IOTA/IOTA-ES occultation update for (2) Pallas / TYC 4819-02418-1 event on 2023 Apr 07, 06:26 UT Visible from W USA Summary ------- On 2023 Apr 07 UT, the 532 km diameter asteroid (2) Pallas will occult a 10.3 mag star in the constellation Monoceros for observers along a path across W USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.17 mag to 8.33 mag (the magnitude of the asteroid) for at most 20.880 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 Apr 07, 06:21 - 2023 Apr 07, 06:30 * geocentric midpoint of event [JD]: 2460041.76813721 * magnitude of target star: 10.27 * magnitude drop [mag]: 0.17 * estimated maximum duration [s]: 20.880 * Moon: 99 % sunlit, 98° distance * Sun: 93° distance * rough path description: W USA Additional comments ------------------- low mag drop The occultation path -------------------- * approximate projected width [km]: 533 * 1 sigma uncertainty interval [path widths]: +/- 0.06 * 1 sigma uncertainty interval [seconds]: +/- 1.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.037, +/- 0.015) * 1 sigma uncertainty ellipse (major, minor, PA): (0.038", 0.014", 80°) * approx speed of asteroid's shadow [km/s]: 25.4780 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 4819-02418-1 by 2 Pallas on 2023 Apr 7 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 87 0 0 -36 10 34 6 21 57.5 1 92 47 -38 34 35 -33 46 9 -38 50 38 -33 30 1 .... 88 0 0 -36 12 11 6 21 57.6 1 92 47 -38 36 8 -33 47 49 -38 52 10 -33 31 41 -0.04 89 0 0 -36 13 15 6 21 57.7 2 91 47 -38 37 10 -33 48 55 -38 53 12 -33 32 47 -0.05 90 0 0 -36 13 46 6 21 57.9 3 90 47 -38 37 41 -33 49 27 -38 53 43 -33 33 20 -0.05 91 0 0 -36 13 45 6 21 58.1 4 90 47 -38 37 40 -33 49 26 -38 53 42 -33 33 19 -0.05 92 0 0 -36 13 12 6 21 58.3 5 89 47 -38 37 8 -33 48 51 -38 53 9 -33 32 44 -0.06 93 0 0 -36 12 6 6 21 58.6 5 89 47 -38 36 4 -33 47 43 -38 52 6 -33 31 35 -0.06 94 0 0 -36 10 27 6 21 59.0 6 88 46 -38 34 28 -33 46 1 -38 50 31 -33 29 53 -0.06 95 0 0 -36 8 16 6 21 59.4 7 88 46 -38 32 22 -33 43 45 -38 48 25 -33 27 36 -0.06 96 0 0 -36 5 32 6 21 59.9 8 87 46 -38 29 43 -33 40 55 -38 45 47 -33 24 46 -0.06 97 0 0 -36 2 15 6 22 0.4 9 86 46 -38 26 33 -33 37 32 -38 42 37 -33 21 22 -0.06 98 0 0 -35 58 25 6 22 1.0 10 86 46 -38 22 51 -33 33 34 -38 38 56 -33 17 23 -0.06 99 0 0 -35 54 2 6 22 1.6 10 85 45 -38 18 37 -33 29 2 -38 34 43 -33 12 50 -0.06 100 0 0 -35 49 6 6 22 2.3 11 85 45 -38 13 51 -33 23 56 -38 29 58 -33 7 43 -0.06 101 0 0 -35 43 37 6 22 3.0 12 84 45 -38 8 32 -33 18 16 -38 24 41 -33 2 1 -0.06 102 0 0 -35 37 34 6 22 3.7 13 83 45 -38 2 42 -33 12 1 -38 18 51 -32 55 45 -0.06 103 0 0 -35 30 58 6 22 4.6 14 83 45 -37 56 18 -33 5 11 -38 12 30 -32 48 54 -0.06 104 0 0 -35 23 47 6 22 5.4 14 82 44 -37 49 22 -32 57 46 -38 5 35 -32 41 27 -0.06 105 0 0 -35 16 3 6 22 6.4 15 82 44 -37 41 53 -32 49 46 -37 58 8 -32 33 25 -0.06 106 0 0 -35 7 44 6 22 7.4 16 81 44 -37 33 51 -32 41 11 -37 50 8 -32 24 48 -0.06 107 0 0 -34 58 51 6 22 8.4 17 81 44 -37 25 16 -32 32 0 -37 41 34 -32 15 36 -0.06 108 0 0 -34 49 24 6 22 9.5 18 80 43 -37 16 7 -32 22 14 -37 32 27 -32 5 47 -0.07 109 0 0 -34 39 21 6 22 10.7 19 79 43 -37 6 24 -32 11 51 -37 22 47 -31 55 22 -0.07 110 0 0 -34 28 43 6 22 11.9 19 79 43 -36 56 7 -32 0 52 -37 12 32 -31 44 21 -0.07 111 0 0 -34 17 30 6 22 13.1 20 78 42 -36 45 16 -31 49 17 -37 1 43 -31 32 43 -0.07 112 0 0 -34 5 41 6 22 14.5 21 78 42 -36 33 50 -31 37 4 -36 50 20 -31 20 28 -0.07 113 0 0 -33 53 16 6 22 15.8 22 77 42 -36 21 49 -31 24 15 -36 38 22 -31 7 35 -0.07 114 0 0 -33 40 15 6 22 17.3 23 77 41 -36 9 13 -31 10 48 -36 25 48 -30 54 6 -0.07 115 0 0 -33 26 37 6 22 18.8 24 76 41 -35 56 1 -30 56 43 -36 12 40 -30 39 58 -0.07 116 0 0 -33 12 22 6 22 20.4 25 76 40 -35 42 14 -30 42 0 -35 58 55 -30 25 12 -0.07 117 0 0 -32 57 29 6 22 22.0 26 75 40 -35 27 50 -30 26 39 -35 44 34 -30 9 48 -0.07 118 0 0 -32 41 59 6 22 23.7 26 75 40 -35 12 49 -30 10 40 -35 29 37 -29 53 45 -0.07 119 0 0 -32 25 51 6 22 25.5 27 74 39 -34 57 12 -29 54 1 -35 14 3 -29 37 2 -0.07 120 0 0 -32 9 5 6 22 27.3 28 73 39 -34 40 57 -29 36 42 -34 57 52 -29 19 40 -0.07 121 0 0 -31 51 40 6 22 29.2 29 73 38 -34 24 5 -29 18 44 -34 41 3 -29 1 39 -0.07 122 0 0 -31 33 36 6 22 31.1 30 72 38 -34 6 35 -29 0 6 -34 23 37 -28 42 57 -0.07 123 0 0 -31 14 53 6 22 33.2 31 72 37 -33 48 26 -28 40 47 -34 5 32 -28 23 34 -0.07 124 0 0 -30 55 29 6 22 35.3 32 71 37 -33 29 38 -28 20 48 -33 46 48 -28 3 30 -0.07 125 0 0 -30 35 26 6 22 37.5 33 71 37 -33 10 11 -28 0 7 -33 27 25 -27 42 46 -0.07 126 0 0 -30 14 42 6 22 39.7 34 70 36 -32 50 5 -27 38 45 -33 7 23 -27 21 19 -0.07 127 0 0 -29 53 17 6 22 42.0 35 70 36 -32 29 19 -27 16 41 -32 46 41 -26 59 11 -0.07 128 0 0 -29 31 10 6 22 44.4 36 70 35 -32 7 52 -26 53 55 -32 25 19 -26 36 20 -0.07 129 0 0 -29 8 22 6 22 46.9 37 69 34 -31 45 44 -26 30 26 -32 3 16 -26 12 46 -0.07 130 0 0 -28 44 52 6 22 49.4 38 69 34 -31 22 56 -26 6 14 -31 40 31 -25 48 30 -0.07 131 0 0 -28 20 40 6 22 52.1 39 68 33 -30 59 25 -25 41 19 -31 17 6 -25 23 30 -0.07 132 0 0 -27 55 45 6 22 54.8 40 68 33 -30 35 13 -25 15 40 -30 52 59 -24 57 46 -0.07 133 0 0 -27 30 7 6 22 57.6 40 67 32 -30 10 19 -24 49 17 -30 28 9 -24 31 19 -0.07 134 0 0 -27 3 45 6 23 0.4 41 67 32 -29 44 42 -24 22 11 -30 2 37 -24 4 7 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6 10 49 12 28 25 5 49 50 12 49 34 -0.06 -174 0 0 10 9 7 6 27 12.2 74 218 -11 7 0 58 13 17 59 6 40 1 13 39 7 -0.06 -173 0 0 10 58 40 6 27 17.7 73 219 -12 7 50 50 14 7 12 7 29 55 14 28 17 -0.06 -172 0 0 11 47 51 6 27 23.1 72 220 -12 8 40 23 14 56 1 8 19 31 15 17 4 -0.06 -171 0 0 12 36 40 6 27 28.4 71 221 -13 9 29 36 15 44 25 9 8 46 16 5 25 -0.06 -170 0 0 13 25 3 6 27 33.7 69 222 -14 10 18 25 16 32 21 9 57 38 16 53 18 -0.06 -169 0 0 14 12 59 6 27 38.8 68 223 -15 11 6 50 17 19 48 10 46 6 17 40 42 -0.06 -168 0 0 15 0 27 6 27 44.0 67 223 -16 11 54 48 18 6 45 11 34 7 18 27 35 -0.06 -167 0 0 15 47 24 6 27 49.0 66 224 -17 12 42 18 18 53 9 12 21 40 19 13 55 -0.05 -166 0 0 16 33 49 6 27 53.9 64 225 -17 13 29 17 19 38 59 13 8 44 19 59 41 -0.05 -165 0 0 17 19 41 6 27 58.8 63 225 -18 14 15 45 20 24 14 13 55 15 20 44 52 -0.05 -164 0 0 18 4 58 6 28 3.6 62 226 -19 15 1 39 21 8 52 14 41 14 21 29 26 -0.05 -163 0 0 18 49 38 6 28 8.2 61 226 -20 15 47 0 21 52 53 15 26 39 22 13 22 -0.05 -162 0 0 19 33 42 6 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18 -0.05 -149 0 0 28 3 46 6 29 3.6 45 234 -29 25 12 1 30 55 59 24 52 53 31 15 14 -0.05 -148 0 0 28 37 54 6 29 6.9 44 234 -29 25 46 59 31 29 17 25 27 57 31 48 27 -0.05 -147 0 0 29 11 18 6 29 10.0 43 235 -30 26 21 13 32 1 50 26 2 16 32 20 54 -0.05 -146 0 0 29 43 57 6 29 13.1 42 236 -30 26 54 42 32 33 39 26 35 50 32 52 37 -0.05 -145 0 0 30 15 51 6 29 16.0 41 236 -31 27 27 26 33 4 44 27 8 40 33 23 36 -0.05 -144 0 0 30 47 1 6 29 18.9 40 237 -31 27 59 25 33 35 4 27 40 45 33 53 51 -0.05 -143 0 0 31 17 27 6 29 21.6 39 237 -32 28 30 41 34 4 41 28 12 6 34 23 22 -0.05 -142 0 0 31 47 9 6 29 24.3 38 238 -32 29 1 11 34 33 34 28 42 42 34 52 9 -0.05 -141 0 0 32 16 8 6 29 26.9 37 238 -33 29 30 58 35 1 43 29 12 34 35 20 13 -0.05 -140 0 0 32 44 23 6 29 29.4 36 239 -33 30 0 1 35 29 10 29 41 42 35 47 35 -0.05 -139 0 0 33 11 55 6 29 31.9 35 240 -34 30 28 20 35 55 54 30 10 6 36 14 14 -0.05 -138 0 0 33 38 44 6 29 34.2 34 240 -34 30 55 56 36 21 56 30 37 47 36 40 10 -0.05 -137 0 0 34 4 50 6 29 36.5 33 241 -34 31 22 48 36 47 16 31 4 45 37 5 25 -0.05 -136 0 0 34 30 15 6 29 38.7 32 241 -35 31 48 58 37 11 55 31 31 0 37 29 59 -0.05 -135 0 0 34 54 57 6 29 40.8 31 242 -35 32 14 26 37 35 53 31 56 33 37 53 52 -0.05 -134 0 0 35 18 59 6 29 42.8 30 242 -35 32 39 11 37 59 10 32 21 23 38 17 4 -0.05 -133 0 0 35 42 19 6 29 44.8 29 243 -36 33 3 15 38 21 47 32 45 32 38 39 36 -0.05 -132 0 0 36 4 59 6 29 46.7 28 244 -36 33 26 37 38 43 45 33 8 59 39 1 29 -0.05 -131 0 0 36 26 59 6 29 48.5 27 244 -36 33 49 19 39 5 3 33 31 45 39 22 42 -0.05 -130 0 0 36 48 20 6 29 50.3 27 245 -37 34 11 20 39 25 42 33 53 50 39 43 17 -0.05 -129 0 0 37 9 1 6 29 51.9 26 246 -37 34 32 41 39 45 43 34 15 16 40 3 14 -0.05 -128 0 0 37 29 3 6 29 53.6 25 246 -37 34 53 22 40 5 6 34 36 1 40 22 32 -0.05 -127 0 0 37 48 27 6 29 55.1 24 247 -37 35 13 24 40 23 52 34 56 7 40 41 14 -0.05 -126 0 0 38 7 13 6 29 56.6 23 247 -38 35 32 47 40 42 1 35 15 34 40 59 18 -0.05 -125 0 0 38 25 21 6 29 58.0 22 248 -38 35 51 31 40 59 33 35 34 23 41 16 46 -0.05 -124 0 0 38 42 52 6 29 59.4 21 249 -38 36 9 37 41 16 29 35 52 33 41 33 38 -0.05 -123 0 0 38 59 47 6 30 0.7 21 249 -38 36 27 6 41 32 49 36 10 5 41 49 55 -0.05 -122 0 0 39 16 5 6 30 1.9 20 250 -39 36 43 57 41 48 34 36 27 0 42 5 36 -0.05 -121 0 0 39 31 47 6 30 3.1 19 251 -39 37 0 12 42 3 44 36 43 18 42 20 42 -0.05 -120 0 0 39 46 54 6 30 4.2 18 251 -39 37 15 50 42 18 19 36 59 0 42 35 14 -0.05 -119 0 0 40 1 26 6 30 5.3 17 252 -39 37 30 51 42 32 21 37 14 5 42 49 12 -0.05 -118 0 0 40 15 23 6 30 6.3 16 253 -39 37 45 17 42 45 49 37 28 34 43 2 37 -0.05 -117 0 0 40 28 45 6 30 7.3 16 253 -39 37 59 7 42 58 43 37 42 27 43 15 28 -0.05 -116 0 0 40 41 33 6 30 8.2 15 254 -40 38 12 23 43 11 5 37 55 46 43 27 47 -0.05 -115 0 0 40 53 48 6 30 9.1 14 254 -40 38 25 3 43 22 53 38 8 29 43 39 33 -0.05 -114 0 0 41 5 30 6 30 9.9 13 255 -40 38 37 9 43 34 10 38 20 38 43 50 46 -0.05 -113 0 0 41 16 38 6 30 10.6 13 256 -40 38 48 41 43 44 55 38 32 12 44 1 28 -0.05 -112 0 0 41 27 14 6 30 11.3 12 256 -40 38 59 40 43 55 8 38 43 13 44 11 39 -0.05 -111 0 0 41 37 17 6 30 12.0 11 257 -40 39 10 4 44 4 49 38 53 40 44 21 18 -0.05 -110 0 0 41 46 48 6 30 12.6 10 258 -40 39 19 56 44 14 0 39 3 34 44 30 26 -0.05 -109 0 0 41 55 47 6 30 13.2 9 258 -40 39 29 14 44 22 39 39 12 55 44 39 4 -0.05 -108 0 0 42 4 15 6 30 13.7 9 259 -40 39 38 0 44 30 49 39 21 43 44 47 11 -0.05 -107 0 0 42 12 11 6 30 14.2 8 260 -40 39 46 14 44 38 28 39 29 58 44 54 48 -0.05 -106 0 0 42 19 36 6 30 14.6 7 260 -40 39 53 55 44 45 37 39 37 41 45 1 55 -0.05 -105 0 0 42 26 30 6 30 15.0 6 261 -40 40 1 4 44 52 16 39 44 52 45 8 33 -0.05 -104 0 0 42 32 53 6 30 15.4 6 262 -40 40 7 41 44 58 25 39 51 30 45 14 41 -0.06 -103 0 0 42 38 46 6 30 15.7 5 262 -40 40 13 47 45 4 5 39 57 38 45 20 19 -0.06 -102 0 0 42 44 9 6 30 15.9 4 263 -40 40 19 21 45 9 16 40 3 13 45 25 29 -0.06 -101 0 0 42 49 1 6 30 16.1 3 264 -40 40 24 24 45 13 58 40 8 17 45 30 9 -0.06 -100 0 0 42 53 24 6 30 16.3 3 265 -40 40 28 56 45 18 11 40 12 50 45 34 21 -0.06 - 99 0 0 42 57 16 6 30 16.4 2 265 -40 40 32 57 45 21 55 40 16 52 45 38 4 -0.06 - 98 0 0 43 0 39 6 30 16.5 1 266 -40 40 36 27 45 25 10 40 20 23 45 41 19 -0.06 - 97 0 0 43 3 32 6 30 16.6 1 267 -40 40 39 27 45 27 57 40 23 23 45 44 5 -0.07 Uncertainty in time = +/- 2 secs Prediction of 2023 Feb 15.9 Data for the target star ------------------------ * name: TYC 4819-02418-1 * constellation : Monoceros * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 07 13 09.1732 DE: -02 08 48.252 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 07 13 09.1731 DE: -02 08 48.252 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.300) * V mag [mag]: 10.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2) Pallas asteroid class: ShapeModel approx. diameter [km]: 532 approx. diameter ["]: 0.399 distance from Earth [AU]: 1.84000 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 date of fit: 2023 Feb 07 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): 0.038", 0.014", 80.48° remarks: * orbital elements for (2)Pallas : Mean anomaly = 6.6714533266 deg Arg. of pericenter = 310.8674588404 deg Long. of node = 172.9185370290 deg Inclination = 34.9267985121 deg Eccentricity = 0.2301248714 Semimajor axis = 2.7697791604 AU Perihelion dist = 2.1323840874 AU Mag: H = 4.12, G = 0.11 Epoch of elements : MJD 60041.26812500 TDT (2023 Apr 07.2681) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Feb07,20.88,2023,4,7,6.435293,-0.038544,0.046561,11.101955,9.140302,0.005324,-0.000618,0.000000,-0.000001 176.7746,-2.1876,84.04,6.75,False TYC 4819-02418-1,7.21921480,-2.1467367,0.00,10.27,0.00,0.0,0,,7.23860260,-2.1875753,0.17,0.00,0,0,0 2,Pallas,8.33,532.0,1.8400,0,0,3.540,43.68,,28.2,0 0,6.6141,2023,4,7,310.8675,172.9185,34.9268,0.23012,2.76978,2.13238,4.12,5.0,0.15 1.056,0.0377,0.0137,80,0.0222,Known errors,-1.00,-1,-1,-1 20230407_2418-1,59990.87 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Feb 15, 20:57 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org