IOTA/IOTA-ES occultation update for (1436) Salonta / UCAC4 323-133520 event on 2023 Mar 24, 11:27 UT Visible from S USA, Mexico Summary ------- On 2023 Mar 24 UT, the 58.8 km diameter asteroid (1436) Salonta will occult a 12.3 mag star in the constellation Sagittarius for observers along a path across S USA, Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.74 mag to 15.95 mag (the magnitude of the asteroid) for at most 3.610 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 24, 11:23 - 2023 Mar 24, 11:30 * geocentric midpoint of event [JD]: 2460027.97737466 * magnitude of target star: 12.25 * magnitude drop [mag]: 3.74 * estimated maximum duration [s]: 3.610 * Moon: 10 % sunlit, 128° distance * Sun: 92° distance * rough path description: S USA, Mexico The occultation path -------------------- * approximate projected width [km]: 119 * 1 sigma uncertainty interval [path widths]: +/- 0.51 * 1 sigma uncertainty interval [seconds]: +/- 3.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.025, +/- 0.016) * 1 sigma uncertainty ellipse (major, minor, PA): (0.026", 0.015", 74°) * approx speed of asteroid's shadow [km/s]: 16.2935 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 323-133520 by 1436 Salonta on 2023 Mar 24 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 -145 0 0 .. .. .... .. .. .. .. .. .. 41 49 4 .. .. .. 41 10 9 .. .. .. .... -144 0 0 41 56 26 11 24 13.1 1 126 -41 41 17 38 42 36 13 40 39 7 .. .. .. .... -143 0 0 41 25 24 11 24 13.4 2 127 -41 40 47 0 42 4 43 40 8 53 42 45 43 -1.07 -142 0 0 40 55 11 11 24 13.8 3 127 -41 40 17 12 41 34 5 39 39 27 42 14 37 -1.32 -141 0 0 40 25 49 11 24 14.5 3 128 -41 39 48 12 41 4 18 39 10 50 41 44 23 -1.43 -140 0 0 39 57 18 11 24 15.3 4 129 -41 39 20 3 40 35 24 38 43 1 41 15 3 -1.50 -139 0 0 39 29 37 11 24 16.3 5 129 -41 38 52 43 40 7 21 38 16 1 40 46 36 -1.55 -138 0 0 39 2 48 11 24 17.6 6 130 -40 38 26 13 39 40 10 37 49 50 40 19 2 -1.58 -137 0 0 38 36 49 11 24 19.0 7 131 -40 38 0 34 39 13 52 37 24 29 39 52 22 -1.60 -136 0 0 38 11 43 11 24 20.6 8 131 -40 37 35 46 38 48 26 36 59 58 39 26 35 -1.62 -135 0 0 37 47 28 11 24 22.3 9 132 -40 37 11 48 38 23 53 36 36 16 39 1 42 -1.64 -134 0 0 37 24 5 11 24 24.3 10 133 -39 36 48 42 38 0 12 36 13 26 38 37 43 -1.65 -133 0 0 37 1 34 11 24 26.4 10 133 -39 36 26 26 37 37 25 35 51 25 38 14 37 -1.66 -132 0 0 36 39 56 11 24 28.7 11 134 -38 36 5 2 37 15 31 35 30 16 37 52 26 -1.67 -131 0 0 36 19 9 11 24 31.2 12 135 -38 35 44 30 36 54 29 35 9 57 37 31 9 -1.68 -130 0 0 35 59 16 11 24 33.9 13 135 -38 35 24 50 36 34 22 34 50 29 37 10 45 -1.69 -129 0 0 35 40 14 11 24 36.7 14 136 -37 35 6 1 36 15 7 34 31 52 36 51 16 -1.69 -128 0 0 35 22 6 11 24 39.6 14 137 -37 34 48 4 35 56 46 34 14 7 36 32 42 -1.70 -127 0 0 35 4 50 11 24 42.7 15 137 -36 34 31 0 35 39 18 33 57 13 36 15 1 -1.70 -126 0 0 34 48 27 11 24 46.0 16 138 -36 34 14 47 35 22 44 33 41 11 35 58 15 -1.71 -125 0 0 34 32 57 11 24 49.4 17 139 -35 33 59 27 35 7 4 33 26 0 35 42 24 -1.71 -124 0 0 34 18 20 11 24 53.0 18 140 -34 33 44 59 34 52 17 33 11 41 35 27 26 -1.72 -123 0 0 34 4 36 11 24 56.7 18 140 -34 33 31 24 34 38 24 32 58 14 35 13 24 -1.72 -122 0 0 33 51 45 11 25 0.6 19 141 -33 33 18 41 34 25 25 32 45 39 35 0 16 -1.72 -121 0 0 33 39 48 11 25 4.5 20 142 -32 33 6 51 34 13 20 32 33 56 34 48 2 -1.73 -120 0 0 33 28 43 11 25 8.7 20 143 -32 32 55 53 34 2 8 32 23 5 34 36 43 -1.73 -119 0 0 33 18 33 11 25 12.9 21 143 -31 32 45 49 33 51 51 32 13 6 34 26 19 -1.73 -118 0 0 33 9 15 11 25 17.2 22 144 -30 32 36 37 33 42 27 32 4 0 34 16 49 -1.74 -117 0 0 33 0 51 11 25 21.7 22 145 -30 32 28 17 33 33 58 31 55 45 34 8 14 -1.74 -116 0 0 32 53 20 11 25 26.3 23 146 -29 32 20 51 33 26 23 31 48 23 34 0 34 -1.74 -115 0 0 32 46 43 11 25 31.0 23 147 -28 32 14 18 33 19 42 31 41 54 33 53 48 -1.75 -114 0 0 32 41 0 11 25 35.8 24 147 -27 32 8 38 33 13 55 31 36 17 33 47 58 -1.75 -113 0 0 32 36 10 11 25 40.7 24 148 -27 32 3 51 33 9 2 31 31 32 33 43 2 -1.75 -112 0 0 32 32 14 11 25 45.7 25 149 -26 31 59 57 33 5 4 31 27 40 33 39 1 -1.75 -111 0 0 32 29 11 11 25 50.8 25 150 -25 31 56 56 33 2 0 31 24 41 33 35 55 -1.75 -110 0 0 32 27 3 11 25 56.0 26 151 -24 31 54 48 32 59 50 31 22 34 33 33 44 -1.76 -109 0 0 32 25 48 11 26 1.3 26 152 -23 31 53 34 32 58 35 31 21 20 33 32 28 -1.76 -108 0 0 32 25 27 11 26 6.6 27 153 -23 31 53 13 32 58 14 31 20 59 33 32 8 -1.76 -107 0 0 32 26 0 11 26 12.1 27 154 -22 31 53 45 32 58 47 31 21 31 33 32 42 -1.76 -106 0 0 32 27 27 11 26 17.6 27 155 -21 31 55 11 33 0 16 31 22 56 33 34 12 -1.76 -105 0 0 32 29 48 11 26 23.1 28 156 -20 31 57 30 33 2 39 31 25 13 33 36 37 -1.76 -104 0 0 32 33 3 11 26 28.8 28 157 -19 32 0 43 33 5 56 31 28 24 33 39 57 -1.76 -103 0 0 32 37 13 11 26 34.4 28 158 -18 32 4 50 33 10 9 31 32 28 33 44 12 -1.77 -102 0 0 32 42 16 11 26 40.2 29 159 -18 32 9 50 33 15 16 31 37 24 33 49 24 -1.77 -101 0 0 32 48 14 11 26 46.0 29 160 -17 32 15 44 33 21 18 31 43 14 33 55 30 -1.77 -100 0 0 32 55 6 11 26 51.8 29 161 -16 32 22 31 33 28 15 31 49 57 34 2 32 -1.77 - 99 0 0 33 2 53 11 26 57.7 29 162 -15 32 30 13 33 36 7 31 57 34 34 10 30 -1.77 - 98 0 0 33 11 33 11 27 3.6 29 163 -14 32 38 48 33 44 54 32 6 3 34 19 23 -1.77 - 97 0 0 33 21 9 11 27 9.5 29 164 -13 32 48 16 33 54 35 32 15 26 34 29 12 -1.77 - 96 0 0 33 31 38 11 27 15.5 29 165 -12 32 58 39 34 5 13 32 25 42 34 39 57 -1.77 - 95 0 0 33 43 3 11 27 21.4 29 166 -11 33 9 56 34 16 45 32 36 51 34 51 38 -1.77 - 94 0 0 33 55 21 11 27 27.4 29 167 -11 33 22 6 34 29 12 32 48 54 35 4 15 -1.77 - 93 0 0 34 8 35 11 27 33.4 29 168 -10 33 35 11 34 42 35 33 1 50 35 17 48 -1.77 - 92 0 0 34 22 43 11 27 39.4 29 169 -9 33 49 9 34 56 53 33 15 39 35 32 16 -1.77 - 91 0 0 34 37 45 11 27 45.4 29 170 -8 34 4 2 35 12 6 33 30 22 35 47 41 -1.77 - 90 0 0 34 53 43 11 27 51.4 29 171 -7 34 19 49 35 28 15 33 45 58 36 4 2 -1.77 - 89 0 0 35 10 35 11 27 57.4 29 172 -6 34 36 29 35 45 19 34 2 28 36 21 20 -1.77 - 88 0 0 35 28 21 11 28 3.4 29 173 -5 34 54 3 36 3 19 34 19 50 36 39 33 -1.77 - 87 0 0 35 47 3 11 28 9.3 29 174 -4 35 12 32 36 22 14 34 38 6 36 58 43 -1.77 - 86 0 0 36 6 39 11 28 15.2 28 175 -4 35 31 54 36 42 4 34 57 16 37 18 49 -1.77 - 85 0 0 36 27 9 11 28 21.1 28 177 -3 35 52 10 37 2 50 35 17 18 37 39 52 -1.77 - 84 0 0 36 48 34 11 28 26.9 28 178 -2 36 13 20 37 24 32 35 38 13 38 1 51 -1.77 - 83 0 0 37 10 54 11 28 32.7 27 179 -1 36 35 24 37 47 8 36 0 1 38 24 46 -1.77 - 82 0 0 37 34 8 11 28 38.4 27 180 0 36 58 21 38 10 40 36 22 42 38 48 37 -1.77 - 81 0 0 37 58 16 11 28 44.1 27 181 1 37 22 12 38 35 8 36 46 16 39 13 25 -1.77 - 80 0 0 38 23 19 11 28 49.7 26 182 1 37 46 56 39 0 30 37 10 42 39 39 9 -1.77 - 79 0 0 38 49 16 11 28 55.2 26 183 2 38 12 33 39 26 48 37 36 1 40 5 49 -1.77 - 78 0 0 39 16 7 11 29 0.6 25 184 3 38 39 3 39 54 0 38 2 12 40 33 26 -1.77 - 77 0 0 39 43 51 11 29 6.0 25 185 4 39 6 26 40 22 8 38 29 14 41 1 58 -1.77 - 76 0 0 40 12 29 11 29 11.2 24 186 5 39 34 42 40 51 10 38 57 9 41 31 27 -1.77 - 75 0 0 40 42 1 11 29 16.4 24 187 5 40 3 50 41 21 6 39 25 54 42 1 51 -1.77 - 74 0 0 41 12 25 11 29 21.5 23 188 6 40 33 50 41 51 57 39 55 31 42 33 11 -1.77 - 73 0 0 41 43 42 11 29 26.4 22 189 7 41 4 41 42 23 42 40 25 58 43 5 26 -1.78 - 72 0 0 42 15 52 11 29 31.3 22 190 7 41 36 24 42 56 21 40 57 16 43 38 37 -1.78 - 71 0 0 42 48 54 11 29 36.0 21 191 8 42 8 58 43 29 54 41 29 23 44 12 43 -1.78 - 70 0 0 43 22 48 11 29 40.6 20 191 9 42 42 23 44 4 20 42 2 20 44 47 44 -1.78 - 69 0 0 43 57 34 11 29 45.0 20 192 10 43 16 38 44 39 39 42 36 6 45 23 40 -1.78 - 68 0 0 44 33 10 11 29 49.3 19 193 10 43 51 42 45 15 50 43 10 40 46 0 30 -1.78 - 67 0 0 45 9 37 11 29 53.4 18 194 11 44 27 35 45 52 54 43 46 2 46 38 15 -1.78 - 66 0 0 45 46 54 11 29 57.4 17 195 11 45 4 17 46 30 49 44 22 11 47 16 53 -1.78 - 65 0 0 46 25 0 11 30 1.3 17 196 12 45 41 47 47 9 35 44 59 6 47 56 25 -1.78 - 64 0 0 47 3 56 11 30 4.9 16 197 13 46 20 3 47 49 12 45 36 47 48 36 49 -1.78 - 63 0 0 47 43 39 11 30 8.4 15 198 13 46 59 7 48 29 40 46 15 13 49 18 7 -1.78 - 62 0 0 48 24 10 11 30 11.7 14 199 14 47 38 55 49 10 57 46 54 23 50 0 16 -1.79 - 61 0 0 49 5 27 11 30 14.8 13 199 14 48 19 29 49 53 3 47 34 16 50 43 17 -1.79 - 60 0 0 49 47 30 11 30 17.7 12 200 15 49 0 46 50 35 57 48 14 51 51 27 9 -1.79 - 59 0 0 50 30 17 11 30 20.5 11 201 15 49 42 46 51 19 38 48 56 7 52 11 52 -1.79 - 58 0 0 51 13 49 11 30 23.0 10 202 15 50 25 27 52 4 6 49 38 3 52 57 25 -1.80 - 57 0 0 51 58 4 11 30 25.3 10 203 16 51 8 49 52 49 20 50 20 37 53 43 48 -1.80 - 56 0 0 52 43 0 11 30 27.4 9 204 16 51 52 50 53 35 19 51 3 49 54 30 59 -1.81 - 55 0 0 53 28 37 11 30 29.3 8 205 16 52 37 30 54 22 1 51 47 36 55 18 59 -1.82 - 54 0 0 54 14 53 11 30 31.0 7 205 17 53 22 46 55 9 27 52 31 58 56 7 46 -1.83 - 53 0 0 55 1 48 11 30 32.4 6 206 17 54 8 38 55 57 34 53 16 53 56 57 21 -1.84 - 52 0 0 55 49 19 11 30 33.6 5 207 17 54 55 3 56 46 22 54 2 20 57 47 41 -1.86 - 51 0 0 56 37 26 11 30 34.6 4 208 17 55 42 0 57 35 50 54 48 15 58 38 46 -1.89 - 50 0 0 57 26 6 11 30 35.4 3 209 17 56 29 27 58 25 56 55 34 39 59 30 37 -1.93 - 49 0 0 58 15 18 11 30 35.9 2 210 18 57 17 22 59 16 38 56 21 28 60 23 11 -2.03 - 48 0 0 59 5 0 11 30 36.2 1 210 18 58 5 44 .. .. .. 57 8 40 .. .. .. -2.32 - 47 0 0 .. .. .... .. .. .. .. .. .. 58 54 30 .. .. .. 57 56 14 .. .. .. .... - 46 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. 58 44 7 .. .. .. .... Uncertainty in time = +/- 3 secs Prediction of 2023 Feb 15.9 Data for the target star ------------------------ * name: UCAC4 323-133520 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 07 19.0864 DE: -25 35 25.240 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 07 19.0864 DE: -25 35 25.240 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 12.3 * 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]: 2.79480 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", 73.607° remarks: * orbital elements for (1436)Salonta : Mean anomaly = 324.4926403880 deg Arg. of pericenter = 31.4462678629 deg Long. of node = 260.3818024448 deg Inclination = 13.8893187632 deg Eccentricity = 0.0615931660 Semimajor axis = 3.1466191089 AU Perihelion dist = 2.9528088757 AU Mag: H = 10.33, G = 0.15 Epoch of elements : MJD 60027.47743056 TDT (2023 Mar 24.4774) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Feb09,3.61,2023,3,24,11.456992,-0.187381,0.849309,8.979918,1.984082,-0.005863,-0.000082,0.000000,0.000000 -81.3513,-25.5879,9.73,1.42,False UCAC4 323-133520,18.12196843,-25.5903443,0.00,12.25,0.00,0.0,0,,18.14573250,-25.5878680,3.74,0.00,0,0,0 1436,Salonta,15.95,58.8,2.7948,0,0,2.089,6.25,,3.0,0 0,324.4083,2023,3,24,31.4463,260.3818,13.8893,0.06159,3.14662,2.95281,10.36,5.0,0.15 1.508,0.0257,0.0147,74,0.0147,Known errors,-1.00,-1,-1,-1 20230324_133520,59990.87 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Feb 15, 20:52 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org