IOTA/IOTA-ES occultation update for (28199) 1998 XA42 / UCAC4 325-202667 event on 2024 Nov 09, 14:07 UT Visible from Summary ------- On 2024 Nov 09 UT, the 9.963 km diameter asteroid (28199) 1998 XA42 will occult a 11.5 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 7.65 mag to 19.13 mag (the magnitude of the asteroid) for at most 0.300 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 Nov 09, 14:05 - 2024 Nov 09, 14:10 * geocentric midpoint of event [JD]: 2460624.08887742 * magnitude of target star: 11.48 * magnitude drop [mag]: 7.65 * estimated maximum duration [s]: 0.300 * Moon: 54 % sunlit, 35° distance * Sun: 61° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 0.33 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.001", 89°) * approx speed of asteroid's shadow [km/s]: 32.7465 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 325-202667 by 28199 1998 XA42 on 2024 Nov 9 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 - 46 0 0 27 3 45 14 5 24.4 1 119 45 26 59 54 27 7 36 26 57 20 27 10 10 .... - 45 0 0 26 34 51 14 5 24.5 2 119 45 26 31 0 26 38 41 26 28 27 26 41 15 -0.38 - 44 0 0 26 6 13 14 5 24.6 3 120 46 26 2 23 26 10 3 25 59 50 26 12 36 -0.53 - 43 0 0 25 37 52 14 5 24.8 4 120 47 25 34 3 25 41 41 25 31 31 25 44 14 -0.59 - 42 0 0 25 9 49 14 5 25.1 5 120 47 25 6 1 25 13 38 25 3 29 25 16 10 -0.63 - 41 0 0 24 42 5 14 5 25.5 6 121 48 24 38 18 24 45 53 24 35 46 24 48 25 -0.65 - 40 0 0 24 14 41 14 5 26.0 7 121 49 24 10 54 24 18 28 24 8 23 24 20 59 -0.67 - 39 0 0 23 47 37 14 5 26.5 8 122 49 23 43 51 23 51 23 23 41 20 23 53 54 -0.68 - 38 0 0 23 20 54 14 5 27.1 9 122 50 23 17 8 23 24 39 23 14 38 23 27 10 -0.69 - 37 0 0 22 54 32 14 5 27.8 10 123 50 22 50 47 22 58 17 22 48 18 23 0 47 -0.70 - 36 0 0 22 28 33 14 5 28.6 11 123 51 22 24 49 22 32 18 22 22 20 22 34 47 -0.71 - 35 0 0 22 2 57 14 5 29.4 12 123 51 21 59 14 22 6 41 21 56 45 22 9 10 -0.71 - 34 0 0 21 37 45 14 5 30.3 13 124 51 21 34 3 21 41 28 21 31 34 21 43 57 -0.71 - 33 0 0 21 12 58 14 5 31.3 14 124 52 21 9 16 21 16 40 21 6 48 21 19 8 -0.72 - 32 0 0 20 48 35 14 5 32.4 15 125 52 20 44 54 20 52 17 20 42 26 20 54 44 -0.72 - 31 0 0 20 24 38 14 5 33.6 16 125 52 20 20 57 20 28 19 20 18 31 20 30 46 -0.72 - 30 0 0 20 1 7 14 5 34.8 17 125 53 19 57 27 20 4 47 19 55 1 20 7 14 -0.73 - 29 0 0 19 38 3 14 5 36.1 18 126 53 19 34 24 19 41 43 19 31 58 19 44 9 -0.73 - 28 0 0 19 15 26 14 5 37.4 19 126 53 19 11 47 19 19 5 19 9 22 19 21 31 -0.73 - 27 0 0 18 53 17 14 5 38.8 20 127 53 18 49 39 18 56 55 18 47 14 18 59 21 -0.73 - 26 0 0 18 31 36 14 5 40.3 21 127 53 18 27 58 18 35 13 18 25 34 18 37 38 -0.73 - 25 0 0 18 10 23 14 5 41.9 22 128 53 18 6 47 18 14 0 18 4 22 18 16 25 -0.74 - 24 0 0 17 49 40 14 5 43.5 23 128 53 17 46 4 17 53 16 17 43 40 17 55 41 -0.74 - 23 0 0 17 29 26 14 5 45.2 24 128 53 17 25 51 17 33 2 17 23 27 17 35 26 -0.74 - 22 0 0 17 9 42 14 5 47.0 24 129 53 17 6 7 17 13 17 17 3 44 17 15 41 -0.74 - 21 0 0 16 50 28 14 5 48.8 25 129 53 16 46 54 16 54 3 16 44 31 16 56 26 -0.74 - 20 0 0 16 31 45 14 5 50.7 26 130 53 16 28 11 16 35 19 16 25 49 16 37 42 -0.74 - 19 0 0 16 13 33 14 5 52.7 27 130 53 16 10 0 16 17 6 16 7 38 16 19 29 -0.74 - 18 0 0 15 55 52 14 5 54.7 28 131 53 15 52 19 15 59 25 15 49 58 16 1 47 -0.74 - 17 0 0 15 38 42 14 5 56.8 29 131 53 15 35 10 15 42 15 15 32 49 15 44 36 -0.75 - 16 0 0 15 22 5 14 5 58.9 30 132 52 15 18 33 15 25 37 15 16 12 15 27 58 -0.75 - 15 0 0 15 5 59 14 6 1.1 31 132 52 15 2 28 15 9 30 15 0 7 15 11 51 -0.75 - 14 0 0 14 50 26 14 6 3.4 32 133 52 14 46 55 14 53 57 14 44 35 14 56 17 -0.75 - 13 0 0 14 35 25 14 6 5.7 33 133 51 14 31 55 14 38 55 14 29 35 14 41 16 -0.75 - 12 0 0 14 20 57 14 6 8.0 34 134 51 14 17 27 14 24 27 14 15 8 14 26 47 -0.75 - 11 0 0 14 7 2 14 6 10.4 34 135 51 14 3 33 14 10 32 14 1 14 14 12 51 -0.75 - 10 0 0 13 53 41 14 6 12.9 35 135 50 13 50 12 13 57 10 13 47 53 13 59 29 -0.75 - 9 0 0 13 40 52 14 6 15.4 36 136 50 13 37 24 13 44 21 13 35 5 13 46 40 -0.75 - 8 0 0 13 28 38 14 6 18.0 37 137 49 13 25 9 13 32 6 13 22 51 13 34 25 -0.75 - 7 0 0 13 16 57 14 6 20.6 38 137 49 13 13 29 13 20 25 13 11 11 13 22 43 -0.75 - 6 0 0 13 5 49 14 6 23.2 39 138 48 13 2 22 13 9 17 13 0 4 13 11 35 -0.75 - 5 0 0 12 55 16 14 6 25.9 39 139 47 12 51 49 12 58 44 12 49 32 13 1 2 -0.75 - 4 0 0 12 45 17 14 6 28.7 40 139 47 12 41 51 12 48 44 12 39 33 12 51 2 -0.76 - 3 0 0 12 35 53 14 6 31.4 41 140 46 12 32 26 12 39 19 12 30 9 12 41 37 -0.76 - 2 0 0 12 27 2 14 6 34.3 42 141 46 12 23 36 12 30 29 12 21 19 12 32 46 -0.76 - 1 0 0 12 18 47 14 6 37.1 42 142 45 12 15 21 12 22 13 12 13 4 12 24 30 -0.76 0 0 0 12 11 5 14 6 40.0 43 143 44 12 7 40 12 14 31 12 5 23 12 16 48 -0.76 1 0 0 12 3 59 14 6 42.9 44 144 44 12 0 33 12 7 24 11 58 17 12 9 41 -0.76 2 0 0 11 57 27 14 6 45.9 44 145 43 11 54 2 12 0 52 11 51 45 12 3 9 -0.76 3 0 0 11 51 30 14 6 48.9 45 145 42 11 48 5 11 54 55 11 45 49 11 57 12 -0.76 4 0 0 11 46 8 14 6 51.9 46 146 41 11 42 43 11 49 33 11 40 27 11 51 49 -0.76 5 0 0 11 41 21 14 6 55.0 46 147 41 11 37 56 11 44 45 11 35 40 11 47 2 -0.76 6 0 0 11 37 8 14 6 58.1 47 149 40 11 33 44 11 40 33 11 31 28 11 42 49 -0.76 7 0 0 11 33 31 14 7 1.2 47 150 39 11 30 7 11 36 56 11 27 51 11 39 12 -0.76 8 0 0 11 30 29 14 7 4.4 48 151 38 11 27 5 11 33 54 11 24 49 11 36 10 -0.76 9 0 0 11 28 2 14 7 7.5 49 152 37 11 24 38 11 31 27 11 22 22 11 33 43 -0.76 10 0 0 11 26 11 14 7 10.7 49 153 37 11 22 46 11 29 35 11 20 30 11 31 51 -0.76 11 0 0 11 24 54 14 7 14.0 49 154 36 11 21 30 11 28 18 11 19 14 11 30 34 -0.76 12 0 0 11 24 13 14 7 17.2 50 156 35 11 20 49 11 27 37 11 18 33 11 29 53 -0.76 13 0 0 11 24 7 14 7 20.5 50 157 34 11 20 42 11 27 31 11 18 27 11 29 47 -0.76 14 0 0 11 24 36 14 7 23.8 51 158 33 11 21 12 11 28 0 11 18 56 11 30 16 -0.76 15 0 0 11 25 40 14 7 27.1 51 160 32 11 22 16 11 29 4 11 20 0 11 31 20 -0.76 16 0 0 11 27 20 14 7 30.4 51 161 31 11 23 55 11 30 44 11 21 39 11 33 0 -0.76 17 0 0 11 29 34 14 7 33.7 52 162 30 11 26 10 11 32 59 11 23 54 11 35 15 -0.76 18 0 0 11 32 24 14 7 37.0 52 164 30 11 29 0 11 35 49 11 26 44 11 38 5 -0.76 19 0 0 11 35 50 14 7 40.4 52 165 29 11 32 25 11 39 14 11 30 9 11 41 31 -0.76 20 0 0 11 39 50 14 7 43.8 52 167 28 11 36 25 11 43 15 11 34 9 11 45 31 -0.76 21 0 0 11 44 26 14 7 47.1 52 168 27 11 41 1 11 47 51 11 38 44 11 50 7 -0.76 22 0 0 11 49 36 14 7 50.5 53 170 26 11 46 11 11 53 1 11 43 55 11 55 18 -0.76 23 0 0 11 55 22 14 7 53.9 53 171 25 11 51 57 11 58 47 11 49 40 12 1 4 -0.76 24 0 0 12 1 42 14 7 57.3 53 173 24 11 58 17 12 5 8 11 56 0 12 7 25 -0.76 25 0 0 12 8 38 14 8 0.7 53 174 23 12 5 12 12 12 4 12 2 56 12 14 21 -0.76 26 0 0 12 16 9 14 8 4.1 53 176 22 12 12 43 12 19 35 12 10 26 12 21 52 -0.76 27 0 0 12 24 14 14 8 7.5 53 177 21 12 20 48 12 27 40 12 18 31 12 29 58 -0.76 28 0 0 12 32 54 14 8 10.9 52 179 20 12 29 28 12 36 21 12 27 10 12 38 38 -0.76 29 0 0 12 42 9 14 8 14.3 52 180 19 12 38 42 12 45 36 12 36 25 12 47 54 -0.76 30 0 0 12 51 58 14 8 17.6 52 182 18 12 48 31 12 55 25 12 46 13 12 57 44 -0.76 31 0 0 13 2 22 14 8 21.0 52 183 17 12 58 55 13 5 50 12 56 37 13 8 8 -0.76 32 0 0 13 13 20 14 8 24.4 52 185 16 13 9 52 13 16 48 13 7 34 13 19 7 -0.76 33 0 0 13 24 53 14 8 27.8 51 186 15 13 21 24 13 28 21 13 19 6 13 30 40 -0.76 34 0 0 13 36 59 14 8 31.1 51 188 14 13 33 30 13 40 28 13 31 12 13 42 47 -0.76 35 0 0 13 49 39 14 8 34.5 51 189 13 13 46 10 13 53 9 13 43 51 13 55 28 -0.76 36 0 0 14 2 54 14 8 37.8 50 190 12 13 59 24 14 6 23 13 57 5 14 8 43 -0.76 37 0 0 14 16 41 14 8 41.1 50 192 11 14 13 12 14 20 11 14 10 52 14 22 31 -0.76 38 0 0 14 31 3 14 8 44.4 49 193 10 14 27 32 14 34 33 14 25 12 14 36 53 -0.76 39 0 0 14 45 57 14 8 47.7 49 194 9 14 42 26 14 49 28 14 40 6 14 51 49 -0.76 40 0 0 15 1 25 14 8 50.9 48 196 8 14 57 53 15 4 56 14 55 33 15 7 17 -0.76 41 0 0 15 17 25 14 8 54.2 48 197 7 15 13 53 15 20 57 15 11 32 15 23 18 -0.76 42 0 0 15 33 58 14 8 57.4 47 198 6 15 30 26 15 37 30 15 28 4 15 39 52 -0.76 43 0 0 15 51 3 14 9 0.5 47 199 5 15 47 30 15 54 36 15 45 9 15 56 58 -0.76 44 0 0 16 8 40 14 9 3.7 46 200 4 16 5 7 16 12 14 16 2 45 16 14 36 -0.76 45 0 0 16 26 50 14 9 6.8 46 201 3 16 23 16 16 30 24 16 20 53 16 32 46 -0.76 46 0 0 16 45 30 14 9 9.9 45 202 2 16 41 56 16 49 5 16 39 33 16 51 28 -0.76 47 0 0 17 4 42 14 9 13.0 44 204 1 17 1 7 17 8 17 16 58 44 17 10 41 -0.76 48 0 0 17 24 24 14 9 16.0 44 205 0 17 20 48 17 28 0 17 18 25 17 30 24 -0.76 49 0 0 17 44 37 14 9 19.0 43 206 -1 17 41 1 17 48 14 17 38 37 17 50 38 -0.76 50 0 0 18 5 20 14 9 22.0 42 206 -2 18 1 43 18 8 57 17 59 19 18 11 22 -0.76 51 0 0 18 26 32 14 9 24.9 41 207 -3 18 22 55 18 30 10 18 20 30 18 32 35 -0.76 52 0 0 18 48 14 14 9 27.7 41 208 -4 18 44 36 18 51 53 18 42 11 18 54 18 -0.76 53 0 0 19 10 25 14 9 30.6 40 209 -5 19 6 46 19 14 4 19 4 20 19 16 30 -0.76 54 0 0 19 33 3 14 9 33.4 39 210 -6 19 29 24 19 36 43 19 26 58 19 39 10 -0.76 55 0 0 19 56 10 14 9 36.1 38 211 -7 19 52 30 19 59 50 19 50 3 20 2 17 -0.76 56 0 0 20 19 44 14 9 38.8 37 212 -8 20 16 3 20 23 25 20 13 36 20 25 52 -0.76 57 0 0 20 43 44 14 9 41.4 37 213 -9 20 40 2 20 47 26 20 37 35 20 49 54 -0.76 58 0 0 21 8 11 14 9 44.0 36 213 -10 21 4 28 21 11 53 21 2 0 21 14 21 -0.76 59 0 0 21 33 3 14 9 46.6 35 214 -11 21 29 20 21 36 46 21 26 51 21 39 15 -0.76 60 0 0 21 58 20 14 9 49.0 34 215 -12 21 54 36 22 2 4 21 52 8 22 4 33 -0.76 61 0 0 22 24 2 14 9 51.5 33 216 -13 22 20 17 22 27 46 22 17 48 22 30 16 -0.76 62 0 0 22 50 7 14 9 53.8 32 216 -14 22 46 22 22 53 52 22 43 52 22 56 23 -0.76 63 0 0 23 16 35 14 9 56.1 31 217 -15 23 12 50 23 20 21 23 10 19 23 22 52 -0.76 64 0 0 23 43 26 14 9 58.4 30 218 -16 23 39 39 23 47 13 23 37 9 23 49 44 -0.76 65 0 0 24 10 38 14 10 0.6 29 218 -17 24 6 51 24 14 25 24 4 20 24 16 57 -0.76 66 0 0 24 38 11 14 10 2.7 28 219 -18 24 34 23 24 41 59 24 31 51 24 44 31 -0.76 67 0 0 25 6 4 14 10 4.8 28 220 -19 25 2 15 25 9 52 24 59 43 25 12 25 -0.76 68 0 0 25 34 16 14 10 6.7 27 220 -20 25 30 26 25 38 5 25 27 54 25 40 38 -0.76 69 0 0 26 2 46 14 10 8.7 26 221 -21 25 58 56 26 6 36 25 56 23 26 9 10 -0.77 70 0 0 26 31 34 14 10 10.5 25 221 -22 26 27 43 26 35 25 26 25 10 26 37 59 -0.77 71 0 0 27 0 39 14 10 12.3 24 222 -23 26 56 47 27 4 30 26 54 13 27 7 5 -0.77 72 0 0 27 29 59 14 10 14.0 23 223 -24 27 26 7 27 33 51 27 23 32 27 36 26 -0.77 73 0 0 27 59 34 14 10 15.7 22 223 -25 27 55 41 28 3 27 27 53 6 28 6 2 -0.77 74 0 0 28 29 23 14 10 17.3 21 224 -26 28 25 30 28 33 17 28 22 54 28 35 52 -0.77 75 0 0 28 59 25 14 10 18.8 20 224 -27 28 55 31 29 3 19 28 52 55 29 5 56 -0.77 76 0 0 29 29 39 14 10 20.2 19 225 -28 29 25 44 29 33 34 29 23 8 29 36 11 -0.77 77 0 0 30 0 4 14 10 21.5 18 226 -29 29 56 9 30 4 0 29 53 32 30 6 37 -0.77 78 0 0 30 30 39 14 10 22.8 17 226 -29 30 26 43 30 34 35 30 24 6 30 37 12 -0.77 79 0 0 31 1 22 14 10 24.0 16 227 -30 30 57 25 31 5 19 30 54 48 31 7 57 -0.77 80 0 0 31 32 14 14 10 25.2 15 227 -31 31 28 17 31 36 11 31 25 39 31 38 49 -0.77 81 0 0 32 3 13 14 10 26.2 14 228 -32 31 59 15 32 7 11 31 56 37 32 9 49 -0.77 82 0 0 32 34 18 14 10 27.2 13 229 -33 32 30 19 32 38 16 32 27 41 32 40 55 -0.77 83 0 0 33 5 27 14 10 28.1 12 229 -34 33 1 28 33 9 26 32 58 50 33 12 5 -0.77 84 0 0 33 36 40 14 10 29.0 11 230 -35 33 32 41 33 40 40 33 30 2 33 43 20 -0.77 85 0 0 34 7 57 14 10 29.7 10 230 -35 34 3 57 34 11 57 34 1 17 34 14 36 -0.77 86 0 0 34 39 14 14 10 30.4 9 231 -36 34 35 14 34 43 15 34 32 34 34 45 55 -0.77 87 0 0 35 10 33 14 10 31.0 8 231 -37 35 6 32 35 14 34 35 3 52 35 17 14 -0.78 88 0 0 35 41 51 14 10 31.6 7 232 -38 35 37 50 35 45 52 35 35 9 35 48 33 -0.78 89 0 0 36 13 7 14 10 32.1 6 233 -39 36 9 6 36 17 9 36 6 25 36 19 50 -0.78 90 0 0 36 44 21 14 10 32.5 5 233 -39 36 40 20 36 48 23 36 37 39 36 51 5 -0.78 91 0 0 37 15 32 14 10 32.8 4 234 -40 37 11 30 37 19 34 37 8 49 37 22 16 -0.79 92 0 0 37 46 38 14 10 33.1 3 234 -41 37 42 36 37 50 41 37 39 54 37 53 22 -0.80 93 0 0 38 17 38 14 10 33.3 2 235 -41 38 13 36 38 21 41 38 10 54 38 24 23 -0.81 94 0 0 38 48 32 14 10 33.4 1 236 -42 38 44 29 38 52 35 38 41 48 38 55 17 -0.85 95 0 0 39 19 18 14 10 33.5 1 236 -43 39 15 15 39 23 22 39 12 34 39 26 4 -1.00 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 325-202667 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 19 07.5392 DE: -25 09 41.408 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 19 07.5390 DE: -25 09 41.408 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 11.5 * B mag [mag]: 11.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (28199) 1998 XA42 asteroid class: approx. diameter [km]: 10 approx. diameter ["]: 0.005 distance from Earth [AU]: 2.82280 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#45 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): 0.011", 0.001", 89.189° remarks: * orbital elements for (28199)1998 XA42 : Mean anomaly = 238.1059976528 deg Arg. of pericenter = 339.6334522310 deg Long. of node = 90.8869859063 deg Inclination = 5.4947144099 deg Eccentricity = 0.0035061281 Semimajor axis = 2.4858168095 AU Perihelion dist = 2.4771012174 AU Mag: H = 13.90, G = 0.15 Epoch of elements : MJD 60623.58887716 TDT (2024 Nov 09.5889) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#452023Apr25,0.30,2024,11,9,14.133058,-0.075258,0.602233,18.340270,2.293058,0.004964,0.000541,-0.000001,0.000000 28.9215,-25.1173,-36.02,-17.10,False UCAC4 325-202667,19.31876093,-25.1615022,11.89,11.48,11.26,0.0,0,,19.34382955,-25.1173462,7.65,7.43,0,0,0 28199,1998 XA42,19.13,9.963,2.8228,0,0,4.207,7.15,,1.0,0 0,237.9579,2024,11,9,339.6335,90.8870,5.4947,0.00351,2.48582,2.47710,13.89,5.0,0.15 1.333,0.0113,0.0011,89,0.0016,Known errors,1.46,0,-1,-1 20241109_202667,60140.69 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:33 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org