IOTA/IOTA-ES occultation update for (439) Ohio / TYC 5537-00111-1 event on 2023 Apr 09, 20:04 UT Visible from Australia, Europe Summary ------- On 2023 Apr 09 UT, the 74.3 km diameter asteroid (439) Ohio will occult a 11.4 mag star in the constellation Virgo for observers along a path across Australia, Europe. In the case of an occultation, the combined light of the asteroid and the star will drop by 2.87 mag to 14.23 mag (the magnitude of the asteroid) for at most 4.890 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 Apr 09, 19:57 - 2023 Apr 09, 20:11 * geocentric midpoint of event [JD]: 2460044.33665625 * magnitude of target star: 11.44 * magnitude drop [mag]: 2.87 * estimated maximum duration [s]: 4.890 * Moon: 85 % sunlit, 44° distance * Sun: 179° distance * rough path description: Australia, Europe The occultation path -------------------- * approximate projected width [km]: 76 * 1 sigma uncertainty interval [path widths]: +/- 0.33 * 1 sigma uncertainty interval [seconds]: +/- 1.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.024, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.024", 0.002", 92°) * approx speed of asteroid's shadow [km/s]: 15.1970 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5537-00111-1 by 439 Ohio on 2023 Apr 9 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 - 19 0 0 55 42 44 20 11 33.9 0 106 -1 .. .. .. 55 21 19 .. .. .. 55 7 0 .... - 18 0 0 55 33 1 20 11 33.9 1 106 -2 55 54 33 55 11 31 56 8 58 54 57 9 -0.02 - 17 0 0 55 22 49 20 11 33.8 1 107 -2 55 44 25 55 1 14 55 58 54 54 46 50 -0.12 - 16 0 0 55 12 8 20 11 33.7 2 108 -3 55 33 49 54 50 29 55 48 21 54 36 1 -0.16 - 15 0 0 55 0 57 20 11 33.5 2 109 -4 55 22 44 54 39 13 55 37 19 54 24 42 -0.18 - 14 0 0 54 49 17 20 11 33.3 3 110 -4 55 11 9 54 27 27 55 25 47 54 12 53 -0.19 - 13 0 0 54 37 6 20 11 33.0 4 111 -5 54 59 3 54 15 11 55 13 45 54 0 33 -0.20 - 12 0 0 54 24 24 20 11 32.7 4 111 -5 54 46 27 54 2 24 55 1 13 53 47 42 -0.21 - 11 0 0 54 11 11 20 11 32.3 5 112 -6 54 33 20 53 49 5 54 48 10 53 34 19 -0.21 - 10 0 0 53 57 26 20 11 31.9 6 113 -7 54 19 41 53 35 14 54 34 35 53 20 24 -0.22 - 9 0 0 53 43 9 20 11 31.4 6 114 -7 54 5 30 53 20 51 54 20 28 53 5 57 -0.22 - 8 0 0 53 28 19 20 11 30.9 7 115 -8 53 50 46 53 5 54 54 5 48 52 50 56 -0.22 - 7 0 0 53 12 55 20 11 30.3 7 115 -9 53 35 29 52 50 24 53 50 35 52 35 21 -0.23 - 6 0 0 52 56 57 20 11 29.6 8 116 -9 53 19 38 52 34 19 53 34 49 52 19 12 -0.23 - 5 0 0 52 40 25 20 11 28.9 9 117 -10 53 3 12 52 17 40 53 18 28 52 2 28 -0.23 - 4 0 0 52 23 17 20 11 28.1 9 118 -11 52 46 11 52 0 25 53 1 32 51 45 9 -0.23 - 3 0 0 52 5 33 20 11 27.2 10 119 -11 52 28 35 51 42 34 52 44 0 51 27 13 -0.23 - 2 0 0 51 47 13 20 11 26.3 11 119 -12 52 10 22 51 24 7 52 25 53 51 8 41 -0.23 - 1 0 0 51 28 16 20 11 25.2 12 120 -13 51 51 32 51 5 2 52 7 8 50 49 31 -0.23 0 0 0 51 8 41 20 11 24.2 12 121 -13 51 32 5 50 45 19 51 47 46 50 29 43 -0.24 1 0 0 50 48 27 20 11 23.0 13 122 -14 51 11 59 50 24 58 51 27 45 50 9 16 -0.24 2 0 0 50 27 34 20 11 21.8 14 122 -15 50 51 15 50 3 57 51 7 6 49 48 10 -0.24 3 0 0 50 6 2 20 11 20.4 14 123 -15 50 29 50 49 42 16 50 45 47 49 26 24 -0.24 4 0 0 49 43 49 20 11 19.0 15 124 -16 50 7 45 49 19 55 50 23 48 49 3 57 -0.24 5 0 0 49 20 54 20 11 17.5 16 125 -17 49 44 59 48 56 52 50 1 7 48 40 49 -0.24 6 0 0 48 57 18 20 11 15.9 17 126 -18 49 21 32 48 33 7 49 37 46 48 16 59 -0.24 7 0 0 48 32 59 20 11 14.2 17 126 -18 48 57 21 48 8 40 49 13 41 47 52 25 -0.24 8 0 0 48 7 57 20 11 12.4 18 127 -19 48 32 28 47 43 29 48 48 54 47 27 9 -0.24 9 0 0 47 42 11 20 11 10.5 19 128 -20 48 6 51 47 17 34 48 23 23 47 1 8 -0.24 10 0 0 47 15 40 20 11 8.5 20 129 -21 47 40 29 46 50 54 47 57 7 46 34 22 -0.24 11 0 0 46 48 24 20 11 6.4 21 129 -22 47 13 22 46 23 29 47 30 6 46 6 52 -0.24 12 0 0 46 20 22 20 11 4.2 21 130 -23 46 45 29 45 55 19 47 2 19 45 38 35 -0.24 13 0 0 45 51 34 20 11 1.8 22 131 -23 46 16 50 45 26 21 46 33 46 45 9 31 -0.24 14 0 0 45 21 58 20 10 59.4 23 132 -24 45 47 24 44 56 36 46 4 26 44 39 40 -0.24 15 0 0 44 51 35 20 10 56.8 24 132 -25 45 17 10 44 26 4 45 34 18 44 9 2 -0.25 16 0 0 44 20 23 20 10 54.0 25 133 -26 44 46 7 43 54 43 45 3 22 43 37 35 -0.25 17 0 0 43 48 23 20 10 51.2 26 134 -27 44 14 16 43 22 33 44 31 37 43 5 19 -0.25 18 0 0 43 15 33 20 10 48.2 27 134 -28 43 41 36 42 49 35 43 59 3 42 32 14 -0.25 19 0 0 42 41 54 20 10 45.1 28 135 -29 43 8 5 42 15 46 43 25 39 41 58 20 -0.25 20 0 0 42 7 24 20 10 41.8 28 136 -30 42 33 45 41 41 8 42 51 24 41 23 35 -0.25 21 0 0 41 32 5 20 10 38.4 29 137 -30 41 58 34 41 5 39 42 16 20 40 48 0 -0.25 22 0 0 40 55 54 20 10 34.8 30 137 -31 41 22 33 40 29 19 41 40 24 40 11 35 -0.25 23 0 0 40 18 53 20 10 31.1 31 138 -32 40 45 40 39 52 9 41 3 38 39 34 19 -0.25 24 0 0 39 41 0 20 10 27.2 32 139 -33 40 7 57 39 14 8 40 26 0 38 56 12 -0.25 25 0 0 39 2 17 20 10 23.1 33 140 -34 39 29 22 38 35 16 39 47 31 38 17 15 -0.25 26 0 0 38 22 42 20 10 18.9 34 140 -35 38 49 56 37 55 33 39 8 11 37 37 26 -0.25 27 0 0 37 42 17 20 10 14.5 35 141 -36 38 9 38 37 15 0 38 27 59 36 56 47 -0.25 28 0 0 37 1 1 20 10 9.9 36 142 -37 37 28 30 36 33 36 37 46 56 36 15 18 -0.25 29 0 0 36 18 54 20 10 5.2 37 142 -38 36 46 32 35 51 22 37 5 3 35 32 59 -0.25 30 0 0 35 35 58 20 10 0.3 38 143 -39 36 3 43 35 8 18 36 22 19 34 49 50 -0.25 31 0 0 34 52 12 20 9 55.1 39 144 -41 35 20 4 34 24 24 35 38 45 34 5 51 -0.25 32 0 0 34 7 37 20 9 49.9 40 145 -42 34 35 36 33 39 42 34 54 22 33 21 5 -0.25 33 0 0 33 22 14 20 9 44.4 42 145 -43 33 50 20 32 54 12 34 9 10 32 35 30 -0.25 34 0 0 32 36 3 20 9 38.7 43 146 -44 33 4 16 32 7 56 33 23 11 31 49 10 -0.25 35 0 0 31 49 6 20 9 32.9 44 147 -45 32 17 25 31 20 53 32 36 24 31 2 3 -0.25 36 0 0 31 1 24 20 9 26.8 45 148 -46 31 29 49 30 33 5 31 48 51 30 14 11 -0.25 37 0 0 30 12 58 20 9 20.6 46 148 -47 30 41 28 29 44 34 31 0 34 29 25 36 -0.25 38 0 0 29 23 50 20 9 14.1 47 149 -48 29 52 24 28 55 20 30 11 34 28 36 19 -0.25 39 0 0 28 34 0 20 9 7.5 48 150 -49 29 2 39 28 5 26 29 21 51 27 46 22 -0.25 40 0 0 27 43 30 20 9 0.7 49 151 -51 28 12 13 27 14 52 28 31 28 26 55 45 -0.25 41 0 0 26 52 22 20 8 53.7 51 152 -52 27 21 9 26 23 40 27 40 27 26 4 32 -0.25 42 0 0 26 0 38 20 8 46.6 52 153 -53 26 29 28 25 31 53 26 48 48 25 12 42 -0.25 43 0 0 25 8 20 20 8 39.2 53 154 -54 25 37 13 24 39 32 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44 57 14 1 43 12 25 48 -0.25 57 0 0 12 17 28 20 6 40.4 69 174 -70 12 46 11 11 48 50 13 5 26 11 29 43 -0.25 58 0 0 11 21 21 20 6 31.0 70 176 -71 11 50 0 10 52 47 12 9 12 10 33 43 -0.25 59 0 0 10 25 19 20 6 21.6 71 179 -72 10 53 54 9 56 49 11 13 3 9 37 48 -0.25 60 0 0 9 29 26 20 6 12.2 72 182 -73 9 57 56 9 1 1 10 17 2 8 42 3 -0.25 61 0 0 8 33 43 20 6 2.7 73 186 -74 9 2 8 8 5 23 9 21 11 7 46 29 -0.25 62 0 0 7 38 14 20 5 53.1 73 189 -74 8 6 34 7 10 0 8 25 33 6 51 9 -0.25 63 0 0 6 43 1 20 5 43.6 74 193 -75 7 11 15 6 14 52 7 30 10 5 56 5 -0.25 64 0 0 5 48 6 20 5 34.0 75 197 -76 6 16 13 5 20 3 6 35 5 5 1 20 -0.25 65 0 0 4 53 32 20 5 24.4 75 202 -76 5 21 33 4 25 35 5 40 20 4 6 56 -0.25 66 0 0 3 59 20 20 5 14.8 76 207 -76 4 27 14 3 31 30 4 45 57 3 12 56 -0.24 67 0 0 3 5 33 20 5 5.3 76 212 -77 3 33 21 2 37 50 3 51 59 2 19 21 -0.24 68 0 0 2 12 14 20 4 55.7 76 217 -77 2 39 54 1 44 38 2 58 27 1 26 13 -0.24 69 0 0 1 19 23 20 4 46.2 76 223 -77 1 46 56 0 51 55 2 5 24 0 33 34 -0.24 70 0 0 0 27 4 20 4 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31 -27 29 23 -0.24 119 0 0 -27 8 55 19 59 7.4 32 277 -32 -26 47 26 -27 30 22 -26 33 3 -27 44 41 -0.24 120 0 0 -27 23 39 19 59 3.7 32 277 -31 -27 2 14 -27 45 2 -26 47 54 -27 59 18 -0.24 121 0 0 -27 37 41 19 59 0.2 31 276 -30 -27 16 21 -27 59 0 -27 2 3 -28 13 15 -0.24 122 0 0 -27 51 3 19 58 56.8 30 276 -29 -27 29 46 -28 12 18 -27 15 30 -28 26 30 -0.24 123 0 0 -28 3 44 19 58 53.5 29 276 -28 -27 42 30 -28 24 55 -27 28 17 -28 39 5 -0.24 124 0 0 -28 15 44 19 58 50.3 28 275 -27 -27 54 33 -28 36 52 -27 40 23 -28 50 59 -0.24 125 0 0 -28 27 3 19 58 47.2 27 275 -26 -28 5 56 -28 48 9 -27 51 48 -29 2 14 -0.24 126 0 0 -28 37 43 19 58 44.2 26 274 -25 -28 16 39 -28 58 46 -28 2 32 -29 12 49 -0.24 127 0 0 -28 47 43 19 58 41.3 25 274 -24 -28 26 42 -29 8 43 -28 12 37 -29 22 44 -0.24 128 0 0 -28 57 4 19 58 38.5 24 273 -24 -28 36 5 -29 18 1 -28 22 2 -29 32 0 -0.25 129 0 0 -29 5 45 19 58 35.8 24 273 -23 -28 44 48 -29 26 39 -28 30 47 -29 40 38 -0.25 130 0 0 -29 13 47 19 58 33.2 23 273 -22 -28 52 53 -29 34 39 -28 38 53 -29 48 36 -0.25 131 0 0 -29 21 10 19 58 30.7 22 272 -21 -29 0 17 -29 42 0 -28 46 19 -29 55 55 -0.25 132 0 0 -29 27 54 19 58 28.4 21 272 -20 -29 7 3 -29 48 42 -28 53 6 -30 2 36 -0.25 133 0 0 -29 33 59 19 58 26.1 20 271 -19 -29 13 10 -29 54 46 -28 59 14 -30 8 39 -0.25 134 0 0 -29 39 26 19 58 23.9 19 271 -18 -29 18 38 -30 0 11 -29 4 43 -30 14 3 -0.25 135 0 0 -29 44 14 19 58 21.8 18 270 -17 -29 23 28 -30 4 58 -29 9 34 -30 18 49 -0.25 136 0 0 -29 48 23 19 58 19.7 18 270 -17 -29 27 39 -30 9 6 -29 13 45 -30 22 57 -0.25 137 0 0 -29 51 55 19 58 17.8 17 269 -16 -29 31 11 -30 12 37 -29 17 18 -30 26 26 -0.25 138 0 0 -29 54 48 19 58 16.0 16 269 -15 -29 34 5 -30 15 29 -29 20 13 -30 29 18 -0.25 139 0 0 -29 57 3 19 58 14.3 15 268 -14 -29 36 20 -30 17 43 -29 22 28 -30 31 32 -0.25 140 0 0 -29 58 39 19 58 12.7 14 268 -13 -29 37 57 -30 19 20 -29 24 6 -30 33 8 -0.25 141 0 0 -29 59 38 19 58 11.1 13 267 -12 -29 38 56 -30 20 18 -29 25 4 -30 34 6 -0.25 142 0 0 -29 59 58 19 58 9.7 12 267 -11 -29 39 16 -30 20 38 -29 25 24 -30 34 26 -0.25 143 0 0 -29 59 40 19 58 8.4 11 266 -11 -29 38 58 -30 20 20 -29 25 6 -30 34 8 -0.25 144 0 0 -29 58 43 19 58 7.1 11 266 -10 -29 38 1 -30 19 24 -29 24 9 -30 33 12 -0.25 145 0 0 -29 57 8 19 58 5.9 10 265 -9 -29 36 25 -30 17 49 -29 22 33 -30 31 38 -0.25 146 0 0 -29 54 54 19 58 4.9 9 265 -8 -29 34 11 -30 15 36 -29 20 18 -30 29 26 -0.26 147 0 0 -29 52 2 19 58 3.9 8 265 -7 -29 31 18 -30 12 45 -29 17 24 -30 26 35 -0.26 148 0 0 -29 48 31 19 58 3.1 7 264 -6 -29 27 46 -30 9 15 -29 13 51 -30 23 6 -0.26 149 0 0 -29 44 22 19 58 2.3 6 264 -5 -29 23 35 -30 5 7 -29 9 39 -30 18 59 -0.26 150 0 0 -29 39 33 19 58 1.6 5 263 -5 -29 18 44 -30 0 20 -29 4 48 -30 14 12 -0.26 151 0 0 -29 34 5 19 58 1.0 5 263 -4 -29 13 14 -29 54 53 -28 59 17 -30 8 47 -0.26 152 0 0 -29 27 57 19 58 0.6 4 262 -3 -29 7 5 -29 48 47 -28 53 6 -30 2 43 -0.27 153 0 0 -29 21 10 19 58 0.2 3 262 -2 -29 0 15 -29 42 2 -28 46 15 -29 55 59 -0.27 154 0 0 -29 13 43 19 57 59.9 2 261 -1 -28 52 46 -29 34 37 -28 38 44 -29 48 36 -0.28 155 0 0 -29 5 35 19 57 59.7 1 261 0 -28 44 36 -29 26 32 -28 30 33 -29 40 32 -0.31 156 0 0 -28 56 47 19 57 59.7 0 260 1 -28 35 45 -29 17 47 -28 21 40 -29 31 49 -0.63 Uncertainty in time = +/- 2 secs Prediction of 2023 Feb 15.9 Data for the target star ------------------------ * name: TYC 5537-00111-1 * constellation : Virgo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 13 13 22.7950 DE: -08 35 24.842 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 13 13 22.7950 DE: -08 35 24.842 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (439) Ohio asteroid class: approx. diameter [km]: 74 approx. diameter ["]: 0.046 distance from Earth [AU]: 2.20470 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#97 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): 0.024", 0.002", 92.035° remarks: * orbital elements for (439)Ohio : Mean anomaly = 106.6306894132 deg Arg. of pericenter = 244.6452639857 deg Long. of node = 201.4370369039 deg Inclination = 19.1304860339 deg Eccentricity = 0.0667035869 Semimajor axis = 3.1338681514 AU Perihelion dist = 2.9248279049 AU Mag: H = 9.89, G = 0.15 Epoch of elements : MJD 60043.83659722 TDT (2023 Apr 09.8366) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#972023Feb07,4.89,2023,4,9,20.079750,0.160845,0.173557,-6.291299,5.830550,-0.000067,0.000112,0.000001,0.000000 59.6486,-8.7148,-120.81,7.71,False TYC 5537-00111-1,13.22299862,-8.5902339,0.00,11.44,0.00,0.0,0,,13.24344130,-8.7148098,2.87,0.00,0,0,0 439,Ohio,14.23,74.3,2.2047,0,0,-1.692,23.25,,3.6,0 0,106.4821,2023,4,9,244.6453,201.4370,19.1305,0.06670,3.13387,2.92483,9.90,5.0,0.15 1.334,0.0237,0.0021,92,0.0155,Known errors,-1.00,-1,-1,-1 20230409_0111-1,59990.87 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Feb 15, 20:58 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org