IOTA/IOTA-ES occultation update for (94) Aurora / TYC 7386-01352-1 event on 2023 Jul 17, 06:59 UT Visible from Mexico Summary ------- On 2023 Jul 17 UT, the 185.6 km diameter asteroid (94) Aurora will occult a 11.4 mag star in the constellation Scorpius for observers along a path across Mexico. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.78 mag to 12.89 mag (the magnitude of the asteroid) for at most 16.240 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: 99 * date and approx. time of event: 2023 Jul 17, 06:53 - 2023 Jul 17, 07:04 * geocentric midpoint of event [JD]: 2460142.79115050 * magnitude of target star: 11.35 * magnitude drop [mag]: 1.78 * estimated maximum duration [s]: 16.240 * Moon: 0 % sunlit, 159° distance * Sun: 153° distance * rough path description: Mexico The occultation path -------------------- * approximate projected width [km]: 340 * 1 sigma uncertainty interval [path widths]: +/- 0.16 * 1 sigma uncertainty interval [seconds]: +/- 3.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.025, +/- 0.016) * 1 sigma uncertainty ellipse (major, minor, PA): (0.025", 0.016", 91°) * approx speed of asteroid's shadow [km/s]: 11.4310 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 7386-01352-1 by 94 Aurora on 2023 Jul 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 -169 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 49 4 59 .. .. .. 48 9 42 .... -168 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 47 58 1 .. .. .. 47 4 34 .... -167 0 0 49 54 17 7 4 18.0 0 151 0 .. .. .. 46 52 45 .. .. .. 46 0 58 .... -166 0 0 48 44 9 7 4 17.7 2 152 -1 .. .. .. 45 49 9 .. .. .. 44 58 54 -0.65 -165 0 0 47 36 13 7 4 16.8 3 153 -3 .. .. .. 44 47 8 .. .. .. 43 58 19 -1.09 -164 0 0 46 30 23 7 4 15.5 4 154 -4 49 40 53 43 46 42 50 48 58 42 59 13 -1.25 -163 0 0 45 26 33 7 4 13.7 5 154 -5 48 29 21 42 47 49 49 33 59 42 1 33 -1.34 -162 0 0 44 24 37 7 4 11.4 7 155 -6 47 20 34 41 50 25 48 22 11 41 5 18 -1.39 -161 0 0 43 24 30 7 4 8.7 8 156 -7 46 14 18 40 54 31 47 13 17 40 10 28 -1.42 -160 0 0 42 26 10 7 4 5.5 9 157 -8 45 10 23 40 0 3 46 7 2 39 17 0 -1.44 -159 0 0 41 29 32 7 4 2.0 10 157 -10 44 8 41 39 7 1 45 3 15 38 24 54 -1.46 -158 0 0 40 34 33 7 3 58.1 11 158 -11 43 9 4 38 15 23 44 1 47 37 34 9 -1.48 -157 0 0 39 41 10 7 3 53.9 12 159 -12 42 11 27 37 25 7 43 2 28 36 44 43 -1.49 -156 0 0 38 49 21 7 3 49.3 13 159 -13 41 15 44 36 36 14 42 5 13 35 56 36 -1.50 -155 0 0 37 59 4 7 3 44.5 15 160 -14 40 21 50 35 48 40 41 9 55 35 9 46 -1.50 -154 0 0 37 10 16 7 3 39.3 16 161 -15 39 29 42 35 2 26 40 16 30 34 24 13 -1.51 -153 0 0 36 22 56 7 3 33.8 17 162 -16 38 39 16 34 17 30 39 24 53 33 39 56 -1.51 -152 0 0 35 37 2 7 3 28.1 18 162 -18 37 50 29 33 33 50 38 35 1 32 56 53 -1.52 -151 0 0 34 52 31 7 3 22.1 18 163 -19 37 3 17 32 51 27 37 46 48 32 15 5 -1.52 -150 0 0 34 9 23 7 3 15.9 19 164 -20 36 17 38 32 10 19 37 0 14 31 34 29 -1.52 -149 0 0 33 27 35 7 3 9.5 20 165 -21 35 33 30 31 30 24 36 15 14 30 55 6 -1.53 -148 0 0 32 47 7 7 3 2.8 21 165 -22 34 50 50 30 51 43 35 31 45 30 16 54 -1.53 -147 0 0 32 7 58 7 2 56.0 22 166 -23 34 9 37 30 14 14 34 49 47 29 39 53 -1.53 -146 0 0 31 30 5 7 2 48.9 23 167 -24 33 29 48 29 37 56 34 9 16 29 4 2 -1.53 -145 0 0 30 53 28 7 2 41.7 24 168 -25 32 51 22 29 2 49 33 30 10 28 29 20 -1.53 -144 0 0 30 18 5 7 2 34.3 24 168 -26 32 14 17 28 28 51 32 52 29 27 55 46 -1.53 -143 0 0 29 43 56 7 2 26.8 25 169 -27 31 38 32 27 56 2 32 16 9 27 23 20 -1.54 -142 0 0 29 11 0 7 2 19.1 26 170 -28 31 4 5 27 24 22 31 41 9 26 52 1 -1.54 -141 0 0 28 39 15 7 2 11.3 26 171 -29 30 30 55 26 53 49 31 7 29 26 21 48 -1.54 -140 0 0 28 8 41 7 2 3.3 27 172 -30 29 59 0 26 24 23 30 35 6 25 52 41 -1.54 -139 0 0 27 39 17 7 1 55.3 28 173 -31 29 28 20 25 56 2 30 3 59 25 24 39 -1.54 -138 0 0 27 11 2 7 1 47.1 28 173 -32 28 58 54 25 28 48 29 34 7 24 57 42 -1.54 -137 0 0 26 43 55 7 1 38.9 29 174 -32 28 30 39 25 2 38 29 5 29 24 31 48 -1.54 -136 0 0 26 17 56 7 1 30.5 29 175 -33 28 3 37 24 37 33 28 38 4 24 6 58 -1.54 -135 0 0 25 53 3 7 1 22.1 30 176 -34 27 37 45 24 13 31 28 11 51 23 43 11 -1.54 -134 0 0 25 29 16 7 1 13.6 30 177 -35 27 13 2 23 50 32 27 46 49 23 20 26 -1.54 -133 0 0 25 6 35 7 1 5.0 31 178 -36 26 49 28 23 28 36 27 22 57 22 58 43 -1.54 -132 0 0 24 44 59 7 0 56.4 31 179 -37 26 27 3 23 7 43 27 0 14 22 38 2 -1.54 -131 0 0 24 24 27 7 0 47.7 31 180 -37 26 5 45 22 47 50 26 38 40 22 18 21 -1.54 -130 0 0 24 4 58 7 0 39.0 32 181 -38 25 45 33 22 29 0 26 18 14 21 59 41 -1.54 -129 0 0 23 46 33 7 0 30.2 32 182 -39 25 26 28 22 11 10 25 58 54 21 42 1 -1.54 -128 0 0 23 29 11 7 0 21.4 32 183 -39 25 8 28 21 54 20 25 40 41 21 25 21 -1.54 -127 0 0 23 12 51 7 0 12.6 32 184 -40 24 51 33 21 38 31 25 23 35 21 9 41 -1.54 -126 0 0 22 57 34 7 0 3.7 33 185 -41 24 35 43 21 23 41 25 7 33 20 54 59 -1.54 -125 0 0 22 43 17 6 59 54.9 33 185 -41 24 20 57 21 9 51 24 52 37 20 41 16 -1.54 -124 0 0 22 30 2 6 59 46.0 33 186 -42 24 7 14 20 57 0 24 38 45 20 28 32 -1.54 -123 0 0 22 17 48 6 59 37.2 33 187 -43 23 54 35 20 45 8 24 25 57 20 16 46 -1.54 -122 0 0 22 6 34 6 59 28.3 33 188 -43 23 42 59 20 34 14 24 14 12 20 5 58 -1.54 -121 0 0 21 56 21 6 59 19.5 33 189 -44 23 32 25 20 24 19 24 3 32 19 56 8 -1.54 -120 0 0 21 47 8 6 59 10.6 33 190 -44 23 22 53 20 15 22 23 53 54 19 47 16 -1.54 -119 0 0 21 38 55 6 59 1.8 33 191 -45 23 14 24 20 7 23 23 45 19 19 39 21 -1.54 -118 0 0 21 31 41 6 58 53.0 33 192 -45 23 6 56 20 0 21 23 37 46 19 32 23 -1.54 -117 0 0 21 25 27 6 58 44.3 33 193 -45 23 0 30 19 54 18 23 31 16 19 26 23 -1.54 -116 0 0 21 20 12 6 58 35.5 33 194 -46 22 55 6 19 49 12 23 25 48 19 21 20 -1.54 -115 0 0 21 15 57 6 58 26.9 33 195 -46 22 50 43 19 45 4 23 21 23 19 17 13 -1.54 -114 0 0 21 12 41 6 58 18.2 32 196 -46 22 47 21 19 41 53 23 17 59 19 14 4 -1.54 -113 0 0 21 10 24 6 58 9.6 32 197 -47 22 45 1 19 39 39 23 15 37 19 11 51 -1.54 -112 0 0 21 9 7 6 58 1.1 32 198 -47 22 43 41 19 38 23 23 14 17 19 10 36 -1.54 -111 0 0 21 8 49 6 57 52.6 32 198 -47 22 43 23 19 38 5 23 13 59 19 10 17 -1.54 -110 0 0 21 9 30 6 57 44.2 31 199 -47 22 44 6 19 38 44 23 14 43 19 10 56 -1.55 -109 0 0 21 11 10 6 57 35.9 31 200 -47 22 45 51 19 40 20 23 16 29 19 12 31 -1.55 -108 0 0 21 13 50 6 57 27.7 31 201 -47 22 48 37 19 42 55 23 19 18 19 15 4 -1.55 -107 0 0 21 17 29 6 57 19.5 30 202 -47 22 52 25 19 46 27 23 23 8 19 18 34 -1.55 -106 0 0 21 22 8 6 57 11.4 30 203 -47 22 57 15 19 50 57 23 28 1 19 23 1 -1.55 -105 0 0 21 27 47 6 57 3.4 29 203 -47 23 3 6 19 56 24 23 33 57 19 28 26 -1.55 -104 0 0 21 34 26 6 56 55.5 29 204 -47 23 10 0 20 2 50 23 40 56 19 34 48 -1.55 -103 0 0 21 42 6 6 56 47.7 28 205 -47 23 17 56 20 10 15 23 48 58 19 42 8 -1.55 -102 0 0 21 50 46 6 56 40.0 28 206 -47 23 26 55 20 18 39 23 58 4 19 50 27 -1.56 -101 0 0 22 0 27 6 56 32.5 27 207 -47 23 36 58 20 28 1 24 8 13 19 59 44 -1.56 -100 0 0 22 11 9 6 56 25.0 27 207 -47 23 48 3 20 38 23 24 19 28 20 9 59 -1.56 - 99 0 0 22 22 53 6 56 17.7 26 208 -46 24 0 14 20 49 44 24 31 47 20 21 14 -1.56 - 98 0 0 22 35 40 6 56 10.5 26 209 -46 24 13 28 21 2 5 24 45 11 20 33 28 -1.56 - 97 0 0 22 49 28 6 56 3.4 25 209 -46 24 27 47 21 15 27 24 59 41 20 46 42 -1.56 - 96 0 0 23 4 20 6 55 56.5 24 210 -45 24 43 12 21 29 49 25 15 17 21 0 56 -1.57 - 95 0 0 23 20 15 6 55 49.8 24 211 -45 24 59 43 21 45 13 25 32 1 21 16 11 -1.57 - 94 0 0 23 37 13 6 55 43.2 23 211 -45 25 17 20 22 1 37 25 49 51 21 32 26 -1.57 - 93 0 0 23 55 16 6 55 36.7 22 212 -44 25 36 5 22 19 4 26 8 50 21 49 42 -1.57 - 92 0 0 24 14 24 6 55 30.4 21 213 -44 25 55 57 22 37 33 26 28 58 22 8 0 -1.57 - 91 0 0 24 34 37 6 55 24.3 21 213 -43 26 16 58 22 57 6 26 50 16 22 27 20 -1.58 - 90 0 0 24 55 57 6 55 18.4 20 214 -42 26 39 9 23 17 41 27 12 44 22 47 43 -1.58 - 89 0 0 25 18 23 6 55 12.7 19 214 -42 27 2 30 23 39 21 27 36 24 23 9 10 -1.58 - 88 0 0 25 41 58 6 55 7.2 18 215 -41 27 27 2 24 2 6 28 1 16 23 31 40 -1.59 - 87 0 0 26 6 40 6 55 1.9 17 216 -41 27 52 46 24 25 56 28 27 22 23 55 15 -1.59 - 86 0 0 26 32 32 6 54 56.8 17 216 -40 28 19 43 24 50 52 28 54 42 24 19 55 -1.59 - 85 0 0 26 59 34 6 54 51.9 16 217 -39 28 47 54 25 16 55 29 23 18 24 45 41 -1.59 - 84 0 0 27 27 47 6 54 47.3 15 217 -38 29 17 21 25 44 5 29 53 11 25 12 33 -1.60 - 83 0 0 27 57 11 6 54 42.9 14 218 -38 29 48 4 26 12 23 30 24 22 25 40 33 -1.60 - 82 0 0 28 27 49 6 54 38.7 13 218 -37 30 20 5 26 41 50 30 56 52 26 9 40 -1.61 - 81 0 0 28 59 40 6 54 34.8 12 219 -36 30 53 25 27 12 27 31 30 44 26 39 56 -1.61 - 80 0 0 29 32 47 6 54 31.2 11 220 -35 31 28 6 27 44 15 32 5 58 27 11 21 -1.62 - 79 0 0 30 7 9 6 54 27.8 10 220 -34 32 4 8 28 17 14 32 42 37 27 43 57 -1.62 - 78 0 0 30 42 49 6 54 24.8 9 221 -33 32 41 34 28 51 25 33 20 41 28 17 43 -1.63 - 77 0 0 31 19 46 6 54 22.0 8 221 -32 33 20 26 29 26 49 34 0 13 28 52 41 -1.64 - 76 0 0 31 58 4 6 54 19.6 7 222 -31 34 0 44 30 3 28 34 41 16 29 28 53 -1.65 - 75 0 0 32 37 43 6 54 17.5 6 222 -30 34 42 32 30 41 21 35 23 50 30 6 17 -1.66 - 74 0 0 33 18 44 6 54 15.7 5 223 -29 35 25 50 31 20 31 36 8 0 30 44 56 -1.69 - 73 0 0 34 1 8 6 54 14.3 4 223 -28 36 10 43 32 0 58 36 53 46 31 24 50 -1.72 - 72 0 0 34 44 59 6 54 13.2 3 224 -27 36 57 11 32 42 43 37 41 13 32 6 1 -1.78 - 71 0 0 35 30 16 6 54 12.5 2 225 -26 .. .. .. 33 25 47 .. .. .. 32 48 28 -1.91 - 70 0 0 36 17 3 6 54 12.2 0 225 -25 .. .. .. 34 10 12 .. .. .. 33 32 14 -2.70 - 69 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 34 55 58 .. .. .. 34 17 20 .... - 68 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 35 3 45 .... Uncertainty in time = +/- 4 secs Prediction of 2023 May 29.0 Data for the target star ------------------------ * name: TYC 7386-01352-1 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 55 23.5677 DE: -34 26 42.240 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 55 23.5677 DE: -34 26 42.241 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (94) Aurora asteroid class: approx. diameter [km]: 186 approx. diameter ["]: 0.104 distance from Earth [AU]: 2.46150 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#118 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): 0.025", 0.016", 91.386° remarks: * orbital elements for (94)Aurora : Mean anomaly = 219.9976860566 deg Arg. of pericenter = 60.2459257923 deg Long. of node = 2.5475986153 deg Inclination = 7.9708151523 deg Eccentricity = 0.0954096087 Semimajor axis = 3.1555794315 AU Perihelion dist = 2.8545068329 AU Mag: H = 7.72, G = 0.15 Epoch of elements : MJD 60142.29104167 TDT (2023 Jul 17.2910) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1182023Apr24,16.24,2023,7,17,6.987612,0.159298,0.822648,-6.334434,1.226034,0.002425,0.000972,0.000001,0.000000 -130.4198,-34.4498,76.73,21.22,False TYC 7386-01352-1,17.92321326,-34.4450667,0.00,11.35,0.00,0.0,0,,17.94955933,-34.4498049,1.77,0.00,0,0,0 94,Aurora,12.89,185.6,2.4615,0,0,-1.828,4.38,,10.4,0 0,219.9465,2023,7,17,60.2459,2.5476,7.9708,0.09541,3.15558,2.85451,7.72,5.0,0.15 1.157,0.0253,0.0160,91,0.0163,Known errors,-1.00,-1,-1,-1 20230717_1352-1,60092.98 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 May 28, 23:36 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org