IOTA/IOTA-ES occultation update for (29665) 1998 WD24 / UCAC4 302-219849 event on 2024 Oct 05, 19:06 UT Visible from Summary ------- On 2024 Oct 05 UT, the 21.2791322216789 km diameter asteroid (29665) 1998 WD24 will occult a 11.8 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 6.34 mag to 18.11 mag (the magnitude of the asteroid) for at most 0.910 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 Oct 05, 19:03 - 2024 Oct 05, 19:10 * geocentric midpoint of event [JD]: 2460589.29645958 * magnitude of target star: 11.77 * magnitude drop [mag]: 6.34 * estimated maximum duration [s]: 0.910 * 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]: +/- 0.33 * 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]: 24.3751 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 302-219849 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 - 97 0 0 28 52 31 19 3 51.2 0 125 54 28 42 13 29 2 52 28 35 19 29 9 50 .... - 96 0 0 28 16 53 19 3 51.3 2 125 54 28 6 38 28 27 10 27 59 48 28 34 4 -0.49 - 95 0 0 27 41 51 19 3 51.5 3 126 55 27 31 40 27 52 3 27 24 53 27 58 55 -0.70 - 94 0 0 27 7 25 19 3 51.9 4 126 55 26 57 19 27 17 34 26 50 34 27 24 23 -0.79 - 93 0 0 26 33 38 19 3 52.4 5 126 55 26 23 36 26 43 43 26 16 54 26 50 28 -0.84 - 92 0 0 26 0 29 19 3 53.0 6 127 55 25 50 31 26 10 30 25 43 51 26 17 13 -0.87 - 91 0 0 25 28 0 19 3 53.7 7 127 55 25 18 5 25 37 57 25 11 28 25 44 37 -0.90 - 90 0 0 24 56 11 19 3 54.6 8 128 55 24 46 20 25 6 4 24 39 46 25 12 42 -0.91 - 89 0 0 24 25 3 19 3 55.6 9 128 55 24 15 15 24 34 52 24 8 43 24 41 27 -0.92 - 88 0 0 23 54 36 19 3 56.7 10 129 55 23 44 52 24 4 21 23 38 22 24 10 54 -0.93 - 87 0 0 23 24 51 19 3 57.9 11 129 54 23 15 10 23 34 33 23 8 43 23 41 3 -0.94 - 86 0 0 22 55 48 19 3 59.2 12 130 54 22 46 11 23 5 27 22 39 46 23 11 55 -0.95 - 85 0 0 22 27 29 19 4 0.7 13 130 54 22 17 55 22 37 4 22 11 32 22 43 30 -0.95 - 84 0 0 21 59 52 19 4 2.2 14 130 54 21 50 22 22 9 24 21 44 1 22 15 48 -0.96 - 83 0 0 21 33 0 19 4 3.9 15 131 53 21 23 33 21 42 29 21 17 14 21 48 51 -0.96 - 82 0 0 21 6 52 19 4 5.7 16 131 53 20 57 28 21 16 18 20 51 11 21 22 38 -0.97 - 81 0 0 20 41 29 19 4 7.6 17 132 52 20 32 8 20 50 52 20 25 53 20 57 9 -0.97 - 80 0 0 20 16 50 19 4 9.6 18 132 52 20 7 32 20 26 10 20 1 19 20 32 26 -0.97 - 79 0 0 19 52 57 19 4 11.7 19 133 51 19 43 41 20 2 14 19 37 30 20 8 28 -0.98 - 78 0 0 19 29 49 19 4 13.9 20 133 51 19 20 36 19 39 3 19 14 27 19 45 15 -0.98 - 77 0 0 19 7 27 19 4 16.2 21 134 50 18 58 16 19 16 39 18 52 9 19 22 49 -0.98 - 76 0 0 18 45 50 19 4 18.7 22 134 50 18 36 43 18 55 0 18 30 37 19 1 8 -0.98 - 75 0 0 18 25 0 19 4 21.2 23 135 49 18 15 55 18 34 7 18 9 50 18 40 14 -0.99 - 74 0 0 18 4 56 19 4 23.8 24 135 48 17 55 53 18 14 1 17 49 50 18 20 6 -0.99 - 73 0 0 17 45 39 19 4 26.4 24 136 48 17 36 38 17 54 41 17 30 36 18 0 45 -0.99 - 72 0 0 17 27 8 19 4 29.2 25 136 47 17 18 9 17 36 8 17 12 9 17 42 10 -0.99 - 71 0 0 17 9 23 19 4 32.1 26 137 46 17 0 27 17 18 22 16 54 28 17 24 23 -0.99 - 70 0 0 16 52 26 19 4 35.0 27 137 46 16 43 31 17 1 22 16 37 34 17 7 22 -0.99 - 69 0 0 16 36 15 19 4 38.1 28 138 45 16 27 22 16 45 10 16 21 26 16 51 9 -1.00 - 68 0 0 16 20 52 19 4 41.2 29 138 44 16 12 1 16 29 45 16 6 6 16 35 42 -1.00 - 67 0 0 16 6 15 19 4 44.4 30 139 43 15 57 26 16 15 7 15 51 32 16 21 3 -1.00 - 66 0 0 15 52 26 19 4 47.6 30 140 42 15 43 38 16 1 16 15 37 45 16 7 11 -1.00 - 65 0 0 15 39 24 19 4 51.0 31 140 42 15 30 37 15 48 12 15 24 46 15 54 6 -1.00 - 64 0 0 15 27 9 19 4 54.4 32 141 41 15 18 24 15 35 56 15 12 33 15 41 49 -1.00 - 63 0 0 15 15 42 19 4 57.9 33 142 40 15 6 58 15 24 27 15 1 8 15 30 19 -1.00 - 62 0 0 15 5 1 19 5 1.4 33 142 39 14 56 19 15 13 45 14 50 29 15 19 37 -1.00 - 61 0 0 14 55 8 19 5 5.0 34 143 38 14 46 27 15 3 51 14 40 38 15 9 42 -1.01 - 60 0 0 14 46 3 19 5 8.7 35 144 37 14 37 23 14 54 46 14 31 35 15 0 36 -1.01 - 59 0 0 14 37 46 19 5 12.4 36 144 36 14 29 6 14 46 27 14 23 19 14 52 16 -1.01 - 58 0 0 14 30 15 19 5 16.2 36 145 36 14 21 36 14 38 55 14 15 49 14 44 44 -1.01 - 57 0 0 14 23 32 19 5 20.1 37 146 35 14 14 54 14 32 11 14 9 7 14 38 0 -1.01 - 56 0 0 14 17 36 19 5 24.0 38 147 34 14 8 59 14 26 15 14 3 13 14 32 3 -1.01 - 55 0 0 14 12 28 19 5 27.9 38 148 33 14 3 51 14 21 7 13 58 6 14 26 54 -1.01 - 54 0 0 14 8 8 19 5 31.9 39 149 32 13 59 31 14 16 46 13 53 46 14 22 33 -1.01 - 53 0 0 14 4 35 19 5 36.0 39 150 31 13 55 59 14 13 12 13 50 14 14 19 0 -1.01 - 52 0 0 14 1 50 19 5 40.1 40 150 30 13 53 14 14 10 27 13 47 29 14 16 14 -1.01 - 51 0 0 13 59 52 19 5 44.3 40 151 29 13 51 16 14 8 29 13 45 32 14 14 16 -1.01 - 50 0 0 13 58 42 19 5 48.4 41 152 28 13 50 7 14 7 19 13 44 22 14 13 6 -1.01 - 49 0 0 13 58 20 19 5 52.7 41 153 27 13 49 44 14 6 57 13 44 0 14 12 43 -1.01 - 48 0 0 13 58 45 19 5 56.9 42 154 26 13 50 9 14 7 22 13 44 25 14 13 9 -1.02 - 47 0 0 13 59 58 19 6 1.2 42 156 25 13 51 22 14 8 35 13 45 38 14 14 22 -1.02 - 46 0 0 14 1 59 19 6 5.6 42 157 24 13 53 23 14 10 36 13 47 38 14 16 23 -1.02 - 45 0 0 14 4 47 19 6 10.0 43 158 23 13 56 11 14 13 25 13 50 26 14 19 12 -1.02 - 44 0 0 14 8 24 19 6 14.4 43 159 22 13 59 47 14 17 2 13 54 1 14 22 49 -1.02 - 43 0 0 14 12 48 19 6 18.8 43 160 21 14 4 10 14 21 26 13 58 25 14 27 15 -1.02 - 42 0 0 14 18 0 19 6 23.2 44 161 20 14 9 22 14 26 39 14 3 36 14 32 28 -1.02 - 41 0 0 14 24 0 19 6 27.7 44 162 19 14 15 21 14 32 40 14 9 34 14 38 29 -1.02 - 40 0 0 14 30 47 19 6 32.2 44 163 18 14 22 8 14 39 28 14 16 21 14 45 18 -1.02 - 39 0 0 14 38 23 19 6 36.7 44 165 17 14 29 42 14 47 5 14 23 55 14 52 55 -1.02 - 38 0 0 14 46 46 19 6 41.2 44 166 16 14 38 5 14 55 29 14 32 17 15 1 20 -1.02 - 37 0 0 14 55 58 19 6 45.8 44 167 15 14 47 15 15 4 42 14 41 26 15 10 33 -1.02 - 36 0 0 15 5 57 19 6 50.3 44 168 14 14 57 13 15 14 42 14 51 23 15 20 34 -1.02 - 35 0 0 15 16 44 19 6 54.9 44 170 13 15 7 59 15 25 31 15 2 9 15 31 24 -1.02 - 34 0 0 15 28 20 19 6 59.5 44 171 12 15 19 33 15 37 7 15 13 42 15 43 1 -1.02 - 33 0 0 15 40 43 19 7 4.1 44 172 11 15 31 55 15 49 32 15 26 2 15 55 27 -1.02 - 32 0 0 15 53 54 19 7 8.6 44 173 10 15 45 5 16 2 45 15 39 11 16 8 41 -1.02 - 31 0 0 16 7 53 19 7 13.2 44 175 9 15 59 2 16 16 45 15 53 7 16 22 43 -1.02 - 30 0 0 16 22 40 19 7 17.8 44 176 8 16 13 47 16 31 34 16 7 52 16 37 33 -1.02 - 29 0 0 16 38 15 19 7 22.4 44 177 7 16 29 21 16 47 11 16 23 24 16 53 11 -1.02 - 28 0 0 16 54 38 19 7 26.9 44 178 6 16 45 42 17 3 36 16 39 43 17 9 37 -1.02 - 27 0 0 17 11 49 19 7 31.5 43 180 5 17 2 50 17 20 49 16 56 50 17 26 51 -1.02 - 26 0 0 17 29 47 19 7 36.0 43 181 4 17 20 46 17 38 49 17 14 45 17 44 53 -1.02 - 25 0 0 17 48 33 19 7 40.5 43 182 3 17 39 30 17 57 37 17 33 28 18 3 43 -1.02 - 24 0 0 18 8 7 19 7 45.0 42 183 2 17 59 2 18 17 14 17 52 58 18 23 20 -1.02 - 23 0 0 18 28 28 19 7 49.5 42 184 1 18 19 20 18 37 37 18 13 15 18 43 46 -1.02 - 22 0 0 18 49 37 19 7 54.0 41 186 0 18 40 26 18 58 48 18 34 19 19 4 58 -1.02 - 21 0 0 19 11 32 19 7 58.4 41 187 -1 19 2 20 19 20 47 18 56 11 19 26 59 -1.02 - 20 0 0 19 34 15 19 8 2.8 40 188 -2 19 25 0 19 43 32 19 18 49 19 49 46 -1.02 - 19 0 0 19 57 45 19 8 7.1 40 189 -3 19 48 26 20 7 4 19 42 14 20 13 20 -1.02 - 18 0 0 20 22 1 19 8 11.5 39 190 -4 20 12 40 20 31 23 20 6 25 20 37 41 -1.02 - 17 0 0 20 47 3 19 8 15.7 39 191 -5 20 37 39 20 56 29 20 31 22 21 2 49 -1.02 - 16 0 0 21 12 52 19 8 20.0 38 192 -6 21 3 25 21 22 21 20 57 6 21 28 42 -1.02 - 15 0 0 21 39 26 19 8 24.1 38 193 -7 21 29 56 21 48 58 21 23 35 21 55 22 -1.02 - 14 0 0 22 6 46 19 8 28.3 37 194 -8 21 57 12 22 16 21 21 50 49 22 22 47 -1.02 - 13 0 0 22 34 51 19 8 32.4 36 195 -8 22 25 14 22 44 29 22 18 49 22 50 58 -1.02 - 12 0 0 23 3 40 19 8 36.4 36 196 -9 22 54 0 23 13 22 22 47 32 23 19 53 -1.02 - 11 0 0 23 33 14 19 8 40.3 35 197 -10 23 23 30 23 43 0 23 17 0 23 49 33 -1.02 - 10 0 0 24 3 31 19 8 44.2 34 198 -11 23 53 44 24 13 21 23 47 12 24 19 57 -1.02 - 9 0 0 24 34 32 19 8 48.0 33 199 -12 24 24 41 24 44 25 24 18 6 24 51 4 -1.02 - 8 0 0 25 6 15 19 8 51.8 32 200 -13 24 56 20 25 16 12 24 49 43 25 22 53 -1.02 - 7 0 0 25 38 40 19 8 55.5 32 200 -14 25 28 41 25 48 41 25 22 2 25 55 25 -1.02 - 6 0 0 26 11 47 19 8 59.1 31 201 -15 26 1 44 26 21 52 25 55 1 26 28 38 -1.02 - 5 0 0 26 45 33 19 9 2.6 30 202 -16 26 35 26 26 55 43 26 28 41 27 2 32 -1.02 - 4 0 0 27 20 0 19 9 6.0 29 203 -17 27 9 49 27 30 13 27 3 1 27 37 5 -1.02 - 3 0 0 27 55 5 19 9 9.4 28 204 -18 27 44 50 28 5 23 27 37 59 28 12 18 -1.02 - 2 0 0 28 30 49 19 9 12.6 27 205 -18 28 20 29 28 41 11 28 13 36 28 48 8 -1.02 - 1 0 0 29 7 9 19 9 15.8 26 205 -19 28 56 45 29 17 36 28 49 49 29 24 36 -1.02 0 0 0 29 44 6 19 9 18.8 25 206 -20 29 33 37 29 54 37 29 26 38 30 1 40 -1.02 1 0 0 30 21 37 19 9 21.8 24 207 -21 30 11 4 30 32 12 30 4 2 30 39 19 -1.02 2 0 0 30 59 42 19 9 24.6 23 208 -22 30 49 5 31 10 22 30 41 59 31 17 32 -1.02 3 0 0 31 38 20 19 9 27.3 23 208 -23 31 27 37 31 49 4 31 20 29 31 56 17 -1.02 4 0 0 32 17 28 19 9 30.0 22 209 -23 32 6 42 32 28 18 31 59 30 32 35 34 -1.02 5 0 0 32 57 7 19 9 32.5 21 210 -24 32 46 16 33 8 1 32 39 1 33 15 21 -1.02 6 0 0 33 37 14 19 9 34.9 20 210 -25 33 26 18 33 48 13 33 19 0 33 55 36 -1.02 7 0 0 34 17 49 19 9 37.2 19 211 -25 34 6 48 34 28 52 33 59 27 34 36 18 -1.02 8 0 0 34 58 48 19 9 39.3 18 212 -26 34 47 42 35 9 57 34 40 18 35 17 26 -1.02 9 0 0 35 40 11 19 9 41.3 16 212 -27 35 29 1 35 51 25 35 21 33 35 58 58 -1.02 10 0 0 36 21 57 19 9 43.3 15 213 -27 36 10 42 36 33 16 36 3 11 36 40 51 -1.02 11 0 0 37 4 3 19 9 45.1 14 214 -28 36 52 43 37 15 26 36 45 9 37 23 6 -1.03 12 0 0 37 46 28 19 9 46.7 13 214 -28 37 35 3 37 57 56 37 27 26 38 5 39 -1.03 13 0 0 38 29 9 19 9 48.3 12 215 -29 38 17 39 38 40 42 38 9 59 38 48 28 -1.03 14 0 0 39 12 6 19 9 49.7 11 216 -30 39 0 31 39 23 44 38 52 47 39 31 33 -1.03 15 0 0 39 55 15 19 9 50.9 10 216 -30 39 43 35 40 6 57 39 35 49 40 14 50 -1.03 16 0 0 40 38 35 19 9 52.1 9 217 -30 40 26 50 40 50 22 40 19 1 40 58 18 -1.04 17 0 0 41 22 4 19 9 53.1 8 218 -31 41 10 15 41 33 56 41 2 22 41 41 55 -1.04 18 0 0 42 5 39 19 9 54.0 7 219 -31 41 53 46 42 17 36 41 45 50 42 25 38 -1.04 19 0 0 42 49 19 19 9 54.8 6 219 -32 42 37 21 43 1 21 42 29 23 43 9 26 -1.05 20 0 0 43 33 2 19 9 55.4 5 220 -32 43 20 59 43 45 8 43 12 58 43 53 16 -1.06 21 0 0 44 16 44 19 9 56.0 4 221 -32 44 4 38 44 28 55 43 56 33 44 37 6 -1.07 22 0 0 45 0 25 19 9 56.4 3 221 -33 44 48 14 45 12 40 44 40 7 45 20 54 -1.08 23 0 0 45 44 1 19 9 56.7 2 222 -33 45 31 47 45 56 20 45 23 37 46 4 37 -1.12 24 0 0 46 27 31 19 9 56.8 1 223 -33 46 15 13 46 39 54 46 7 0 46 48 14 -1.22 25 0 0 47 10 53 19 9 56.9 0 223 -33 46 58 30 .. .. .. 46 50 15 .. .. .. -3.57 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 302-219849 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 19 03.1694 DE: -29 37 15.796 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 19 03.1694 DE: -29 37 15.796 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 11.8 * B mag [mag]: 13.9 * Diameter [mas]: 0.50 * 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]: 2.51180 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", 80.46° remarks: * orbital elements for (29665)1998 WD24 : Mean anomaly = 49.1967199340 deg Arg. of pericenter = 239.1243138881 deg Long. of node = 346.8881711786 deg Inclination = 7.9869946064 deg Eccentricity = 0.2107377001 Semimajor axis = 2.8687766108 AU Perihelion dist = 2.2642172258 AU Mag: H = 12.98, G = 0.15 Epoch of elements : MJD 60588.79645929 TDT (2024 Oct 05.7965) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr25,0.91,2024,10,5,19.115030,-0.145317,0.698556,13.471161,2.794587,0.005629,0.000110,0.000000,0.000000 -26.5157,-29.6125,-109.68,-5.15,False UCAC4 302-219849,18.31754710,-29.6210546,13.90,11.77,10.62,0.5,0,,18.34378131,-29.6124516,6.34,7.04,0,0,0 29665,1998 WD24,18.11,22.190,2.5118,0,0,3.617,9.79,,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 1.335,0.0190,0.0040,80,0.0041,Known errors,0.69,0,-1,-1 20241005_219849,60140.61 ------ 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