IOTA/IOTA-ES occultation update for (29665) 1998 WD24 / UCAC4 302-219957 event on 2024 Oct 05, 19:57 UT Visible from Summary ------- On 2024 Oct 05 UT, the 21.372 km diameter asteroid (29665) 1998 WD24 will occult a 11.9 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.24 mag to 18.11 mag (the magnitude of the asteroid) for at most 0.880 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 Oct 05, 19:54 - 2024 Oct 05, 20:00 * geocentric midpoint of event [JD]: 2460589.33130495 * magnitude of target star: 11.87 * magnitude drop [mag]: 6.24 * estimated maximum duration [s]: 0.880 * Moon: 8 % sunlit, 49° distance * Sun: 82° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 32 * 1 sigma uncertainty interval [path widths]: +/- 0.35 * 1 sigma uncertainty interval [seconds]: +/- 1.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.019, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.004", 80°) * approx speed of asteroid's shadow [km/s]: 24.3866 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 302-219957 by 29665 1998 WD24 on 2024 Oct 5 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 -107 0 0 31 25 6 19 54 13.2 1 126 51 31 14 25 31 35 50 31 7 3 31 43 17 .... -106 0 0 30 49 16 19 54 13.4 2 126 51 30 38 40 30 59 55 30 31 22 31 7 19 -0.68 -105 0 0 30 14 7 19 54 13.7 3 127 51 30 3 36 30 24 41 29 56 21 30 32 1 -0.84 -104 0 0 29 39 40 19 54 14.1 4 127 51 29 29 13 29 50 9 29 22 2 29 57 25 -0.92 -103 0 0 29 5 54 19 54 14.6 5 128 51 28 55 32 29 16 18 28 48 24 29 23 31 -0.97 -102 0 0 28 32 52 19 54 15.3 6 128 51 28 22 34 28 43 11 28 15 29 28 50 21 -1.00 -101 0 0 28 0 33 19 54 16.1 7 129 51 27 50 20 28 10 48 27 43 18 28 17 54 -1.02 -100 0 0 27 28 58 19 54 17.0 8 129 51 27 18 50 27 39 9 27 11 50 27 46 12 -1.03 - 99 0 0 26 58 8 19 54 18.1 9 130 51 26 48 4 27 8 14 26 41 8 27 15 15 -1.05 - 98 0 0 26 28 3 19 54 19.3 10 130 51 26 18 3 26 38 5 26 11 10 26 45 3 -1.06 - 97 0 0 25 58 44 19 54 20.6 11 131 51 25 48 48 26 8 42 25 41 57 26 15 37 -1.07 - 96 0 0 25 30 11 19 54 22.0 12 131 51 25 20 19 25 40 5 25 13 31 25 46 57 -1.07 - 95 0 0 25 2 24 19 54 23.5 13 132 50 24 52 36 25 12 15 24 45 51 25 19 4 -1.08 - 94 0 0 24 35 25 19 54 25.2 14 132 50 24 25 40 24 45 12 24 18 57 24 51 58 -1.08 - 93 0 0 24 9 12 19 54 27.0 15 133 50 23 59 31 24 18 56 23 52 51 24 25 40 -1.09 - 92 0 0 23 43 47 19 54 28.8 16 133 49 23 34 10 23 53 27 23 27 31 24 0 9 -1.09 - 91 0 0 23 19 10 19 54 30.8 17 134 49 23 9 36 23 28 47 23 3 0 23 35 26 -1.10 - 90 0 0 22 55 21 19 54 32.9 18 134 48 22 45 50 23 4 54 22 39 16 23 11 32 -1.10 - 89 0 0 22 32 20 19 54 35.1 19 135 48 22 22 52 22 41 50 22 16 20 22 48 26 -1.10 - 88 0 0 22 10 8 19 54 37.4 20 135 47 22 0 42 22 19 35 21 54 12 22 26 8 -1.11 - 87 0 0 21 48 44 19 54 39.8 21 136 47 21 39 21 21 58 9 21 32 53 22 4 40 -1.11 - 86 0 0 21 28 9 19 54 42.3 22 136 46 21 18 49 21 37 31 21 12 23 21 44 1 -1.11 - 85 0 0 21 8 23 19 54 44.9 22 137 46 20 59 6 21 17 43 20 52 42 21 24 10 -1.11 - 84 0 0 20 49 27 19 54 47.6 23 138 45 20 40 11 20 58 43 20 33 49 21 5 9 -1.11 - 83 0 0 20 31 19 19 54 50.3 24 138 44 20 22 6 20 40 33 20 15 45 20 46 58 -1.12 - 82 0 0 20 14 0 19 54 53.2 25 139 44 20 4 50 20 23 13 19 58 30 20 29 35 -1.12 - 81 0 0 19 57 31 19 54 56.1 26 139 43 19 48 23 20 6 41 19 42 5 20 13 3 -1.12 - 80 0 0 19 41 52 19 54 59.2 27 140 42 19 32 45 19 51 0 19 26 29 19 57 20 -1.12 - 79 0 0 19 27 1 19 55 2.3 27 141 41 19 17 57 19 36 8 19 11 42 19 42 26 -1.12 - 78 0 0 19 13 1 19 55 5.5 28 141 41 19 3 58 19 22 5 18 57 44 19 28 23 -1.12 - 77 0 0 18 59 50 19 55 8.7 29 142 40 18 50 49 19 8 53 18 44 36 19 15 9 -1.13 - 76 0 0 18 47 28 19 55 12.1 30 143 39 18 38 29 18 56 30 18 32 17 19 2 45 -1.13 - 75 0 0 18 35 57 19 55 15.5 30 143 38 18 26 58 18 44 56 18 20 48 18 51 10 -1.13 - 74 0 0 18 25 14 19 55 19.0 31 144 37 18 16 18 18 34 13 18 10 8 18 40 26 -1.13 - 73 0 0 18 15 22 19 55 22.5 32 145 37 18 6 27 18 24 19 18 0 17 18 30 31 -1.13 - 72 0 0 18 6 20 19 55 26.1 33 145 36 17 57 25 18 15 16 17 51 17 18 21 27 -1.13 - 71 0 0 17 58 7 19 55 29.8 33 146 35 17 49 13 18 7 2 17 43 6 18 13 12 -1.13 - 70 0 0 17 50 44 19 55 33.5 34 147 34 17 41 51 17 59 38 17 35 44 18 5 48 -1.13 - 69 0 0 17 44 11 19 55 37.3 34 148 33 17 35 19 17 53 4 17 29 12 17 59 13 -1.14 - 68 0 0 17 38 27 19 55 41.2 35 149 32 17 29 36 17 47 20 17 23 30 17 53 29 -1.14 - 67 0 0 17 33 33 19 55 45.1 36 150 31 17 24 43 17 42 26 17 18 37 17 48 34 -1.14 - 66 0 0 17 29 30 19 55 49.1 36 150 30 17 20 40 17 38 21 17 14 34 17 44 29 -1.14 - 65 0 0 17 26 16 19 55 53.1 37 151 29 17 17 26 17 35 7 17 11 21 17 41 15 -1.14 - 64 0 0 17 23 52 19 55 57.1 37 152 29 17 15 2 17 32 43 17 8 57 17 38 50 -1.14 - 63 0 0 17 22 17 19 56 1.2 38 153 28 17 13 28 17 31 8 17 7 23 17 37 16 -1.14 - 62 0 0 17 21 33 19 56 5.4 38 154 27 17 12 44 17 30 24 17 6 39 17 36 32 -1.14 - 61 0 0 17 21 39 19 56 9.5 38 155 26 17 12 50 17 30 30 17 6 45 17 36 38 -1.14 - 60 0 0 17 22 35 19 56 13.8 39 156 25 17 13 46 17 31 26 17 7 41 17 37 34 -1.14 - 59 0 0 17 24 21 19 56 18.0 39 157 24 17 15 31 17 33 12 17 9 26 17 39 20 -1.14 - 58 0 0 17 26 56 19 56 22.3 40 158 23 17 18 6 17 35 48 17 12 1 17 41 56 -1.14 - 57 0 0 17 30 22 19 56 26.6 40 159 22 17 21 32 17 39 14 17 15 26 17 45 22 -1.14 - 56 0 0 17 34 38 19 56 31.0 40 161 21 17 25 47 17 43 30 17 19 41 17 49 39 -1.14 - 55 0 0 17 39 44 19 56 35.3 40 162 20 17 30 52 17 48 37 17 24 46 17 54 46 -1.14 - 54 0 0 17 45 40 19 56 39.7 41 163 19 17 36 47 17 54 34 17 30 40 18 0 44 -1.15 - 53 0 0 17 52 26 19 56 44.1 41 164 18 17 43 33 18 1 21 17 37 25 18 7 31 -1.15 - 52 0 0 18 0 2 19 56 48.6 41 165 17 17 51 8 18 8 58 17 45 0 18 15 10 -1.15 - 51 0 0 18 8 29 19 56 53.0 41 166 16 17 59 34 18 17 26 17 53 24 18 23 38 -1.15 - 50 0 0 18 17 46 19 56 57.5 41 167 15 18 8 49 18 26 44 18 2 39 18 32 57 -1.15 - 49 0 0 18 27 53 19 57 2.0 41 169 14 18 18 55 18 36 53 18 12 44 18 43 7 -1.15 - 48 0 0 18 38 51 19 57 6.5 41 170 13 18 29 51 18 47 52 18 23 39 18 54 7 -1.15 - 47 0 0 18 50 38 19 57 11.0 41 171 12 18 41 37 18 59 41 18 35 25 19 5 57 -1.15 - 46 0 0 19 3 17 19 57 15.5 41 172 11 18 54 14 19 12 21 18 48 0 19 18 38 -1.15 - 45 0 0 19 16 45 19 57 20.0 41 173 10 19 7 41 19 25 51 19 1 26 19 32 10 -1.15 - 44 0 0 19 31 4 19 57 24.4 41 174 9 19 21 58 19 40 12 19 15 41 19 46 32 -1.15 - 43 0 0 19 46 13 19 57 28.9 41 176 8 19 37 5 19 55 23 19 30 47 20 1 45 -1.15 - 42 0 0 20 2 13 19 57 33.4 40 177 7 19 53 3 20 11 25 19 46 43 20 17 48 -1.15 - 41 0 0 20 19 3 19 57 37.9 40 178 6 20 9 50 20 28 17 20 3 29 20 34 42 -1.15 - 40 0 0 20 36 43 19 57 42.4 40 179 5 20 27 28 20 46 0 20 21 6 20 52 26 -1.15 - 39 0 0 20 55 14 19 57 46.8 40 180 4 20 45 56 21 4 33 20 39 32 21 11 0 -1.15 - 38 0 0 21 14 34 19 57 51.2 39 181 3 21 5 14 21 23 56 20 58 48 21 30 25 -1.15 - 37 0 0 21 34 45 19 57 55.6 39 183 2 21 25 22 21 44 9 21 18 54 21 50 41 -1.15 - 36 0 0 21 55 46 19 58 0.0 38 184 1 21 46 20 22 5 13 21 39 50 22 11 46 -1.15 - 35 0 0 22 17 36 19 58 4.4 38 185 0 22 8 8 22 27 7 22 1 36 22 33 42 -1.15 - 34 0 0 22 40 17 19 58 8.7 38 186 -1 22 30 45 22 49 50 22 24 11 22 56 28 -1.15 - 33 0 0 23 3 47 19 58 12.9 37 187 -2 22 54 12 23 13 23 22 47 36 23 20 3 -1.15 - 32 0 0 23 28 6 19 58 17.2 37 188 -3 23 18 28 23 37 46 23 11 50 23 44 28 -1.15 - 31 0 0 23 53 15 19 58 21.4 36 189 -3 23 43 33 24 2 58 23 36 53 24 9 43 -1.15 - 30 0 0 24 19 13 19 58 25.5 35 190 -4 24 9 28 24 29 0 24 2 45 24 35 47 -1.15 - 29 0 0 24 45 59 19 58 29.6 35 191 -5 24 36 11 24 55 50 24 29 25 25 2 40 -1.15 - 28 0 0 25 13 34 19 58 33.7 34 192 -6 25 3 42 25 23 29 24 56 54 25 30 21 -1.15 - 27 0 0 25 41 57 19 58 37.7 34 193 -7 25 32 1 25 51 56 25 25 10 25 58 51 -1.15 - 26 0 0 26 11 8 19 58 41.6 33 194 -8 26 1 8 26 21 11 25 54 14 26 28 9 -1.15 - 25 0 0 26 41 7 19 58 45.5 32 195 -9 26 31 2 26 51 14 26 24 5 26 58 15 -1.15 - 24 0 0 27 11 52 19 58 49.3 31 196 -10 27 1 43 27 22 3 26 54 43 27 29 7 -1.15 - 23 0 0 27 43 24 19 58 53.0 31 197 -11 27 33 10 27 53 39 27 26 8 28 0 47 -1.15 - 22 0 0 28 15 41 19 58 56.7 30 198 -12 28 5 23 28 26 2 27 58 18 28 33 12 -1.15 - 21 0 0 28 48 44 19 59 0.2 29 198 -13 28 38 21 28 59 9 28 31 12 29 6 23 -1.15 - 20 0 0 29 22 32 19 59 3.7 28 199 -14 29 12 4 29 33 2 29 4 52 29 40 19 -1.15 - 19 0 0 29 57 3 19 59 7.2 27 200 -14 29 46 31 30 7 38 29 39 15 30 14 59 -1.15 - 18 0 0 30 32 18 19 59 10.5 27 201 -15 30 21 40 30 42 58 30 14 21 30 50 22 -1.15 - 17 0 0 31 8 15 19 59 13.7 26 202 -16 30 57 32 31 19 0 30 50 10 31 26 28 -1.15 - 16 0 0 31 44 54 19 59 16.8 25 203 -17 31 34 6 31 55 45 31 26 39 32 3 16 -1.15 - 15 0 0 32 22 13 19 59 19.8 24 203 -18 32 11 20 32 33 10 32 3 50 32 40 45 -1.15 - 14 0 0 33 0 12 19 59 22.8 23 204 -19 32 49 13 33 11 14 32 41 39 33 18 54 -1.15 - 13 0 0 33 38 50 19 59 25.6 22 205 -19 33 27 45 33 49 58 33 20 7 33 57 41 -1.15 - 12 0 0 34 18 5 19 59 28.3 21 206 -20 34 6 54 34 29 18 33 59 13 34 37 6 -1.15 - 11 0 0 34 57 56 19 59 30.9 20 206 -21 34 46 39 35 9 15 34 38 54 35 17 7 -1.15 - 10 0 0 35 38 22 19 59 33.4 19 207 -22 35 27 0 35 49 48 35 19 10 35 57 44 -1.15 - 9 0 0 36 19 21 19 59 35.7 18 208 -22 36 7 53 36 30 53 35 59 59 36 38 53 -1.15 - 8 0 0 37 0 53 19 59 38.0 17 209 -23 36 49 18 37 12 31 36 41 20 37 20 36 -1.15 - 7 0 0 37 42 55 19 59 40.1 16 209 -24 37 31 14 37 54 40 37 23 12 38 2 49 -1.15 - 6 0 0 38 25 26 19 59 42.1 15 210 -24 38 13 39 38 37 17 38 5 32 38 45 31 -1.16 - 5 0 0 39 8 25 19 59 43.9 14 211 -25 38 56 31 39 20 23 38 48 20 39 28 41 -1.16 - 4 0 0 39 51 49 19 59 45.6 13 211 -25 39 39 49 40 3 53 39 31 33 40 12 16 -1.16 - 3 0 0 40 35 37 19 59 47.2 12 212 -26 40 23 30 40 47 48 40 15 10 40 56 15 -1.16 - 2 0 0 41 19 46 19 59 48.7 11 213 -26 41 7 33 41 32 4 40 59 8 41 40 36 -1.16 - 1 0 0 42 4 16 19 59 50.0 10 214 -27 41 51 55 42 16 40 41 43 26 42 25 17 -1.17 0 0 0 42 49 2 19 59 51.2 9 214 -27 42 36 36 43 1 34 42 28 2 43 10 16 -1.17 1 0 0 43 34 5 19 59 52.3 8 215 -28 43 21 32 43 46 43 43 12 53 43 55 30 -1.17 2 0 0 44 19 21 19 59 53.2 7 216 -28 44 6 41 44 32 6 43 57 58 44 40 57 -1.18 3 0 0 45 4 48 19 59 54.0 6 216 -28 44 52 1 45 17 39 44 43 13 45 26 35 -1.19 4 0 0 45 50 23 19 59 54.7 5 217 -29 45 37 30 46 3 22 45 28 38 46 12 23 -1.20 5 0 0 46 36 5 19 59 55.2 4 218 -29 46 23 5 46 49 10 46 14 9 46 58 16 -1.21 6 0 0 47 21 51 19 59 55.6 3 219 -29 47 8 44 47 35 2 46 59 43 47 44 13 -1.24 7 0 0 48 7 37 19 59 55.9 2 219 -30 47 54 24 48 20 56 47 45 19 48 30 11 -1.29 8 0 0 48 53 23 19 59 56.0 1 220 -30 48 40 3 49 6 48 48 30 54 49 16 7 -1.47 9 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. 49 16 25 .. .. .. .... Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 302-219957 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 19 06.1984 DE: -29 37 07.858 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 19 06.1984 DE: -29 37 07.858 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.9 * B mag [mag]: 12.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (29665) 1998 WD24 asteroid class: approx. diameter [km]: 21 approx. diameter ["]: 0.012 distance from Earth [AU]: 2.51230 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#53 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): 0.019", 0.004", 80.454° remarks: * orbital elements for (29665)1998 WD24 : Mean anomaly = 49.2037955726 deg Arg. of pericenter = 239.1243067673 deg Long. of node = 346.8881702918 deg Inclination = 7.9869947092 deg Eccentricity = 0.2107376899 Semimajor axis = 2.8687765145 AU Perihelion dist = 2.2642171789 AU Mag: H = 12.98, G = 0.15 Epoch of elements : MJD 60588.83130474 TDT (2024 Oct 05.8313) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr25,0.88,2024,10,5,19.951319,-0.153245,0.737551,13.477559,2.795685,0.005629,0.000110,0.000000,0.000000 -39.0817,-29.6102,-122.23,-5.16,False UCAC4 302-219957,18.31838849,-29.6188495,12.53,11.87,11.51,0.0,0,,18.34462204,-29.6102157,6.24,6.15,0,0,1 29665,1998 WD24,18.11,21.372,2.5123,0,0,3.618,9.79,,1.6,0 0,49.0352,2024,10,5,239.1243,346.8882,7.9870,0.21074,2.86878,2.26422,12.98,5.0,0.15 1.346,0.0190,0.0040,80,0.0041,Known errors,0.54,0,-1,-1 20241005_219957,60140.61 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:42 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org