IOTA/IOTA-ES occultation update for (246) Asporina / UCAC4 395-083373 event on 2023 Sep 22, 02:42 UT Visible from USA, W Canada Summary ------- On 2023 Sep 22 UT, the 57.1 km diameter asteroid (246) Asporina will occult a 12.0 mag star in the constellation Scutum for observers along a path across USA, W Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.47 mag to 13.18 mag (the magnitude of the asteroid) for at most 3.440 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 Sep 22, 02:39 - 2023 Sep 22, 02:46 * geocentric midpoint of event [JD]: 2460209.61307838 * magnitude of target star: 12.04 * magnitude drop [mag]: 1.47 * estimated maximum duration [s]: 3.440 * Moon: 42 % sunlit, 24° distance * Sun: 99° distance * rough path description: USA, W Canada Additional comments ------------------- RUWE, double star The occultation path -------------------- * approximate projected width [km]: 103 * 1 sigma uncertainty interval [path widths]: +/- 0.10 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.009", 0.001", 93°) * approx speed of asteroid's shadow [km/s]: 16.5757 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 395-083373 by 246 Asporina on 2023 Sep 22 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 -152 0 0 .. .. .... .. .. .. .. .. .. 77 17 6 .. .. .. 77 5 36 .. .. .. .... -151 0 0 .. .. .... .. .. .. .. .. .. 76 52 36 .. .. .. 76 40 59 .. .. .. .... -150 0 2 77 26 14 2 39 17.4 0 153 4 76 27 2 .. .. .. 76 15 19 .. .. .. .... -149 0 2 77 0 3 2 39 17.4 1 154 4 76 0 22 .. .. .. 75 48 35 .. .. .. -0.60 -148 0 2 76 32 41 2 39 17.5 1 155 4 75 32 36 77 36 33 75 20 44 .. .. .. -0.99 -147 0 2 76 4 8 2 39 17.7 2 156 4 75 3 42 77 8 24 74 51 46 77 22 5 -1.15 -146 0 2 75 34 22 2 39 17.9 2 157 4 74 33 40 76 38 59 74 21 41 76 52 45 -1.23 -145 0 2 75 3 25 2 39 18.2 3 158 4 74 2 30 76 8 17 73 50 28 76 22 6 -1.28 -144 0 2 74 31 14 2 39 18.6 3 159 4 73 30 11 75 36 17 73 18 8 75 50 8 -1.31 -143 0 2 73 57 51 2 39 19.1 4 160 4 72 56 43 75 2 59 72 44 39 75 16 51 -1.33 -142 0 2 73 23 16 2 39 19.6 5 161 3 72 22 7 74 28 23 72 10 4 74 42 16 -1.35 -141 0 2 72 47 29 2 39 20.3 5 162 3 71 46 25 73 52 32 71 34 22 74 6 22 -1.37 -140 0 2 72 10 33 2 39 21.1 6 163 3 71 9 37 73 15 25 70 57 35 73 29 13 -1.38 -139 0 2 71 32 28 2 39 22.1 7 164 3 70 31 45 72 37 5 70 19 46 72 50 49 -1.39 -138 0 2 70 53 17 2 39 23.1 7 165 3 69 52 51 71 57 33 69 40 55 72 11 14 -1.40 -137 0 2 70 13 3 2 39 24.4 8 166 2 69 12 57 71 16 54 69 1 5 71 30 29 -1.40 -136 0 1 69 31 48 2 39 25.7 9 167 2 68 32 6 70 35 10 68 20 18 70 48 37 -1.41 -135 0 1 68 49 34 2 39 27.3 10 168 2 67 50 20 69 52 23 67 38 37 70 5 44 -1.41 -134 0 1 68 6 27 2 39 29.0 10 169 1 67 7 43 69 8 39 66 56 5 69 21 51 -1.42 -133 0 1 67 22 28 2 39 30.9 11 170 1 66 24 17 68 24 1 66 12 46 68 37 3 -1.42 -132 0 1 66 37 41 2 39 32.9 12 171 1 65 40 6 67 38 32 65 28 42 67 51 25 -1.43 -131 0 1 65 52 12 2 39 35.2 13 172 0 64 55 14 66 52 17 64 43 57 67 5 0 -1.43 -130 0 1 65 6 2 2 39 37.6 14 173 0 64 9 45 66 5 21 63 58 35 66 17 53 -1.43 -129 0 1 64 19 17 2 39 40.2 15 174 -1 63 23 41 65 17 47 63 12 39 65 30 9 -1.44 -128 0 1 63 32 1 2 39 43.0 15 175 -1 62 37 8 64 29 41 62 26 14 64 41 51 -1.44 -127 0 1 62 44 17 2 39 46.0 16 176 -2 61 50 8 63 41 6 61 39 22 63 53 5 -1.44 -126 0 1 61 56 10 2 39 49.2 17 177 -2 61 2 45 62 52 8 60 52 7 63 3 55 -1.44 -125 0 1 61 7 43 2 39 52.7 18 178 -3 60 15 4 62 2 49 60 4 35 62 14 25 -1.45 -124 0 1 60 19 2 2 39 56.3 19 179 -3 59 27 7 61 13 16 59 16 47 61 24 40 -1.45 -123 0 1 59 30 8 2 40 0.1 19 180 -4 58 38 59 60 23 31 58 28 47 60 34 43 -1.45 -122 0 1 58 41 7 2 40 4.1 20 181 -5 57 50 43 59 33 38 57 40 40 59 44 39 -1.45 -121 0 1 57 52 2 2 40 8.2 21 182 -5 57 2 23 58 43 41 56 52 28 58 54 31 -1.45 -120 0 1 57 2 56 2 40 12.6 22 183 -6 56 14 2 57 53 45 56 4 16 58 4 23 -1.46 -119 0 1 56 13 53 2 40 17.2 23 184 -7 55 25 44 57 3 52 55 16 6 57 14 20 -1.46 -118 0 1 55 24 56 2 40 21.9 23 185 -7 54 37 31 56 14 7 54 28 2 56 24 24 -1.46 -117 0 1 54 36 9 2 40 26.8 24 186 -8 53 49 27 55 24 32 53 40 6 55 34 38 -1.46 -116 0 1 53 47 35 2 40 31.9 25 187 -9 53 1 35 54 35 10 52 52 22 54 45 6 -1.46 -115 0 1 52 59 16 2 40 37.1 26 189 -10 52 13 58 53 46 5 52 4 53 53 55 51 -1.46 -114 0 1 52 11 15 2 40 42.5 26 190 -11 51 26 38 52 57 19 51 17 41 53 6 55 -1.47 -113 0 1 51 23 35 2 40 48.0 27 191 -11 50 39 38 52 8 56 50 30 49 52 18 22 -1.47 -112 0 1 50 36 19 2 40 53.6 28 192 -12 49 53 1 51 20 57 49 44 19 51 30 14 -1.47 -111 0 1 49 49 29 2 40 59.4 28 193 -13 49 6 48 50 33 24 48 58 14 50 42 33 -1.47 -110 0 1 49 3 6 2 41 5.3 29 195 -14 48 21 3 49 46 21 48 12 36 49 55 21 -1.47 -109 0 1 48 17 14 2 41 11.4 29 196 -15 47 35 47 48 59 50 47 27 27 49 8 41 -1.48 -108 0 1 47 31 54 2 41 17.5 30 197 -16 46 51 2 48 13 52 46 42 49 48 22 35 -1.48 -107 0 1 46 47 8 2 41 23.7 30 198 -17 46 6 50 47 28 29 45 58 44 47 37 5 -1.48 -106 0 1 46 2 59 2 41 30.0 31 200 -17 45 23 14 46 43 44 45 15 14 46 52 11 -1.48 -105 0 1 45 19 26 2 41 36.4 31 201 -18 44 40 14 45 59 37 44 32 20 46 7 57 -1.48 -104 0 1 44 36 33 2 41 42.9 32 202 -19 43 57 52 45 16 11 43 50 4 45 24 23 -1.48 -103 0 1 43 54 21 2 41 49.4 32 204 -20 43 16 10 44 33 26 43 8 28 44 41 32 -1.49 -102 0 1 43 12 51 2 41 55.9 32 205 -21 42 35 9 43 51 24 42 27 33 43 59 23 -1.49 -101 0 1 42 32 3 2 42 2.6 33 206 -22 41 54 50 43 10 6 41 47 19 43 17 59 -1.49 -100 0 1 41 52 0 2 42 9.2 33 208 -23 41 15 14 42 29 34 41 7 49 42 37 20 -1.49 - 99 0 1 41 12 43 2 42 15.9 33 209 -24 40 36 23 41 49 48 40 29 3 41 57 28 -1.49 - 98 0 1 40 34 11 2 42 22.6 33 210 -25 39 58 18 41 10 49 39 51 3 41 18 24 -1.49 - 97 0 1 39 56 27 2 42 29.3 33 212 -26 39 20 58 40 32 39 39 13 48 40 40 8 -1.50 - 96 0 1 39 19 31 2 42 36.0 34 213 -27 38 44 26 39 55 18 38 37 21 40 2 41 -1.50 - 95 0 1 38 43 24 2 42 42.7 34 214 -28 38 8 42 39 18 46 38 1 42 39 26 5 -1.50 - 94 0 1 38 8 6 2 42 49.4 34 215 -29 37 33 47 38 43 5 37 26 51 38 50 18 -1.50 - 93 0 1 37 33 39 2 42 56.1 34 217 -30 36 59 41 38 8 14 36 52 49 38 15 23 -1.50 - 92 0 1 37 0 2 2 43 2.7 34 218 -31 36 26 24 37 34 15 36 19 37 37 41 19 -1.50 - 91 0 1 36 27 16 2 43 9.4 34 219 -32 35 53 59 37 1 8 35 47 15 37 8 8 -1.50 - 90 0 0 35 55 22 2 43 15.9 33 221 -33 35 22 24 36 28 54 35 15 44 36 35 49 -1.51 - 89 0 0 35 24 19 2 43 22.5 33 222 -34 34 51 40 35 57 32 34 45 4 36 4 23 -1.51 - 88 0 0 34 54 10 2 43 28.9 33 223 -35 34 21 48 35 27 3 34 15 15 35 33 51 -1.51 - 87 0 0 34 24 52 2 43 35.4 33 224 -36 33 52 48 34 57 28 33 46 19 35 4 12 -1.51 - 86 0 0 33 56 28 2 43 41.7 33 225 -37 33 24 40 34 28 47 33 18 14 34 35 27 -1.51 - 85 0 0 33 28 57 2 43 48.0 32 227 -38 32 57 25 34 0 59 32 51 2 34 7 35 -1.51 - 84 0 0 33 2 19 2 43 54.2 32 228 -39 32 31 2 33 34 5 32 24 42 33 40 38 -1.51 - 83 0 0 32 36 35 2 44 0.4 32 229 -40 32 5 32 33 8 5 31 59 15 33 14 35 -1.51 - 82 0 0 32 11 44 2 44 6.4 31 230 -41 31 40 55 32 43 0 31 34 41 32 49 27 -1.52 - 81 0 0 31 47 47 2 44 12.4 31 231 -42 31 17 12 32 18 49 31 11 0 32 25 13 -1.52 - 80 0 0 31 24 43 2 44 18.2 30 232 -43 30 54 21 31 55 32 30 48 12 32 1 53 -1.52 - 79 0 0 31 2 34 2 44 24.0 30 233 -44 30 32 24 31 33 10 30 26 17 31 39 28 -1.52 - 78 0 0 30 41 18 2 44 29.7 29 234 -44 30 11 19 31 11 42 30 5 15 31 17 58 -1.52 - 77 0 0 30 20 56 2 44 35.3 29 235 -45 29 51 9 30 51 8 29 45 6 30 57 22 -1.52 - 76 0 0 30 1 28 2 44 40.7 28 236 -46 29 31 51 30 31 29 29 25 51 30 37 40 -1.52 - 75 0 0 29 42 53 2 44 46.1 28 237 -47 29 13 26 30 12 44 29 7 28 30 18 53 -1.52 - 74 0 0 29 25 12 2 44 51.3 27 238 -48 28 55 55 29 54 53 28 49 59 30 1 0 -1.52 - 73 0 0 29 8 25 2 44 56.4 27 238 -49 28 39 17 29 37 57 28 33 22 29 44 2 -1.52 - 72 0 0 28 52 31 2 45 1.4 26 239 -50 28 23 31 29 21 54 28 17 39 29 27 57 -1.52 - 71 0 0 28 37 31 2 45 6.2 25 240 -51 28 8 39 29 6 46 28 2 48 29 12 47 -1.53 - 70 0 0 28 23 24 2 45 11.0 25 241 -51 27 54 40 28 52 31 27 48 50 28 58 31 -1.53 - 69 0 0 28 10 11 2 45 15.6 24 242 -52 27 41 34 28 39 10 27 35 45 28 45 9 -1.53 - 68 0 0 27 57 50 2 45 20.0 23 242 -53 27 29 20 28 26 43 27 23 33 28 32 40 -1.53 - 67 0 0 27 46 23 2 45 24.4 23 243 -54 27 17 59 28 15 10 27 12 13 28 21 5 -1.53 - 66 0 0 27 35 49 2 45 28.5 22 244 -54 27 7 30 28 4 30 27 1 46 28 10 24 -1.53 - 65 0 0 27 26 8 2 45 32.6 21 244 -55 26 57 54 27 54 43 26 52 11 28 0 36 -1.53 - 64 0 0 27 17 19 2 45 36.5 20 245 -56 26 49 10 27 45 49 26 43 28 27 51 41 -1.53 - 63 0 0 27 9 23 2 45 40.3 20 246 -57 26 41 19 27 37 49 26 35 37 27 43 40 -1.53 - 62 0 0 27 2 20 2 45 43.9 19 246 -57 26 34 19 27 30 42 26 28 39 27 36 32 -1.53 - 61 0 0 26 56 9 2 45 47.4 18 247 -58 26 28 12 27 24 27 26 22 32 27 30 17 -1.53 - 60 0 0 26 50 51 2 45 50.7 17 248 -58 26 22 57 27 19 6 26 17 17 27 24 55 -1.54 - 59 0 0 26 46 24 2 45 53.8 16 248 -59 26 18 33 27 14 37 26 12 54 27 20 25 -1.54 - 58 0 0 26 42 50 2 45 56.8 16 249 -59 26 15 1 27 11 0 26 9 22 27 16 48 -1.54 - 57 0 0 26 40 8 2 45 59.7 15 249 -60 26 12 20 27 8 16 26 6 42 27 14 3 -1.54 - 56 0 0 26 38 18 2 46 2.4 14 250 -60 26 10 31 27 6 24 26 4 53 27 12 11 -1.54 - 55 0 0 26 37 19 2 46 4.9 13 250 -61 26 9 34 27 5 25 26 3 56 27 11 11 -1.54 - 54 0 0 26 37 12 2 46 7.3 12 251 -61 26 9 27 27 5 17 26 3 50 27 11 4 -1.55 - 53 0 0 26 37 56 2 46 9.5 11 251 -61 26 10 12 27 6 1 26 4 34 27 11 48 -1.55 - 52 0 0 26 39 32 2 46 11.6 10 252 -62 26 11 48 27 7 38 26 6 10 27 13 24 -1.55 - 51 0 0 26 42 0 2 46 13.5 10 252 -62 26 14 14 27 10 6 26 8 37 27 15 53 -1.56 - 50 0 0 26 45 18 2 46 15.2 9 253 -62 26 17 32 27 13 25 26 11 54 27 19 13 -1.56 - 49 0 0 26 49 28 2 46 16.8 8 253 -62 26 21 40 27 17 37 26 16 2 27 23 24 -1.57 - 48 0 0 26 54 29 2 46 18.2 7 254 -62 26 26 39 27 22 39 26 21 1 27 28 27 -1.58 - 47 0 0 27 0 21 2 46 19.4 6 254 -62 26 32 29 27 28 34 26 26 50 27 34 22 -1.59 - 46 0 0 27 7 4 2 46 20.5 5 255 -62 26 39 9 27 35 19 26 33 29 27 41 8 -1.61 - 45 0 0 27 14 37 2 46 21.4 4 255 -62 26 46 39 27 42 56 26 40 59 27 48 46 -1.63 - 44 0 0 27 23 1 2 46 22.1 3 256 -62 26 55 0 27 51 24 26 49 19 27 57 14 -1.66 - 43 0 0 27 32 16 2 46 22.6 2 256 -62 27 4 11 28 0 43 26 58 29 28 6 34 -1.72 - 42 0 0 27 42 22 2 46 23.0 2 257 -62 27 14 12 28 10 53 27 8 30 28 16 45 -1.85 - 41 0 0 27 53 18 2 46 23.2 1 257 -62 27 25 4 28 21 54 27 19 20 28 27 47 -2.35 Uncertainty in time = +/- 1 secs Prediction of 2023 Aug 27.0 Data for the target star ------------------------ * name: UCAC4 395-083373 * constellation : Scutum * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 30 41.2999 DE: -11 08 33.933 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 30 41.2995 DE: -11 08 33.933 * position source: Gaia DR3 * standard error: RA,DE [mas]: (1.100,0.900) * V mag [mag]: 12.0 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (246) Asporina asteroid class: approx. diameter [km]: 57 approx. diameter ["]: 0.037 distance from Earth [AU]: 2.09960 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#75 date of fit: 2023 Aug 22 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): 0.009", 0.001", 93.182° remarks: * orbital elements for (246)Asporina : Mean anomaly = 34.4017114845 deg Arg. of pericenter = 96.2085466143 deg Long. of node = 162.2721531742 deg Inclination = 15.6214339032 deg Eccentricity = 0.1084779579 Semimajor axis = 2.6938758910 AU Perihelion dist = 2.4016497354 AU Mag: H = 8.67, G = 0.15 Epoch of elements : MJD 60209.11312500 TDT (2023 Sep 22.1131) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#752023Aug22,3.44,2023,9,22,2.713881,0.388111,0.734321,8.278171,-4.359234,0.005514,0.000136,0.000000,0.000000 -123.4195,-11.1260,137.53,0.45,False UCAC4 395-083373,18.51147223,-11.1427592,0.00,12.04,0.00,0.0,0,,18.53336402,-11.1260301,1.47,0.00,0,0,0 246,Asporina,13.18,57.100,2.0996,0,0,2.357,-18.25,,3.0,0 0,34.3765,2023,9,22,96.2085,162.2722,15.6214,0.10848,2.69388,2.40165,8.50,5.0,0.15 1.102,0.0087,0.0013,93,0.0088,Known errors,-1.00,0,-1,-1 20230922_083373,60182.99 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Aug 26, 23:47 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org