IOTA/IOTA-ES occultation update for (2364) Seillier / TYC 7421-00547-1 event on 2024 Jul 24, 21:32 UT Visible from Summary ------- On 2024 Jul 24 UT, the 20.571 km diameter asteroid (2364) Seillier will occult a 9.9 mag star in the constellation Corona Australis for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.05 mag to 15.99 mag (the magnitude of the asteroid) for at most 2.060 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: 99 * date and approx. time of event: 2024 Jul 24, 21:24 - 2024 Jul 24, 21:40 * geocentric midpoint of event [JD]: 2460516.39750554 * magnitude of target star: 9.94 * magnitude drop [mag]: 6.05 * estimated maximum duration [s]: 2.060 * Moon: 83 % sunlit, 69° distance * Sun: 155° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 28 * 1 sigma uncertainty interval [path widths]: +/- 0.29 * 1 sigma uncertainty interval [seconds]: +/- 4.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.032, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.032", 0.004", 90°) * approx speed of asteroid's shadow [km/s]: 9.9622 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7421-00547-1 by 2364 Seillier on 2024 Jul 24 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 - 45 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 32 42 58 .... - 44 0 0 32 8 27 21 40 12.2 1 136 3 32 19 34 31 57 23 32 26 5 31 50 57 .... - 43 0 0 31 16 54 21 40 11.7 2 137 2 31 27 53 31 5 58 31 34 20 30 59 35 -0.58 - 42 0 0 30 26 4 21 40 10.8 3 137 0 30 36 55 30 15 15 30 43 18 30 8 57 -0.72 - 41 0 0 29 35 57 21 40 9.6 5 138 -1 29 46 42 29 25 16 29 53 0 29 19 2 -0.79 - 40 0 0 28 46 37 21 40 7.9 6 138 -2 28 57 14 28 36 2 29 3 28 28 29 53 -0.82 - 39 0 0 27 58 4 21 40 5.9 7 139 -3 28 8 34 27 47 36 28 14 43 27 41 30 -0.85 - 38 0 0 27 10 19 21 40 3.6 8 139 -4 27 20 42 26 59 58 27 26 47 26 53 56 -0.87 - 37 0 0 26 23 23 21 40 0.9 9 140 -5 26 33 40 26 13 9 26 39 41 26 7 11 -0.88 - 36 0 0 25 37 18 21 39 57.8 10 140 -6 25 47 28 25 27 10 25 53 25 25 21 16 -0.89 - 35 0 0 24 52 4 21 39 54.4 12 141 -7 25 2 7 24 42 2 25 8 1 24 36 12 -0.90 - 34 0 0 24 7 41 21 39 50.7 13 141 -9 24 17 39 23 57 46 24 23 29 23 51 59 -0.91 - 33 0 0 23 24 12 21 39 46.7 14 142 -10 23 34 3 23 14 23 23 39 49 23 8 39 -0.91 - 32 0 0 22 41 35 21 39 42.3 15 142 -11 22 51 20 22 31 52 22 57 3 22 26 12 -0.92 - 31 0 0 21 59 52 21 39 37.7 16 143 -12 22 9 31 21 50 14 22 15 11 21 44 38 -0.92 - 30 0 0 21 19 3 21 39 32.7 17 143 -13 21 28 37 21 9 31 21 34 13 21 3 57 -0.92 - 29 0 0 20 39 8 21 39 27.5 18 143 -14 20 48 36 20 29 41 20 54 9 20 24 11 -0.92 - 28 0 0 20 0 7 21 39 22.0 19 144 -15 20 9 30 19 50 46 20 15 0 19 45 18 -0.93 - 27 0 0 19 22 1 21 39 16.2 20 144 -16 19 31 19 19 12 45 19 36 46 19 7 20 -0.93 - 26 0 0 18 44 50 21 39 10.2 21 145 -17 18 54 3 18 35 38 18 59 27 18 30 17 -0.93 - 25 0 0 18 8 33 21 39 3.9 22 145 -19 18 17 42 17 59 26 18 23 3 17 54 8 -0.93 - 24 0 0 17 33 11 21 38 57.4 23 146 -20 17 42 15 17 24 9 17 47 34 17 18 53 -0.93 - 23 0 0 16 58 44 21 38 50.6 24 146 -21 17 7 43 16 49 47 17 12 59 16 44 33 -0.93 - 22 0 0 16 25 12 21 38 43.7 25 147 -22 16 34 7 16 16 19 16 39 20 16 11 8 -0.93 - 21 0 0 15 52 34 21 38 36.5 26 147 -23 16 1 25 15 43 45 16 6 36 15 38 36 -0.93 - 20 0 0 15 20 51 21 38 29.1 27 148 -24 15 29 38 15 12 6 15 34 46 15 6 59 -0.93 - 19 0 0 14 50 2 21 38 21.5 28 148 -25 14 58 45 14 41 20 15 3 51 14 36 16 -0.93 - 18 0 0 14 20 7 21 38 13.7 29 149 -26 14 28 46 14 11 29 14 33 50 14 6 27 -0.93 - 17 0 0 13 51 6 21 38 5.8 30 149 -27 13 59 41 13 42 32 14 4 43 13 37 32 -0.93 - 16 0 0 13 22 58 21 37 57.7 31 150 -28 13 31 30 13 14 28 13 36 30 13 9 30 -0.93 - 15 0 0 12 55 44 21 37 49.4 32 151 -29 13 4 13 12 47 17 13 9 11 12 42 21 -0.93 - 14 0 0 12 29 24 21 37 40.9 33 151 -30 12 37 49 12 21 0 12 42 45 12 16 6 -0.93 - 13 0 0 12 3 56 21 37 32.3 33 152 -31 12 12 18 11 55 35 12 17 13 11 50 43 -0.93 - 12 0 0 11 39 21 21 37 23.6 34 152 -32 11 47 41 11 31 3 11 52 33 11 26 13 -0.93 - 11 0 0 11 15 39 21 37 14.7 35 153 -33 11 23 55 11 7 24 11 28 46 11 2 35 -0.93 - 10 0 0 10 52 49 21 37 5.7 36 154 -34 11 1 2 10 44 37 11 5 51 10 39 49 -0.93 - 9 0 0 10 30 51 21 36 56.6 37 154 -35 10 39 2 10 22 41 10 43 49 10 17 55 -0.93 - 8 0 0 10 9 44 21 36 47.3 37 155 -36 10 17 53 10 1 37 10 22 39 9 56 53 -0.93 - 7 0 0 9 49 29 21 36 38.0 38 156 -37 9 57 35 9 41 24 10 2 20 9 36 41 -0.93 - 6 0 0 9 30 5 21 36 28.5 39 157 -38 9 38 9 9 22 3 9 42 52 9 17 21 -0.93 - 5 0 0 9 11 32 21 36 18.9 39 157 -39 9 19 34 9 3 32 9 24 16 8 58 52 -0.93 - 4 0 0 8 53 50 21 36 9.3 40 158 -40 9 1 49 8 45 52 9 6 30 8 41 13 -0.93 - 3 0 0 8 36 58 21 35 59.5 41 159 -41 8 44 56 8 29 2 8 49 35 8 24 24 -0.93 - 2 0 0 8 20 56 21 35 49.7 41 160 -42 8 28 52 8 13 2 8 33 30 8 8 25 -0.93 - 1 0 0 8 5 44 21 35 39.8 42 161 -43 8 13 38 7 57 52 8 18 16 7 53 16 -0.93 0 0 0 7 51 22 21 35 29.8 42 161 -44 7 59 14 7 43 31 8 3 51 7 38 56 -0.93 1 0 0 7 37 50 21 35 19.7 43 162 -45 7 45 40 7 30 0 7 50 16 7 25 26 -0.93 2 0 0 7 25 6 21 35 9.6 43 163 -46 7 32 55 7 17 18 7 37 30 7 12 45 -0.93 3 0 0 7 13 12 21 34 59.4 44 164 -46 7 21 0 7 5 25 7 25 33 7 0 53 -0.93 4 0 0 7 2 6 21 34 49.2 44 165 -47 7 9 53 6 54 21 7 14 26 6 49 49 -0.93 5 0 0 6 51 50 21 34 38.9 44 166 -48 6 59 35 6 44 5 7 4 7 6 39 34 -0.93 6 0 0 6 42 21 21 34 28.5 45 167 -49 6 50 6 6 34 38 6 54 37 6 30 8 -0.93 7 0 0 6 33 42 21 34 18.1 45 168 -50 6 41 25 6 25 59 6 45 56 6 21 29 -0.93 8 0 0 6 25 50 21 34 7.7 46 169 -51 6 33 32 6 18 8 6 38 3 6 13 39 -0.93 9 0 0 6 18 46 21 33 57.2 46 170 -51 6 26 28 6 11 6 6 30 58 6 6 37 -0.93 10 0 0 6 12 31 21 33 46.7 46 171 -52 6 20 12 6 4 51 6 24 42 6 0 22 -0.93 11 0 0 6 7 3 21 33 36.2 46 172 -53 6 14 43 5 59 24 6 19 13 5 54 56 -0.93 12 0 0 6 2 23 21 33 25.7 46 173 -54 6 10 3 5 54 44 6 14 32 5 50 17 -0.93 13 0 0 5 58 31 21 33 15.1 47 174 -54 6 6 11 5 50 53 6 10 39 5 46 25 -0.93 14 0 0 5 55 27 21 33 4.5 47 176 -55 6 3 6 5 47 49 6 7 34 5 43 21 -0.93 15 0 0 5 53 10 21 32 53.9 47 177 -56 6 0 49 5 45 32 6 5 17 5 41 5 -0.93 16 0 0 5 51 40 21 32 43.3 47 178 -56 5 59 19 5 44 3 6 3 47 5 39 36 -0.93 17 0 0 5 50 59 21 32 32.7 47 179 -57 5 58 37 5 43 21 6 3 5 5 38 54 -0.93 18 0 0 5 51 4 21 32 22.0 47 180 -58 5 58 43 5 43 27 6 3 11 5 39 0 -0.93 19 0 0 5 51 58 21 32 11.4 47 181 -58 5 59 36 5 44 20 6 4 5 5 39 53 -0.93 20 0 0 5 53 38 21 32 0.8 47 182 -59 6 1 17 5 46 0 6 5 46 5 41 33 -0.93 21 0 0 5 56 6 21 31 50.2 47 183 -59 6 3 45 5 48 28 6 8 14 5 44 1 -0.93 22 0 0 5 59 22 21 31 39.6 47 184 -60 6 7 2 5 51 44 6 11 30 5 47 16 -0.93 23 0 0 6 3 25 21 31 29.0 47 186 -60 6 11 5 5 55 47 6 15 35 5 51 19 -0.93 24 0 0 6 8 17 21 31 18.4 46 187 -60 6 15 57 6 0 37 6 20 27 5 56 9 -0.93 25 0 0 6 13 56 21 31 7.9 46 188 -61 6 21 37 6 6 15 6 26 6 6 1 47 -0.93 26 0 0 6 20 22 21 30 57.4 46 189 -61 6 28 4 6 12 42 6 32 34 6 8 13 -0.94 27 0 0 6 27 37 21 30 46.9 46 190 -61 6 35 20 6 19 55 6 39 50 6 15 26 -0.94 28 0 0 6 35 40 21 30 36.4 45 191 -62 6 43 23 6 27 57 6 47 55 6 23 28 -0.94 29 0 0 6 44 31 21 30 26.0 45 192 -62 6 52 16 6 36 47 6 56 47 6 32 17 -0.94 30 0 0 6 54 11 21 30 15.6 45 193 -62 7 1 56 6 46 26 7 6 29 6 41 55 -0.94 31 0 0 7 4 39 21 30 5.3 44 194 -62 7 12 25 6 56 53 7 16 59 6 52 21 -0.94 32 0 0 7 15 55 21 29 55.0 44 195 -62 7 23 43 7 8 8 7 28 17 7 3 36 -0.94 33 0 0 7 28 1 21 29 44.8 43 196 -62 7 35 50 7 20 12 7 40 25 7 15 39 -0.94 34 0 0 7 40 56 21 29 34.6 43 197 -62 7 48 47 7 33 6 7 53 22 7 28 32 -0.94 35 0 0 7 54 40 21 29 24.5 42 198 -62 8 2 32 7 46 48 8 7 9 7 42 13 -0.94 36 0 0 8 9 13 21 29 14.5 42 198 -62 8 17 7 8 1 20 8 21 45 7 56 44 -0.94 37 0 0 8 24 36 21 29 4.5 41 199 -62 8 32 32 8 16 41 8 37 11 8 12 4 -0.94 38 0 0 8 40 49 21 28 54.6 41 200 -62 8 48 47 8 32 52 8 53 27 8 28 14 -0.94 39 0 0 8 57 52 21 28 44.8 40 201 -61 9 5 52 8 49 54 9 10 33 8 45 14 -0.94 40 0 0 9 15 46 21 28 35.0 40 202 -61 9 23 48 9 7 45 9 28 30 9 3 5 -0.95 41 0 0 9 34 31 21 28 25.4 39 203 -61 9 42 35 9 26 28 9 47 18 9 21 46 -0.95 42 0 0 9 54 6 21 28 15.9 38 203 -60 10 2 12 9 46 1 10 6 57 9 41 17 -0.95 43 0 0 10 14 32 21 28 6.4 38 204 -60 10 22 41 10 6 25 10 27 27 10 1 40 -0.95 44 0 0 10 35 50 21 27 57.1 37 205 -60 10 44 2 10 27 40 10 48 49 10 22 54 -0.95 45 0 0 10 58 0 21 27 47.9 36 205 -59 11 6 14 10 49 47 11 11 3 10 44 59 -0.95 46 0 0 11 21 1 21 27 38.8 35 206 -58 11 29 18 11 12 46 11 34 9 11 7 56 -0.95 47 0 0 11 44 55 21 27 29.9 35 207 -58 11 53 15 11 36 36 11 58 7 11 31 46 -0.95 48 0 0 12 9 41 21 27 21.0 34 207 -57 12 18 4 12 1 19 12 22 58 11 56 27 -0.95 49 0 0 12 35 20 21 27 12.4 33 208 -57 12 43 46 12 26 55 12 48 42 12 22 1 -0.96 50 0 0 13 1 52 21 27 3.8 32 209 -56 13 10 21 12 53 24 13 15 19 12 48 28 -0.96 51 0 0 13 29 17 21 26 55.4 31 209 -55 13 37 49 13 20 46 13 42 49 13 15 47 -0.96 52 0 0 13 57 35 21 26 47.2 30 210 -54 14 6 11 13 49 1 14 11 13 13 44 0 -0.96 53 0 0 14 26 47 21 26 39.2 30 210 -54 14 35 27 14 18 9 14 40 31 14 13 7 -0.96 54 0 0 14 56 53 21 26 31.3 29 211 -53 15 5 37 14 48 11 15 10 43 14 43 7 -0.96 55 0 0 15 27 53 21 26 23.6 28 212 -52 15 36 41 15 19 8 15 41 50 15 14 1 -0.96 56 0 0 15 59 48 21 26 16.1 27 212 -51 16 8 39 15 50 58 16 13 51 15 45 49 -0.97 57 0 0 16 32 37 21 26 8.8 26 213 -50 16 41 32 16 23 42 16 46 46 16 18 31 -0.97 58 0 0 17 6 20 21 26 1.8 25 213 -49 17 15 20 16 57 21 17 20 36 16 52 7 -0.97 59 0 0 17 40 58 21 25 54.9 24 214 -48 17 50 2 17 31 55 17 55 21 17 26 38 -0.97 60 0 0 18 16 30 21 25 48.3 23 214 -48 18 25 39 18 7 22 18 31 1 18 2 3 -0.97 61 0 0 18 52 57 21 25 41.9 22 215 -47 19 2 11 18 43 45 19 7 36 18 38 23 -0.97 62 0 0 19 30 19 21 25 35.7 21 215 -46 19 39 38 19 21 1 19 45 5 19 15 37 -0.97 63 0 0 20 8 35 21 25 29.8 20 215 -45 20 17 59 19 59 13 20 23 30 19 53 45 -0.98 64 0 0 20 47 46 21 25 24.2 19 216 -43 20 57 15 20 38 18 21 2 49 20 32 47 -0.98 65 0 0 21 27 51 21 25 18.8 18 216 -42 21 37 25 21 18 18 21 43 2 21 12 44 -0.98 66 0 0 22 8 49 21 25 13.8 17 217 -41 22 18 30 21 59 11 22 24 10 21 53 34 -0.98 67 0 0 22 50 42 21 25 9.0 15 217 -40 23 0 28 22 40 58 23 6 12 22 35 17 -0.98 68 0 0 23 33 28 21 25 4.5 14 218 -39 23 43 20 23 23 38 23 49 7 23 17 54 -0.99 69 0 0 24 17 7 21 25 0.3 13 218 -38 24 27 5 24 7 10 24 32 55 24 1 23 -0.99 70 0 0 25 1 38 21 24 56.5 12 219 -37 25 11 42 24 51 35 25 17 36 24 45 44 -0.99 71 0 0 25 47 0 21 24 53.0 11 219 -36 25 57 11 25 36 51 26 3 9 25 30 57 -1.00 72 0 0 26 33 14 21 24 49.8 10 220 -35 26 43 31 26 22 58 26 49 33 26 17 0 -1.00 73 0 0 27 20 17 21 24 46.9 9 220 -34 27 30 42 27 9 55 27 36 48 27 3 53 -1.01 74 0 0 28 8 10 21 24 44.4 7 221 -32 28 18 41 27 57 41 28 24 52 27 51 35 -1.01 75 0 0 28 56 51 21 24 42.3 6 221 -31 29 7 29 28 46 15 29 13 44 28 40 5 -1.02 76 0 0 29 46 18 21 24 40.5 5 222 -30 29 57 4 29 35 35 30 3 22 29 29 21 -1.03 77 0 0 30 36 31 21 24 39.2 4 222 -29 30 47 24 30 25 41 30 53 47 30 19 22 -1.05 78 0 0 31 27 26 21 24 38.2 3 223 -28 31 38 27 31 16 29 31 44 54 31 10 6 -1.09 79 0 0 32 19 5 21 24 37.5 1 223 -26 32 30 13 32 8 0 32 36 45 32 1 32 -1.18 80 0 0 33 11 24 21 24 37.3 0 224 -25 33 22 40 33 0 11 33 29 16 32 53 39 -2.19 Uncertainty in time = +/- 5 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: TYC 7421-00547-1 * constellation : Corona Australis * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 55 04.3540 DE: -37 12 14.526 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 55 04.3538 DE: -37 12 14.528 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 9.9 * B mag [mag]: 10.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2364) Seillier asteroid class: approx. diameter [km]: 21 approx. diameter ["]: 0.014 distance from Earth [AU]: 2.07830 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): 0.032", 0.004", 89.543° remarks: * orbital elements for (2364)Seillier : Mean anomaly = 63.1607752517 deg Arg. of pericenter = 167.3476731952 deg Long. of node = 42.7808808244 deg Inclination = 10.7056492143 deg Eccentricity = 0.1397778130 Semimajor axis = 3.1754774161 AU Perihelion dist = 2.7316161275 AU Mag: H = 11.43, G = 0.15 Epoch of elements : MJD 60515.89750596 TDT (2024 Jul 24.8975) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr24,2.06,2024,7,24,21.540133,-0.003858,0.681769,-5.622833,-0.035217,0.001824,0.001486,0.000001,0.000000 17.9934,-37.1734,-141.46,19.61,False TYC 7421-00547-1,18.91787612,-37.2040351,10.18,9.94,9.81,0.0,0,,18.94599977,-37.1734111,6.05,5.73,0,0,0 2364,Seillier,15.99,20.571,2.0783,0,0,-1.990,-0.15,,1.2,0 0,63.0045,2024,7,24,167.3477,42.7809,10.7056,0.13978,3.17548,2.73162,11.42,5.0,0.15 1.292,0.0323,0.0040,90,0.0040,Known errors,1.03,0,-1,-1 20240724_0547-1,60140.22 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:14 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org