IOTA/IOTA-ES occultation update for (1436) Salonta / UCAC4-323-136553 event on 2023 Mar 26, 09:55 UT Visible from SE USA, Mexico Summary ------- On 2023 Mar 26 UT, the 58.8 km diameter asteroid (1436) Salonta will occult a 12.4 mag star in the constellation Sagittarius for observers along a path across SE USA, Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.55 mag to 15.93 mag (the magnitude of the asteroid) for at most 3.790 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: 91 * date and approx. time of event: 2023 Mar 26, 09:51 - 2023 Mar 26, 10:00 * geocentric midpoint of event [JD]: 2460029.91372700 * magnitude of target star: 12.42 * magnitude drop [mag]: 3.55 * estimated maximum duration [s]: 3.790 * Moon: 25 % sunlit, 154° distance * Sun: 93° distance * rough path description: SE USA, Mexico The occultation path -------------------- * approximate projected width [km]: 96 * 1 sigma uncertainty interval [path widths]: +/- 0.51 * 1 sigma uncertainty interval [seconds]: +/- 3.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.025, +/- 0.016) * 1 sigma uncertainty ellipse (major, minor, PA): (0.026", 0.015", 73°) * approx speed of asteroid's shadow [km/s]: 15.5097 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4-323-136553 by 1436 Salonta on 2023 Mar 26 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 -130 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. 33 55 57 .. .. .. .... -129 0 0 34 26 25 9 51 35.0 1 122 -50 33 56 23 34 56 51 33 25 56 35 28 33 .... -128 0 0 33 56 37 9 51 35.2 2 122 -50 33 26 47 34 26 50 32 56 32 34 58 19 -0.74 -127 0 0 33 27 26 9 51 35.6 3 123 -50 32 57 48 33 57 27 32 27 45 34 28 42 -0.94 -126 0 0 32 58 54 9 51 36.2 4 124 -50 32 29 27 33 28 43 31 59 36 33 59 45 -1.03 -125 0 0 32 31 1 9 51 37.0 5 124 -50 32 1 45 33 0 38 31 32 4 33 31 28 -1.09 -124 0 0 32 3 47 9 51 38.0 5 125 -50 31 34 42 32 33 13 31 5 12 33 3 50 -1.12 -123 0 0 31 37 13 9 51 39.1 6 125 -50 31 8 19 32 6 28 30 38 59 32 36 54 -1.15 -122 0 0 31 11 19 9 51 40.5 7 126 -49 30 42 36 31 40 24 30 13 26 32 10 38 -1.17 -121 0 0 30 46 7 9 51 42.0 8 126 -49 30 17 34 31 15 2 29 48 34 31 45 5 -1.18 -120 0 0 30 21 37 9 51 43.7 9 127 -49 29 53 13 30 50 21 29 24 23 31 20 14 -1.19 -119 0 0 29 57 48 9 51 45.6 10 127 -49 29 29 34 30 26 23 29 0 53 30 56 6 -1.20 -118 0 0 29 34 42 9 51 47.7 11 128 -48 29 6 36 30 3 8 28 38 4 30 32 40 -1.21 -117 0 0 29 12 19 9 51 49.9 12 128 -48 28 44 22 29 40 36 28 15 59 30 9 59 -1.22 -116 0 0 28 50 39 9 51 52.3 13 129 -47 28 22 50 29 18 47 27 54 35 29 48 1 -1.22 -115 0 0 28 29 43 9 51 54.9 14 130 -47 28 2 2 28 57 42 27 33 55 29 26 47 -1.23 -114 0 0 28 9 30 9 51 57.7 15 130 -47 27 41 57 28 37 22 27 13 57 29 6 18 -1.23 -113 0 0 27 50 2 9 52 0.6 16 131 -46 27 22 36 28 17 46 26 54 44 28 46 34 -1.24 -112 0 0 27 31 18 9 52 3.7 17 131 -45 27 3 59 27 58 55 26 36 14 28 27 35 -1.24 -111 0 0 27 13 19 9 52 6.9 17 132 -45 26 46 7 27 40 48 26 18 28 28 9 22 -1.24 -110 0 0 26 56 5 9 52 10.3 18 132 -44 26 28 59 27 23 28 26 1 27 27 51 54 -1.25 -109 0 0 26 39 35 9 52 13.9 19 133 -44 26 12 36 27 6 52 25 45 10 27 35 12 -1.25 -108 0 0 26 23 52 9 52 17.6 20 134 -43 25 56 58 26 51 3 25 29 38 27 19 16 -1.25 -107 0 0 26 8 54 9 52 21.4 21 134 -42 25 42 6 26 35 59 25 14 51 27 4 6 -1.26 -106 0 0 25 54 42 9 52 25.4 22 135 -42 25 27 59 26 21 41 25 0 49 26 49 43 -1.26 -105 0 0 25 41 15 9 52 29.6 22 135 -41 25 14 37 26 8 10 24 47 33 26 36 6 -1.26 -104 0 0 25 28 35 9 52 33.9 23 136 -40 25 2 2 25 55 25 24 35 2 26 23 16 -1.26 -103 0 0 25 16 42 9 52 38.3 24 137 -40 24 50 13 25 43 27 24 23 17 26 11 14 -1.26 -102 0 0 25 5 34 9 52 42.8 25 137 -39 24 39 9 25 32 16 24 12 17 25 59 58 -1.27 -101 0 0 24 55 14 9 52 47.5 25 138 -38 24 28 52 25 21 51 24 2 4 25 49 29 -1.27 -100 0 0 24 45 40 9 52 52.3 26 139 -37 24 19 22 25 12 14 23 52 37 25 39 48 -1.27 - 99 0 0 24 36 53 9 52 57.3 27 140 -37 24 10 38 25 3 23 23 43 56 25 30 54 -1.27 - 98 0 0 24 28 52 9 53 2.3 28 140 -36 24 2 40 24 55 20 23 36 1 25 22 48 -1.27 - 97 0 0 24 21 39 9 53 7.5 28 141 -35 23 55 30 24 48 4 23 28 53 25 15 30 -1.28 - 96 0 0 24 15 13 9 53 12.8 29 142 -34 23 49 6 24 41 36 23 22 32 25 8 59 -1.28 - 95 0 0 24 9 34 9 53 18.1 30 143 -33 23 43 29 24 35 55 23 16 57 25 3 16 -1.28 - 94 0 0 24 4 43 9 53 23.6 30 144 -32 23 38 39 24 31 2 23 12 8 24 58 21 -1.28 - 93 0 0 24 0 38 9 53 29.2 31 144 -31 23 34 36 24 26 56 23 8 6 24 54 14 -1.28 - 92 0 0 23 57 21 9 53 34.9 31 145 -31 23 31 20 24 23 38 23 4 51 24 50 55 -1.28 - 91 0 0 23 54 52 9 53 40.7 32 146 -30 23 28 51 24 21 8 23 2 23 24 48 24 -1.28 - 90 0 0 23 53 10 9 53 46.6 33 147 -29 23 27 9 24 19 26 23 0 42 24 46 41 -1.28 - 89 0 0 23 52 15 9 53 52.6 33 148 -28 23 26 15 24 18 31 22 59 48 24 45 46 -1.29 - 88 0 0 23 52 8 9 53 58.6 34 149 -27 23 26 8 24 18 24 22 59 41 24 45 40 -1.29 - 87 0 0 23 52 50 9 54 4.7 34 150 -26 23 26 49 24 19 6 23 0 21 24 46 22 -1.29 - 86 0 0 23 54 18 9 54 10.9 34 151 -25 23 28 17 24 20 36 23 1 48 24 47 52 -1.29 - 85 0 0 23 56 35 9 54 17.2 35 152 -24 23 30 32 24 22 53 23 4 3 24 50 11 -1.29 - 84 0 0 23 59 39 9 54 23.6 35 153 -23 23 33 35 24 25 59 23 7 4 24 53 18 -1.29 - 83 0 0 24 3 32 9 54 30.0 36 154 -22 23 37 26 24 29 53 23 10 53 24 57 14 -1.29 - 82 0 0 24 8 12 9 54 36.4 36 155 -22 23 42 4 24 34 35 23 15 29 25 1 58 -1.29 - 81 0 0 24 13 40 9 54 43.0 36 156 -21 23 47 30 24 40 5 23 20 53 25 7 31 -1.29 - 80 0 0 24 19 56 9 54 49.5 37 157 -20 23 53 43 24 46 24 23 27 4 25 13 52 -1.29 - 79 0 0 24 26 59 9 54 56.2 37 158 -19 24 0 44 24 53 31 23 34 2 25 21 2 -1.29 - 78 0 0 24 34 51 9 55 2.8 37 159 -18 24 8 32 25 1 26 23 41 47 25 29 1 -1.29 - 77 0 0 24 43 31 9 55 9.5 37 160 -17 24 17 9 25 10 9 23 50 20 25 37 48 -1.29 - 76 0 0 24 52 59 9 55 16.3 37 162 -16 24 26 33 25 19 41 23 59 40 25 47 24 -1.29 - 75 0 0 25 3 14 9 55 23.0 37 163 -15 24 36 44 25 30 0 24 9 47 25 57 48 -1.30 - 74 0 0 25 14 17 9 55 29.8 38 164 -14 24 47 43 25 41 8 24 20 42 26 9 1 -1.30 - 73 0 0 25 26 8 9 55 36.6 38 165 -13 24 59 29 25 53 4 24 32 23 26 21 2 -1.30 - 72 0 0 25 38 47 9 55 43.5 38 166 -12 25 12 3 26 5 48 24 44 52 26 33 51 -1.30 - 71 0 0 25 52 14 9 55 50.3 38 167 -11 25 25 24 26 19 20 24 58 8 26 47 29 -1.30 - 70 0 0 26 6 27 9 55 57.2 38 169 -10 25 39 32 26 33 40 25 12 10 27 1 55 -1.30 - 69 0 0 26 21 29 9 56 4.0 38 170 -9 25 54 27 26 48 47 25 27 0 27 17 9 -1.30 - 68 0 0 26 37 17 9 56 10.9 37 171 -8 26 10 10 27 4 42 25 42 36 27 33 11 -1.30 - 67 0 0 26 53 53 9 56 17.7 37 172 -7 26 26 39 27 21 25 25 58 58 27 50 1 -1.30 - 66 0 0 27 11 16 9 56 24.5 37 173 -6 26 43 55 27 38 55 26 16 8 28 7 39 -1.30 - 65 0 0 27 29 26 9 56 31.3 37 175 -5 27 1 58 27 57 13 26 34 3 28 26 4 -1.30 - 64 0 0 27 48 23 9 56 38.1 37 176 -5 27 20 47 28 16 17 26 52 44 28 45 17 -1.30 - 63 0 0 28 8 6 9 56 44.9 36 177 -4 27 40 22 28 36 9 27 12 12 29 5 17 -1.30 - 62 0 0 28 28 35 9 56 51.6 36 178 -3 28 0 43 28 56 47 27 32 25 29 26 4 -1.30 - 61 0 0 28 49 51 9 56 58.3 36 179 -2 28 21 50 29 18 11 27 53 23 29 47 38 -1.30 - 60 0 0 29 11 52 9 57 4.9 35 180 -1 28 43 43 29 40 22 28 15 7 30 9 58 -1.30 - 59 0 0 29 34 39 9 57 11.5 35 181 0 29 6 20 30 3 18 28 37 35 30 33 5 -1.30 - 58 0 0 29 58 11 9 57 18.1 35 183 1 29 29 42 30 27 0 29 0 48 30 56 58 -1.30 - 57 0 0 30 22 28 9 57 24.5 34 184 2 29 53 49 30 51 27 29 24 45 31 21 36 -1.30 - 56 0 0 30 47 29 9 57 30.9 34 185 3 30 18 40 31 16 39 29 49 25 31 46 59 -1.29 - 55 0 0 31 13 14 9 57 37.3 33 186 4 30 44 15 31 42 35 30 14 49 32 13 6 -1.29 - 54 0 0 31 39 42 9 57 43.5 33 187 5 31 10 32 32 9 15 30 40 56 32 39 58 -1.29 - 53 0 0 32 6 54 9 57 49.7 32 188 5 31 37 32 32 36 38 31 7 45 33 7 34 -1.29 - 52 0 0 32 34 48 9 57 55.8 31 189 6 32 5 15 33 4 44 31 35 16 33 35 53 -1.29 - 51 0 0 33 3 24 9 58 1.8 31 190 7 32 33 38 33 33 32 32 3 28 34 4 54 -1.29 - 50 0 0 33 32 41 9 58 7.7 30 191 8 33 2 43 34 3 2 32 32 21 34 34 38 -1.29 - 49 0 0 34 2 38 9 58 13.4 30 192 9 33 32 28 34 33 12 33 1 53 35 5 3 -1.29 - 48 0 0 34 33 16 9 58 19.1 29 193 10 34 2 53 35 4 3 33 32 5 35 36 8 -1.29 - 47 0 0 35 4 32 9 58 24.6 28 194 10 34 33 56 35 35 34 34 2 55 36 7 53 -1.29 - 46 0 0 35 36 27 9 58 30.1 27 195 11 35 5 37 36 7 43 34 34 23 36 40 17 -1.29 - 45 0 0 36 8 59 9 58 35.4 27 196 12 35 37 55 36 40 29 35 6 27 37 13 20 -1.29 - 44 0 0 36 42 8 9 58 40.5 26 197 13 36 10 50 37 13 53 35 39 8 37 46 59 -1.29 - 43 0 0 37 15 52 9 58 45.5 25 198 13 36 44 20 37 47 52 36 12 23 38 21 15 -1.29 - 42 0 0 37 50 11 9 58 50.4 24 199 14 37 18 23 38 22 27 36 46 12 38 56 6 -1.29 - 41 0 0 38 25 3 9 58 55.1 24 199 15 37 53 0 38 57 34 37 20 35 39 31 31 -1.29 - 40 0 0 39 0 27 9 58 59.7 23 200 16 38 28 9 39 33 15 37 55 29 40 7 28 -1.29 - 39 0 0 39 36 23 9 59 4.1 22 201 16 39 3 49 40 9 27 38 30 53 40 43 58 -1.29 - 38 0 0 40 12 48 9 59 8.4 21 202 17 39 39 59 40 46 9 39 6 47 41 20 58 -1.29 - 37 0 0 40 49 42 9 59 12.5 20 203 17 40 16 36 41 23 19 39 43 9 41 58 27 -1.29 - 36 0 0 41 27 3 9 59 16.4 19 204 18 40 53 41 42 0 58 40 19 57 42 36 24 -1.29 - 35 0 0 42 4 49 9 59 20.1 18 205 19 41 31 11 42 39 2 40 57 11 43 14 47 -1.30 - 34 0 0 42 43 0 9 59 23.7 18 205 19 42 9 5 43 17 30 41 34 48 43 53 34 -1.30 - 33 0 0 43 21 33 9 59 27.0 17 206 20 42 47 21 43 56 21 42 12 48 44 32 45 -1.30 - 32 0 0 44 0 28 9 59 30.2 16 207 20 43 25 59 44 35 34 42 51 9 45 12 17 -1.30 - 31 0 0 44 39 42 9 59 33.3 15 208 21 44 4 55 45 15 6 43 29 49 45 52 9 -1.30 - 30 0 0 45 19 13 9 59 36.1 14 209 21 44 44 9 45 54 56 44 8 46 46 32 19 -1.30 - 29 0 0 45 59 0 9 59 38.7 13 209 22 45 23 39 46 35 1 44 47 59 47 12 44 -1.30 - 28 0 0 46 39 2 9 59 41.2 12 210 22 46 3 23 47 15 21 45 27 26 47 53 24 -1.30 - 27 0 0 47 19 15 9 59 43.4 11 211 22 46 43 19 47 55 53 46 7 5 48 34 16 -1.30 - 26 0 0 47 59 39 9 59 45.5 10 212 23 47 23 25 48 36 35 46 46 54 49 15 19 -1.31 - 25 0 0 48 40 10 9 59 47.4 9 213 23 48 3 39 49 17 25 47 26 51 49 56 29 -1.31 - 24 0 0 49 20 48 9 59 49.0 8 213 23 48 44 0 49 58 22 48 6 55 50 37 46 -1.31 - 23 0 0 50 1 30 9 59 50.5 7 214 24 49 24 25 50 39 22 48 47 4 51 19 6 -1.32 - 22 0 0 50 42 15 9 59 51.9 7 215 24 50 4 52 51 20 24 49 27 14 52 0 28 -1.32 - 21 0 0 51 22 59 9 59 53.0 6 216 24 50 45 19 52 1 26 50 7 25 52 41 50 -1.33 - 20 0 0 52 3 40 9 59 53.9 5 216 24 51 25 45 52 42 25 50 47 35 53 23 9 -1.34 - 19 0 0 52 44 18 9 59 54.7 4 217 25 52 6 6 53 23 20 51 27 41 54 4 22 -1.35 - 18 0 0 53 24 48 9 59 55.3 3 218 25 52 46 21 54 4 8 52 7 41 54 45 29 -1.38 - 17 0 0 54 5 11 9 59 55.7 2 219 25 53 26 28 54 44 46 52 47 33 55 26 25 -1.42 - 16 0 0 54 45 22 9 59 56.0 1 220 25 54 6 24 55 25 13 53 27 15 56 7 10 -1.52 - 15 0 0 55 25 20 9 59 56.1 0 221 25 54 46 8 .. .. .. 54 6 45 .. .. .. -2.52 - 14 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. 54 46 1 .. .. .. .... Uncertainty in time = +/- 3 secs Prediction of 2023 Feb 15.9 Data for the target star ------------------------ * name: UCAC4-323-136553 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 08 54.1420 DE: -25 30 33.764 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 08 54.1420 DE: -25 30 33.764 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1436) Salonta asteroid class: approx. diameter [km]: 59 approx. diameter ["]: 0.029 distance from Earth [AU]: 2.76700 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 date of fit: 2023 Feb 09 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): 0.026", 0.015", 73.461° remarks: * orbital elements for (1436)Salonta : Mean anomaly = 324.8338549924 deg Arg. of pericenter = 31.4469043227 deg Long. of node = 260.3817923858 deg Inclination = 13.8893354332 deg Eccentricity = 0.0615912545 Semimajor axis = 3.1466126535 AU Perihelion dist = 2.9528088327 AU Mag: H = 10.33, G = 0.15 Epoch of elements : MJD 60029.41375000 TDT (2023 Mar 26.4137) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Feb09,3.79,2023,3,26,9.929448,-0.182452,0.769539,8.517368,2.021983,-0.005837,-0.000093,0.000000,0.000000 -59.9506,-25.5060,32.50,2.18,False UCAC4-323-136553,18.14837275,-25.5093790,0.00,12.42,0.00,0.0,0,,18.17213776,-25.5059940,3.55,0.00,0,0,1 1436,Salonta,15.93,58.8,2.7670,0,0,2.000,6.43,,3.0,0 0,324.7608,2023,3,26,31.4469,260.3818,13.8893,0.06159,3.14661,2.95281,10.36,5.0,0.15 1.514,0.0260,0.0150,73,0.0150,Known errors,-1.00,-1,-1,-1 20230326_136553,59990.87 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Feb 15, 20:53 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org