IOTA/IOTA-ES occultation update for (25748) 2000 AP243 / UCAC4 345-113941 event on 2024 Sep 29, 03:42 UT Visible from Summary ------- On 2024 Sep 29 UT, the 14.5213449649398 km diameter asteroid (25748) 2000 AP243 will occult a 12.0 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 6.95 mag to 18.92 mag (the magnitude of the asteroid) for at most 0.690 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 Sep 29, 03:39 - 2024 Sep 29, 03:45 * geocentric midpoint of event [JD]: 2460582.65454734 * magnitude of target star: 11.97 * magnitude drop [mag]: 6.95 * estimated maximum duration [s]: 0.690 * Moon: 11 % sunlit, 118° distance * Sun: 80° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 28 * 1 sigma uncertainty interval [path widths]: +/- 0.31 * 1 sigma uncertainty interval [seconds]: +/- 1.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.017", 0.002", 100°) * approx speed of asteroid's shadow [km/s]: 21.3228 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 345-113941 by 25748 2000 AP243 on 2024 Sep 29 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 157 0 0 60 38 48 3 39 57.7 0 138 21 60 27 31 60 50 11 60 20 32 60 57 18 .... 158 0 0 60 6 14 3 39 57.8 1 139 22 59 55 1 60 17 32 59 48 5 60 24 37 -0.79 159 0 0 59 33 31 3 39 58.0 2 140 22 59 22 22 59 44 44 59 15 28 59 51 46 -1.13 160 0 0 59 0 40 3 39 58.3 3 141 22 58 49 35 59 11 49 58 42 45 59 18 48 -1.27 161 0 0 58 27 42 3 39 58.6 3 142 22 58 16 43 58 38 47 58 9 55 58 45 43 -1.35 162 0 0 57 54 41 3 39 59.1 4 142 22 57 43 46 58 5 41 57 37 1 58 12 34 -1.40 163 0 0 57 21 37 3 39 59.7 5 143 22 57 10 47 57 32 32 57 4 5 57 39 22 -1.44 164 0 0 56 48 33 3 40 0.4 6 144 22 56 37 47 56 59 23 56 31 8 57 6 10 -1.46 165 0 0 56 15 28 3 40 1.2 6 145 22 56 4 48 56 26 13 55 58 11 56 32 57 -1.48 166 0 0 55 42 26 3 40 2.1 7 146 22 55 31 50 55 53 6 55 25 17 55 59 47 -1.50 167 0 0 55 9 27 3 40 3.2 8 147 22 54 58 56 55 20 2 54 52 26 55 26 40 -1.51 168 0 0 54 36 34 3 40 4.3 9 148 22 54 26 8 54 47 4 54 19 40 54 53 38 -1.52 169 0 0 54 3 47 3 40 5.6 10 148 22 53 53 26 54 14 12 53 47 2 54 20 43 -1.53 170 0 0 53 31 9 3 40 7.0 10 149 21 53 20 53 53 41 29 53 14 31 53 47 57 -1.54 171 0 0 52 58 40 3 40 8.5 11 150 21 52 48 29 53 8 55 52 42 10 53 15 20 -1.54 172 0 0 52 26 22 3 40 10.1 12 151 21 52 16 16 52 36 32 52 10 1 52 42 54 -1.55 173 0 0 51 54 17 3 40 11.8 13 152 21 51 44 16 52 4 23 51 38 3 52 10 41 -1.56 174 0 0 51 22 26 3 40 13.6 13 153 21 51 12 30 51 32 27 51 6 20 51 38 42 -1.56 175 0 0 50 50 51 3 40 15.6 14 154 20 50 40 59 51 0 46 50 34 52 51 6 59 -1.56 176 0 0 50 19 31 3 40 17.6 15 154 20 50 9 44 50 29 22 50 3 40 50 35 32 -1.57 177 0 0 49 48 30 3 40 19.8 16 155 20 49 38 47 49 58 16 49 32 46 50 4 22 -1.57 178 0 0 49 17 47 3 40 22.1 16 156 20 49 8 9 49 27 29 49 2 11 49 33 33 -1.58 179 0 0 48 47 25 3 40 24.5 17 157 19 48 37 52 48 57 2 48 31 56 49 3 3 -1.58 -180 0 0 48 17 25 3 40 27.0 18 158 19 48 7 55 48 26 57 48 2 3 48 32 55 -1.58 -179 0 0 47 47 46 3 40 29.6 18 159 19 47 38 22 47 57 14 47 32 32 48 3 9 -1.58 -178 0 0 47 18 32 3 40 32.3 19 160 18 47 9 11 47 27 55 47 3 24 47 33 48 -1.59 -177 0 0 46 49 41 3 40 35.1 20 161 18 46 40 25 46 59 1 46 34 40 47 4 50 -1.59 -176 0 0 46 21 17 3 40 38.0 21 162 17 46 12 5 46 30 32 46 6 23 46 36 19 -1.59 -175 0 0 45 53 19 3 40 41.0 21 162 17 45 44 11 46 2 30 45 38 31 46 8 14 -1.59 -174 0 0 45 25 48 3 40 44.1 22 163 16 45 16 44 45 34 55 45 11 7 45 40 37 -1.60 -173 0 0 44 58 46 3 40 47.3 22 164 16 44 49 45 45 7 49 44 44 10 45 13 28 -1.60 -172 0 0 44 32 12 3 40 50.6 23 165 15 44 23 16 44 41 11 44 17 43 44 46 48 -1.60 -171 0 0 44 6 9 3 40 53.9 24 166 15 43 57 16 44 15 4 43 51 46 44 20 39 -1.60 -170 0 0 43 40 36 3 40 57.4 24 167 14 43 31 47 43 49 27 43 26 18 43 55 0 -1.60 -169 0 0 43 15 34 3 41 0.9 25 168 14 43 6 49 43 24 22 43 1 23 43 29 52 -1.61 -168 0 0 42 51 5 3 41 4.5 25 169 13 42 42 22 42 59 49 42 36 59 43 5 17 -1.61 -167 0 0 42 27 8 3 41 8.1 26 170 12 42 18 29 42 35 49 42 13 7 42 41 15 -1.61 -166 0 0 42 3 44 3 41 11.9 26 171 12 41 55 9 42 12 22 41 49 49 42 17 46 -1.61 -165 0 0 41 40 55 3 41 15.7 27 172 11 41 32 22 41 49 30 41 27 4 41 54 51 -1.61 -164 0 0 41 18 40 3 41 19.6 27 173 10 41 10 10 41 27 11 41 4 54 41 32 31 -1.62 -163 0 0 40 56 59 3 41 23.5 28 174 10 40 48 33 41 5 28 40 43 19 41 10 46 -1.62 -162 0 0 40 35 55 3 41 27.5 28 175 9 40 27 31 40 44 21 40 22 18 40 49 37 -1.62 -161 0 0 40 15 26 3 41 31.5 29 177 8 40 7 5 40 23 49 40 1 54 40 29 3 -1.62 -160 0 0 39 55 34 3 41 35.6 29 178 8 39 47 15 40 3 54 39 42 6 40 9 7 -1.62 -159 0 0 39 36 18 3 41 39.7 29 179 7 39 28 2 39 44 36 39 22 55 39 49 47 -1.62 -158 0 0 39 17 40 3 41 43.9 30 180 6 39 9 27 39 25 55 39 4 20 39 31 5 -1.62 -157 0 0 38 59 39 3 41 48.1 30 181 5 38 51 28 39 7 52 38 46 24 39 13 0 -1.63 -156 0 0 38 42 16 3 41 52.3 30 182 5 38 34 8 38 50 27 38 29 4 38 55 33 -1.63 -155 0 0 38 25 32 3 41 56.6 30 183 4 38 17 25 38 33 40 38 12 23 38 38 45 -1.63 -154 0 0 38 9 26 3 42 0.9 31 184 3 38 1 21 38 17 32 37 56 21 38 22 36 -1.63 -153 0 0 37 53 59 3 42 5.2 31 185 2 37 45 56 38 2 3 37 40 57 38 7 5 -1.63 -152 0 0 37 39 10 3 42 9.5 31 186 2 37 31 10 37 47 13 37 26 12 37 52 14 -1.63 -151 0 0 37 25 2 3 42 13.9 31 188 1 37 17 3 37 33 2 37 12 6 37 38 2 -1.63 -150 0 0 37 11 33 3 42 18.2 31 189 0 37 3 36 37 19 31 36 58 40 37 24 30 -1.63 -149 0 0 36 58 43 3 42 22.6 31 190 -1 36 50 48 37 6 40 36 45 53 37 11 38 -1.63 -148 0 0 36 46 34 3 42 27.0 31 191 -2 36 38 40 36 54 29 36 33 46 36 59 26 -1.64 -147 0 0 36 35 5 3 42 31.4 31 192 -2 36 27 12 36 42 58 36 22 20 36 47 54 -1.64 -146 0 0 36 24 16 3 42 35.8 31 193 -3 36 16 25 36 32 8 36 11 33 36 37 3 -1.64 -145 0 0 36 14 7 3 42 40.1 31 194 -4 36 6 18 36 21 58 36 1 26 36 26 52 -1.64 -144 0 0 36 4 39 3 42 44.5 31 195 -5 35 56 51 36 12 29 35 52 0 36 17 22 -1.64 -143 0 0 35 55 52 3 42 48.9 31 196 -6 35 48 5 36 3 41 35 43 15 36 8 33 -1.64 -142 0 0 35 47 45 3 42 53.2 31 198 -6 35 39 59 35 55 33 35 35 10 36 0 25 -1.64 -141 0 0 35 40 20 3 42 57.5 31 199 -7 35 32 35 35 48 7 35 27 46 35 52 58 -1.64 -140 0 0 35 33 35 3 43 1.8 31 200 -8 35 25 51 35 41 21 35 21 3 35 46 12 -1.64 -139 0 0 35 27 32 3 43 6.1 31 201 -9 35 19 48 35 35 17 35 15 1 35 40 7 -1.64 -138 0 0 35 22 9 3 43 10.3 30 202 -10 35 14 27 35 29 54 35 9 39 35 34 44 -1.64 -137 0 0 35 17 28 3 43 14.6 30 203 -11 35 9 46 35 25 12 35 4 59 35 30 1 -1.64 -136 0 0 35 13 28 3 43 18.7 30 204 -11 35 5 46 35 21 11 35 1 0 35 26 0 -1.64 -135 0 0 35 10 9 3 43 22.9 30 205 -12 35 2 28 35 17 52 34 57 42 35 22 41 -1.64 -134 0 0 35 7 31 3 43 27.0 29 206 -13 34 59 51 35 15 14 34 55 5 35 20 2 -1.64 -133 0 0 35 5 35 3 43 31.1 29 207 -14 34 57 54 35 13 17 34 53 9 35 18 5 -1.65 -132 0 0 35 4 20 3 43 35.1 29 208 -15 34 56 39 35 12 2 34 51 54 35 16 50 -1.65 -131 0 0 35 3 46 3 43 39.0 28 209 -16 34 56 6 35 11 27 34 51 20 35 16 16 -1.65 -130 0 0 35 3 53 3 43 42.9 28 210 -16 34 56 13 35 11 35 34 51 27 35 16 23 -1.65 -129 0 0 35 4 41 3 43 46.8 27 211 -17 34 57 1 35 12 23 34 52 16 35 17 11 -1.65 -128 0 0 35 6 11 3 43 50.6 27 212 -18 34 58 31 35 13 53 34 53 45 35 18 41 -1.65 -127 0 0 35 8 22 3 43 54.3 26 213 -19 35 0 41 35 16 4 34 55 55 35 20 52 -1.65 -126 0 0 35 11 13 3 43 58.0 26 214 -20 35 3 32 35 18 56 34 58 46 35 23 44 -1.65 -125 0 0 35 14 46 3 44 1.6 25 215 -21 35 7 5 35 22 29 35 2 18 35 27 18 -1.65 -124 0 0 35 18 59 3 44 5.2 25 216 -21 35 11 18 35 26 43 35 6 31 35 31 32 -1.65 -123 0 0 35 23 54 3 44 8.6 24 216 -22 35 16 12 35 31 38 35 11 25 35 36 27 -1.65 -122 0 0 35 29 29 3 44 12.0 24 217 -23 35 21 46 35 37 13 35 16 59 35 42 3 -1.65 -121 0 0 35 35 44 3 44 15.3 23 218 -24 35 28 1 35 43 30 35 23 13 35 48 20 -1.65 -120 0 0 35 42 41 3 44 18.6 23 219 -24 35 34 56 35 50 27 35 30 8 35 55 18 -1.65 -119 0 0 35 50 17 3 44 21.7 22 220 -25 35 42 32 35 58 4 35 37 43 36 2 56 -1.65 -118 0 0 35 58 34 3 44 24.8 21 221 -26 35 50 47 36 6 22 35 45 58 36 11 14 -1.65 -117 0 0 36 7 31 3 44 27.8 21 221 -27 35 59 43 36 15 20 35 54 53 36 20 13 -1.65 -116 0 0 36 17 8 3 44 30.7 20 222 -27 36 9 19 36 24 58 36 4 28 36 29 52 -1.65 -115 0 0 36 27 24 3 44 33.5 19 223 -28 36 19 35 36 35 16 36 14 43 36 40 10 -1.65 -114 0 0 36 38 21 3 44 36.2 19 224 -29 36 30 30 36 46 14 36 25 37 36 51 9 -1.65 -113 0 0 36 49 56 3 44 38.8 18 224 -30 36 42 4 36 57 51 36 37 11 37 2 47 -1.65 -112 0 0 37 2 11 3 44 41.3 17 225 -30 36 54 17 37 10 7 36 49 23 37 15 4 -1.65 -111 0 0 37 15 5 3 44 43.7 16 226 -31 37 7 10 37 23 3 37 2 15 37 28 1 -1.65 -110 0 0 37 28 38 3 44 46.0 16 227 -32 37 20 41 37 36 37 37 15 45 37 41 36 -1.66 -109 0 0 37 42 49 3 44 48.2 15 227 -32 37 34 50 37 50 50 37 29 53 37 55 50 -1.66 -108 0 0 37 57 38 3 44 50.4 14 228 -33 37 49 38 38 5 41 37 44 39 38 10 43 -1.66 -107 0 0 38 13 6 3 44 52.4 13 229 -33 38 5 3 38 21 11 38 0 3 38 26 13 -1.66 -106 0 0 38 29 11 3 44 54.2 13 229 -34 38 21 6 38 37 18 38 16 5 38 42 22 -1.66 -105 0 0 38 45 54 3 44 56.0 12 230 -35 38 37 47 38 54 3 38 32 45 38 59 8 -1.66 -104 0 0 39 3 14 3 44 57.7 11 231 -35 38 55 4 39 11 25 38 50 1 39 16 32 -1.66 -103 0 0 39 21 10 3 44 59.2 10 231 -36 39 12 59 39 29 23 39 7 54 39 34 32 -1.67 -102 0 0 39 39 43 3 45 0.7 10 232 -36 39 31 29 39 47 59 39 26 23 39 53 8 -1.67 -101 0 0 39 58 51 3 45 2.0 9 233 -37 39 50 35 40 7 10 39 45 27 40 12 21 -1.67 -100 0 0 40 18 36 3 45 3.2 8 234 -37 40 10 17 40 26 57 40 5 7 40 32 10 -1.68 - 99 0 0 40 38 55 3 45 4.3 7 234 -37 40 30 33 40 47 19 40 25 22 40 52 33 -1.68 - 98 0 0 40 59 49 3 45 5.3 6 235 -38 40 51 25 41 8 15 40 46 12 41 13 32 -1.69 - 97 0 0 41 21 17 3 45 6.1 5 236 -38 41 12 50 41 29 46 41 7 35 41 35 5 -1.70 - 96 0 0 41 43 19 3 45 6.8 5 236 -39 41 34 49 41 51 51 41 29 33 41 57 11 -1.71 - 95 0 0 42 5 54 3 45 7.4 4 237 -39 41 57 21 42 14 29 41 52 3 42 19 52 -1.73 - 94 0 0 42 29 2 3 45 7.9 3 238 -39 42 20 25 42 37 40 42 15 5 42 43 4 -1.76 - 93 0 0 42 52 41 3 45 8.3 2 238 -40 42 44 2 43 1 23 42 38 40 43 6 49 -1.81 - 92 0 0 43 16 53 3 45 8.5 1 239 -40 43 8 10 43 25 38 43 2 46 43 31 6 -1.93 - 91 0 0 43 41 35 3 45 8.6 0 240 -40 43 32 48 43 50 23 43 27 22 43 55 54 -2.47 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 345-113941 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 42 41.3227 DE: -21 11 28.451 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 42 41.3226 DE: -21 11 28.451 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 12.0 * B mag [mag]: 13.0 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (25748) 2000 AP243 asteroid class: approx. diameter [km]: 15 approx. diameter ["]: 0.006 distance from Earth [AU]: 3.24920 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#49 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): 0.017", 0.002", 99.945° remarks: * orbital elements for (25748)2000 AP243 : Mean anomaly = 241.3314583225 deg Arg. of pericenter = 288.0307392218 deg Long. of node = 117.9958745928 deg Inclination = 8.8975739622 deg Eccentricity = 0.0381961081 Semimajor axis = 3.1649436314 AU Perihelion dist = 3.0440551024 AU Mag: H = 12.90, G = 0.15 Epoch of elements : MJD 60582.15454716 TDT (2024 Sep 29.1545) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#492023Apr25,0.69,2024,9,29,3.709136,0.158213,0.837095,11.825556,-2.236373,0.005758,-0.000122,0.000000,0.000000 -157.9969,-21.2036,121.93,-2.58,False UCAC4 345-113941,17.71147855,-21.1912365,12.97,11.97,11.43,0.1,0,,17.73604250,-21.2036003,6.95,7.04,0,0,0 25748,2000 AP243,18.92,14.757,3.2492,0,0,2.289,-6.05,,1.4,0 0,241.3044,2024,9,29,288.0307,117.9959,8.8976,0.03820,3.16494,3.04406,12.89,5.0,0.15 1.311,0.0167,0.0019,100,0.0019,Known errors,0.80,0,-1,-1 20240929_113941,60140.60 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:18 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org