IOTA/IOTA-ES occultation update for (1238) Predappia / UCAC4 392-057471 event on 2024 Jul 15, 11:39 UT Visible from Summary ------- On 2024 Jul 15 UT, the 20.868 km diameter asteroid (1238) Predappia will occult a 11.3 mag star in the constellation Virgo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.81 mag to 17.10 mag (the magnitude of the asteroid) for at most 1.410 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 Jul 15, 11:35 - 2024 Jul 15, 11:43 * geocentric midpoint of event [JD]: 2460506.98583500 * magnitude of target star: 11.30 * magnitude drop [mag]: 5.81 * estimated maximum duration [s]: 1.410 * Moon: 65 % sunlit, 11° distance * Sun: 97° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 41 * 1 sigma uncertainty interval [path widths]: +/- 0.22 * 1 sigma uncertainty interval [seconds]: +/- 1.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.012, +/- 0.008) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.003", 122°) * approx speed of asteroid's shadow [km/s]: 14.7835 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 392-057471 by 1238 Predappia on 2024 Jul 15 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 ' " Longitude Longitude Longitude Longitude 121 35 59 77 0 0 11 35 57.0 0 201 16 120 44 29 122 28 5 120 22 29 122 50 43 .... 120 8 39 76 0 0 11 35 57.2 1 199 15 119 21 39 120 56 8 119 1 33 121 16 44 0.98 119 1 0 75 0 0 11 35 57.7 2 198 15 118 17 39 119 44 43 117 59 7 120 3 39 1.28 118 8 49 74 0 0 11 35 58.4 3 197 15 117 28 33 118 49 25 117 11 18 119 6 59 1.40 117 29 6 73 0 0 11 35 59.4 4 197 15 116 51 25 118 7 3 116 35 17 118 23 28 1.46 116 59 34 72 0 0 11 36 0.7 5 196 14 116 24 7 117 35 15 116 8 56 117 50 41 1.50 116 38 32 71 0 0 11 36 2.2 6 196 14 116 5 1 117 12 15 115 50 40 117 26 50 1.52 116 24 40 70 0 0 11 36 4.0 7 196 14 115 52 51 116 56 40 115 39 13 117 10 30 1.54 116 16 55 69 0 0 11 36 6.0 8 196 13 115 46 36 116 47 23 115 33 36 117 0 34 1.56 116 14 26 68 0 0 11 36 8.3 9 196 13 115 45 28 116 43 34 115 33 2 116 56 10 1.57 116 16 35 67 0 0 11 36 10.8 10 196 13 115 48 48 116 44 31 115 36 52 116 56 35 -1.58 116 22 47 66 0 0 11 36 13.5 11 196 12 115 56 4 116 49 39 115 44 36 117 1 15 -1.58 116 32 37 65 0 0 11 36 16.5 12 196 12 116 6 51 116 58 30 115 55 48 117 9 41 -1.59 116 45 40 64 0 0 11 36 19.8 13 197 11 116 20 47 117 10 41 116 10 6 117 21 29 -1.59 117 1 39 63 0 0 11 36 23.3 14 197 10 116 37 33 117 25 52 116 27 13 117 36 20 -1.60 117 20 19 62 0 0 11 36 27.0 15 197 10 116 56 55 117 43 48 116 46 53 117 53 57 -1.60 117 41 26 61 0 0 11 36 31.0 16 198 9 117 18 41 118 4 16 117 8 56 118 14 8 -1.61 118 4 49 60 0 0 11 36 35.2 17 198 9 117 42 40 118 27 4 117 33 10 118 36 40 -1.61 118 30 20 59 0 0 11 36 39.6 18 199 8 118 8 44 118 52 2 117 59 27 119 1 25 -1.61 118 57 51 58 0 0 11 36 44.3 19 199 7 118 36 44 119 19 4 118 27 40 119 28 13 -1.61 119 27 16 57 0 0 11 36 49.3 19 200 6 119 6 36 119 48 1 118 57 43 119 56 59 -1.62 119 58 29 56 0 0 11 36 54.5 20 201 6 119 38 14 120 18 51 119 29 32 120 27 38 -1.62 120 31 28 55 0 0 11 36 59.9 21 202 5 120 11 34 120 51 27 120 3 2 121 0 5 -1.62 121 6 7 54 0 0 11 37 5.6 22 202 4 120 46 34 121 25 46 120 38 10 121 34 16 -1.62 121 42 26 53 0 0 11 37 11.5 23 203 3 121 23 10 122 1 47 121 14 54 122 10 9 -1.63 122 20 22 52 0 0 11 37 17.7 23 204 2 122 1 22 122 39 27 121 53 13 122 47 42 -1.63 122 59 55 51 0 0 11 37 24.1 24 205 2 122 41 9 123 18 45 122 33 6 123 26 54 -1.63 123 41 3 50 0 0 11 37 30.8 25 206 1 123 22 30 123 59 42 123 14 33 124 7 44 -1.63 124 23 48 49 0 0 11 37 37.7 26 207 0 124 5 26 124 42 16 123 57 33 124 50 14 -1.64 125 8 11 48 0 0 11 37 44.9 26 208 -1 124 49 58 125 26 29 124 42 9 125 34 24 -1.64 125 54 12 47 0 0 11 37 52.4 27 209 -2 125 36 7 126 12 23 125 28 21 126 20 15 -1.64 126 41 55 46 0 0 11 38 0.1 27 210 -3 126 23 55 127 0 0 126 16 12 127 7 49 -1.64 127 31 22 45 0 0 11 38 8.0 28 211 -4 127 13 26 127 49 23 127 5 44 127 57 11 -1.65 128 22 36 44 0 0 11 38 16.2 28 212 -6 128 4 43 128 40 36 127 57 2 128 48 22 -1.65 129 15 44 43 0 0 11 38 24.7 29 214 -7 128 57 51 129 33 43 128 50 10 129 41 29 -1.65 130 10 48 42 0 0 11 38 33.5 29 215 -8 129 52 54 130 28 49 129 45 14 130 36 36 -1.65 131 7 58 41 0 0 11 38 42.5 30 216 -9 130 50 0 131 26 2 130 42 18 131 33 50 -1.66 132 7 18 40 0 0 11 38 51.8 30 217 -10 131 49 15 132 25 28 131 41 31 132 33 19 -1.66 133 8 59 39 0 0 11 39 1.4 30 219 -12 132 50 48 133 27 16 132 43 1 133 35 11 -1.66 134 13 10 38 0 0 11 39 11.2 31 220 -13 133 54 49 134 31 39 133 46 58 134 39 38 -1.67 135 20 5 37 0 0 11 39 21.4 31 222 -14 135 1 31 135 38 47 134 53 34 135 46 52 -1.67 136 29 57 36 0 0 11 39 31.9 31 223 -16 136 11 7 136 48 56 136 3 3 136 57 9 -1.67 137 43 5 35 0 0 11 39 42.7 31 225 -17 137 23 55 138 2 24 137 15 43 138 10 46 -1.68 138 59 50 34 0 0 11 39 53.8 31 227 -19 138 40 15 139 19 34 138 31 52 139 28 8 -1.68 140 20 37 33 0 0 11 40 5.3 31 228 -20 140 0 32 140 40 53 139 51 57 140 49 40 -1.69 141 46 0 32 0 0 11 40 17.1 30 230 -22 141 25 19 142 6 54 141 16 28 142 15 58 -1.69 143 16 37 31 0 0 11 40 29.4 30 232 -23 142 55 12 143 38 17 142 46 3 143 47 41 -1.69 144 53 22 30 0 0 11 40 42.0 29 234 -25 144 31 1 145 16 0 144 21 29 145 25 49 -1.70 146 37 26 29 0 0 11 40 55.2 29 235 -27 146 13 56 147 1 17 146 3 55 147 11 39 -1.71 148 30 27 28 0 0 11 41 8.9 28 237 -29 148 5 27 148 55 51 147 54 49 149 6 56 -1.71 150 34 44 27 0 0 11 41 23.3 27 239 -31 150 7 46 151 2 15 149 56 19 151 14 17 -1.72 Latitude Latitude Latitude Latitude 151 0 0 26 48 33 11 41 26.1 26 240 -31 26 36 11 27 1 1 26 30 53 27 6 24 -1.70 152 0 0 26 22 22 11 41 32.7 26 240 -32 26 10 8 26 34 42 26 4 53 26 40 1 -1.71 153 0 0 25 57 34 11 41 39.1 25 241 -33 25 45 27 26 9 46 25 40 15 26 15 3 -1.71 154 0 0 25 34 9 11 41 45.4 25 242 -34 25 22 8 25 46 13 25 17 0 25 51 27 -1.71 155 0 0 25 12 4 11 41 51.4 24 243 -35 25 0 10 25 24 2 24 55 4 25 29 13 -1.71 156 0 0 24 51 19 11 41 57.2 23 244 -35 24 39 31 25 3 11 24 34 28 25 8 19 -1.71 157 0 0 24 31 53 11 42 2.9 23 244 -36 24 20 11 24 43 40 24 15 10 24 48 45 -1.71 158 0 0 24 13 46 11 42 8.3 22 245 -37 24 2 9 24 25 27 23 57 10 24 30 30 -1.71 159 0 0 23 56 56 11 42 13.6 21 246 -38 23 45 23 24 8 32 23 40 26 24 13 33 -1.72 160 0 0 23 41 22 11 42 18.6 20 246 -38 23 29 54 23 52 54 23 24 59 23 57 53 -1.72 161 0 0 23 27 4 11 42 23.5 20 247 -39 23 15 40 23 38 32 23 10 47 23 43 29 -1.72 162 0 0 23 14 1 11 42 28.1 19 248 -40 23 2 41 23 25 25 22 57 49 23 30 21 -1.72 163 0 0 23 2 13 11 42 32.6 18 248 -40 22 50 56 23 13 34 22 46 5 23 18 28 -1.72 164 0 0 22 51 38 11 42 36.8 17 249 -41 22 40 24 23 2 56 22 35 35 23 7 49 -1.72 165 0 0 22 42 17 11 42 40.9 16 249 -42 22 31 5 22 53 32 22 26 18 22 58 24 -1.72 166 0 0 22 34 8 11 42 44.7 16 250 -42 22 22 59 22 45 21 22 18 12 22 50 12 -1.73 167 0 0 22 27 12 11 42 48.4 15 250 -43 22 16 5 22 38 23 22 11 19 22 43 13 -1.73 168 0 0 22 21 28 11 42 51.8 14 251 -43 22 10 22 22 32 37 22 5 37 22 37 26 -1.73 169 0 0 22 16 55 11 42 55.0 13 251 -43 22 5 51 22 28 2 22 1 6 22 32 51 -1.73 170 0 0 22 13 33 11 42 58.1 12 252 -44 22 2 30 22 24 39 21 57 46 22 29 27 -1.73 171 0 0 22 11 22 11 43 0.9 11 252 -44 22 0 20 22 22 28 21 55 37 22 27 15 -1.74 172 0 0 22 10 22 11 43 3.5 10 253 -45 21 59 21 22 21 27 21 54 37 22 26 14 -1.74 173 0 0 22 10 32 11 43 5.8 10 253 -45 21 59 31 22 21 37 21 54 48 22 26 24 -1.75 174 0 0 22 11 52 11 43 8.0 9 253 -45 22 0 51 22 22 57 21 56 8 22 27 44 -1.75 175 0 0 22 14 23 11 43 10.0 8 254 -45 22 3 21 22 25 28 21 58 38 22 30 15 -1.76 176 0 0 22 18 3 11 43 11.7 7 254 -45 22 7 1 22 29 9 22 2 17 22 33 56 -1.77 177 0 0 22 22 53 11 43 13.2 6 255 -46 22 11 51 22 34 0 22 7 6 22 38 48 -1.79 178 0 0 22 28 53 11 43 14.5 5 255 -46 22 17 49 22 40 1 22 13 5 22 44 49 -1.81 179 0 0 22 36 3 11 43 15.6 4 255 -46 22 24 58 22 47 12 22 20 13 22 52 1 -1.84 180 0 0 22 44 23 11 43 16.4 3 256 -46 22 33 16 22 55 34 22 28 30 23 0 24 -1.88 -179 0 0 22 53 53 11 43 17.1 2 256 -46 22 42 44 23 5 6 22 37 57 23 9 56 -1.97 -178 0 0 23 4 33 11 43 17.5 1 257 -45 22 53 22 23 15 48 22 48 34 23 20 40 -2.20 -177 0 0 23 16 23 11 43 17.6 0 257 -45 23 5 9 23 27 41 23 0 20 23 32 34 -3.83 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 392-057471 * constellation : Virgo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 13 51 17.0691 DE: -11 46 32.155 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 13 51 17.0691 DE: -11 46 32.155 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.3 * B mag [mag]: 11.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1238) Predappia asteroid class: approx. diameter [km]: 21 approx. diameter ["]: 0.013 distance from Earth [AU]: 2.27040 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 24 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): 0.014", 0.003", 121.782° remarks: * orbital elements for (1238)Predappia : Mean anomaly = 71.3607627081 deg Arg. of pericenter = 93.8732073026 deg Long. of node = 51.6265207740 deg Inclination = 12.1551417173 deg Eccentricity = 0.1415035157 Semimajor axis = 2.6661906667 AU Perihelion dist = 2.2889153139 AU Mag: H = 12.15, G = 0.15 Epoch of elements : MJD 60506.48583534 TDT (2024 Jul 15.4858) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#502023Apr24,1.41,2024,7,15,11.660040,0.496119,0.699497,6.805507,-4.828195,0.005093,-0.001902,0.000000,0.000000 99.4301,-11.8974,6.62,21.40,False UCAC4 392-057471,13.85474144,-11.7755987,11.83,11.30,11.01,0.0,0,,13.87656334,-11.8973651,5.81,5.64,0,0,0 1238,Predappia,17.10,20.868,2.2704,0,0,1.797,-18.70,,1.4,0 0,71.2508,2024,7,15,93.8732,51.6265,12.1551,0.14150,2.66619,2.28892,12.16,5.0,0.15 1.215,0.0140,0.0026,122,0.0027,Known errors,1.17,0,-1,-1 20240715_057471,60140.20 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 04:51 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org