IOTA/IOTA-ES occultation update for (11683) 1998 FO11 / TYC 5636-00641-1 event on 2024 Feb 10, 08:28 UT Visible from Summary ------- On 2024 Feb 10 UT, the 12.8666581457037 km diameter asteroid (11683) 1998 FO11 will occult a 11.1 mag star in the constellation Ophiuchus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.61 mag to 18.67 mag (the magnitude of the asteroid) for at most 0.450 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: 98 * date and approx. time of event: 2024 Feb 10, 08:27 - 2024 Feb 10, 08:30 * geocentric midpoint of event [JD]: 2460350.85331921 * magnitude of target star: 11.06 * magnitude drop [mag]: 7.61 * estimated maximum duration [s]: 0.450 * Moon: 0 % sunlit, 78° distance * Sun: 71° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 31 * 1 sigma uncertainty interval [path widths]: +/- 0.35 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.012, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.012", 0.001", 94°) * approx speed of asteroid's shadow [km/s]: 28.7345 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5636-00641-1 by 11683 1998 FO11 on 2024 Feb 10 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 - 84 0 0 58 31 57 8 27 16.0 0 115 -37 58 22 30 58 41 29 58 15 53 58 48 13 .... - 83 0 0 58 17 25 8 27 16.0 1 116 -37 58 7 59 58 26 55 58 1 23 58 33 37 -1.21 - 82 0 0 58 3 4 8 27 16.1 1 117 -37 57 53 40 58 12 32 57 47 6 58 19 13 -1.61 - 81 0 0 57 48 55 8 27 16.3 2 118 -36 57 39 33 57 58 21 57 33 0 58 5 1 -1.78 - 80 0 0 57 34 59 8 27 16.5 3 119 -36 57 25 39 57 44 23 57 19 7 57 51 1 -1.88 - 79 0 0 57 21 16 8 27 16.8 3 120 -36 57 11 57 57 30 38 57 5 27 57 37 15 -1.94 - 78 0 0 57 7 46 8 27 17.1 4 121 -35 56 58 30 57 17 6 56 52 1 57 23 42 -1.99 - 77 0 0 56 54 31 8 27 17.5 4 121 -35 56 45 16 57 3 49 56 38 48 57 10 24 -2.02 - 76 0 0 56 41 30 8 27 18.0 5 122 -35 56 32 17 56 50 46 56 25 50 56 57 19 -2.04 - 75 0 0 56 28 43 8 27 18.5 6 123 -34 56 19 32 56 37 58 56 13 7 56 44 30 -2.06 - 74 0 0 56 16 12 8 27 19.0 6 124 -34 56 7 2 56 25 25 56 0 38 56 31 56 -2.08 - 73 0 0 56 3 56 8 27 19.7 7 125 -34 55 54 49 56 13 8 55 48 26 56 19 37 -2.09 - 72 0 0 55 51 57 8 27 20.3 7 126 -33 55 42 51 56 1 6 55 36 29 56 7 35 -2.10 - 71 0 0 55 40 14 8 27 21.1 8 126 -33 55 31 9 55 49 21 55 24 48 55 55 49 -2.11 - 70 0 0 55 28 47 8 27 21.9 8 127 -32 55 19 44 55 37 53 55 13 24 55 44 19 -2.12 - 69 0 0 55 17 38 8 27 22.7 9 128 -32 55 8 36 55 26 42 55 2 18 55 33 7 -2.13 - 68 0 0 55 6 45 8 27 23.6 10 129 -31 54 57 45 55 15 49 54 51 28 55 22 13 -2.14 - 67 0 0 54 56 11 8 27 24.6 10 130 -31 54 47 13 55 5 13 54 40 56 55 11 36 -2.14 - 66 0 0 54 45 55 8 27 25.6 11 131 -30 54 36 58 54 54 55 54 30 42 55 1 17 -2.15 - 65 0 0 54 35 57 8 27 26.7 11 132 -30 54 27 1 54 44 56 54 20 47 54 51 17 -2.15 - 64 0 0 54 26 18 8 27 27.9 12 133 -29 54 17 24 54 35 16 54 11 10 54 41 35 -2.16 - 63 0 0 54 16 58 8 27 29.0 12 133 -29 54 8 5 54 25 54 54 1 52 54 32 13 -2.16 - 62 0 0 54 7 57 8 27 30.3 13 134 -28 53 59 5 54 16 52 53 52 53 54 23 10 -2.16 - 61 0 0 53 59 16 8 27 31.6 13 135 -28 53 50 25 54 8 9 53 44 14 54 14 26 -2.17 - 60 0 0 53 50 54 8 27 32.9 14 136 -27 53 42 4 53 59 46 53 35 54 54 6 3 -2.17 - 59 0 0 53 42 52 8 27 34.3 14 137 -27 53 34 3 53 51 44 53 27 54 53 57 59 -2.17 - 58 0 0 53 35 10 8 27 35.8 15 138 -26 53 26 23 53 44 1 53 20 14 53 50 16 -2.18 - 57 0 0 53 27 49 8 27 37.3 15 139 -26 53 19 3 53 36 39 53 12 55 53 42 53 -2.18 - 56 0 0 53 20 49 8 27 38.9 16 140 -25 53 12 4 53 29 38 53 5 56 53 35 51 -2.18 - 55 0 0 53 14 10 8 27 40.5 16 141 -24 53 5 25 53 22 57 52 59 18 53 29 10 -2.19 - 54 0 0 53 7 51 8 27 42.1 17 142 -24 52 59 8 53 16 38 52 53 1 53 22 50 -2.19 - 53 0 0 53 1 54 8 27 43.8 17 142 -23 52 53 11 53 10 40 52 47 6 53 16 51 -2.19 - 52 0 0 52 56 18 8 27 45.5 18 143 -23 52 47 36 53 5 3 52 41 31 53 11 14 -2.19 - 51 0 0 52 51 4 8 27 47.3 18 144 -22 52 42 23 52 59 49 52 36 18 53 5 59 -2.19 - 50 0 0 52 46 12 8 27 49.1 18 145 -21 52 37 31 52 54 56 52 31 27 53 1 6 -2.20 - 49 0 0 52 41 42 8 27 51.0 19 146 -21 52 33 2 52 50 25 52 26 58 52 56 34 -2.20 - 48 0 0 52 37 33 8 27 52.9 19 147 -20 52 28 54 52 46 16 52 22 50 52 52 25 -2.20 - 47 0 0 52 33 47 8 27 54.9 20 148 -20 52 25 8 52 42 29 52 19 5 52 48 38 -2.20 - 46 0 0 52 30 23 8 27 56.8 20 149 -19 52 21 44 52 39 5 52 15 42 52 45 13 -2.20 - 45 0 0 52 27 21 8 27 58.8 20 150 -18 52 18 43 52 36 3 52 12 41 52 42 11 -2.20 - 44 0 0 52 24 42 8 28 0.9 21 151 -18 52 16 4 52 33 23 52 10 2 52 39 31 -2.21 - 43 0 0 52 22 25 8 28 3.0 21 152 -17 52 13 48 52 31 6 52 7 46 52 37 13 -2.21 - 42 0 0 52 20 31 8 28 5.1 21 153 -17 52 11 54 52 29 12 52 5 52 52 35 19 -2.21 - 41 0 0 52 19 0 8 28 7.2 22 154 -16 52 10 23 52 27 40 52 4 21 52 33 47 -2.21 - 40 0 0 52 17 51 8 28 9.4 22 155 -15 52 9 14 52 26 31 52 3 12 52 32 38 -2.21 - 39 0 0 52 17 5 8 28 11.6 22 156 -15 52 8 28 52 25 45 52 2 26 52 31 52 -2.21 - 38 0 0 52 16 42 8 28 13.8 22 157 -14 52 8 5 52 25 21 52 2 3 52 31 28 -2.21 - 37 0 0 52 16 41 8 28 16.1 23 158 -13 52 8 4 52 25 21 52 2 3 52 31 28 -2.22 - 36 0 0 52 17 3 8 28 18.4 23 159 -13 52 8 26 52 25 43 52 2 25 52 31 50 -2.22 - 35 0 0 52 17 48 8 28 20.6 23 160 -12 52 9 11 52 26 28 52 3 10 52 32 35 -2.22 - 34 0 0 52 18 56 8 28 22.9 23 161 -12 52 10 19 52 27 36 52 4 17 52 33 44 -2.22 - 33 0 0 52 20 27 8 28 25.3 23 162 -11 52 11 49 52 29 7 52 5 47 52 35 14 -2.22 - 32 0 0 52 22 20 8 28 27.6 24 164 -10 52 13 42 52 31 1 52 7 40 52 37 8 -2.22 - 31 0 0 52 24 36 8 28 30.0 24 165 -10 52 15 58 52 33 17 52 9 55 52 39 25 -2.22 - 30 0 0 52 27 14 8 28 32.3 24 166 -9 52 18 36 52 35 56 52 12 33 52 42 4 -2.22 - 29 0 0 52 30 15 8 28 34.7 24 167 -9 52 21 36 52 38 57 52 15 34 52 45 6 -2.22 - 28 0 0 52 33 39 8 28 37.1 24 168 -8 52 25 0 52 42 21 52 18 56 52 48 30 -2.22 - 27 0 0 52 37 25 8 28 39.4 24 169 -7 52 28 45 52 46 8 52 22 41 52 52 17 -2.22 - 26 0 0 52 41 33 8 28 41.8 24 170 -7 52 32 52 52 50 16 52 26 48 52 56 26 -2.23 - 25 0 0 52 46 3 8 28 44.2 24 171 -6 52 37 22 52 54 47 52 31 18 53 0 58 -2.23 - 24 0 0 52 50 56 8 28 46.6 24 172 -6 52 42 14 52 59 41 52 36 9 53 5 51 -2.23 - 23 0 0 52 56 10 8 28 49.0 24 173 -5 52 47 27 53 4 56 52 41 22 53 11 7 -2.23 - 22 0 0 53 1 46 8 28 51.4 24 174 -5 52 53 3 53 10 32 52 46 57 53 16 44 -2.23 - 21 0 0 53 7 44 8 28 53.8 24 175 -4 52 59 0 53 16 31 52 52 53 53 22 43 -2.23 - 20 0 0 53 14 3 8 28 56.1 24 176 -4 53 5 18 53 22 51 52 59 10 53 29 4 -2.23 - 19 0 0 53 20 43 8 28 58.5 24 178 -3 53 11 57 53 29 32 53 5 49 53 35 46 -2.23 - 18 0 0 53 27 45 8 29 0.9 24 179 -2 53 18 58 53 36 35 53 12 49 53 42 49 -2.23 - 17 0 0 53 35 7 8 29 3.2 24 180 -2 53 26 19 53 43 58 53 20 10 53 50 13 -2.23 - 16 0 0 53 42 50 8 29 5.5 24 181 -1 53 34 1 53 51 42 53 27 51 53 57 58 -2.23 - 15 0 0 53 50 54 8 29 7.9 23 182 -1 53 42 3 53 59 47 53 35 53 54 6 4 -2.23 - 14 0 0 53 59 17 8 29 10.2 23 183 0 53 50 26 54 8 12 53 44 14 54 14 30 -2.23 - 13 0 0 54 8 1 8 29 12.4 23 184 0 53 59 9 54 16 57 53 52 56 54 23 15 -2.23 - 12 0 0 54 17 5 8 29 14.7 23 185 0 54 8 11 54 26 2 54 1 57 54 32 21 -2.23 - 11 0 0 54 26 28 8 29 16.9 23 186 1 54 17 32 54 35 26 54 11 18 54 41 46 -2.23 - 10 0 0 54 36 10 8 29 19.1 22 187 1 54 27 13 54 45 9 54 20 58 54 51 31 -2.23 - 9 0 0 54 46 11 8 29 21.3 22 188 2 54 37 13 54 55 12 54 30 57 55 1 34 -2.24 - 8 0 0 54 56 30 8 29 23.5 22 189 2 54 47 31 55 5 33 54 41 14 55 11 57 -2.24 - 7 0 0 55 7 8 8 29 25.6 22 190 3 54 58 8 55 16 13 54 51 49 55 22 37 -2.24 - 6 0 0 55 18 4 8 29 27.7 21 191 3 55 9 2 55 27 10 55 2 43 55 33 36 -2.24 - 5 0 0 55 29 18 8 29 29.8 21 192 3 55 20 14 55 38 25 55 13 54 55 44 52 -2.24 - 4 0 0 55 40 49 8 29 31.8 21 193 4 55 31 44 55 49 58 55 25 22 55 56 26 -2.24 - 3 0 0 55 52 37 8 29 33.8 20 194 4 55 43 30 56 1 48 55 37 7 56 8 17 -2.24 - 2 0 0 56 4 42 8 29 35.8 20 195 5 55 55 33 56 13 54 55 49 9 56 20 24 -2.24 - 1 0 0 56 17 3 8 29 37.7 20 197 5 56 7 52 56 26 17 56 1 27 56 32 48 -2.24 0 0 0 56 29 39 8 29 39.6 19 198 5 56 20 27 56 38 55 56 14 1 56 45 28 -2.24 1 0 0 56 42 31 8 29 41.5 19 199 6 56 33 17 56 51 49 56 26 50 56 58 23 -2.24 2 0 0 56 55 38 8 29 43.3 19 200 6 56 46 22 57 4 57 56 39 54 57 11 33 -2.24 3 0 0 57 8 59 8 29 45.1 18 201 6 56 59 42 57 18 21 56 53 12 57 24 58 -2.24 4 0 0 57 22 35 8 29 46.8 18 201 6 57 13 16 57 31 58 57 6 44 57 38 36 -2.24 5 0 0 57 36 24 8 29 48.5 17 202 7 57 27 3 57 45 50 57 20 31 57 52 29 -2.24 6 0 0 57 50 27 8 29 50.1 17 203 7 57 41 4 57 59 54 57 34 30 58 6 35 -2.24 7 0 0 58 4 42 8 29 51.7 17 204 7 57 55 17 58 14 11 57 48 42 58 20 54 -2.24 8 0 0 58 19 10 8 29 53.3 16 205 7 58 9 43 58 28 41 58 3 6 58 35 25 -2.24 9 0 0 58 33 50 8 29 54.8 16 206 8 58 24 20 58 43 23 58 17 43 58 50 8 -2.24 10 0 0 58 48 40 8 29 56.3 15 207 8 58 39 9 58 58 16 58 32 30 59 5 2 -2.24 11 0 0 59 3 42 8 29 57.7 15 208 8 58 54 9 59 13 19 58 47 28 59 20 7 -2.25 12 0 0 59 18 54 8 29 59.0 14 209 8 59 9 19 59 28 34 59 2 37 59 35 23 -2.25 13 0 0 59 34 16 8 30 0.3 14 210 8 59 24 39 59 43 58 59 17 56 59 50 49 -2.25 14 0 0 59 49 47 8 30 1.6 13 211 8 59 40 8 59 59 31 59 33 23 60 6 23 -2.25 15 0 0 60 5 27 8 30 2.8 13 212 9 59 55 46 60 15 13 59 49 0 60 22 7 -2.25 16 0 0 60 21 15 8 30 4.0 12 213 9 60 11 32 60 31 3 60 4 45 60 37 58 -2.25 17 0 0 60 37 11 8 30 5.1 12 214 9 60 27 26 60 47 1 60 20 37 60 53 58 -2.25 18 0 0 60 53 14 8 30 6.2 11 215 9 60 43 27 61 3 6 60 36 37 61 10 4 -2.25 19 0 0 61 9 24 8 30 7.2 11 216 9 60 59 34 61 19 17 60 52 43 61 26 17 -2.25 20 0 0 61 25 39 8 30 8.1 10 217 9 61 15 48 61 35 35 61 8 55 61 42 36 -2.25 21 0 0 61 42 0 8 30 9.0 10 218 9 61 32 6 61 51 58 61 25 12 61 59 0 -2.26 22 0 0 61 58 25 8 30 9.9 9 219 9 61 48 30 62 8 25 61 41 34 62 15 30 -2.26 23 0 0 62 14 55 8 30 10.7 9 219 9 62 4 58 62 24 57 61 58 1 62 32 3 -2.26 24 0 0 62 31 29 8 30 11.5 8 220 9 62 21 30 62 41 33 62 14 31 62 48 40 -2.26 25 0 0 62 48 6 8 30 12.2 8 221 9 62 38 4 62 58 11 62 31 5 63 5 20 -2.26 26 0 0 63 4 45 8 30 12.8 7 222 9 62 54 42 63 14 52 62 47 41 63 22 2 -2.27 27 0 0 63 21 26 8 30 13.5 7 223 9 63 11 21 63 31 36 63 4 19 63 38 47 -2.27 28 0 0 63 38 9 8 30 14.0 6 224 9 63 28 2 63 48 20 63 20 58 63 55 33 -2.27 29 0 0 63 54 52 8 30 14.5 6 225 9 63 44 44 64 5 5 63 37 39 64 12 19 -2.28 30 0 0 64 11 36 8 30 15.0 5 226 9 64 1 25 64 21 51 63 54 19 64 29 6 -2.28 31 0 0 64 28 19 8 30 15.4 5 227 9 64 18 7 64 38 36 64 11 0 64 45 52 -2.28 32 0 0 64 45 2 8 30 15.8 4 228 9 64 34 48 64 55 20 64 27 40 65 2 38 -2.29 33 0 0 65 1 43 8 30 16.1 4 229 9 64 51 28 65 12 3 64 44 18 65 19 21 -2.30 34 0 0 65 18 22 8 30 16.4 3 229 9 65 8 5 65 28 43 65 0 55 65 36 3 -2.31 35 0 0 65 34 58 8 30 16.6 3 230 9 65 24 40 65 45 21 65 17 29 65 52 42 -2.33 36 0 0 65 51 32 8 30 16.8 2 231 8 65 41 12 66 1 56 65 34 0 66 9 18 -2.34 37 0 0 66 8 2 8 30 17.0 2 232 8 65 57 41 66 18 27 65 50 28 66 25 50 -2.38 38 0 0 66 24 27 8 30 17.1 1 233 8 66 14 5 66 34 54 66 6 51 66 42 18 -2.43 39 0 0 66 40 48 8 30 17.2 1 234 8 66 30 25 66 51 17 66 23 10 66 58 41 -2.56 40 0 0 66 57 4 8 30 17.2 0 235 8 66 46 40 67 7 34 66 39 24 67 14 59 -3.06 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 13.2 Data for the target star ------------------------ * name: TYC 5636-00641-1 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 40 30.3931 DE: -12 44 58.908 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 40 30.3932 DE: -12 44 58.908 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.1 * B mag [mag]: 11.9 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (11683) 1998 FO11 asteroid class: approx. diameter [km]: 13 approx. diameter ["]: 0.007 distance from Earth [AU]: 2.65200 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#44 date of fit: 2023 Apr 25 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): 0.012", 0.001", 94.448° remarks: * orbital elements for (11683)1998 FO11 : Mean anomaly = 28.0241005023 deg Arg. of pericenter = 18.9914604669 deg Long. of node = 179.0537194646 deg Inclination = 12.9871517218 deg Eccentricity = 0.0509082841 Semimajor axis = 2.6208299213 AU Perihelion dist = 2.4874079669 AU Mag: H = 13.50, G = 0.15 Epoch of elements : MJD 60350.35331921 TDT (2024 Feb 10.3533) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#442023Apr25,0.45,2024,2,10,8.479661,-0.076601,0.906719,16.160498,1.370940,-0.005417,0.001061,-0.000001,0.000000 -16.6599,-12.7977,56.35,-14.47,False TYC 5636-00641-1,16.67510917,-12.7496966,11.94,11.06,10.58,0.1,0,,16.69738688,-12.7977193,7.61,7.63,0,0,0 11683,1998 FO11,18.67,13.059,2.6520,0,0,3.664,4.55,,1.0,0 0,27.9420,2024,2,10,18.9915,179.0537,12.9872,0.05091,2.62083,2.48741,13.50,5.0,0.15 1.351,0.0123,0.0013,94,0.0024,Known errors,1.27,0,-1,-1 20240210_0641-1,60138.16 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 13, 03:54 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org