IOTA/IOTA-ES occultation update for (1069) Planckia / UCAC4 381-108791 event on 2023 Aug 19, 07:04 UT Visible from W Canada, W USA Summary ------- On 2023 Aug 19 UT, the 38.8 km diameter asteroid (1069) Planckia will occult a 12.4 mag star in the constellation Scutum for observers along a path across W Canada, W USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.45 mag to 14.77 mag (the magnitude of the asteroid) for at most 5.460 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 Aug 19, 06:48 - 2023 Aug 19, 07:19 * geocentric midpoint of event [JD]: 2460175.79453213 * magnitude of target star: 12.44 * magnitude drop [mag]: 2.45 * estimated maximum duration [s]: 5.460 * Moon: 8 % sunlit, 98° distance * Sun: 130° distance * rough path description: W Canada, W USA The occultation path -------------------- * approximate projected width [km]: 39 * 1 sigma uncertainty interval [path widths]: +/- 0.30 * 1 sigma uncertainty interval [seconds]: +/- 0.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.007, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.007", 0.000", 97°) * approx speed of asteroid's shadow [km/s]: 7.1098 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 381-108791 by 1069 Planckia on 2023 Aug 19 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 170 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -61 8 15 .. .. .. .... 171 0 1 -61 1 44 7 15 46.7 38 38 -16 -60 46 16 -61 17 13 -60 37 5 -61 26 25 .... 172 0 1 -60 29 33 7 15 39.7 39 37 -16 -60 13 51 -60 45 16 -60 4 33 -60 54 36 0.10 173 0 1 -59 55 57 7 15 32.3 40 36 -17 -59 40 2 -60 11 54 -59 30 35 -60 21 22 0.10 174 0 1 -59 20 53 7 15 24.6 40 35 -17 -59 4 43 -59 37 3 -58 55 8 -59 46 40 0.10 175 0 1 -58 44 15 7 15 16.6 41 35 -18 -58 27 51 -59 0 41 -58 18 7 -59 10 26 0.10 176 0 1 -58 6 1 7 15 8.1 42 34 -18 -57 49 22 -58 22 41 -57 39 29 -58 32 36 0.10 177 0 1 -57 26 5 7 14 59.2 43 33 -19 -57 9 11 -57 43 1 -56 59 9 -57 53 4 0.10 178 0 1 -56 44 23 7 14 49.8 44 32 -19 -56 27 13 -57 1 34 -56 17 2 -57 11 47 0.10 179 0 1 -56 0 50 7 14 40.0 44 31 -20 -55 43 24 -56 18 18 -55 33 3 -56 28 40 0.10 -179 59 59 -55 15 22 7 14 29.6 45 30 -21 -54 57 39 -55 33 6 -54 47 9 -55 43 38 0.10 -178 59 59 -54 27 53 7 14 18.8 46 29 -21 -54 9 54 -54 45 53 -53 59 14 -54 56 35 0.10 -177 59 59 -53 38 18 7 14 7.3 47 29 -22 -53 20 2 -53 56 35 -53 9 12 -54 7 28 0.10 -176 59 59 -52 46 33 7 13 55.3 48 28 -23 -52 28 0 -53 5 7 -52 17 0 -53 16 10 0.10 -175 59 59 -51 52 31 7 13 42.6 49 27 -23 -51 33 41 -52 11 23 -51 22 31 -52 22 36 0.10 -175 0 0 -50 56 9 7 13 29.2 51 26 -24 -50 37 2 -51 15 18 -50 25 41 -51 26 41 0.10 -174 0 0 -49 57 21 7 13 15.2 52 25 -25 -49 37 56 -50 16 47 -49 26 25 -50 28 21 0.10 -173 0 0 -48 56 1 7 13 0.4 53 24 -26 -48 36 19 -49 15 46 -48 24 38 -49 27 30 0.10 -172 0 0 -47 52 6 7 12 44.8 54 23 -26 -47 32 6 -48 12 8 -47 20 15 -48 24 3 0.10 -171 0 0 -46 45 31 7 12 28.4 55 22 -27 -46 25 13 -47 5 50 -46 13 12 -47 17 55 0.10 -170 0 0 -45 36 11 7 12 11.2 57 21 -28 -45 15 36 -45 56 47 -45 3 25 -46 9 3 0.10 -169 0 0 -44 24 2 7 11 53.1 58 20 -29 -44 3 11 -44 44 56 -43 50 49 -44 57 21 0.10 -168 0 0 -43 9 3 7 11 34.1 59 19 -30 -42 47 55 -43 30 13 -42 35 23 -43 42 48 0.10 -167 0 0 -41 51 9 7 11 14.2 61 18 -31 -41 29 45 -42 12 35 -41 17 4 -42 25 20 0.10 -166 0 0 -40 30 19 7 10 53.3 62 17 -32 -40 8 39 -40 52 1 -39 55 48 -41 4 55 0.10 -165 0 0 -39 6 31 7 10 31.4 64 16 -33 -38 44 36 -39 28 28 -38 31 37 -39 41 32 0.10 -164 0 0 -37 39 46 7 10 8.6 66 15 -33 -37 17 36 -38 1 58 -37 4 28 -38 15 10 0.10 -163 0 0 -36 10 3 7 9 44.8 67 14 -34 -35 47 40 -36 32 29 -35 34 24 -36 45 49 0.10 -162 0 0 -34 37 25 7 9 20.0 69 12 -35 -34 14 49 -35 0 4 -34 1 25 -35 13 32 0.10 -161 0 0 -33 1 54 7 8 54.2 71 11 -36 -32 39 6 -33 24 45 -32 25 36 -33 38 20 0.10 -160 0 0 -31 23 35 7 8 27.4 72 9 -37 -31 0 36 -31 46 36 -30 46 58 -32 0 18 0.10 -159 0 0 -29 42 31 7 7 59.7 74 7 -38 -29 19 22 -30 5 43 -29 5 39 -30 19 31 0.10 -158 0 0 -27 58 50 7 7 31.1 76 4 -39 -27 35 33 -28 22 11 -27 21 44 -28 36 4 0.10 -157 0 0 -26 12 40 7 7 1.6 78 1 -40 -25 49 14 -26 36 8 -25 35 21 -26 50 6 0.10 -156 0 0 -24 24 8 7 6 31.3 79 356 -41 -24 0 35 -24 47 43 -23 46 38 -25 1 45 0.09 -155 0 0 -22 33 25 7 6 0.3 81 350 -42 -22 9 47 -22 57 5 -21 55 46 -23 11 10 0.09 -154 0 0 -20 40 41 7 5 28.6 83 340 -43 -20 16 58 -21 4 26 -20 2 55 -21 18 34 0.09 -153 0 0 -18 46 8 7 4 56.4 84 326 -44 -18 22 23 -19 9 57 -18 8 17 -19 24 6 0.09 -152 0 0 -16 50 0 7 4 23.6 85 305 -45 -16 26 12 -17 13 51 -16 12 6 -17 28 1 0.09 -151 0 0 -14 52 30 7 3 50.5 85 280 -45 -14 28 41 -15 16 21 -14 14 34 -15 30 32 0.09 -150 0 0 -12 53 52 7 3 17.1 84 259 -46 -12 30 3 -13 17 43 -12 15 55 -13 31 54 0.08 -149 0 0 -10 54 20 7 2 43.5 83 245 -47 -10 30 32 -11 18 10 -10 16 25 -11 32 20 0.08 -148 0 0 - 8 54 10 7 2 9.9 81 236 -47 - 8 30 25 - 9 17 57 - 8 16 19 - 9 32 6 0.08 -147 0 0 - 6 53 38 7 1 36.3 79 230 -48 - 6 29 56 - 7 17 22 - 6 15 52 - 7 31 28 0.08 -146 0 0 - 4 52 58 7 1 2.9 77 225 -48 - 4 29 20 - 5 16 37 - 4 15 19 - 5 30 41 0.07 -145 0 0 - 2 52 26 7 0 29.7 75 222 -48 - 2 28 54 - 3 16 0 - 2 14 56 - 3 30 1 0.07 -144 0 0 - 0 52 18 6 59 57.0 73 220 -49 - 0 28 52 - 1 15 46 - 0 14 58 - 1 29 43 0.07 -143 0 0 1 7 11 6 59 24.7 71 218 -49 1 30 30 0 43 51 1 44 20 0 29 59 0.07 -142 0 0 3 5 47 6 58 53.0 69 217 -49 3 28 58 2 42 35 3 42 43 2 28 48 0.07 -141 0 0 5 3 16 6 58 22.1 67 216 -49 5 26 18 4 40 13 5 39 58 4 26 32 0.06 -140 0 0 6 59 25 6 57 51.8 65 215 -49 7 22 17 6 36 32 7 35 51 6 22 56 0.06 -139 0 0 8 54 1 6 57 22.5 63 214 -49 9 16 42 8 31 19 9 30 10 8 17 49 0.06 -138 0 0 10 46 52 6 56 54.0 61 214 -48 11 9 22 10 24 21 11 22 43 10 10 59 0.06 -137 0 0 12 37 47 6 56 26.5 59 213 -48 13 0 5 12 15 29 13 13 19 12 2 14 0.06 -136 0 0 14 26 38 6 56 0.0 57 213 -48 14 48 43 14 4 32 15 1 49 13 51 24 0.06 -135 0 0 16 13 14 6 55 34.5 55 213 -47 16 35 5 15 51 22 16 48 4 15 38 22 0.06 -134 0 0 17 57 29 6 55 10.1 53 213 -47 18 19 6 17 35 50 18 31 56 17 22 59 0.05 -133 0 0 19 39 15 6 54 46.8 51 213 -46 20 0 38 19 17 52 20 13 20 19 5 9 0.05 -132 0 0 21 18 28 6 54 24.6 49 213 -45 21 39 36 20 57 20 21 52 9 20 44 46 0.05 -131 0 0 22 55 3 6 54 3.4 47 213 -45 23 15 55 22 34 10 23 28 19 22 21 46 0.05 -130 0 0 24 28 56 6 53 43.4 45 214 -44 24 49 33 24 8 19 25 1 47 23 56 4 0.05 -129 0 0 26 0 6 6 53 24.4 44 214 -43 26 20 27 25 39 45 26 32 31 25 27 40 0.05 -128 0 0 27 28 30 6 53 6.4 42 214 -43 27 48 35 27 8 26 28 0 30 26 56 30 0.05 -127 0 0 28 54 9 6 52 49.5 40 214 -42 29 13 57 28 34 21 29 25 42 28 22 35 0.05 -126 0 0 30 17 2 6 52 33.5 39 215 -41 30 36 33 29 57 30 30 48 9 29 45 55 0.05 -125 0 0 31 37 10 6 52 18.5 37 215 -41 31 56 25 31 17 55 32 7 50 31 6 29 0.05 -124 0 0 32 54 35 6 52 4.4 36 216 -40 33 13 33 32 35 37 33 24 49 32 24 21 0.05 -123 0 0 34 9 20 6 51 51.2 34 216 -39 34 28 1 33 50 38 34 39 7 33 39 32 0.05 -122 0 0 35 21 25 6 51 38.9 33 217 -38 35 39 50 35 3 0 35 50 46 34 52 4 0.05 -121 0 0 36 30 56 6 51 27.3 31 217 -38 36 49 4 36 12 47 36 59 50 36 2 0 0.05 -120 0 0 37 37 54 6 51 16.5 30 218 -37 37 55 46 37 20 2 38 6 23 37 9 25 0.05 -119 0 0 38 42 24 6 51 6.4 29 218 -36 39 0 0 38 24 48 39 10 27 38 14 20 0.05 -118 0 0 39 44 30 6 50 57.0 28 219 -35 40 1 50 39 27 9 40 12 8 39 16 51 0.05 -117 0 0 40 44 15 6 50 48.2 26 219 -35 41 1 20 40 27 10 41 11 28 40 17 1 0.06 -116 0 0 41 41 44 6 50 40.1 25 220 -34 41 58 34 41 24 54 42 8 33 41 14 55 0.06 -115 0 0 42 37 1 6 50 32.5 24 221 -33 42 53 36 42 20 27 43 3 26 42 10 36 0.06 -114 0 0 43 30 11 6 50 25.5 23 221 -33 43 46 30 43 13 51 43 56 12 43 4 9 0.06 -113 0 0 44 21 17 6 50 19.0 22 222 -32 44 37 22 44 5 11 44 46 55 43 55 37 0.06 -112 0 0 45 10 23 6 50 13.0 21 223 -31 45 26 15 44 54 32 45 35 40 44 45 7 0.06 -111 0 0 45 57 35 6 50 7.4 20 223 -31 46 13 13 45 41 57 46 22 30 45 32 40 0.06 -110 0 0 46 42 56 6 50 2.2 19 224 -30 46 58 21 46 27 32 47 7 30 46 18 22 0.06 -109 0 0 47 26 31 6 49 57.4 18 225 -29 47 41 42 47 11 19 47 50 43 47 2 17 0.06 -108 0 0 48 8 22 6 49 53.0 17 225 -29 48 23 21 47 53 23 48 32 15 47 44 29 0.06 -107 0 0 48 48 34 6 49 49.0 16 226 -28 49 3 21 48 33 47 49 12 7 48 25 0 0.07 -106 0 1 49 27 11 6 49 45.3 15 227 -28 49 41 46 49 12 36 49 50 26 49 3 56 0.07 -105 0 1 50 4 17 6 49 41.8 14 228 -27 50 18 40 49 49 53 50 27 13 49 41 20 0.07 -104 0 1 50 39 54 6 49 38.7 13 228 -27 50 54 6 50 25 41 51 2 32 50 17 15 0.07 -103 0 1 51 14 6 6 49 35.8 12 229 -26 51 28 8 51 0 4 51 36 27 50 51 44 0.07 -102 0 1 51 46 57 6 49 33.2 11 230 -26 52 0 48 51 33 5 52 9 1 51 24 52 0.07 -101 0 1 52 18 28 6 49 30.9 11 231 -25 52 32 9 52 4 47 52 40 17 51 56 40 0.07 -100 0 1 52 48 45 6 49 28.7 10 231 -24 53 2 16 52 35 13 53 10 17 52 27 11 0.07 - 99 0 1 53 17 48 6 49 26.8 9 232 -24 53 31 10 53 4 26 53 39 6 52 56 30 0.08 - 98 0 1 53 45 41 6 49 25.0 8 233 -23 53 58 54 53 32 29 54 6 45 53 24 38 0.08 - 97 0 1 54 12 27 6 49 23.5 7 234 -23 54 25 31 53 59 23 54 33 16 53 51 37 0.08 - 96 0 1 54 38 8 6 49 22.1 7 235 -23 54 51 3 54 25 12 54 58 43 54 17 32 0.08 - 95 0 0 55 2 46 6 49 20.9 6 235 -22 55 15 33 54 49 58 55 23 8 54 42 22 0.09 - 94 0 0 55 26 23 6 49 19.8 5 236 -22 55 39 2 55 13 43 55 46 33 55 6 12 0.09 - 93 0 0 55 49 2 6 49 18.9 5 237 -21 56 1 33 55 36 30 56 9 0 55 29 3 0.09 - 92 0 0 56 10 44 6 49 18.1 4 238 -21 56 23 9 55 58 20 56 30 31 55 50 57 0.10 - 91 0 0 56 31 32 6 49 17.5 3 239 -20 56 43 50 56 19 15 56 51 7 56 11 57 0.10 - 90 0 0 56 51 28 6 49 17.0 3 240 -20 57 3 38 56 39 17 57 10 52 56 32 3 0.11 - 89 0 0 57 10 32 6 49 16.6 2 240 -19 57 22 36 56 58 28 57 29 46 56 51 18 0.13 - 88 0 0 57 28 47 6 49 16.3 1 241 -19 57 40 45 57 16 49 57 47 51 57 9 43 0.15 - 87 0 0 57 46 15 6 49 16.1 1 242 -19 57 58 7 57 34 23 58 5 9 57 27 20 0.21 - 86 0 0 58 2 56 6 49 16.0 0 243 -18 58 14 42 57 51 10 58 21 41 57 44 10 0.54 Uncertainty in time = +/- 2 secs Prediction of 2023 Aug 6.7 Data for the target star ------------------------ * name: UCAC4 381-108791 * constellation : Scutum * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 27 43.5391 DE: -13 50 08.919 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 27 43.5391 DE: -13 50 08.919 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1069) Planckia asteroid class: approx. diameter [km]: 39 approx. diameter ["]: 0.021 distance from Earth [AU]: 2.49900 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#63 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): 0.007", 0.000", 96.692° remarks: * orbital elements for (1069)Planckia : Mean anomaly = 104.8144997174 deg Arg. of pericenter = 30.9992955441 deg Long. of node = 142.3511717492 deg Inclination = 13.5616521485 deg Eccentricity = 0.1093921259 Semimajor axis = 3.1270186316 AU Perihelion dist = 2.7849474159 AU Mag: H = 9.43, G = 0.15 Epoch of elements : MJD 60175.29444445 TDT (2023 Aug 19.2944) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#632023Jul30,5.46,2023,8,19,7.068771,0.077631,-0.034975,-1.648564,-3.658696,0.004355,-0.000395,0.000001,0.000000 -156.1422,-13.8211,74.91,12.83,False UCAC4 381-108791,18.46209420,-13.8358110,0.00,12.44,0.00,0.0,0,,18.48454393,-13.8210741,2.45,0.00,0,0,0 1069,Planckia,14.77,38.800,2.4990,0,0,-0.398,-12.88,,2.6,0 0,104.7620,2023,8,19,30.9993,142.3512,13.5617,0.10939,3.12702,2.78495,9.43,5.0,0.15 1.297,0.0067,0.0002,97,0.0067,Known errors,-1.00,0,-1,-1 20230819_108791,60162.67 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Aug 06, 16:04 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org