IOTA/IOTA-ES occultation update for (1484) Postrema / TYC 5590-00711-1 event on 2024 Sep 07, 20:26 UT Visible from Summary ------- On 2024 Sep 07 UT, the 45.146 km diameter asteroid (1484) Postrema will occult a 11.8 mag star in the constellation Libra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.09 mag to 15.87 mag (the magnitude of the asteroid) for at most 1.260 seconds. This update is based on, 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: 100 * date and approx. time of event: 2024 Sep 07, 20:23 - 2024 Sep 07, 20:28 * geocentric midpoint of event [JD]: 2460561.35140508 * magnitude of target star: 11.81 * magnitude drop [mag]: 4.09 * estimated maximum duration [s]: 1.260 * Moon: 19 % sunlit, 9° distance * Sun: 59° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 66 * 1 sigma uncertainty interval [path widths]: +/- 0.08 * 1 sigma uncertainty interval [seconds]: +/- 0.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.009) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.001", 123°) * approx speed of asteroid's shadow [km/s]: 35.8501 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5590-00711-1 by 1484 Postrema on 2024 Sep 7 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 ' " Latitude Latitude Latitude Latitude -117 0 0 .. .. .... .. .. .. .. .. .. 68 43 12 .. .. .. 68 39 1 .. .. .. .... -116 0 0 68 46 27 20 24 1.1 1 136 27 68 20 54 69 12 19 68 16 41 69 16 38 .... -115 0 0 68 23 39 20 24 1.1 1 137 27 67 57 56 68 49 41 67 53 42 68 54 2 -0.60 -114 0 0 68 0 11 20 24 1.2 2 138 27 67 34 18 68 26 22 67 30 1 68 30 45 -0.76 -113 0 0 67 36 0 20 24 1.2 2 139 27 67 9 58 68 2 22 67 5 40 68 6 46 -0.84 -112 0 0 67 11 8 20 24 1.3 3 140 28 66 44 56 67 37 39 66 40 37 67 42 5 -0.89 -111 0 0 66 45 33 20 24 1.5 3 141 28 66 19 13 67 12 13 66 14 52 67 16 41 -0.92 -110 0 0 66 19 15 20 24 1.6 4 142 28 65 52 46 66 46 4 65 48 24 66 50 33 -0.94 -109 0 0 65 52 13 20 24 1.8 4 143 29 65 25 37 66 19 10 65 21 14 66 23 41 -0.96 -108 0 0 65 24 28 20 24 2.1 5 144 29 64 57 44 65 51 33 64 53 19 65 56 5 -0.97 -107 0 0 64 55 59 20 24 2.3 6 145 29 64 29 7 65 23 11 64 24 42 65 27 44 -0.98 -106 0 0 64 26 45 20 24 2.6 6 146 29 63 59 47 64 54 4 63 55 20 64 58 38 -0.99 -105 0 0 63 56 47 20 24 3.0 7 146 30 63 29 43 64 24 12 63 25 15 64 28 47 -1.00 -104 0 0 63 26 4 20 24 3.4 8 147 30 62 58 55 63 53 35 62 54 27 63 58 11 -1.00 -103 0 0 62 54 38 20 24 3.8 8 148 30 62 27 24 63 22 14 62 22 54 63 26 51 -1.01 -102 0 0 62 22 27 20 24 4.3 9 149 30 61 55 9 62 50 7 61 50 39 62 54 45 -1.01 -101 0 0 61 49 33 20 24 4.9 10 150 31 61 22 11 62 17 17 61 17 41 62 21 56 -1.02 -100 0 0 61 15 56 20 24 5.4 11 151 31 60 48 31 61 43 43 60 44 0 61 48 22 -1.02 - 99 0 0 60 41 36 20 24 6.1 11 152 31 60 14 9 61 9 26 60 9 37 61 14 5 -1.02 - 98 0 0 60 6 34 20 24 6.8 12 153 31 59 39 5 60 34 26 59 34 34 60 39 5 -1.02 - 97 0 0 59 30 52 20 24 7.5 13 154 32 59 3 22 59 58 44 58 58 50 60 3 24 -1.03 - 96 0 0 58 54 29 20 24 8.4 14 155 32 58 26 59 59 22 22 58 22 27 59 27 2 -1.03 - 95 0 0 58 17 28 20 24 9.3 14 156 32 57 49 58 58 45 20 57 45 26 58 50 0 -1.03 - 94 0 0 57 39 49 20 24 10.2 15 156 32 57 12 20 58 7 40 57 7 48 58 12 20 -1.03 - 93 0 0 57 1 34 20 24 11.2 16 157 32 56 34 6 57 29 23 56 29 35 57 34 2 -1.04 - 92 0 0 56 22 43 20 24 12.3 17 158 32 55 55 19 56 50 30 55 50 48 56 55 9 -1.04 - 91 0 0 55 43 20 20 24 13.5 18 159 33 55 15 58 56 11 4 55 11 28 56 15 42 -1.04 - 90 0 0 55 3 25 20 24 14.7 18 160 33 54 36 7 55 31 5 54 31 37 55 35 42 -1.04 - 89 0 0 54 23 0 20 24 16.0 19 161 33 53 55 46 54 50 35 53 51 17 54 55 12 -1.04 - 88 0 0 53 42 7 20 24 17.4 20 162 33 53 14 58 54 9 37 53 10 30 54 14 14 -1.04 - 87 0 0 53 0 48 20 24 18.8 21 163 33 52 33 45 53 28 13 52 29 17 53 32 48 -1.04 - 86 0 0 52 19 6 20 24 20.4 22 164 33 51 52 8 52 46 24 51 47 42 52 50 58 -1.05 - 85 0 0 51 37 1 20 24 22.0 23 165 33 51 10 10 52 4 12 51 5 45 52 8 45 -1.05 - 84 0 0 50 54 37 20 24 23.7 23 166 33 50 27 53 51 21 41 50 23 29 51 26 13 -1.05 - 83 0 0 50 11 55 20 24 25.4 24 167 32 49 45 19 50 38 51 49 40 56 50 43 22 -1.05 - 82 0 0 49 28 58 20 24 27.3 25 168 32 49 2 30 49 55 46 48 58 8 50 0 15 -1.05 - 81 0 0 48 45 49 20 24 29.2 26 169 32 48 19 29 49 12 28 48 15 8 49 16 55 -1.05 - 80 0 0 48 2 29 20 24 31.2 27 170 32 47 36 17 48 28 59 47 31 58 48 33 25 -1.05 - 79 0 0 47 19 0 20 24 33.2 28 171 32 46 52 58 47 45 21 46 48 41 47 49 45 -1.05 - 78 0 0 46 35 26 20 24 35.4 28 172 32 46 9 33 47 1 37 46 5 17 47 5 59 -1.05 - 77 0 0 45 51 48 20 24 37.6 29 173 31 45 26 5 46 17 49 45 21 51 46 22 10 -1.06 - 76 0 0 45 8 9 20 24 39.9 30 174 31 44 42 36 45 33 59 44 38 23 45 38 19 -1.06 - 75 0 0 44 24 31 20 24 42.2 31 175 31 43 59 8 44 50 11 43 54 57 44 54 28 -1.06 - 74 0 0 43 40 56 20 24 44.7 32 176 30 43 15 44 44 6 26 43 11 35 44 10 41 -1.06 - 73 0 0 42 57 27 20 24 47.1 32 177 30 42 32 26 43 22 46 42 28 18 43 27 0 -1.06 - 72 0 0 42 14 6 20 24 49.7 33 178 29 41 49 15 42 39 14 41 45 9 42 43 26 -1.06 - 71 0 0 41 30 56 20 24 52.3 34 180 29 41 6 15 41 55 52 41 2 11 42 0 2 -1.06 - 70 0 0 40 47 57 20 24 55.0 35 181 28 40 23 27 41 12 42 40 19 25 41 16 50 -1.06 - 69 0 0 40 5 12 20 24 57.7 35 182 28 39 40 54 40 29 46 39 36 53 40 33 52 -1.06 - 68 0 0 39 22 44 20 25 0.5 36 183 27 38 58 36 39 47 6 38 54 37 39 51 10 -1.06 - 67 0 0 38 40 33 20 25 3.4 37 185 27 38 16 37 39 4 44 38 12 39 39 8 47 -1.06 - 66 0 0 37 58 43 20 25 6.3 37 186 26 37 34 57 38 22 43 37 31 2 38 26 43 -1.06 - 65 0 0 37 17 14 20 25 9.2 38 187 26 36 53 39 37 41 3 36 49 46 37 45 2 -1.07 - 64 0 0 36 36 9 20 25 12.2 38 188 25 36 12 45 36 59 47 36 8 53 37 3 43 -1.07 - 63 0 0 35 55 29 20 25 15.2 39 190 24 35 32 16 36 18 56 35 28 26 36 22 50 -1.07 - 62 0 0 35 15 16 20 25 18.3 39 191 24 34 52 14 35 38 31 34 48 25 35 42 24 -1.07 - 61 0 0 34 35 31 20 25 21.4 40 192 23 34 12 39 34 58 36 34 8 53 35 2 27 -1.07 - 60 0 0 33 56 16 20 25 24.5 40 194 22 33 33 35 34 19 10 33 29 50 34 22 59 -1.07 - 59 0 0 33 17 32 20 25 27.6 41 195 22 32 55 1 33 40 15 32 51 18 33 44 3 -1.07 - 58 0 0 32 39 21 20 25 30.8 41 197 21 32 17 0 33 1 53 32 13 19 33 5 39 -1.07 - 57 0 0 32 1 43 20 25 34.0 41 198 20 31 39 33 32 24 5 31 35 53 32 27 49 -1.07 - 56 0 0 31 24 40 20 25 37.2 42 199 19 31 2 40 31 46 52 30 59 1 31 50 34 -1.07 - 55 0 0 30 48 13 20 25 40.4 42 201 18 30 26 22 31 10 15 30 22 46 31 13 55 -1.07 - 54 0 0 30 12 23 20 25 43.7 42 202 18 29 50 42 30 34 15 29 47 7 30 37 54 -1.07 - 53 0 0 29 37 11 20 25 46.9 42 204 17 29 15 39 29 58 53 29 12 6 30 2 30 -1.08 - 52 0 0 29 2 38 20 25 50.2 43 205 16 28 41 15 29 24 10 28 37 43 29 27 46 -1.08 - 51 0 0 28 28 44 20 25 53.4 43 207 15 28 7 31 28 50 7 28 4 0 28 53 42 -1.08 - 50 0 0 27 55 31 20 25 56.7 43 208 14 27 34 27 28 16 45 27 30 58 28 20 18 -1.08 - 49 0 0 27 22 59 20 25 59.9 43 210 13 27 2 3 27 44 4 26 58 36 27 47 35 -1.08 - 48 0 0 26 51 9 20 26 3.2 43 211 12 26 30 22 27 12 5 26 26 55 27 15 35 -1.08 - 47 0 0 26 20 1 20 26 6.4 43 212 11 25 59 22 26 40 49 25 55 57 26 44 18 -1.08 - 46 0 0 25 49 37 20 26 9.6 43 214 10 25 29 6 26 10 17 25 25 42 26 13 43 -1.08 - 45 0 0 25 19 56 20 26 12.9 43 215 10 24 59 33 25 40 27 24 56 10 25 43 53 -1.08 - 44 0 0 24 50 59 20 26 16.1 42 217 9 24 30 44 25 11 23 24 27 23 25 14 47 -1.08 - 43 0 0 24 22 46 20 26 19.2 42 218 8 24 2 39 24 43 3 23 59 19 24 46 25 -1.08 - 42 0 0 23 55 19 20 26 22.4 42 219 7 23 35 18 24 15 28 23 32 0 24 18 49 -1.08 - 41 0 0 23 28 37 20 26 25.5 42 221 6 23 8 43 23 48 38 23 5 26 23 51 59 -1.08 - 40 0 0 23 2 40 20 26 28.7 42 222 5 22 42 53 23 22 35 22 39 37 23 25 54 -1.08 - 39 0 0 22 37 29 20 26 31.7 41 223 4 22 17 49 22 57 17 22 14 34 23 0 35 -1.08 - 38 0 0 22 13 4 20 26 34.8 41 224 3 21 53 30 22 32 46 21 50 16 22 36 3 -1.08 - 37 0 0 21 49 26 20 26 37.8 40 226 2 21 29 58 22 9 1 21 26 45 22 12 17 -1.08 - 36 0 0 21 26 33 20 26 40.8 40 227 1 21 7 12 21 46 3 21 4 0 21 49 17 -1.09 - 35 0 0 21 4 28 20 26 43.8 40 228 0 20 45 12 21 23 51 20 42 1 21 27 5 -1.09 - 34 0 0 20 43 10 20 26 46.7 39 229 -1 20 23 59 21 2 27 20 20 49 21 5 40 -1.09 - 33 0 0 20 22 38 20 26 49.6 39 230 -2 20 3 33 20 41 50 20 0 24 20 45 2 -1.09 - 32 0 0 20 2 53 20 26 52.4 38 231 -3 19 43 54 20 22 0 19 40 45 20 25 11 -1.09 - 31 0 0 19 43 56 20 26 55.3 38 232 -4 19 25 1 20 2 58 19 21 53 20 6 8 -1.09 - 30 0 0 19 25 46 20 26 58.0 37 233 -5 19 6 56 19 44 43 19 3 49 19 47 52 -1.09 - 29 0 0 19 8 23 20 27 0.7 36 234 -6 18 49 37 19 27 16 18 46 31 19 30 24 -1.09 - 28 0 0 18 51 47 20 27 3.4 36 235 -7 18 33 6 19 10 36 18 30 0 19 13 44 -1.09 - 27 0 0 18 35 59 20 27 6.0 35 236 -8 18 17 22 18 54 43 18 14 17 18 57 51 -1.09 - 26 0 0 18 20 58 20 27 8.6 34 236 -9 18 2 25 18 39 38 17 59 21 18 42 45 -1.09 - 25 0 0 18 6 45 20 27 11.2 34 237 -10 17 48 15 18 25 21 17 45 11 18 28 27 -1.09 - 24 0 0 17 53 19 20 27 13.6 33 238 -11 17 34 52 18 11 52 17 31 49 18 14 57 -1.09 - 23 0 0 17 40 40 20 27 16.1 32 239 -12 17 22 17 17 59 10 17 19 14 18 2 14 -1.09 - 22 0 0 17 28 49 20 27 18.5 32 239 -13 17 10 29 17 47 15 17 7 27 17 50 19 -1.09 - 21 0 0 17 17 45 20 27 20.8 31 240 -14 16 59 27 17 36 8 16 56 26 17 39 12 -1.09 - 20 0 0 17 7 28 20 27 23.1 30 241 -15 16 49 13 17 25 49 16 46 12 17 28 52 -1.09 - 19 0 0 16 57 58 20 27 25.3 29 241 -16 16 39 46 17 16 17 16 36 46 17 19 20 -1.09 - 18 0 0 16 49 16 20 27 27.4 29 242 -17 16 31 6 17 7 32 16 28 6 17 10 35 -1.09 - 17 0 0 16 41 21 20 27 29.5 28 243 -18 16 23 13 16 59 35 16 20 13 17 2 37 -1.09 - 16 0 0 16 34 13 20 27 31.6 27 243 -19 16 16 7 16 52 25 16 13 7 16 55 27 -1.09 - 15 0 0 16 27 52 20 27 33.6 26 244 -20 16 9 48 16 46 2 16 6 49 16 49 4 -1.09 - 14 0 0 16 22 18 20 27 35.5 25 244 -21 16 4 16 16 40 27 16 1 16 16 43 29 -1.10 - 13 0 0 16 17 32 20 27 37.4 25 245 -22 15 59 30 16 35 39 15 56 31 16 38 40 -1.10 - 12 0 0 16 13 32 20 27 39.2 24 245 -23 15 55 32 16 31 39 15 52 33 16 34 40 -1.10 - 11 0 0 16 10 19 20 27 40.9 23 246 -24 15 52 20 16 28 25 15 49 21 16 31 26 -1.10 - 10 0 0 16 7 54 20 27 42.6 22 246 -24 15 49 55 16 25 58 15 46 56 16 28 59 -1.10 - 9 0 0 16 6 15 20 27 44.2 21 247 -25 15 48 16 16 24 19 15 45 18 16 27 19 -1.10 - 8 0 0 16 5 22 20 27 45.8 20 247 -26 15 47 25 16 23 26 15 44 26 16 26 27 -1.10 - 7 0 0 16 5 17 20 27 47.3 19 248 -27 15 47 19 16 23 21 15 44 21 16 26 21 -1.10 - 6 0 0 16 5 58 20 27 48.7 18 248 -28 15 48 1 16 24 2 15 45 2 16 27 3 -1.10 - 5 0 0 16 7 27 20 27 50.1 18 248 -29 15 49 29 16 25 31 15 46 30 16 28 31 -1.10 - 4 0 0 16 9 41 20 27 51.4 17 249 -30 15 51 43 16 27 46 15 48 44 16 30 46 -1.10 - 3 0 0 16 12 43 20 27 52.6 16 249 -31 15 54 44 16 30 48 15 51 45 16 33 49 -1.10 - 2 0 0 16 16 31 20 27 53.8 15 249 -32 15 58 31 16 34 37 15 55 32 16 37 38 -1.11 - 1 0 0 16 21 5 20 27 54.8 14 250 -33 16 3 5 16 39 12 16 0 6 16 42 13 -1.11 0 0 0 16 26 27 20 27 55.9 13 250 -34 16 8 25 16 44 35 16 5 25 16 47 36 -1.11 1 0 0 16 32 34 20 27 56.8 12 250 -35 16 14 31 16 50 44 16 11 32 16 53 45 -1.11 2 0 0 16 39 28 20 27 57.7 11 251 -35 16 21 23 16 57 40 16 18 24 17 0 41 -1.11 3 0 0 16 47 9 20 27 58.5 10 251 -36 16 29 2 17 5 22 16 26 2 17 8 24 -1.12 4 0 0 16 55 36 20 27 59.2 9 251 -37 16 37 27 17 13 51 16 34 27 17 16 53 -1.12 5 0 0 17 4 49 20 27 59.9 8 252 -38 16 46 38 17 23 6 16 43 38 17 26 9 -1.13 6 0 0 17 14 49 20 28 0.5 7 252 -39 16 56 36 17 33 8 16 53 35 17 36 12 -1.13 7 0 0 17 25 35 20 28 1.0 6 252 -40 17 7 19 17 43 57 17 4 18 17 47 1 -1.14 8 0 0 17 37 7 20 28 1.4 5 253 -40 17 18 48 17 55 32 17 15 47 17 58 36 -1.15 9 0 0 17 49 25 20 28 1.8 4 253 -41 17 31 4 18 7 53 17 28 1 18 10 58 -1.17 10 0 0 18 2 30 20 28 2.1 3 253 -42 17 44 5 18 21 1 17 41 2 18 24 6 -1.20 11 0 0 18 16 20 20 28 2.3 2 254 -43 17 57 52 18 34 55 17 54 49 18 38 0 -1.25 12 0 0 18 30 57 20 28 2.5 1 254 -43 18 12 25 18 49 35 18 9 22 18 52 41 -1.37 13 0 0 18 46 19 20 28 2.5 0 254 -44 18 27 44 19 5 1 18 24 40 19 8 8 -2.19 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.5 Data for the target star ------------------------ * name: TYC 5590-00711-1 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 14 50 21.5251 DE: -14 41 47.893 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 14 50 21.5250 DE: -14 41 47.893 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.8 * B mag [mag]: 12.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1484) Postrema asteroid class: approx. diameter [km]: 45 approx. diameter ["]: 0.024 distance from Earth [AU]: 2.64120 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 date of fit: 2023 Apr 24 source of used astrometry: MPC, JPL number of used observations: 0 number of rejected observations: 0 time covered by the observations: 1800 Jan 01 - 1800 Jan 01 1 sigma uncertainty ellipse (major, minor, PA): 0.016", 0.001", 123.471° remarks: * orbital elements for (1484)Postrema : Mean anomaly = 31.3478545276 deg Arg. of pericenter = 126.9359826510 deg Long. of node = 72.6009425726 deg Inclination = 17.2963491337 deg Eccentricity = 0.2068972431 Semimajor axis = 2.7366352636 AU Perihelion dist = 2.1704329721 AU Mag: H = 10.89, G = 0.15 Epoch of elements : MJD 60560.85140513 TDT (2024 Sep 07.8514) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr24,1.26,2024,9,7,20.433722,0.339833,0.648650,17.919216,-9.399414,0.004491,-0.001286,-0.000001,0.000000 -70.9824,-14.7982,-127.07,5.64,False TYC 5590-00711-1,14.83931256,-14.6966371,12.16,11.81,11.62,0.0,0,,14.86177094,-14.7981834,4.09,3.83,0,0,0 1484,Postrema,15.87,45.146,2.6412,0,0,4.114,-31.29,,2.2,0 0,31.1625,2024,9,7,126.9360,72.6009,17.2963,0.20690,2.73664,2.17043,10.89,5.0,0.15 1.083,0.0160,0.0011,123,0.0020,Known errors,1.04,0,-1,-1 20240907_0711-1,60140.55 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:08 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org