IOTA/IOTA-ES occultation update for (43) Ariadne / UCAC4 347-143406 event on 2024 Oct 13, 16:38 UT Visible from Summary ------- On 2024 Oct 13 UT, the 60.835 km diameter asteroid (43) Ariadne 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 1.02 mag to 11.96 mag (the magnitude of the asteroid) for at most 2.170 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: 100 * date and approx. time of event: 2024 Oct 13, 16:36 - 2024 Oct 13, 16:40 * geocentric midpoint of event [JD]: 2460597.19322104 * magnitude of target star: 11.47 * magnitude drop [mag]: 1.02 * estimated maximum duration [s]: 2.170 * Moon: 81 % sunlit, 51° distance * Sun: 77° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 120 * 1 sigma uncertainty interval [path widths]: +/- 0.04 * 1 sigma uncertainty interval [seconds]: +/- 1.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.023, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.023", 0.001", 82°) * approx speed of asteroid's shadow [km/s]: 27.9738 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 347-143406 by 43 Ariadne on 2024 Oct 13 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 - 56 0 0 50 49 37 16 36 19.4 0 124 29 50 10 50 .. .. .. 50 7 32 .. .. .. .... - 55 0 0 50 24 1 16 36 19.5 1 125 30 49 45 28 51 3 29 49 42 10 51 6 56 -0.45 - 54 0 0 49 58 42 16 36 19.6 2 125 30 49 20 23 50 37 55 49 17 7 50 41 21 -1.08 - 53 0 0 49 33 42 16 36 19.8 2 126 30 48 55 37 50 12 40 48 52 21 50 16 5 -1.29 - 52 0 0 49 9 1 16 36 20.1 3 127 30 48 31 9 49 47 44 48 27 54 49 51 8 -1.39 - 51 0 0 48 44 39 16 36 20.4 4 128 30 48 7 1 49 23 8 48 3 47 49 26 31 -1.45 - 50 0 0 48 20 39 16 36 20.8 5 128 30 47 43 13 48 58 54 47 40 1 49 2 15 -1.50 - 49 0 0 47 57 0 16 36 21.4 5 129 30 47 19 47 48 35 1 47 16 36 48 38 21 -1.53 - 48 0 0 47 33 43 16 36 22.0 6 130 30 46 56 43 48 11 31 46 53 33 48 14 50 -1.55 - 47 0 0 47 10 49 16 36 22.7 7 131 30 46 34 1 47 48 24 46 30 52 47 51 42 -1.57 - 46 0 0 46 48 19 16 36 23.4 8 131 30 46 11 44 47 25 41 46 8 36 47 28 57 -1.58 - 45 0 0 46 26 14 16 36 24.3 8 132 30 45 49 50 47 3 23 45 46 43 47 6 38 -1.59 - 44 0 0 46 4 33 16 36 25.2 9 133 30 45 28 21 46 41 30 45 25 15 46 44 44 -1.60 - 43 0 0 45 43 19 16 36 26.3 10 134 30 45 7 18 46 20 3 45 4 13 46 23 16 -1.61 - 42 0 0 45 22 30 16 36 27.4 11 134 30 44 46 41 45 59 3 44 43 37 46 2 15 -1.62 - 41 0 0 45 2 9 16 36 28.5 11 135 30 44 26 30 45 38 30 44 23 27 45 41 41 -1.63 - 40 0 0 44 42 15 16 36 29.8 12 136 30 44 6 46 45 18 25 44 3 44 45 21 35 -1.63 - 39 0 0 44 22 49 16 36 31.1 13 137 29 43 47 31 44 58 48 43 44 29 45 1 57 -1.64 - 38 0 0 44 3 51 16 36 32.6 14 138 29 43 28 43 44 39 40 43 25 42 44 42 48 -1.64 - 37 0 0 43 45 22 16 36 34.1 14 138 29 43 10 24 44 21 1 43 7 24 44 24 8 -1.65 - 36 0 0 43 27 23 16 36 35.6 15 139 29 42 52 34 44 2 52 42 49 35 44 5 58 -1.65 - 35 0 0 43 9 54 16 36 37.3 16 140 28 42 35 14 43 45 13 42 32 16 43 48 19 -1.65 - 34 0 0 42 52 56 16 36 39.0 16 141 28 42 18 25 43 28 5 42 15 27 43 31 10 -1.66 - 33 0 0 42 36 28 16 36 40.8 17 142 28 42 2 5 43 11 28 41 59 8 43 14 32 -1.66 - 32 0 0 42 20 31 16 36 42.6 18 142 27 41 46 17 42 55 23 41 43 20 42 58 26 -1.66 - 31 0 0 42 5 6 16 36 44.6 18 143 27 41 30 59 42 39 49 41 28 4 42 42 51 -1.66 - 30 0 0 41 50 12 16 36 46.6 19 144 27 41 16 14 42 24 48 41 13 19 42 27 49 -1.67 - 29 0 0 41 35 51 16 36 48.6 20 145 26 41 2 0 42 10 19 40 59 6 42 13 20 -1.67 - 28 0 0 41 22 3 16 36 50.8 20 146 26 40 48 18 41 56 23 40 45 25 41 59 23 -1.67 - 27 0 0 41 8 47 16 36 53.0 21 147 25 40 35 10 41 43 1 40 32 17 41 46 0 -1.67 - 26 0 0 40 56 5 16 36 55.2 22 147 25 40 22 34 41 30 11 40 19 41 41 33 10 -1.68 - 25 0 0 40 43 56 16 36 57.5 22 148 24 40 10 31 41 17 56 40 7 39 41 20 54 -1.68 - 24 0 0 40 32 21 16 36 59.9 23 149 24 39 59 2 41 6 15 39 56 10 41 9 12 -1.68 - 23 0 0 40 21 20 16 37 2.3 23 150 23 39 48 6 40 55 8 39 45 15 40 58 5 -1.68 - 22 0 0 40 10 53 16 37 4.8 24 151 23 39 37 44 40 44 35 39 34 54 40 47 32 -1.68 - 21 0 0 40 1 0 16 37 7.3 24 152 22 39 27 57 40 34 37 39 25 6 40 37 33 -1.69 - 20 0 0 39 51 42 16 37 9.9 25 153 22 39 18 43 40 25 14 39 15 53 40 28 10 -1.69 - 19 0 0 39 42 58 16 37 12.6 25 154 21 39 10 4 40 16 26 39 7 15 40 19 22 -1.69 - 18 0 0 39 34 50 16 37 15.2 26 155 21 39 1 59 40 8 14 38 59 10 40 11 9 -1.69 - 17 0 0 39 27 16 16 37 18.0 26 156 20 38 54 30 40 0 36 38 51 41 40 3 31 -1.69 - 16 0 0 39 20 18 16 37 20.7 27 157 19 38 47 35 39 53 34 38 44 47 39 56 29 -1.69 - 15 0 0 39 13 56 16 37 23.5 27 158 19 38 41 15 39 47 8 38 38 27 39 50 2 -1.69 - 14 0 0 39 8 8 16 37 26.4 27 159 18 38 35 31 39 41 18 38 32 43 39 44 12 -1.69 - 13 0 0 39 2 56 16 37 29.2 28 160 17 38 30 22 39 36 4 38 27 34 39 38 57 -1.70 - 12 0 0 38 58 21 16 37 32.2 28 161 17 38 25 48 39 31 25 38 23 0 39 34 19 -1.70 - 11 0 0 38 54 20 16 37 35.1 28 162 16 38 21 50 39 27 23 38 19 2 39 30 16 -1.70 - 10 0 0 38 50 56 16 37 38.1 29 163 15 38 18 27 39 23 57 38 15 40 39 26 50 -1.70 - 9 0 0 38 48 7 16 37 41.1 29 164 15 38 15 40 39 21 7 38 12 52 39 24 0 -1.70 - 8 0 0 38 45 55 16 37 44.1 29 165 14 38 13 28 39 18 53 38 10 41 39 21 46 -1.70 - 7 0 0 38 44 18 16 37 47.2 29 166 13 38 11 53 39 17 16 38 9 6 39 20 9 -1.70 - 6 0 0 38 43 18 16 37 50.2 30 167 12 38 10 53 39 16 15 38 8 6 39 19 8 -1.70 - 5 0 0 38 42 54 16 37 53.3 30 168 12 38 10 29 39 15 51 38 7 42 39 18 44 -1.70 - 4 0 0 38 43 6 16 37 56.4 30 169 11 38 10 41 39 16 3 38 7 54 39 18 56 -1.70 - 3 0 0 38 43 54 16 37 59.5 30 170 10 38 11 28 39 16 52 38 8 41 39 19 45 -1.71 - 2 0 0 38 45 18 16 38 2.7 30 171 9 38 12 52 39 18 17 38 10 5 39 21 10 -1.71 - 1 0 0 38 47 19 16 38 5.8 30 172 9 38 14 51 39 20 18 38 12 4 39 23 11 -1.71 0 0 0 38 49 55 16 38 9.0 30 173 8 38 17 26 39 22 56 38 14 39 39 25 49 -1.71 1 0 0 38 53 8 16 38 12.1 30 175 7 38 20 37 39 26 10 38 17 50 39 29 4 -1.71 2 0 0 38 56 56 16 38 15.3 30 176 6 38 24 23 39 30 1 38 21 36 39 32 54 -1.71 3 0 0 39 1 20 16 38 18.4 30 177 6 38 28 46 39 34 27 38 25 58 39 37 21 -1.71 4 0 0 39 6 21 16 38 21.6 30 178 5 38 33 43 39 39 30 38 30 55 39 42 24 -1.71 5 0 0 39 11 57 16 38 24.7 30 179 4 38 39 16 39 45 9 38 36 28 39 48 3 -1.71 6 0 0 39 18 8 16 38 27.8 30 180 3 38 45 25 39 51 24 38 42 36 39 54 19 -1.71 7 0 0 39 24 55 16 38 31.0 30 181 2 38 52 9 39 58 15 38 49 20 40 1 10 -1.71 8 0 0 39 32 18 16 38 34.1 30 182 2 38 59 27 40 5 41 38 56 38 40 8 36 -1.71 9 0 0 39 40 16 16 38 37.2 30 183 1 39 7 21 40 13 43 39 4 32 40 16 39 -1.71 10 0 0 39 48 49 16 38 40.2 29 184 0 39 15 50 40 22 21 39 13 0 40 25 17 -1.71 11 0 0 39 57 57 16 38 43.3 29 185 -1 39 24 53 40 31 34 39 22 3 40 34 30 -1.71 12 0 0 40 7 40 16 38 46.4 29 187 -2 39 34 31 40 41 22 39 31 41 40 44 19 -1.71 13 0 0 40 17 57 16 38 49.4 29 188 -2 39 44 44 40 51 45 39 41 53 40 54 42 -1.71 14 0 0 40 28 49 16 38 52.4 28 189 -3 39 55 30 41 2 43 39 52 38 41 5 41 -1.71 15 0 0 40 40 15 16 38 55.3 28 190 -4 40 6 50 41 14 15 40 3 58 41 17 14 -1.71 16 0 0 40 52 15 16 38 58.3 28 191 -5 40 18 44 41 26 22 40 15 52 41 29 21 -1.71 17 0 0 41 4 50 16 39 1.2 27 192 -5 40 31 12 41 39 3 40 28 19 41 42 2 -1.71 18 0 0 41 17 57 16 39 4.0 27 193 -6 40 44 13 41 52 18 40 41 19 41 55 18 -1.71 19 0 0 41 31 38 16 39 6.8 27 194 -7 40 57 47 42 6 6 40 54 53 42 9 7 -1.71 20 0 0 41 45 52 16 39 9.6 26 195 -8 41 11 53 42 20 27 41 8 58 42 23 29 -1.72 21 0 0 42 0 38 16 39 12.4 26 196 -9 41 26 31 42 35 21 41 23 36 42 38 24 -1.72 22 0 0 42 15 56 16 39 15.1 25 197 -9 41 41 42 42 50 48 41 38 46 42 53 51 -1.72 23 0 0 42 31 47 16 39 17.7 25 198 -10 41 57 24 43 6 48 41 54 27 43 9 51 -1.72 24 0 0 42 48 9 16 39 20.3 24 199 -11 42 13 38 43 23 19 42 10 40 43 26 23 -1.72 25 0 0 43 5 2 16 39 22.9 24 200 -12 42 30 22 43 40 22 42 27 24 43 43 27 -1.72 26 0 0 43 22 27 16 39 25.4 23 201 -12 42 47 37 43 57 56 42 44 38 44 1 2 -1.72 27 0 0 43 40 21 16 39 27.8 23 202 -13 43 5 22 44 16 0 43 2 23 44 19 7 -1.72 28 0 0 43 58 46 16 39 30.2 22 203 -14 43 23 37 44 34 35 43 20 37 44 37 43 -1.72 29 0 0 44 17 40 16 39 32.6 22 203 -14 43 42 21 44 53 39 43 39 20 44 56 48 -1.72 30 0 0 44 37 2 16 39 34.8 21 204 -15 44 1 34 45 13 13 43 58 31 45 16 23 -1.72 31 0 0 44 56 54 16 39 37.0 21 205 -16 44 21 14 45 33 16 44 18 11 45 36 27 -1.72 32 0 0 45 17 13 16 39 39.2 20 206 -17 44 41 23 45 53 47 44 38 19 45 56 59 -1.72 33 0 0 45 38 0 16 39 41.3 19 207 -17 45 1 58 46 14 45 44 58 53 46 17 58 -1.72 34 0 0 45 59 13 16 39 43.3 19 208 -18 45 23 0 46 36 10 45 19 54 46 39 24 -1.72 35 0 0 46 20 52 16 39 45.2 18 209 -19 45 44 28 46 58 2 45 41 21 47 1 17 -1.72 36 0 0 46 42 57 16 39 47.1 17 210 -19 46 6 21 47 20 20 46 3 13 47 23 36 -1.72 37 0 0 47 5 27 16 39 48.9 17 211 -20 46 28 39 47 43 3 46 25 30 47 46 20 -1.72 38 0 0 47 28 21 16 39 50.6 16 211 -20 46 51 20 48 6 10 46 48 10 48 9 29 -1.72 39 0 0 47 51 38 16 39 52.3 15 212 -21 47 14 25 48 29 41 47 11 14 48 33 1 -1.72 40 0 0 48 15 18 16 39 53.9 15 213 -22 47 37 52 48 53 35 47 34 40 48 56 56 -1.72 41 0 0 48 39 21 16 39 55.4 14 214 -22 48 1 41 49 17 51 47 58 28 49 21 13 -1.73 42 0 0 49 3 44 16 39 56.8 13 215 -23 48 25 51 49 42 28 48 22 37 49 45 52 -1.73 43 0 0 49 28 27 16 39 58.1 12 216 -23 48 50 21 50 7 26 48 47 5 50 10 51 -1.73 44 0 0 49 53 31 16 39 59.4 12 216 -24 49 15 10 50 32 44 49 11 54 50 36 11 -1.73 45 0 0 50 18 52 16 40 0.6 11 217 -24 49 40 18 50 58 21 49 37 1 51 1 49 -1.73 46 0 0 50 44 32 16 40 1.7 10 218 -25 50 5 44 51 24 15 50 2 25 51 27 44 -1.73 47 0 0 51 10 28 16 40 2.7 10 219 -25 50 31 26 51 50 27 50 28 6 51 53 57 -1.74 48 0 0 51 36 40 16 40 3.7 9 220 -26 50 57 24 52 16 54 50 54 2 52 20 26 -1.74 49 0 0 52 3 7 16 40 4.6 8 221 -26 51 23 36 52 43 37 51 20 14 52 47 10 -1.74 50 0 0 52 29 48 16 40 5.4 7 221 -26 51 50 3 53 10 34 51 46 39 53 14 8 -1.75 51 0 0 52 56 42 16 40 6.1 7 222 -27 52 16 42 53 37 43 52 13 17 53 41 19 -1.75 52 0 0 53 23 47 16 40 6.7 6 223 -27 52 43 33 54 5 5 52 40 7 54 8 42 -1.76 53 0 0 53 51 4 16 40 7.3 5 224 -28 53 10 34 54 32 37 53 7 7 54 36 16 -1.76 54 0 0 54 18 30 16 40 7.8 4 225 -28 53 37 46 55 0 19 53 34 17 55 4 0 -1.77 55 0 0 54 46 5 16 40 8.2 4 225 -28 54 5 6 55 28 10 54 1 36 55 31 52 -1.79 56 0 0 55 13 47 16 40 8.5 3 226 -28 54 32 34 55 56 8 54 29 3 55 59 51 -1.81 57 0 0 55 41 36 16 40 8.7 2 227 -29 55 0 8 56 24 12 54 56 35 56 27 57 -1.84 58 0 0 56 9 29 16 40 8.9 1 228 -29 55 27 47 56 52 22 55 24 13 56 56 8 -1.91 59 0 0 56 37 27 16 40 9.0 1 229 -29 55 55 30 57 20 35 55 51 55 57 24 23 -2.11 60 0 0 57 5 28 16 40 9.0 0 230 -29 56 23 16 .. .. .. 56 19 40 .. .. .. -20.03 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 347-143406 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 31 50.7071 DE: -20 44 59.429 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 31 50.7070 DE: -20 44 59.429 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.5 * B mag [mag]: 11.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (43) Ariadne asteroid class: approx. diameter [km]: 61 approx. diameter ["]: 0.046 distance from Earth [AU]: 1.81510 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#134 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): 0.023", 0.001", 82.454° remarks: * orbital elements for (43)Ariadne : Mean anomaly = 19.9339156280 deg Arg. of pericenter = 16.1277580511 deg Long. of node = 264.7470177777 deg Inclination = 3.4706895402 deg Eccentricity = 0.1684734321 Semimajor axis = 2.2031354936 AU Perihelion dist = 1.8319656956 AU Mag: H = 7.98, G = 0.11 Epoch of elements : MJD 60596.69322075 TDT (2024 Oct 13.6932) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1342023Apr24,2.17,2024,10,13,16.637305,-0.058964,0.859475,15.752267,1.079398,0.004954,0.000339,-0.000001,0.000000 6.0385,-20.7328,-73.04,-8.14,False UCAC4 347-143406,18.53075202,-20.7498413,11.78,11.47,11.30,0.0,0,,18.55523000,-20.7327945,1.02,0.86,0,0,0 43,Ariadne,11.96,60.835,1.8151,0,0,5.440,5.23,,3.6,0 0,19.7250,2024,10,13,16.1278,264.7470,3.4707,0.16847,2.20314,1.83197,7.97,5.0,0.15 1.043,0.0230,0.0014,82,0.0020,Known errors,0.62,0,-1,-1 20241013_143406,60140.63 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:08 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org