 75 48 19 75 0 47 76 3 33 74 45 43 -0.60 - 1 0 0 75 26 7 23 35 0.2 34 120 -38 75 49 54 75 2 27 76 5 7 74 47 24 -0.60 - 2 0 0 75 27 32 23 35 2.2 34 119 -38 75 51 17 75 3 53 76 6 28 74 48 51 -0.60 - 3 0 0 75 28 43 23 35 4.1 33 117 -38 75 52 26 75 5 6 76 7 37 74 50 6 -0.60 - 4 0 0 75 29 42 23 35 6.1 33 116 -37 75 53 24 75 6 6 76 8 33 74 51 7 -0.60 - 5 0 0 75 30 28 23 35 8.1 33 115 -37 75 54 9 75 6 53 76 9 17 74 51 54 -0.60 - 6 0 0 75 31 1 23 35 10.0 33 114 -37 75 54 41 75 7 27 76 9 49 74 52 29 -0.60 - 7 0 0 75 31 22 23 35 11.9 33 113 -37 75 55 1 75 7 49 76 10 9 74 52 51 -0.60 - 8 0 0 75 31 30 23 35 13.8 32 112 -37 75 55 9 75 7 57 76 10 16 74 52 59 -0.60 - 9 0 0 75 31 25 23 35 15.7 32 111 -37 75 55 4 75 7 52 76 10 12 74 52 54 -0.60 - 10 0 0 75 31 8 23 35 17.6 32 110 -37 75 54 47 75 7 34 76 9 55 74 52 36 -0.60 - 11 0 0 75 30 38 23 35 19.5 32 109 -37 75 54 17 75 7 4 76 9 26 74 52 5 -0.60 - 12 0 0 75 29 55 23 35 21.3 31 108 -37 75 53 35 75 6 20 76 8 44 74 51 21 -0.60 - 13 0 0 75 28 59 23 35 23.2 31 107 -37 75 52 41 75 5 23 76 7 50 74 50 24 -0.60 - 14 0 0 75 27 51 23 35 25.0 31 106 -37 75 51 34 75 4 14 76 6 44 74 49 13 -0.60 - 15 0 0 75 26 30 23 35 26.9 31 105 -37 75 50 14 75 2 51 76 5 26 74 47 49 -0.60 - 16 0 0 75 24 55 23 35 28.7 30 104 -37 75 48 42 75 1 15 76 3 55 74 46 12 -0.60 - 17 0 0 75 23 8 23 35 30.5 30 103 -37 75 46 57 74 59 25 76 2 11 74 44 21 -0.60 - 18 0 0 75 21 8 23 35 32.4 30 102 -36 75 44 59 74 57 22 76 0 15 74 42 16 -0.60 - 19 0 0 75 18 54 23 35 34.2 30 101 -36 75 42 48 74 55 6 75 58 6 74 39 58 -0.60 - 20 0 0 75 16 27 23 35 36.0 30 100 -36 75 40 24 74 52 35 75 55 44 74 37 26 -0.60 - 21 0 0 75 13 46 23 35 37.8 29 99 -36 75 37 47 74 49 51 75 53 9 74 34 39 -0.60 - 22 0 0 75 10 51 23 35 39.6 29 98 -36 75 34 56 74 46 53 75 50 20 74 31 39 -0.60 - 23 0 0 75 7 43 23 35 41.4 29 97 -36 75 31 52 74 43 40 75 47 18 74 28 24 -0.60 - 24 0 0 75 4 20 23 35 43.2 29 96 -36 75 28 33 74 40 13 75 44 3 74 24 54 -0.60 - 25 0 0 75 0 43 23 35 45.0 28 95 -36 75 25 1 74 36 32 75 40 34 74 21 10 -0.60 - 26 0 0 74 56 51 23 35 46.8 28 94 -36 75 21 14 74 32 35 75 36 50 74 17 10 -0.60 - 27 0 0 74 52 45 23 35 48.6 28 93 -36 75 17 13 74 28 24 75 32 52 74 12 55 -0.60 - 28 0 0 74 48 23 23 35 50.4 28 92 -35 75 12 57 74 23 57 75 28 40 74 8 25 -0.60 - 29 0 0 74 43 47 23 35 52.2 27 91 -35 75 8 26 74 19 14 75 24 12 74 3 39 -0.60 - 30 0 0 74 38 54 23 35 54.0 27 90 -35 75 3 39 74 14 15 75 19 30 73 58 36 -0.60 - 31 0 0 74 33 45 23 35 55.8 27 89 -35 74 58 37 74 9 0 75 14 32 73 53 17 -0.60 - 32 0 0 74 28 20 23 35 57.6 26 88 -35 74 53 19 74 3 29 75 9 18 73 47 41 -0.60 - 33 0 0 74 22 39 23 35 59.4 26 87 -35 74 47 45 73 57 40 75 3 49 73 41 48 -0.60 - 34 0 0 74 16 40 23 36 1.2 26 86 -35 74 41 54 73 51 34 74 58 2 73 35 37 -0.60 - 35 0 0 74 10 24 23 36 3.0 26 85 -35 74 35 45 73 45 10 74 51 59 73 29 9 -0.60 - 36 0 0 74 3 50 23 36 4.8 25 84 -35 74 29 19 73 38 28 74 45 38 73 22 22 -0.60 - 37 0 0 73 56 58 23 36 6.6 25 83 -34 74 22 36 73 31 27 74 39 0 73 15 16 -0.60 - 38 0 0 73 49 47 23 36 8.4 25 82 -34 74 15 33 73 24 8 74 32 3 73 7 50 -0.60 - 39 0 0 73 42 16 23 36 10.2 25 81 -34 74 8 12 73 16 28 74 24 48 73 0 5 -0.60 - 40 0 0 73 34 26 23 36 12.1 24 80 -34 74 0 31 73 8 29 74 17 14 72 52 0 -0.60 - 41 0 0 73 26 15 23 36 13.9 24 79 -34 73 52 31 73 0 8 74 9 19 72 43 33 -0.60 - 42 0 0 73 17 44 23 36 15.7 24 78 -34 73 44 9 72 51 27 74 1 5 72 34 46 -0.60 - 43 0 0 73 8 51 23 36 17.6 23 77 -34 73 35 27 72 42 23 73 52 29 72 25 36 -0.60 - 44 0 0 72 59 36 23 36 19.4 23 76 -33 73 26 23 72 32 57 73 43 32 72 16 3 -0.60 - 45 0 0 72 49 58 23 36 21.3 23 75 -33 73 16 56 72 23 8 73 34 13 72 6 7 -0.60 - 46 0 0 72 39 56 23 36 23.1 22 74 -33 73 7 7 72 12 55 73 24 31 71 55 47 -0.60 - 47 0 0 72 29 31 23 36 25.0 22 73 -33 72 56 53 72 2 18 73 14 25 71 45 1 -0.60 - 48 0 0 72 18 40 23 36 26.9 22 72 -33 72 46 15 71 51 15 73 3 55 71 33 51 -0.60 - 49 0 0 72 7 24 23 36 28.8 21 71 -32 72 35 11 71 39 46 72 53 0 71 22 14 -0.60 - 50 0 0 71 55 41 23 36 30.6 21 70 -32 72 23 42 71 27 50 72 41 39 71 10 10 -0.60 - 51 0 0 71 43 30 23 36 32.5 21 70 -32 72 11 45 71 15 26 72 29 51 70 57 37 -0.60 - 52 0 0 71 30 51 23 36 34.4 20 69 -32 71 59 20 71 2 33 72 17 35 70 44 36 -0.60 - 53 0 0 71 17 43 23 36 36.3 20 68 -32 71 46 26 70 49 11 72 4 50 70 31 5 -0.60 - 54 0 0 71 4 5 23 36 38.2 19 67 -31 71 33 3 70 35 18 71 51 36 70 17 3 -0.60 - 55 0 0 70 49 55 23 36 40.1 19 66 -31 71 19 8 70 20 53 71 37 52 70 2 29 -0.60 - 56 0 0 70 35 13 23 36 42.0 19 65 -31 71 4 41 70 5 56 71 23 35 69 47 22 -0.60 - 57 0 0 70 19 57 23 36 43.9 18 64 -31 70 49 41 69 50 24 71 8 45 69 31 40 -0.60 - 58 0 0 70 4 6 23 36 45.8 18 63 -31 70 34 7 69 34 18 70 53 22 69 15 24 -0.60 - 59 0 0 69 47 40 23 36 47.7 17 62 -30 70 17 57 69 17 35 70 37 23 68 58 31 -0.60 - 60 0 0 69 30 36 23 36 49.6 17 61 -30 70 1 11 69 0 14 70 20 47 68 41 0 -0.60 - 61 0 0 69 12 54 23 36 51.5 17 60 -30 69 43 46 68 42 15 70 3 34 68 22 50 -0.60 - 62 0 0 68 54 32 23 36 53.4 16 59 -29 69 25 42 68 23 36 69 45 41 68 3 59 -0.60 - 63 0 0 68 35 29 23 36 55.3 16 58 -29 69 6 57 68 4 15 69 27 8 67 44 27 -0.60 - 64 0 0 68 15 43 23 36 57.2 15 57 -29 68 47 29 67 44 10 69 7 53 67 24 12 -0.60 - 65 0 0 67 55 12 23 36 59.0 15 56 -29 68 27 18 67 23 22 68 47 53 67 3 11 -0.61 - 66 0 0 67 33 56 23 37 0.9 14 55 -28 68 6 21 67 1 47 68 27 9 66 41 25 -0.61 - 67 0 0 67 11 53 23 37 2.7 14 54 -28 67 44 37 66 39 25 68 5 38 66 18 51 -0.61 - 68 0 0 66 49 0 23 37 4.5 13 53 -28 67 22 4 66 16 13 67 43 18 65 55 27 -0.61 - 69 0 0 66 25 17 23 37 6.3 12 52 -27 66 58 41 65 52 10 67 20 7 65 31 12 -0.61 - 70 0 0 66 0 42 23 37 8.0 12 51 -27 66 34 25 65 27 15 66 56 5 65 6 5 -0.61 - 71 0 0 65 35 12 23 37 9.7 11 51 -26 66 9 16 65 1 26 66 31 9 64 40 3 -0.61 - 72 0 0 65 8 46 23 37 11.4 11 50 -26 65 43 11 64 34 40 66 5 17 64 13 4 -0.61 - 73 0 0 64 41 23 23 37 13.0 10 49 -26 65 16 8 64 6 56 65 38 27 63 45 8 -0.62 - 74 0 0 64 12 59 23 37 14.6 9 48 -25 64 48 5 63 38 13 65 10 38 63 16 12 -0.62 - 75 0 0 63 43 34 23 37 16.1 9 47 -25 64 19 1 63 8 28 64 41 48 62 46 15 -0.62 - 76 0 0 63 13 6 23 37 17.6 8 46 -24 63 48 54 62 37 39 64 11 54 62 15 14 -0.63 - 77 0 0 62 41 33 23 37 18.9 7 45 -24 63 17 41 62 5 46 63 40 54 61 43 8 -0.63 - 78 0 0 62 8 52 23 37 20.2 7 44 -23 62 45 21 61 32 45 63 8 48 61 9 55 -0.64 - 79 0 0 61 35 3 23 37 21.4 6 43 -23 62 11 52 60 58 36 62 35 32 60 35 33 -0.64 - 80 0 0 61 0 3 23 37 22.5 5 42 -22 61 37 12 60 23 16 62 1 5 60 0 1 -0.65 - 81 0 0 60 23 50 23 37 23.4 4 42 -22 61 1 19 59 46 44 61 25 26 59 23 17 -0.67 - 82 0 0 59 46 23 23 37 24.3 4 41 -21 60 24 12 59 8 58 60 48 31 58 45 19 -0.69 - 83 0 0 59 7 41 23 37 25.0 3 40 -20 59 45 49 58 29 57 60 10 20 58 6 6 -0.73 - 84 0 0 58 27 41 23 37 25.5 2 39 -20 59 6 8 57 49 39 59 30 52 57 25 37 -0.79 - 85 0 0 57 46 23 23 37 25.9 1 38 -19 58 25 7 57 8 3 58 50 3 56 43 50 -0.97 - 86 0 0 57 3 45 23 37 26.1 0 37 -18 57 42 47 .. .. .. 58 7 54 .. .. .. -2.39 Uncertainty in time = +/- 4 secs Prediction of 2020 Oct 28.0 Data for the target star ------------------------ * name: UCAC4 581-044034 * constellation : Leo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 09 26 28.4593 DE: +26 05 40.606 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 09 26 28.4595 DE: +26 05 40.606 * position source: Gaia DR2 * standard error: RA,DE [mas]: (1.000,0.700) * V mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (636) Erika asteroid class: approx. diameter [km]: 75 approx. diameter ["]: 0.041 distance from Earth [AU]: 2.52260 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: Preston date of fit: 2020 Oct 28 source of used astrometry: MPC, FASTT, TMO number of used observations: 2967 number of rejected observations: 10 time covered by the observations: 1963 Apr 27 - 2020 Oct 21 1 sigma uncertainty ellipse (major, minor, PA): 0.021", 0.012", 109.9° remarks: * orbital elements for (636)Erika : Mean anomaly = 140.96713389 deg Arg. of pericenter = 298.58796727 deg Long. of node = 34.58846137 deg Inclination = 7.92770254 deg Eccentricity = 0.16928472 Semimajor axis = 2.91334363 AU Perihelion dist = 2.42015906 AU Mag: H = 9.60, G = 0.15 Epoch of elements : MJD 59209.97700000 TDT (2020 Dec 26.9770) ------ occelmnt file for Occult BEGIN ----------------------------------- Preston2020Oct28,8.3,2020,12,26,23.4573,0.31143,0.40552,-4.07185,3.13299,-0.00396,0.00045,0.00000,0.00000 54.1495,26.0025,-171.60,-23.32 UCAC4 581-044034,9.44123873,26.0946128,0.00,12.44,0.00,0.0,0,,9.46150185,26.0024510 636,Erika,14.92,75.3,2.5226,0,0,-1.053,10.92,,4.6 0,140.7735,2020,12,26,298.5880,34.5885,7.9277,0.16928,2.91334,2.42016,9.60,5.0,0.15 1.319,0.0210,0.0120,110,0.0131,Known errors 20201226_044034,59150.00 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2020 Oct 28, 21:06 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org