IOTA/IOTA-ES occultation update for (9037) 1990 UJ2 / UCAC4 345-196642 event on 2024 Oct 02, 02:16 UT Visible from Summary ------- On 2024 Oct 02 UT, the 9.753 km diameter asteroid (9037) 1990 UJ2 will occult a 10.4 mag star in the constellation Capricornus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.07 mag to 17.48 mag (the magnitude of the asteroid) for at most 1.350 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: 98 * date and approx. time of event: 2024 Oct 02, 02:06 - 2024 Oct 02, 02:26 * geocentric midpoint of event [JD]: 2460585.59483917 * magnitude of target star: 10.41 * magnitude drop [mag]: 7.07 * estimated maximum duration [s]: 1.350 * Moon: 0 % sunlit, 122° distance * Sun: 115° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 15 * 1 sigma uncertainty interval [path widths]: +/- 0.37 * 1 sigma uncertainty interval [seconds]: +/- 3.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.022, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.022", 0.003", 84°) * approx speed of asteroid's shadow [km/s]: 7.2057 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 345-196642 by 9037 1990 UJ2 on 2024 Oct 2 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 -165 0 0 41 34 18 2 7 3.2 1 119 26 41 29 43 41 38 53 41 26 22 41 42 15 .... -164 0 0 41 9 50 2 7 3.6 1 120 26 41 5 17 41 14 25 41 1 56 41 17 46 -0.66 -163 0 0 40 45 34 2 7 4.2 2 120 25 40 41 1 40 50 7 40 37 41 40 53 28 -0.84 -162 0 0 40 21 29 2 7 5.2 3 121 25 40 16 57 40 26 2 40 13 38 40 29 22 -0.92 -161 0 0 39 57 37 2 7 6.5 4 122 25 39 53 6 40 2 9 39 49 47 40 5 29 -0.97 -160 0 0 39 33 59 2 7 8.1 5 122 24 39 29 28 39 38 30 39 26 10 39 41 49 -1.00 -159 0 0 39 10 34 2 7 10.0 6 123 23 39 6 4 39 15 4 39 2 47 39 18 23 -1.03 -158 0 0 38 47 25 2 7 12.3 7 124 23 38 42 56 38 51 54 38 39 39 38 55 12 -1.04 -157 0 0 38 24 31 2 7 14.8 8 124 22 38 20 3 38 28 59 38 16 46 38 32 16 -1.06 -156 0 0 38 1 53 2 7 17.7 8 125 22 37 57 26 38 6 21 37 54 10 38 9 37 -1.07 -155 0 0 37 39 33 2 7 20.9 9 126 21 37 35 7 37 44 0 37 31 51 37 47 16 -1.07 -154 0 0 37 17 31 2 7 24.5 10 126 21 37 13 5 37 21 57 37 9 50 37 25 12 -1.08 -153 0 0 36 55 47 2 7 28.4 11 127 20 36 51 22 37 0 12 36 48 8 37 3 27 -1.09 -152 0 0 36 34 23 2 7 32.6 12 128 19 36 29 59 36 38 47 36 26 45 36 42 1 -1.09 -151 0 0 36 13 18 2 7 37.1 13 128 19 36 8 55 36 17 42 36 5 42 36 20 56 -1.10 -150 0 0 35 52 35 2 7 42.0 14 129 18 35 48 12 35 56 58 35 45 0 36 0 11 -1.10 -149 0 0 35 32 13 2 7 47.1 14 130 17 35 27 51 35 36 35 35 24 39 35 39 48 -1.11 -148 0 0 35 12 13 2 7 52.6 15 130 17 35 7 52 35 16 34 35 4 41 35 19 46 -1.11 -147 0 0 34 52 36 2 7 58.5 16 131 16 34 48 15 34 56 56 34 45 5 35 0 8 -1.11 -146 0 0 34 33 22 2 8 4.6 17 132 15 34 29 2 34 37 42 34 25 52 34 40 53 -1.12 -145 0 0 34 14 32 2 8 11.1 18 132 14 34 10 13 34 18 51 34 7 3 34 22 1 -1.12 -144 0 0 33 56 6 2 8 17.9 19 133 14 33 51 48 34 0 25 33 48 39 34 3 35 -1.12 -143 0 0 33 38 6 2 8 24.9 20 134 13 33 33 48 33 42 24 33 30 40 33 45 33 -1.13 -142 0 0 33 20 31 2 8 32.3 20 134 12 33 16 14 33 24 48 33 13 6 33 27 57 -1.13 -141 0 0 33 3 23 2 8 40.0 21 135 11 32 59 6 33 7 39 32 55 59 33 10 48 -1.13 -140 0 0 32 46 41 2 8 48.0 22 136 11 32 42 25 32 50 57 32 39 18 32 54 5 -1.13 -139 0 0 32 30 26 2 8 56.3 23 137 10 32 26 12 32 34 42 32 23 5 32 37 49 -1.14 -138 0 0 32 14 40 2 9 4.9 24 137 9 32 10 25 32 18 54 32 7 19 32 22 1 -1.14 -137 0 0 31 59 21 2 9 13.8 24 138 8 31 55 8 32 3 35 31 52 2 32 6 42 -1.14 -136 0 0 31 44 32 2 9 22.9 25 139 7 31 40 18 31 48 45 31 37 13 31 51 51 -1.14 -135 0 0 31 30 11 2 9 32.3 26 140 7 31 25 59 31 34 24 31 22 54 31 37 30 -1.14 -134 0 0 31 16 20 2 9 42.0 27 140 6 31 12 8 31 20 33 31 9 4 31 23 38 -1.15 -133 0 0 31 2 59 2 9 52.0 27 141 5 30 58 48 31 7 11 30 55 44 31 10 16 -1.15 -132 0 0 30 50 9 2 10 2.2 28 142 4 30 45 58 30 54 20 30 42 54 30 57 25 -1.15 -131 0 0 30 37 49 2 10 12.7 29 143 3 30 33 39 30 42 0 30 30 35 30 45 4 -1.15 -130 0 0 30 26 1 2 10 23.4 29 144 2 30 21 51 30 30 11 30 18 47 30 33 15 -1.15 -129 0 0 30 14 44 2 10 34.4 30 145 1 30 10 34 30 18 54 30 7 31 30 21 58 -1.16 -128 0 0 30 3 59 2 10 45.6 31 146 0 29 59 50 30 8 8 29 56 47 30 11 12 -1.16 -127 0 0 29 53 46 2 10 57.0 31 146 0 29 49 37 29 57 55 29 46 35 30 0 58 -1.16 -126 0 0 29 44 6 2 11 8.6 32 147 -1 29 39 57 29 48 14 29 36 55 29 51 17 -1.16 -125 0 0 29 34 58 2 11 20.5 33 148 -2 29 30 50 29 39 6 29 27 48 29 42 9 -1.16 -124 0 0 29 26 23 2 11 32.5 33 149 -3 29 22 16 29 30 32 29 19 14 29 33 34 -1.16 -123 0 0 29 18 22 2 11 44.8 34 150 -4 29 14 15 29 22 30 29 11 13 29 25 32 -1.16 -122 0 0 29 10 55 2 11 57.2 34 151 -5 29 6 47 29 15 2 29 3 46 29 18 4 -1.17 -121 0 0 29 4 1 2 12 9.8 35 152 -6 28 59 54 29 8 8 28 56 53 29 11 10 -1.17 -120 0 0 28 57 41 2 12 22.6 35 153 -7 28 53 34 29 1 48 28 50 33 29 4 49 -1.17 -119 0 0 28 51 55 2 12 35.6 36 155 -8 28 47 49 28 56 2 28 44 48 28 59 3 -1.17 -118 0 0 28 46 44 2 12 48.7 36 156 -9 28 42 38 28 50 51 28 39 37 28 53 52 -1.17 -117 0 0 28 42 7 2 13 2.0 37 157 -10 28 38 1 28 46 14 28 35 1 28 49 15 -1.17 -116 0 0 28 38 5 2 13 15.4 37 158 -11 28 33 59 28 42 12 28 30 59 28 45 12 -1.17 -115 0 0 28 34 38 2 13 28.9 38 159 -11 28 30 32 28 38 44 28 27 32 28 41 45 -1.17 -114 0 0 28 31 46 2 13 42.6 38 160 -12 28 27 40 28 35 52 28 24 40 28 38 53 -1.17 -113 0 0 28 29 28 2 13 56.3 38 161 -13 28 25 23 28 33 35 28 22 23 28 36 35 -1.18 -112 0 0 28 27 46 2 14 10.2 39 163 -14 28 23 41 28 31 52 28 20 41 28 34 53 -1.18 -111 0 0 28 26 40 2 14 24.2 39 164 -15 28 22 34 28 30 46 28 19 34 28 33 46 -1.18 -110 0 0 28 26 8 2 14 38.2 39 165 -16 28 22 2 28 30 14 28 19 2 28 33 15 -1.18 -109 0 0 28 26 12 2 14 52.4 39 166 -17 28 22 6 28 30 18 28 19 6 28 33 19 -1.18 -108 0 0 28 26 51 2 15 6.6 40 168 -18 28 22 45 28 30 57 28 19 45 28 33 58 -1.18 -107 0 0 28 28 5 2 15 20.9 40 169 -19 28 24 0 28 32 12 28 21 0 28 35 12 -1.18 -106 0 0 28 29 55 2 15 35.2 40 170 -20 28 25 50 28 34 2 28 22 49 28 37 3 -1.18 -105 0 0 28 32 21 2 15 49.5 40 171 -21 28 28 15 28 36 27 28 25 15 28 39 28 -1.18 -104 0 0 28 35 21 2 16 3.9 40 173 -22 28 31 15 28 39 28 28 28 15 28 42 29 -1.18 -103 0 0 28 38 57 2 16 18.3 40 174 -23 28 34 51 28 43 4 28 31 51 28 46 5 -1.18 -102 0 0 28 43 8 2 16 32.7 40 175 -23 28 39 2 28 47 15 28 36 1 28 50 17 -1.18 -101 0 0 28 47 55 2 16 47.1 40 177 -24 28 43 48 28 52 2 28 40 47 28 55 3 -1.18 -100 0 0 28 53 16 2 17 1.6 40 178 -25 28 49 9 28 57 24 28 46 8 29 0 25 -1.18 - 99 0 0 28 59 13 2 17 16.0 40 179 -26 28 55 5 29 3 20 28 52 4 29 6 22 -1.18 - 98 0 0 29 5 44 2 17 30.3 40 180 -27 29 1 36 29 9 51 28 58 35 29 12 54 -1.18 - 97 0 0 29 12 49 2 17 44.7 40 182 -28 29 8 41 29 16 57 29 5 40 29 20 0 -1.18 - 96 0 0 29 20 29 2 17 59.0 40 183 -29 29 16 21 29 24 38 29 13 19 29 27 41 -1.18 - 95 0 0 29 28 44 2 18 13.2 40 184 -30 29 24 35 29 32 53 29 21 33 29 35 56 -1.18 - 94 0 0 29 37 32 2 18 27.4 39 186 -31 29 33 23 29 41 42 29 30 21 29 44 45 -1.18 - 93 0 0 29 46 55 2 18 41.5 39 187 -31 29 42 45 29 51 5 29 39 43 29 54 8 -1.18 - 92 0 0 29 56 51 2 18 55.5 39 188 -32 29 52 41 30 1 1 29 49 38 30 4 5 -1.18 - 91 0 0 30 7 20 2 19 9.4 38 189 -33 30 3 10 30 11 31 30 0 7 30 14 35 -1.18 - 90 0 0 30 18 23 2 19 23.2 38 191 -34 30 14 12 30 22 34 30 11 8 30 25 38 -1.18 - 89 0 0 30 29 58 2 19 36.9 38 192 -35 30 25 47 30 34 10 30 22 43 30 37 14 -1.18 - 88 0 0 30 42 6 2 19 50.5 37 193 -36 30 37 54 30 46 18 30 34 50 30 49 23 -1.18 - 87 0 0 30 54 46 2 20 3.9 37 194 -36 30 50 34 30 58 59 30 47 29 31 2 4 -1.18 - 86 0 0 31 7 58 2 20 17.3 36 195 -37 31 3 45 31 12 11 31 0 40 31 15 17 -1.18 - 85 0 0 31 21 41 2 20 30.4 36 196 -38 31 17 28 31 25 55 31 14 22 31 29 1 -1.18 - 84 0 0 31 35 56 2 20 43.4 36 198 -39 31 31 42 31 40 10 31 28 36 31 43 17 -1.18 - 83 0 0 31 50 41 2 20 56.3 35 199 -39 31 46 26 31 54 56 31 43 20 31 58 3 -1.18 - 82 0 0 32 5 56 2 21 8.9 34 200 -40 32 1 41 32 10 12 31 58 34 32 13 19 -1.18 - 81 0 0 32 21 41 2 21 21.4 34 201 -41 32 17 25 32 25 57 32 14 18 32 29 6 -1.18 - 80 0 0 32 37 56 2 21 33.7 33 202 -41 32 33 39 32 42 12 32 30 31 32 45 21 -1.17 - 79 0 0 32 54 39 2 21 45.8 33 203 -42 32 50 22 32 58 56 32 47 13 33 2 6 -1.17 - 78 0 0 33 11 50 2 21 57.6 32 204 -43 33 7 33 33 16 9 33 4 24 33 19 18 -1.17 - 77 0 0 33 29 30 2 22 9.3 32 205 -43 33 25 11 33 33 49 33 22 2 33 36 59 -1.17 - 76 0 0 33 47 36 2 22 20.7 31 206 -44 33 43 17 33 51 56 33 40 7 33 55 7 -1.17 - 75 0 0 34 6 10 2 22 31.9 30 207 -44 34 1 50 34 10 30 33 58 39 34 13 41 -1.17 - 74 0 0 34 25 9 2 22 42.9 30 208 -45 34 20 48 34 29 30 34 17 37 34 32 42 -1.17 - 73 0 0 34 44 34 2 22 53.6 29 209 -45 34 40 12 34 48 55 34 37 1 34 52 8 -1.17 - 72 0 0 35 4 23 2 23 4.1 28 210 -46 35 0 1 35 8 46 34 56 49 35 11 59 -1.17 - 71 0 0 35 24 37 2 23 14.3 27 210 -46 35 20 14 35 29 0 35 17 1 35 32 14 -1.17 - 70 0 0 35 45 14 2 23 24.2 27 211 -47 35 40 50 35 49 38 35 37 37 35 52 52 -1.17 - 69 0 0 36 6 14 2 23 33.9 26 212 -47 36 1 49 36 10 39 35 58 35 36 13 53 -1.17 - 68 0 0 36 27 36 2 23 43.3 25 213 -48 36 23 10 36 32 1 36 19 56 36 35 17 -1.17 - 67 0 0 36 49 19 2 23 52.4 24 214 -48 36 44 53 36 53 46 36 41 38 36 57 2 -1.17 - 66 0 0 37 11 23 2 24 1.2 24 215 -48 37 6 56 37 15 51 37 3 40 37 19 7 -1.17 - 65 0 0 37 33 47 2 24 9.7 23 216 -49 37 29 19 37 38 15 37 26 3 37 41 32 -1.17 - 64 0 0 37 56 30 2 24 18.0 22 216 -49 37 52 1 38 0 59 37 48 45 38 4 17 -1.17 - 63 0 0 38 19 31 2 24 25.9 21 217 -49 38 15 2 38 24 1 38 11 44 38 27 20 -1.17 - 62 0 0 38 42 50 2 24 33.5 21 218 -49 38 38 20 38 47 21 38 35 2 38 50 40 -1.17 - 61 0 0 39 6 26 2 24 40.9 20 219 -49 39 1 55 39 10 57 38 58 36 39 14 17 -1.17 - 60 0 0 39 30 17 2 24 47.9 19 220 -49 39 25 45 39 34 50 39 22 26 39 38 10 -1.17 - 59 0 0 39 54 24 2 24 54.6 18 220 -50 39 49 51 39 58 57 39 46 31 40 2 18 -1.17 - 58 0 0 40 18 44 2 25 1.0 17 221 -50 40 14 11 40 23 19 40 10 50 40 26 40 -1.17 - 57 0 0 40 43 18 2 25 7.1 16 222 -50 40 38 44 40 47 53 40 35 23 40 51 15 -1.17 - 56 0 0 41 8 5 2 25 12.8 16 223 -50 41 3 29 41 12 40 41 0 8 41 16 3 -1.17 - 55 0 0 41 33 3 2 25 18.3 15 223 -50 41 28 27 41 37 39 41 25 4 41 41 2 -1.17 - 54 0 0 41 58 11 2 25 23.4 14 224 -50 41 53 34 42 2 49 41 50 11 42 6 12 -1.17 - 53 0 0 42 23 30 2 25 28.3 13 225 -49 42 18 52 42 28 8 42 15 28 42 31 32 -1.17 - 52 0 0 42 48 57 2 25 32.8 12 226 -49 42 44 18 42 53 36 42 40 54 42 57 1 -1.17 - 51 0 0 43 14 32 2 25 37.0 11 226 -49 43 9 52 43 19 11 43 6 28 43 22 37 -1.17 - 50 0 0 43 40 14 2 25 40.9 11 227 -49 43 35 34 43 44 54 43 32 9 43 48 21 -1.17 - 49 0 0 44 6 2 2 25 44.4 10 228 -49 44 1 22 44 10 44 43 57 56 44 14 10 -1.17 - 48 0 0 44 31 56 2 25 47.7 9 229 -49 44 27 15 44 36 38 44 23 48 44 40 5 -1.17 - 47 0 0 44 57 54 2 25 50.6 8 229 -48 44 53 12 45 2 37 44 49 45 45 6 5 -1.18 - 46 0 0 45 23 55 2 25 53.3 7 230 -48 45 19 13 45 28 39 45 15 45 45 32 7 -1.18 - 45 0 0 45 49 59 2 25 55.7 6 231 -48 45 45 16 45 54 44 45 41 48 45 58 12 -1.18 - 44 0 0 46 16 5 2 25 57.7 6 232 -47 46 11 21 46 20 50 46 7 53 46 24 19 -1.19 - 43 0 0 46 42 12 2 25 59.5 5 232 -47 46 37 27 46 46 57 46 33 58 46 50 27 -1.19 - 42 0 0 47 8 18 2 26 1.0 4 233 -47 47 3 32 47 13 4 47 0 3 47 16 34 -1.20 - 41 0 0 47 34 23 2 26 2.2 3 234 -46 47 29 37 47 39 10 47 26 7 47 42 40 -1.22 - 40 0 0 48 0 27 2 26 3.1 2 234 -46 47 55 40 48 5 14 47 52 10 48 8 45 -1.24 - 39 0 0 48 26 27 2 26 3.7 2 235 -45 48 21 40 48 31 15 48 18 10 48 34 47 -1.28 - 38 0 0 48 52 24 2 26 4.1 1 236 -45 48 47 37 48 57 13 48 44 6 49 0 45 -1.39 - 37 0 0 49 18 17 2 26 4.2 0 237 -44 49 13 29 49 23 6 49 9 58 .. .. .. -4.20 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 345-196642 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 27 45.0752 DE: -21 06 12.539 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 27 45.0751 DE: -21 06 12.540 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.300) * V mag [mag]: 10.4 * B mag [mag]: 10.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (9037) 1990 UJ2 asteroid class: approx. diameter [km]: 10 approx. diameter ["]: 0.009 distance from Earth [AU]: 1.49620 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#42 date of fit: 2023 Apr 25 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): 0.022", 0.003", 83.523° remarks: * orbital elements for (9037)1990 UJ2 : Mean anomaly = 342.1171796514 deg Arg. of pericenter = 224.5039012999 deg Long. of node = 132.9549237387 deg Inclination = 4.7973793847 deg Eccentricity = 0.2158474936 Semimajor axis = 2.6517319572 AU Perihelion dist = 2.0793622606 AU Mag: H = 13.82, G = 0.15 Epoch of elements : MJD 60585.09483888 TDT (2024 Oct 02.0948) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#422023Apr25,1.35,2024,10,2,2.276140,-0.057606,0.760119,4.055480,0.307412,0.004738,0.001257,0.000001,0.000000 -98.1410,-21.0222,143.19,-3.72,False UCAC4 345-196642,20.46252090,-21.1034831,10.80,10.41,10.20,0.0,0,,20.48664342,-21.0222464,7.07,6.83,0,0,0 9037,1990 UJ2,17.48,9.753,1.4962,0,0,1.703,1.81,,1.0,0 0,342.0955,2024,10,2,224.5039,132.9549,4.7974,0.21585,2.65173,2.07936,13.81,5.0,0.15 1.367,0.0223,0.0032,84,0.0033,Known errors,2.21,0,-1,-1 20241002_196642,60140.60 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:29 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org