IOTA/IOTA-ES occultation update for (36) Atalante / UCAC4 207-173752 event on 2023 Jul 21, 02:45 UT Visible from South America, Mexico Summary ------- On 2023 Jul 21 UT, the 112.2 km diameter asteroid (36) Atalante will occult a 12.5 mag star in the constellation Telescopium for observers along a path across South America, Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.13 mag to 13.10 mag (the magnitude of the asteroid) for at most 8.470 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: 2023 Jul 21, 02:39 - 2023 Jul 21, 02:50 * geocentric midpoint of event [JD]: 2460146.61464938 * magnitude of target star: 12.45 * magnitude drop [mag]: 1.13 * estimated maximum duration [s]: 8.470 * Moon: 10 % sunlit, 125° distance * Sun: 150° distance * rough path description: South America, Mexico The occultation path -------------------- * approximate projected width [km]: 160 * 1 sigma uncertainty interval [path widths]: +/- 0.08 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.012, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.012", 0.005", 77°) * approx speed of asteroid's shadow [km/s]: 13.2534 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 207-173752 by 36 Atalante on 2023 Jul 21 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 - 98 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 31 48 27 .. .. .. 31 33 3 .... - 97 0 0 31 45 14 2 50 42.5 1 154 -15 .. .. .. 30 12 36 .. .. .. 29 57 51 .... - 96 0 0 30 9 10 2 50 41.6 3 154 -17 31 43 8 28 40 26 31 59 11 28 26 16 -0.67 - 95 0 0 28 36 59 2 50 40.2 5 155 -18 30 6 52 27 11 44 30 22 9 26 58 5 -0.81 - 94 0 0 27 8 26 2 50 38.2 7 155 -20 28 34 40 25 46 18 28 49 18 25 33 8 -0.88 - 93 0 0 25 43 17 2 50 35.6 8 156 -22 27 6 16 24 23 59 27 20 19 24 11 15 -0.92 - 92 0 0 24 21 21 2 50 32.6 10 156 -23 25 41 25 23 4 37 25 54 56 22 52 16 -0.94 - 91 0 0 23 2 27 2 50 29.1 11 157 -25 24 19 52 21 48 3 24 32 56 21 36 5 -0.96 - 90 0 0 21 46 27 2 50 25.2 13 157 -26 23 1 27 20 34 12 23 14 5 20 22 33 -0.97 - 89 0 0 20 33 13 2 50 20.9 14 157 -28 21 46 0 19 22 56 21 58 15 19 11 36 -0.98 - 88 0 0 19 22 36 2 50 16.2 16 158 -29 20 33 23 18 14 10 20 45 16 18 3 6 -0.99 - 87 0 0 18 14 32 2 50 11.2 17 158 -31 19 23 27 17 7 47 19 35 1 16 56 59 -0.99 - 86 0 0 17 8 54 2 50 6.0 19 159 -32 18 16 5 16 3 42 18 27 21 15 53 9 -1.00 - 85 0 0 16 5 35 2 50 0.4 20 159 -33 17 11 11 15 1 51 17 22 11 14 51 32 -1.00 - 84 0 0 15 4 32 2 49 54.6 21 160 -35 16 8 39 14 2 10 16 19 23 13 52 3 -1.01 - 83 0 0 14 5 40 2 49 48.6 22 160 -36 15 8 24 13 4 33 15 18 54 12 54 39 -1.01 - 82 0 0 13 8 53 2 49 42.3 24 161 -37 14 10 21 12 8 58 14 20 37 11 59 15 -1.01 - 81 0 0 12 14 9 2 49 35.9 25 161 -39 13 14 25 11 15 21 13 24 29 11 5 48 -1.01 - 80 0 0 11 21 23 2 49 29.3 26 162 -40 12 20 31 10 23 38 12 30 24 10 14 15 -1.01 - 79 0 0 10 30 32 2 49 22.5 27 162 -41 11 28 37 9 33 45 11 38 19 9 24 31 -1.01 - 78 0 0 9 41 32 2 49 15.5 28 163 -43 10 38 38 8 45 40 10 48 9 8 36 35 -1.02 - 77 0 0 8 54 20 2 49 8.4 29 163 -44 9 50 30 7 59 20 9 59 52 7 50 23 -1.02 - 76 0 0 8 8 53 2 49 1.2 30 164 -45 9 4 11 7 14 42 9 13 24 7 5 53 -1.02 - 75 0 0 7 25 9 2 48 53.9 31 164 -46 8 19 38 6 31 44 8 28 42 6 23 2 -1.02 - 74 0 0 6 43 4 2 48 46.4 32 165 -47 7 36 47 5 50 23 7 45 44 5 41 49 -1.02 - 73 0 0 6 2 36 2 48 38.9 33 165 -49 6 55 35 5 10 37 7 4 25 5 2 9 -1.02 - 72 0 0 5 23 44 2 48 31.2 34 166 -50 6 16 2 4 32 24 6 24 44 4 24 2 -1.02 - 71 0 0 4 46 25 2 48 23.5 35 167 -51 5 38 4 3 55 41 5 46 39 3 47 25 -1.02 - 70 0 0 4 10 35 2 48 15.7 35 167 -52 5 1 38 3 20 26 5 10 7 3 12 16 -1.02 - 69 0 0 3 36 15 2 48 7.9 36 168 -53 4 26 43 2 46 38 4 35 6 2 38 33 -1.02 - 68 0 0 3 3 20 2 48 0.0 37 169 -54 3 53 16 2 14 15 4 1 34 2 6 15 -1.02 - 67 0 0 2 31 51 2 47 52.0 38 169 -55 3 21 16 1 43 15 3 29 29 1 35 19 -1.02 - 66 0 0 2 1 45 2 47 44.0 38 170 -56 2 50 41 1 13 36 2 58 49 1 5 45 -1.02 - 65 0 0 1 33 0 2 47 36.0 39 171 -57 2 21 29 0 45 18 2 29 32 0 37 31 -1.02 - 64 0 0 1 5 36 2 47 27.9 40 172 -58 1 53 38 0 18 18 2 1 37 0 10 34 -1.02 - 63 0 0 0 39 30 2 47 19.8 40 172 -59 1 27 8 - 0 7 25 1 35 3 - 0 15 5 -1.02 - 62 0 0 0 14 41 2 47 11.7 41 173 -60 1 1 57 - 0 31 53 1 9 48 - 0 39 28 -1.02 - 61 0 0 - 0 8 52 2 47 3.5 41 174 -61 0 38 2 - 0 55 5 0 45 50 - 1 2 38 -1.02 - 60 0 0 - 0 31 10 2 46 55.3 42 175 -62 0 15 24 - 1 17 4 0 23 8 - 1 24 33 -1.02 - 59 0 0 - 0 52 15 2 46 47.1 42 175 -63 - 0 5 59 - 1 37 50 0 1 42 - 1 45 17 -1.02 - 58 0 0 - 1 12 6 2 46 38.9 42 176 -64 - 0 26 8 - 1 57 26 - 0 18 31 - 2 4 50 -1.02 - 57 0 0 - 1 30 47 2 46 30.7 43 177 -65 - 0 45 5 - 2 15 50 - 0 37 30 - 2 23 12 -1.02 - 56 0 0 - 1 48 17 2 46 22.5 43 178 -66 - 1 2 50 - 2 33 6 - 0 55 18 - 2 40 25 -1.02 - 55 0 0 - 2 4 37 2 46 14.3 43 179 -66 - 1 19 24 - 2 49 12 - 1 11 54 - 2 56 29 -1.02 - 54 0 0 - 2 19 48 2 46 6.1 44 180 -67 - 1 34 48 - 3 4 11 - 1 27 20 - 3 11 26 -1.02 - 53 0 0 - 2 33 50 2 45 57.8 44 181 -68 - 1 49 3 - 3 18 2 - 1 41 37 - 3 25 15 -1.02 - 52 0 0 - 2 46 46 2 45 49.6 44 182 -69 - 2 2 9 - 3 30 47 - 1 54 45 - 3 37 58 -1.02 - 51 0 0 - 2 58 34 2 45 41.4 44 182 -69 - 2 14 7 - 3 42 25 - 2 6 45 - 3 49 35 -1.02 - 50 0 0 - 3 9 16 2 45 33.2 44 183 -70 - 2 24 58 - 3 52 59 - 2 17 37 - 4 0 7 -1.02 - 49 0 0 - 3 18 52 2 45 25.0 44 184 -71 - 2 34 42 - 4 2 27 - 2 27 22 - 4 9 34 -1.02 - 48 0 0 - 3 27 22 2 45 16.9 45 185 -71 - 2 43 19 - 4 10 51 - 2 36 1 - 4 17 57 -1.02 - 47 0 0 - 3 34 48 2 45 8.7 45 186 -72 - 2 50 51 - 4 18 10 - 2 43 34 - 4 25 16 -1.02 - 46 0 0 - 3 41 8 2 45 0.6 45 187 -72 - 2 57 17 - 4 24 26 - 2 50 0 - 4 31 31 -1.02 - 45 0 0 - 3 46 25 2 44 52.4 45 188 -72 - 3 2 37 - 4 29 39 - 2 55 22 - 4 36 42 -1.02 - 44 0 0 - 3 50 37 2 44 44.3 44 189 -73 - 3 6 53 - 4 33 48 - 2 59 38 - 4 40 51 -1.02 - 43 0 0 - 3 53 45 2 44 36.2 44 190 -73 - 3 10 4 - 4 36 54 - 3 2 49 - 4 43 56 -1.02 - 42 0 0 - 3 55 50 2 44 28.2 44 190 -73 - 3 12 10 - 4 38 56 - 3 4 55 - 4 45 59 -1.02 - 41 0 0 - 3 56 51 2 44 20.1 44 191 -73 - 3 13 11 - 4 39 56 - 3 5 57 - 4 46 59 -1.02 - 40 0 0 - 3 56 47 2 44 12.1 44 192 -73 - 3 13 8 - 4 39 54 - 3 5 53 - 4 46 56 -1.02 - 39 0 0 - 3 55 40 2 44 4.1 44 193 -73 - 3 12 0 - 4 38 48 - 3 4 45 - 4 45 50 -1.02 - 38 0 0 - 3 53 30 2 43 56.2 43 194 -73 - 3 9 47 - 4 36 39 - 3 2 32 - 4 43 42 -1.02 - 37 0 0 - 3 50 15 2 43 48.3 43 195 -73 - 3 6 29 - 4 33 27 - 2 59 14 - 4 40 30 -1.02 - 36 0 0 - 3 45 56 2 43 40.4 43 195 -73 - 3 2 6 - 4 29 11 - 2 54 50 - 4 36 16 -1.02 - 35 0 0 - 3 40 32 2 43 32.5 42 196 -73 - 2 56 38 - 4 23 53 - 2 49 21 - 4 30 57 -1.02 - 34 0 0 - 3 34 4 2 43 24.7 42 197 -72 - 2 50 5 - 4 17 30 - 2 42 47 - 4 24 35 -1.02 - 33 0 0 - 3 26 31 2 43 16.9 42 198 -72 - 2 42 25 - 4 10 3 - 2 35 6 - 4 17 10 -1.02 - 32 0 0 - 3 17 53 2 43 9.2 41 198 -71 - 2 33 39 - 4 1 32 - 2 26 19 - 4 8 39 -1.02 - 31 0 0 - 3 8 8 2 43 1.5 41 199 -71 - 2 23 46 - 3 51 55 - 2 16 24 - 3 59 4 -1.02 - 30 0 0 - 2 57 17 2 42 53.9 40 200 -70 - 2 12 46 - 3 41 14 - 2 5 23 - 3 48 24 -1.02 - 29 0 0 - 2 45 20 2 42 46.3 40 200 -70 - 2 0 38 - 3 29 26 - 1 53 13 - 3 36 38 -1.02 - 28 0 0 - 2 32 14 2 42 38.7 39 201 -69 - 1 47 21 - 3 16 31 - 1 39 54 - 3 23 45 -1.03 - 27 0 0 - 2 18 1 2 42 31.3 39 202 -68 - 1 32 55 - 3 2 30 - 1 25 26 - 3 9 46 -1.03 - 26 0 0 - 2 2 38 2 42 23.8 38 202 -68 - 1 17 18 - 2 47 20 - 1 9 47 - 2 54 38 -1.03 - 25 0 0 - 1 46 6 2 42 16.5 37 203 -67 - 1 0 31 - 2 31 2 - 0 52 57 - 2 38 22 -1.03 - 24 0 0 - 1 28 22 2 42 9.2 37 203 -66 - 0 42 32 - 2 13 34 - 0 34 56 - 2 20 57 -1.03 - 23 0 0 - 1 9 28 2 42 1.9 36 204 -65 - 0 23 20 - 1 54 55 - 0 15 41 - 2 2 21 -1.03 - 22 0 0 - 0 49 20 2 41 54.7 35 204 -64 - 0 2 55 - 1 35 6 0 4 48 - 1 42 34 -1.03 - 21 0 0 - 0 27 59 2 41 47.7 35 205 -63 0 18 46 - 1 14 3 0 26 32 - 1 21 34 -1.03 - 20 0 0 - 0 5 23 2 41 40.7 34 205 -63 0 41 43 - 0 51 47 0 49 32 - 0 59 21 -1.03 - 19 0 0 0 18 29 2 41 33.7 33 206 -62 1 5 57 - 0 28 16 1 13 51 - 0 35 54 -1.04 - 18 0 0 0 43 39 2 41 26.9 32 206 -61 1 31 31 - 0 3 29 1 39 28 - 0 11 11 -1.04 - 17 0 0 1 10 7 2 41 20.2 31 207 -60 1 58 24 0 22 35 2 6 26 0 14 49 -1.04 - 16 0 0 1 37 55 2 41 13.5 31 207 -59 2 26 39 0 49 58 2 34 45 0 42 8 -1.04 - 15 0 0 2 7 6 2 41 7.0 30 208 -58 2 56 18 1 18 41 3 4 29 1 10 47 -1.04 - 14 0 0 2 37 39 2 41 0.6 29 208 -57 3 27 22 1 48 46 3 35 38 1 40 48 -1.04 - 13 0 0 3 9 38 2 40 54.3 28 208 -55 3 59 53 2 20 14 4 8 14 2 12 11 -1.04 - 12 0 0 3 43 4 2 40 48.1 27 209 -54 4 33 53 2 53 8 4 42 20 2 45 0 -1.05 - 11 0 0 4 17 59 2 40 42.1 26 209 -53 5 9 24 3 27 29 5 17 57 3 19 15 -1.05 - 10 0 0 4 54 25 2 40 36.2 25 209 -52 5 46 28 4 3 18 5 55 8 3 54 59 -1.05 - 9 0 0 5 32 24 2 40 30.4 24 210 -51 6 25 8 4 40 39 6 33 55 4 32 13 -1.05 - 8 0 0 6 11 59 2 40 24.9 23 210 -50 7 5 26 5 19 33 7 14 20 5 11 1 -1.05 - 7 0 0 6 53 12 2 40 19.5 22 210 -49 7 47 24 6 0 3 7 56 26 5 51 24 -1.06 - 6 0 0 7 36 5 2 40 14.2 21 211 -48 8 31 6 6 42 10 8 40 17 6 33 24 -1.06 - 5 0 0 8 20 42 2 40 9.2 20 211 -46 9 16 35 7 25 58 9 25 54 7 17 4 -1.06 - 4 0 0 9 7 4 2 40 4.4 18 211 -45 10 3 53 8 11 29 10 13 21 8 2 27 -1.06 - 3 0 0 9 55 16 2 39 59.8 17 212 -44 10 53 3 8 58 47 11 2 42 8 49 36 -1.07 - 2 0 0 10 45 21 2 39 55.5 16 212 -43 11 44 10 9 47 53 11 53 59 9 38 33 -1.07 - 1 0 0 11 37 22 2 39 51.4 15 212 -41 12 37 18 10 38 51 12 47 18 10 29 21 -1.07 0 0 0 12 31 22 2 39 47.5 14 212 -40 13 32 29 11 31 45 13 42 42 11 22 5 -1.08 1 0 0 13 27 26 2 39 44.0 12 213 -39 14 29 49 12 26 39 14 40 15 12 16 47 -1.08 2 0 0 14 25 37 2 39 40.7 11 213 -37 15 29 23 13 23 35 15 40 3 13 13 31 -1.09 3 0 0 15 26 1 2 39 37.8 10 213 -36 16 31 15 14 22 38 16 42 10 14 12 22 -1.10 4 0 0 16 28 43 2 39 35.2 8 214 -34 17 35 31 15 23 52 17 46 42 15 13 23 -1.11 5 0 0 17 33 46 2 39 33.0 7 214 -33 18 42 16 16 27 23 18 53 46 16 16 38 -1.12 6 0 0 18 41 18 2 39 31.2 5 214 -32 19 51 39 17 33 14 20 3 28 17 22 14 -1.15 7 0 0 19 51 24 2 39 29.9 4 215 -30 21 3 45 18 41 31 21 15 55 18 30 14 -1.19 8 0 0 21 4 11 2 39 28.9 2 215 -29 22 18 42 19 52 20 22 31 15 19 40 45 -1.29 9 0 0 22 19 45 2 39 28.5 1 215 -27 .. .. .. 21 5 47 .. .. .. 20 53 52 -1.85 10 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 22 21 59 .. .. .. 22 9 43 .... Uncertainty in time = +/- 1 secs Prediction of 2023 May 29.0 Data for the target star ------------------------ * name: UCAC4 207-173752 * constellation : Telescopium * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 03 45.6631 DE: -48 42 09.150 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 03 45.6630 DE: -48 42 09.151 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (36) Atalante asteroid class: approx. diameter [km]: 112 approx. diameter ["]: 0.077 distance from Earth [AU]: 2.00670 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#109 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): 0.012", 0.005", 76.778° remarks: * orbital elements for (36)Atalante : Mean anomaly = 274.4421151651 deg Arg. of pericenter = 47.8303905589 deg Long. of node = 358.1958472811 deg Inclination = 18.3738490654 deg Eccentricity = 0.3061324380 Semimajor axis = 2.7452763605 AU Perihelion dist = 1.9048582154 AU Mag: H = 8.60, G = 0.15 Epoch of elements : MJD 60146.11465278 TDT (2023 Jul 21.1147) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1092023Apr24,8.47,2023,7,21,2.751585,0.119322,0.702604,-7.375000,1.252586,0.001276,0.002531,0.000001,0.000000 -53.5000,-48.6683,140.34,20.53,False UCAC4 207-173752,19.06268419,-48.7025417,0.00,12.45,0.00,0.0,0,,19.09276448,-48.6683378,1.12,0.00,0,0,0 36,Atalante,13.10,112.2,2.0067,0,0,-3.262,5.49,,6.0,0 0,274.4173,2023,7,21,47.8304,358.1958,18.3738,0.30613,2.74528,1.90486,8.60,5.0,0.15 1.082,0.0120,0.0047,77,0.0063,Known errors,-1.00,-1,-1,-1 20230721_173752,60092.98 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 May 28, 23:38 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org