IOTA/IOTA-ES occultation update for (1237) Genevieve / UCAC4-282-214805 event on 2023 Aug 17, 06:29 UT Visible from USA, Mexico Summary ------- On 2023 Aug 17 UT, the 40.1 km diameter asteroid (1237) Genevieve will occult a 12.5 mag star in the constellation Microscopium for observers along a path across USA, Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.08 mag to 14.36 mag (the magnitude of the asteroid) for at most 4.490 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 Aug 17, 06:24 - 2023 Aug 17, 06:35 * geocentric midpoint of event [JD]: 2460173.77061925 * magnitude of target star: 12.45 * magnitude drop [mag]: 2.08 * estimated maximum duration [s]: 4.490 * Moon: 1 % sunlit, 150° distance * Sun: 157° distance * rough path description: USA, Mexico The occultation path -------------------- * approximate projected width [km]: 93 * 1 sigma uncertainty interval [path widths]: +/- 0.01 * 1 sigma uncertainty interval [seconds]: +/- 1.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.012, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.012", 0.000", 79°) * approx speed of asteroid's shadow [km/s]: 8.9293 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4-282-214805 by 1237 Genevieve on 2023 Aug 17 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 -164 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 42 8 35 .. .. .. 42 8 6 .... -163 0 0 41 57 16 6 34 48.3 1 139 -8 42 36 37 41 19 17 42 37 8 41 18 48 .... -162 0 0 41 9 1 6 34 47.7 2 139 -9 41 47 4 40 32 14 41 47 34 40 31 46 -1.22 -161 0 0 40 23 1 6 34 46.6 3 140 -11 40 59 54 39 47 18 41 0 23 39 46 50 -1.59 -160 0 0 39 39 8 6 34 44.9 4 141 -12 40 14 58 39 4 22 40 15 27 39 3 55 -1.76 -159 0 0 38 57 16 6 34 42.6 5 141 -13 39 32 9 38 23 21 39 32 36 38 22 56 -1.85 -158 0 0 38 17 18 6 34 39.9 6 142 -14 38 51 20 37 44 11 38 51 46 37 43 46 -1.91 -157 0 0 37 39 10 6 34 36.8 7 143 -15 38 12 25 37 6 47 38 12 51 37 6 22 -1.95 -156 0 0 37 2 48 6 34 33.2 8 143 -16 37 35 20 36 31 4 37 35 46 36 30 40 -1.97 -155 0 0 36 28 8 6 34 29.2 9 144 -16 37 0 0 35 57 0 37 0 25 35 56 37 -2.00 -154 0 0 35 55 6 6 34 24.8 10 145 -17 36 26 22 35 24 32 36 26 47 35 24 9 -2.01 -153 0 0 35 23 39 6 34 20.0 11 145 -18 35 54 23 34 53 36 35 54 47 34 53 13 -2.02 -152 0 0 34 53 45 6 34 14.8 11 146 -19 35 23 58 34 24 10 35 24 22 34 23 48 -2.03 -151 0 0 34 25 21 6 34 9.3 12 146 -20 34 55 6 33 56 13 34 55 29 33 55 50 -2.04 -150 0 0 33 58 24 6 34 3.5 13 147 -21 34 27 43 33 29 40 34 28 6 33 29 18 -2.05 -149 0 0 33 32 53 6 33 57.4 14 148 -22 34 1 48 33 4 32 34 2 11 33 4 10 -2.05 -148 0 0 33 8 46 6 33 51.0 15 148 -23 33 37 19 32 40 45 33 37 41 32 40 24 -2.06 -147 0 0 32 46 1 6 33 44.3 15 149 -24 33 14 14 32 18 19 33 14 36 32 17 58 -2.06 -146 0 0 32 24 36 6 33 37.3 16 150 -25 32 52 30 31 57 12 32 52 52 31 56 51 -2.07 -145 0 0 32 4 30 6 33 30.1 17 150 -26 32 32 7 31 37 23 32 32 28 31 37 2 -2.07 -144 0 0 31 45 42 6 33 22.6 17 151 -26 32 13 3 31 18 50 32 13 24 31 18 29 -2.07 -143 0 0 31 28 10 6 33 14.9 18 152 -27 31 55 16 31 1 32 31 55 37 31 1 11 -2.07 -142 0 0 31 11 53 6 33 6.9 19 153 -28 31 38 46 30 45 28 31 39 7 30 45 7 -2.07 -141 0 0 30 56 51 6 32 58.8 19 153 -29 31 23 32 30 30 37 31 23 53 30 30 17 -2.07 -140 0 0 30 43 2 6 32 50.5 20 154 -30 31 9 32 30 16 59 31 9 53 30 16 39 -2.07 -139 0 0 30 30 26 6 32 41.9 20 155 -30 30 56 46 30 4 32 30 57 6 30 4 12 -2.08 -138 0 0 30 19 1 6 32 33.2 21 155 -31 30 45 12 29 53 16 30 45 32 29 52 56 -2.08 -137 0 0 30 8 48 6 32 24.3 21 156 -32 30 34 50 29 43 10 30 35 11 29 42 50 -2.08 -136 0 0 29 59 45 6 32 15.3 22 157 -33 30 25 40 29 34 14 30 26 0 29 33 54 -2.08 -135 0 0 29 51 51 6 32 6.1 22 158 -33 30 17 41 29 26 26 30 18 1 29 26 7 -2.08 -134 0 0 29 45 8 6 31 56.7 23 158 -34 30 10 52 29 19 48 30 11 12 29 19 28 -2.08 -133 0 0 29 39 33 6 31 47.2 23 159 -35 30 5 13 29 14 17 30 5 33 29 13 57 -2.08 -132 0 0 29 35 7 6 31 37.6 24 160 -35 30 0 43 29 9 54 30 1 3 29 9 35 -2.08 -131 0 0 29 31 49 6 31 27.9 24 161 -36 29 57 22 29 6 39 29 57 42 29 6 20 -2.08 -130 0 0 29 29 39 6 31 18.1 24 162 -36 29 55 10 29 4 31 29 55 30 29 4 12 -2.08 -129 0 0 29 28 37 6 31 8.1 24 163 -37 29 54 7 29 3 30 29 54 27 29 3 11 -2.08 -128 0 0 29 28 43 6 30 58.1 25 163 -38 29 54 13 29 3 36 29 54 33 29 3 17 -2.08 -127 0 0 29 29 56 6 30 48.0 25 164 -38 29 55 27 29 4 49 29 55 47 29 4 30 -2.08 -126 0 0 29 32 18 6 30 37.8 25 165 -39 29 57 49 29 7 9 29 58 9 29 6 50 -2.09 -125 0 0 29 35 46 6 30 27.5 25 166 -39 30 1 20 29 10 36 30 1 40 29 10 17 -2.09 -124 0 0 29 40 23 6 30 17.2 25 167 -39 30 6 0 29 15 10 30 6 20 29 14 50 -2.09 -123 0 0 29 46 7 6 30 6.8 25 168 -40 30 11 48 29 20 51 30 12 8 29 20 31 -2.09 -122 0 0 29 53 0 6 29 56.4 26 169 -40 30 18 46 29 27 39 30 19 6 29 27 19 -2.09 -121 0 0 30 1 1 6 29 45.9 26 169 -41 30 26 52 29 35 35 30 27 12 29 35 15 -2.09 -120 0 0 30 10 11 6 29 35.4 26 170 -41 30 36 8 29 44 38 30 36 29 29 44 19 -2.09 -119 0 0 30 20 30 6 29 24.9 25 171 -41 30 46 35 29 54 50 30 46 55 29 54 31 -2.10 -118 0 0 30 31 58 6 29 14.4 25 172 -41 30 58 11 30 6 11 30 58 32 30 5 51 -2.10 -117 0 0 30 44 37 6 29 3.8 25 173 -42 31 10 59 30 18 41 31 11 19 30 18 21 -2.10 -116 0 0 30 58 26 6 28 53.3 25 174 -42 31 24 58 30 32 20 31 25 19 30 32 0 -2.10 -115 0 0 31 13 26 6 28 42.8 25 175 -42 31 40 10 30 47 10 31 40 31 30 46 50 -2.10 -114 0 0 31 29 39 6 28 32.3 25 176 -42 31 56 35 31 3 11 31 56 56 31 2 50 -2.11 -113 0 0 31 47 4 6 28 21.8 25 176 -42 32 14 14 31 20 23 32 14 35 31 20 3 -2.11 -112 0 0 32 5 43 6 28 11.4 24 177 -42 32 33 8 31 38 48 32 33 29 31 38 28 -2.11 -111 0 0 32 25 37 6 28 1.1 24 178 -42 32 53 18 31 58 27 32 53 39 31 58 6 -2.12 -110 0 0 32 46 47 6 27 50.8 24 179 -42 33 14 45 32 19 20 33 15 6 32 18 59 -2.12 -109 0 0 33 9 14 6 27 40.6 23 180 -42 33 37 30 32 41 29 33 37 52 32 41 8 -2.12 -108 0 0 33 32 59 6 27 30.4 23 181 -42 34 1 36 33 4 54 34 1 58 33 4 33 -2.13 -107 0 0 33 58 4 6 27 20.4 22 182 -41 34 27 3 33 29 39 34 27 26 33 29 17 -2.13 -106 0 0 34 24 30 6 27 10.5 22 183 -41 34 53 53 33 55 42 34 54 16 33 55 20 -2.13 -105 0 0 34 52 20 6 27 0.7 22 183 -41 35 22 9 34 23 7 35 22 32 34 22 45 -2.14 -104 0 0 35 21 34 6 26 51.0 21 184 -41 35 51 52 34 51 56 35 52 16 34 51 33 -2.14 -103 0 0 35 52 16 6 26 41.4 20 185 -40 36 23 5 35 22 9 36 23 29 35 21 46 -2.15 -102 0 0 36 24 28 6 26 32.1 20 186 -40 36 55 49 35 53 50 36 56 14 35 53 26 -2.15 -101 0 0 36 58 12 6 26 22.9 19 187 -39 37 30 9 36 27 0 37 30 34 36 26 36 -2.16 -100 0 0 37 33 30 6 26 13.9 18 188 -39 38 6 7 37 1 42 38 6 33 37 1 17 -2.16 - 99 0 0 38 10 27 6 26 5.1 18 188 -38 38 43 48 37 37 59 38 44 14 37 37 34 -2.17 - 98 0 0 38 49 6 6 25 56.6 17 189 -38 39 23 14 38 15 55 39 23 41 38 15 29 -2.17 - 97 0 0 39 29 32 6 25 48.3 16 190 -37 40 4 31 38 55 32 40 4 58 38 55 6 -2.18 - 96 0 0 40 11 48 6 25 40.2 15 191 -36 40 47 44 39 36 56 40 48 12 39 36 30 -2.19 - 95 0 0 40 56 0 6 25 32.5 15 192 -36 41 32 59 40 20 11 41 33 29 40 19 44 -2.19 - 94 0 0 41 42 15 6 25 25.1 14 192 -35 42 20 24 41 5 22 42 20 55 41 4 54 -2.20 - 93 0 0 42 30 39 6 25 18.0 13 193 -34 43 10 8 41 52 36 43 10 39 41 52 7 -2.21 - 92 0 0 43 21 22 6 25 11.3 12 194 -33 44 2 19 42 41 59 44 2 51 42 41 29 -2.22 - 91 0 0 44 14 33 6 25 5.0 11 195 -32 44 57 11 43 33 40 44 57 45 43 33 9 -2.23 - 90 0 0 45 10 25 6 24 59.1 10 195 -31 45 54 59 44 27 51 45 55 34 44 27 18 -2.25 - 89 0 0 46 9 12 6 24 53.8 8 196 -30 46 56 2 45 24 42 46 56 39 45 24 8 -2.26 - 88 0 0 47 11 15 6 24 49.0 7 197 -29 48 0 44 46 24 28 48 1 23 46 23 53 -2.29 - 87 0 0 48 16 57 6 24 44.8 6 198 -28 49 9 37 47 27 31 49 10 20 47 26 54 -2.32 - 86 0 0 49 26 51 6 24 41.2 5 198 -27 50 23 27 48 34 12 50 24 13 48 33 33 -2.38 - 85 0 0 50 41 42 6 24 38.5 3 199 -25 51 43 17 49 45 6 51 44 7 49 44 24 -2.49 - 84 0 0 52 2 34 6 24 36.6 2 200 -24 53 10 46 51 0 57 53 11 42 51 0 11 -2.79 - 83 0 0 53 31 5 6 24 35.9 0 201 -22 .. .. .. 52 22 49 .. .. .. 52 21 59 -6.67 Uncertainty in time = +/- 2 secs Prediction of 2023 Aug 6.7 Data for the target star ------------------------ * name: UCAC4-282-214805 * constellation : Microscopium * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 51 48.0936 DE: -33 45 29.704 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 51 48.0935 DE: -33 45 29.705 * 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: (1237) Genevieve asteroid class: approx. diameter [km]: 40 approx. diameter ["]: 0.036 distance from Earth [AU]: 1.51660 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#60 date of fit: 2023 Jul 30 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", 0.000", 78.635° remarks: * orbital elements for (1237)Genevieve : Mean anomaly = 314.8502303074 deg Arg. of pericenter = 307.4709465567 deg Long. of node = 57.8331416808 deg Inclination = 9.7357762495 deg Eccentricity = 0.0767496030 Semimajor axis = 2.6115330767 AU Perihelion dist = 2.4110989499 AU Mag: H = 10.86, G = 0.15 Epoch of elements : MJD 60173.27041667 TDT (2023 Aug 17.2704) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#602023Jul30,4.49,2023,8,17,6.494862,-0.166693,0.885834,-4.952908,-0.932506,0.001220,0.001822,0.000001,0.000000 -109.4845,-33.6695,83.63,13.48,False UCAC4-282-214805,20.86335933,-33.7582509,0.00,12.45,0.00,0.0,0,,20.88816218,-33.6694581,2.08,0.00,0,0,0 1237,Genevieve,14.36,40.100,1.5166,0,0,-2.300,-5.40,,2.4,0 0,314.7871,2023,8,17,307.4709,57.8331,9.7358,0.07675,2.61153,2.41110,10.86,5.0,0.15 1.006,0.0123,0.0002,79,0.0123,Known errors,-1.00,0,-1,-1 20230817_214805,60162.67 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Aug 06, 16:03 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org