IOTA/IOTA-ES occultation update for (49513) 1999 CK28 / UCAC4 341-178541 event on 2024 Oct 23, 05:42 UT Visible from Summary ------- On 2024 Oct 23 UT, the 18.9314456085433 km diameter asteroid (49513) 1999 CK28 will occult a 10.7 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 8.20 mag to 18.92 mag (the magnitude of the asteroid) for at most 0.810 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 23, 05:39 - 2024 Oct 23, 05:45 * geocentric midpoint of event [JD]: 2460606.73799096 * magnitude of target star: 10.72 * magnitude drop [mag]: 8.20 * estimated maximum duration [s]: 0.810 * Moon: 61 % sunlit, 173° distance * Sun: 74° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 28 * 1 sigma uncertainty interval [path widths]: +/- 0.37 * 1 sigma uncertainty interval [seconds]: +/- 2.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.020, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.021", 0.001", 107°) * approx speed of asteroid's shadow [km/s]: 23.9633 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 341-178541 by 49513 1999 CK28 on 2024 Oct 23 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 49 57 24 5 39 35.6 0 125 27 49 48 19 50 6 31 49 41 38 50 13 15 .... 108 0 0 49 29 51 5 39 35.6 1 126 27 49 20 47 49 38 58 49 14 6 49 45 42 -0.43 109 0 0 49 2 5 5 39 35.8 2 127 27 48 53 1 49 11 12 48 46 21 49 17 55 -0.67 110 0 0 48 34 7 5 39 36.0 3 128 28 48 25 3 48 43 13 48 18 23 48 49 56 -0.76 111 0 0 48 5 57 5 39 36.3 4 128 28 47 56 54 48 15 3 47 50 14 48 21 46 -0.82 112 0 0 47 37 36 5 39 36.6 4 129 28 47 28 33 47 46 41 47 21 54 47 53 24 -0.85 113 0 0 47 9 5 5 39 37.1 5 130 28 47 0 3 47 18 10 46 53 24 47 24 52 -0.87 114 0 0 46 40 25 5 39 37.6 6 131 28 46 31 24 46 49 29 46 24 45 46 56 11 -0.89 115 0 0 46 11 37 5 39 38.2 7 131 29 46 2 36 46 20 40 45 55 58 46 27 21 -0.90 116 0 0 45 42 42 5 39 38.9 8 132 29 45 33 42 45 51 44 45 27 4 45 58 24 -0.91 117 0 0 45 13 40 5 39 39.7 9 133 29 45 4 41 45 22 41 44 58 4 45 29 21 -0.92 118 0 0 44 44 33 5 39 40.6 9 134 29 44 35 34 44 53 33 44 28 59 45 0 12 -0.93 119 0 0 44 15 21 5 39 41.5 10 134 29 44 6 24 44 24 21 43 59 49 44 30 59 -0.94 120 0 0 43 46 7 5 39 42.6 11 135 29 43 37 10 43 55 5 43 30 36 44 1 42 -0.94 121 0 0 43 16 49 5 39 43.7 12 136 29 43 7 54 43 25 46 43 1 21 43 32 23 -0.94 122 0 0 42 47 31 5 39 45.0 13 137 29 42 38 37 42 56 27 42 32 4 43 3 2 -0.95 123 0 0 42 18 12 5 39 46.3 14 137 29 42 9 19 42 27 6 42 2 48 42 33 41 -0.95 124 0 0 41 48 54 5 39 47.7 15 138 29 41 40 2 41 57 47 41 33 32 42 4 21 -0.95 125 0 0 41 19 37 5 39 49.3 15 139 29 41 10 47 41 28 29 41 4 17 41 35 2 -0.96 126 0 0 40 50 23 5 39 50.9 16 139 29 40 41 35 40 59 14 40 35 6 41 5 46 -0.96 127 0 0 40 21 13 5 39 52.6 17 140 28 40 12 26 40 30 2 40 5 58 40 36 33 -0.96 128 0 0 39 52 8 5 39 54.4 18 141 28 39 43 22 40 0 56 39 36 56 40 7 26 -0.96 129 0 0 39 23 9 5 39 56.3 19 142 28 39 14 25 39 31 55 39 7 59 39 38 24 -0.97 130 0 0 38 54 17 5 39 58.3 20 142 28 38 45 34 39 3 1 38 39 10 39 9 29 -0.97 131 0 0 38 25 32 5 40 0.4 21 143 28 38 16 51 38 34 15 38 10 28 38 40 41 -0.97 132 0 0 37 56 57 5 40 2.6 21 144 27 37 48 17 38 5 38 37 41 55 38 12 3 -0.97 133 0 0 37 28 31 5 40 4.9 22 145 27 37 19 53 37 37 10 37 13 32 37 43 34 -0.97 134 0 0 37 0 16 5 40 7.2 23 146 27 36 51 39 37 8 54 36 45 20 37 15 16 -0.97 135 0 0 36 32 13 5 40 9.7 24 146 27 36 23 38 36 40 49 36 17 20 36 47 10 -0.98 136 0 0 36 4 22 5 40 12.2 25 147 26 35 55 49 36 12 57 35 49 32 36 19 17 -0.98 137 0 0 35 36 46 5 40 14.9 26 148 26 35 28 14 35 45 18 35 21 59 35 51 37 -0.98 138 0 0 35 9 24 5 40 17.6 26 149 26 35 0 54 35 17 55 34 54 40 35 24 12 -0.98 139 0 0 34 42 17 5 40 20.4 27 150 25 34 33 50 34 50 47 34 27 36 34 57 3 -0.98 140 0 0 34 15 28 5 40 23.3 28 150 25 34 7 1 34 23 55 34 0 49 34 30 10 -0.98 141 0 0 33 48 55 5 40 26.3 29 151 24 33 40 31 33 57 21 33 34 20 34 3 35 -0.98 142 0 0 33 22 41 5 40 29.3 30 152 24 33 14 19 33 31 5 33 8 9 33 37 18 -0.98 143 0 0 32 56 45 5 40 32.5 30 153 23 32 48 24 33 5 8 32 42 16 33 11 19 -0.98 144 0 0 32 31 9 5 40 35.7 31 154 23 32 22 50 32 39 30 32 16 43 32 45 40 -0.99 145 0 0 32 5 54 5 40 39.0 32 155 22 31 57 37 32 14 13 31 51 31 32 20 21 -0.99 146 0 0 31 41 0 5 40 42.4 33 156 22 31 32 44 31 49 17 31 26 40 31 55 24 -0.99 147 0 0 31 16 28 5 40 45.8 33 157 21 31 8 14 31 24 44 31 2 11 31 30 49 -0.99 148 0 0 30 52 19 5 40 49.3 34 158 21 30 44 7 31 0 33 30 38 5 31 6 37 -0.99 149 0 0 30 28 34 5 40 52.9 35 158 20 30 20 23 30 36 45 30 14 22 30 42 49 -0.99 150 0 0 30 5 12 5 40 56.5 35 159 20 29 57 3 30 13 22 29 51 4 30 19 24 -0.99 151 0 0 29 42 15 5 41 0.2 36 160 19 29 34 8 29 50 24 29 28 10 29 56 24 -0.99 152 0 0 29 19 44 5 41 4.0 37 162 18 29 11 38 29 27 50 29 5 41 29 33 50 -0.99 153 0 0 28 57 38 5 41 7.8 37 163 18 28 49 34 29 5 43 28 43 38 29 11 42 -0.99 154 0 0 28 35 59 5 41 11.7 38 164 17 28 27 57 28 44 3 28 22 2 28 50 0 -0.99 155 0 0 28 14 47 5 41 15.6 39 165 16 28 6 46 28 22 49 28 0 53 28 28 45 -1.00 156 0 0 27 54 3 5 41 19.6 39 166 16 27 46 3 28 2 3 27 40 11 28 7 58 -1.00 157 0 0 27 33 46 5 41 23.6 40 167 15 27 25 49 27 41 45 27 19 57 27 47 39 -1.00 158 0 0 27 13 59 5 41 27.7 40 168 14 27 6 2 27 21 56 27 0 12 27 27 49 -1.00 159 0 0 26 54 40 5 41 31.8 41 169 13 26 46 45 27 2 36 26 40 56 27 8 27 -1.00 160 0 0 26 35 51 5 41 35.9 41 170 13 26 27 57 26 43 45 26 22 9 26 49 36 -1.00 161 0 0 26 17 32 5 41 40.1 42 172 12 26 9 40 26 25 25 26 3 52 26 31 14 -1.00 162 0 0 25 59 43 5 41 44.4 42 173 11 25 51 52 26 7 34 25 46 6 26 13 23 -1.00 163 0 0 25 42 24 5 41 48.6 42 174 10 25 34 35 25 50 15 25 28 50 25 56 2 -1.00 164 0 0 25 25 37 5 41 52.9 43 175 10 25 17 49 25 33 26 25 12 5 25 39 13 -1.00 165 0 0 25 9 21 5 41 57.2 43 177 9 25 1 34 25 17 9 24 55 51 25 22 54 -1.00 166 0 0 24 53 37 5 42 1.5 43 178 8 24 45 51 25 1 24 24 40 9 25 7 8 -1.00 167 0 0 24 38 25 5 42 5.9 44 179 7 24 30 40 24 46 10 24 24 59 24 51 54 -1.00 168 0 0 24 23 45 5 42 10.3 44 181 6 24 16 2 24 31 29 24 10 21 24 37 12 -1.00 169 0 0 24 9 37 5 42 14.7 44 182 6 24 1 55 24 17 21 23 56 15 24 23 2 -1.00 170 0 0 23 56 3 5 42 19.1 44 183 5 23 48 22 24 3 45 23 42 43 24 9 26 -1.01 171 0 0 23 43 1 5 42 23.5 44 185 4 23 35 21 23 50 42 23 29 43 23 56 23 -1.01 172 0 0 23 30 33 5 42 27.9 45 186 3 23 22 54 23 38 13 23 17 16 23 43 53 -1.01 173 0 0 23 18 38 5 42 32.3 45 187 2 23 11 0 23 26 17 23 5 23 23 31 56 -1.01 174 0 0 23 7 17 5 42 36.8 45 189 1 22 59 40 23 14 55 22 54 4 23 20 33 -1.01 175 0 0 22 56 30 5 42 41.2 45 190 0 22 48 53 23 4 7 22 43 18 23 9 45 -1.01 176 0 0 22 46 16 5 42 45.6 45 191 0 22 38 41 22 53 53 22 33 6 22 59 30 -1.01 177 0 0 22 36 37 5 42 50.1 45 193 -1 22 29 2 22 44 13 22 23 28 22 49 49 -1.01 178 0 0 22 27 32 5 42 54.5 45 194 -2 22 19 58 22 35 7 22 14 24 22 40 43 -1.01 179 0 0 22 19 2 5 42 58.9 45 195 -3 22 11 28 22 26 36 22 5 55 22 32 11 -1.01 180 0 0 22 11 6 5 43 3.3 44 197 -4 22 3 33 22 18 39 21 58 0 22 24 14 -1.01 -179 0 0 22 3 45 5 43 7.7 44 198 -5 21 56 13 22 11 18 21 50 40 22 16 52 -1.01 -178 0 0 21 56 58 5 43 12.1 44 199 -6 21 49 27 22 4 31 21 43 55 22 10 5 -1.01 -177 0 0 21 50 46 5 43 16.4 44 200 -7 21 43 15 21 58 18 21 37 44 22 3 52 -1.01 -176 0 0 21 45 10 5 43 20.8 44 202 -8 21 37 39 21 52 41 21 32 8 21 58 14 -1.01 -175 0 0 21 40 8 5 43 25.1 43 203 -9 21 32 38 21 47 39 21 27 7 21 53 12 -1.01 -174 0 0 21 35 41 5 43 29.3 43 204 -10 21 28 11 21 43 12 21 22 40 21 48 44 -1.01 -173 0 0 21 31 49 5 43 33.6 43 205 -10 21 24 20 21 39 20 21 18 49 21 44 52 -1.01 -172 0 0 21 28 33 5 43 37.8 42 207 -11 21 21 4 21 36 3 21 15 33 21 41 35 -1.01 -171 0 0 21 25 51 5 43 42.0 42 208 -12 21 18 22 21 33 21 21 12 52 21 38 53 -1.01 -170 0 0 21 23 45 5 43 46.2 42 209 -13 21 16 16 21 31 14 21 10 46 21 36 46 -1.01 -169 0 0 21 22 14 5 43 50.3 41 210 -14 21 14 45 21 29 43 21 9 15 21 35 15 -1.01 -168 0 0 21 21 18 5 43 54.4 41 211 -15 21 13 49 21 28 47 21 8 19 21 34 19 -1.01 -167 0 0 21 20 57 5 43 58.4 40 212 -16 21 13 29 21 28 26 21 7 59 21 33 58 -1.01 -166 0 0 21 21 11 5 44 2.4 40 213 -17 21 13 43 21 28 41 21 8 13 21 34 12 -1.01 -165 0 0 21 22 1 5 44 6.4 39 214 -18 21 14 32 21 29 30 21 9 3 21 35 2 -1.01 -164 0 0 21 23 25 5 44 10.3 39 215 -19 21 15 57 21 30 55 21 10 27 21 36 27 -1.01 -163 0 0 21 25 25 5 44 14.2 38 216 -20 21 17 57 21 32 55 21 12 27 21 38 27 -1.01 -162 0 0 21 28 0 5 44 18.0 37 217 -21 21 20 31 21 35 30 21 15 1 21 41 2 -1.01 -161 0 0 21 31 10 5 44 21.7 37 218 -22 21 23 41 21 38 40 21 18 10 21 44 12 -1.01 -160 0 0 21 34 54 5 44 25.5 36 219 -23 21 27 25 21 42 24 21 21 54 21 47 57 -1.01 -159 0 0 21 39 13 5 44 29.1 35 220 -24 21 31 44 21 46 44 21 26 13 21 52 17 -1.01 -158 0 0 21 44 8 5 44 32.7 35 220 -25 21 36 38 21 51 39 21 31 7 21 57 12 -1.01 -157 0 0 21 49 37 5 44 36.2 34 221 -26 21 42 6 21 57 8 21 36 35 22 2 41 -1.01 -156 0 0 21 55 40 5 44 39.7 33 222 -26 21 48 9 22 3 12 21 42 37 22 8 45 -1.01 -155 0 0 22 2 18 5 44 43.1 33 223 -27 21 54 46 22 9 50 21 49 15 22 15 24 -1.01 -154 0 0 22 9 30 5 44 46.4 32 224 -28 22 1 58 22 17 3 21 56 26 22 22 37 -1.01 -153 0 0 22 17 16 5 44 49.7 31 224 -29 22 9 44 22 24 50 22 4 11 22 30 25 -1.01 -152 0 0 22 25 37 5 44 52.9 30 225 -30 22 18 4 22 33 11 22 12 31 22 38 46 -1.01 -151 0 0 22 34 31 5 44 56.0 30 226 -31 22 26 57 22 42 6 22 21 24 22 47 42 -1.01 -150 0 0 22 43 59 5 44 59.1 29 226 -32 22 36 25 22 51 35 22 30 51 22 57 11 -1.01 -149 0 0 22 54 1 5 45 2.0 28 227 -33 22 46 26 23 1 37 22 40 51 23 7 14 -1.01 -148 0 0 23 4 36 5 45 5.0 27 228 -34 22 57 0 23 12 13 22 51 25 23 17 51 -1.01 -147 0 0 23 15 45 5 45 7.8 26 228 -35 23 8 8 23 23 23 23 2 32 23 29 1 -1.01 -146 0 0 23 27 26 5 45 10.5 26 229 -36 23 19 49 23 35 5 23 14 12 23 40 44 -1.01 -145 0 0 23 39 41 5 45 13.2 25 230 -37 23 32 2 23 47 20 23 26 25 23 53 0 -1.01 -144 0 0 23 52 27 5 45 15.8 24 230 -38 23 44 48 24 0 8 23 39 10 24 5 48 -1.02 -143 0 0 24 5 47 5 45 18.3 23 231 -39 23 58 6 24 13 28 23 52 27 24 19 9 -1.02 -142 0 0 24 19 38 5 45 20.7 22 231 -39 24 11 56 24 27 21 24 6 17 24 33 2 -1.02 -141 0 0 24 34 1 5 45 23.0 21 232 -40 24 26 18 24 41 45 24 20 38 24 47 27 -1.02 -140 0 0 24 48 56 5 45 25.2 20 233 -41 24 41 12 24 56 41 24 35 31 25 2 24 -1.02 -139 0 0 25 4 22 5 45 27.4 20 233 -42 24 56 37 25 12 8 24 50 55 25 17 52 -1.02 -138 0 0 25 20 19 5 45 29.4 19 234 -43 25 12 33 25 28 6 25 6 50 25 33 51 -1.02 -137 0 0 25 36 46 5 45 31.4 18 234 -44 25 28 59 25 44 35 25 23 15 25 50 21 -1.02 -136 0 0 25 53 44 5 45 33.2 17 235 -45 25 45 55 26 1 34 25 40 11 26 7 21 -1.02 -135 0 0 26 11 12 5 45 35.0 16 235 -46 26 3 22 26 19 3 25 57 36 26 24 51 -1.02 -134 0 0 26 29 9 5 45 36.7 15 236 -46 26 21 18 26 37 1 26 15 31 26 42 50 -1.02 -133 0 0 26 47 35 5 45 38.3 14 236 -47 26 39 43 26 55 29 26 33 55 27 1 19 -1.02 -132 0 0 27 6 30 5 45 39.8 13 237 -48 26 58 36 27 14 26 26 52 48 27 20 17 -1.02 -131 0 0 27 25 54 5 45 41.1 12 237 -49 27 17 58 27 33 50 27 12 9 27 39 42 -1.02 -130 0 0 27 45 45 5 45 42.4 11 238 -50 27 37 48 27 53 43 27 31 57 27 59 36 -1.03 -129 0 0 28 6 4 5 45 43.6 10 238 -50 27 58 5 28 14 3 27 52 13 28 19 57 -1.03 -128 0 0 28 26 49 5 45 44.7 10 239 -51 28 18 49 28 34 50 28 12 56 28 40 46 -1.03 -127 0 0 28 48 1 5 45 45.7 9 239 -52 28 40 0 28 56 4 28 34 6 29 2 0 -1.03 -126 0 0 29 9 39 5 45 46.5 8 240 -52 29 1 36 29 17 43 28 55 41 29 23 40 -1.04 -125 0 0 29 31 42 5 45 47.3 7 240 -53 29 23 37 29 39 47 29 17 41 29 45 46 -1.04 -124 0 0 29 54 9 5 45 48.0 6 241 -54 29 46 3 30 2 17 29 40 6 30 8 17 -1.05 -123 0 0 30 17 1 5 45 48.5 5 241 -54 30 8 54 30 25 10 30 2 55 30 31 12 -1.06 -122 0 0 30 40 17 5 45 49.0 4 242 -55 30 32 7 30 48 27 30 26 8 30 54 30 -1.07 -121 0 0 31 3 55 5 45 49.4 3 242 -56 30 55 44 31 12 8 30 49 43 31 18 11 -1.09 -120 0 0 31 27 56 5 45 49.6 2 243 -56 31 19 43 31 36 10 31 13 41 31 42 15 -1.14 -119 0 0 31 52 18 5 45 49.8 1 243 -57 31 44 4 32 0 34 31 38 0 32 6 40 -1.26 -118 0 0 32 17 1 5 45 49.8 0 244 -57 32 8 45 32 25 19 32 2 41 .. .. .. -3.83 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 341-178541 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 59 30.0462 DE: -21 48 50.431 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 59 30.0462 DE: -21 48 50.431 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.7 * B mag [mag]: 11.9 * Diameter [mas]: 0.20 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (49513) 1999 CK28 asteroid class: approx. diameter [km]: 19 approx. diameter ["]: 0.008 distance from Earth [AU]: 3.34740 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#50 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): 0.021", 0.001", 107.483° remarks: * orbital elements for (49513)1999 CK28 : Mean anomaly = 269.6383141299 deg Arg. of pericenter = 276.5776506904 deg Long. of node = 123.3776402312 deg Inclination = 22.5363568195 deg Eccentricity = 0.0762728621 Semimajor axis = 3.1953879760 AU Perihelion dist = 2.9516665895 AU Mag: H = 12.85, G = 0.15 Epoch of elements : MJD 60606.23799067 TDT (2024 Oct 23.2380) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#502023Apr25,0.81,2024,10,23,5.711783,0.125775,0.697822,13.309691,-2.406761,0.005641,0.000616,0.000000,0.000000 167.4292,-21.7808,90.40,-11.58,False UCAC4 341-178541,18.99167954,-21.8140086,11.94,10.72,10.06,0.2,0,,19.01627337,-21.7807616,8.20,8.41,0,0,0 49513,1999 CK28,18.92,19.417,3.3474,0,0,2.511,-6.32,,1.8,0 0,269.5972,2024,10,23,276.5777,123.3776,22.5364,0.07627,3.19539,2.95167,12.85,5.0,0.15 1.368,0.0207,0.0014,107,0.0029,Known errors,0.92,0,-1,-1 20241023_178541,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:41 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org