IOTA/IOTA-ES occultation update for (1385) Gelria / UCAC4 459-050365 event on 2024 Dec 21, 02:44 UT Visible from Summary ------- On 2024 Dec 21 UT, the 20.467 km diameter asteroid (1385) Gelria will occult a 11.7 mag star in the constellation Virgo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.91 mag to 16.64 mag (the magnitude of the asteroid) for at most 1.000 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: 2024 Dec 21, 02:39 - 2024 Dec 21, 02:48 * geocentric midpoint of event [JD]: 2460665.61403550 * magnitude of target star: 11.74 * magnitude drop [mag]: 4.91 * estimated maximum duration [s]: 1.000 * Moon: 67 % sunlit, 29° distance * Sun: 80° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 25 * 1 sigma uncertainty interval [path widths]: +/- 0.22 * 1 sigma uncertainty interval [seconds]: +/- 1.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.009", 0.002", 111°) * approx speed of asteroid's shadow [km/s]: 20.4621 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 459-050365 by 1385 Gelria on 2024 Dec 21 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 - 31 0 0 49 4 59 2 40 0.3 0 88 -63 48 58 10 49 11 50 48 55 8 49 14 52 .... - 30 0 0 49 6 28 2 40 0.3 1 88 -63 48 59 39 49 13 18 48 56 37 49 16 20 -0.40 - 29 0 0 49 7 46 2 40 0.4 1 89 -63 49 0 56 49 14 36 48 57 55 49 17 38 -0.55 - 28 0 0 49 8 51 2 40 0.5 2 90 -62 49 2 2 49 15 41 48 59 1 49 18 43 -0.61 - 27 0 0 49 9 46 2 40 0.7 3 91 -62 49 2 56 49 16 36 48 59 55 49 19 37 -0.64 - 26 0 0 49 10 28 2 40 1.0 3 92 -62 49 3 39 49 17 18 49 0 38 49 20 20 -0.65 - 25 0 0 49 10 59 2 40 1.2 4 92 -61 49 4 10 49 17 49 49 1 9 49 20 51 -0.66 - 24 0 0 49 11 18 2 40 1.6 5 93 -61 49 4 29 49 18 8 49 1 28 49 21 10 -0.67 - 23 0 0 49 11 26 2 40 1.9 5 94 -61 49 4 37 49 18 16 49 1 36 49 21 18 -0.68 - 22 0 0 49 11 22 2 40 2.4 6 95 -60 49 4 33 49 18 12 49 1 32 49 21 14 -0.68 - 21 0 0 49 11 6 2 40 2.9 7 95 -60 49 4 17 49 17 56 49 1 16 49 20 58 -0.69 - 20 0 0 49 10 39 2 40 3.4 7 96 -60 49 3 50 49 17 29 49 0 49 49 20 31 -0.69 - 19 0 0 49 10 0 2 40 4.0 8 97 -59 49 3 11 49 16 50 49 0 10 49 19 52 -0.69 - 18 0 0 49 9 10 2 40 4.6 9 98 -59 49 2 20 49 15 59 48 59 19 49 19 1 -0.69 - 17 0 0 49 8 7 2 40 5.3 9 98 -58 49 1 18 49 14 57 48 58 17 49 17 59 -0.69 - 16 0 0 49 6 53 2 40 6.0 10 99 -58 49 0 4 49 13 43 48 57 3 49 16 45 -0.70 - 15 0 0 49 5 27 2 40 6.8 11 100 -57 48 58 38 49 12 17 48 55 37 49 15 19 -0.70 - 14 0 0 49 3 50 2 40 7.6 11 101 -57 48 57 1 49 10 40 48 53 59 49 13 42 -0.70 - 13 0 0 49 2 1 2 40 8.5 12 101 -56 48 55 11 49 8 51 48 52 10 49 11 53 -0.70 - 12 0 0 49 0 0 2 40 9.4 12 102 -56 48 53 10 49 6 50 48 50 9 49 9 52 -0.70 - 11 0 0 48 57 48 2 40 10.4 13 103 -55 48 50 58 49 4 38 48 47 56 49 7 40 -0.70 - 10 0 0 48 55 23 2 40 11.5 14 104 -55 48 48 34 49 2 14 48 45 32 49 5 16 -0.70 - 9 0 0 48 52 47 2 40 12.5 14 105 -54 48 45 57 48 59 38 48 42 56 49 2 40 -0.70 - 8 0 0 48 50 0 2 40 13.7 15 105 -54 48 43 10 48 56 50 48 40 8 48 59 53 -0.70 - 7 0 0 48 47 0 2 40 14.9 16 106 -53 48 40 10 48 53 51 48 37 9 48 56 54 -0.70 - 6 0 0 48 43 49 2 40 16.1 16 107 -53 48 36 59 48 50 40 48 33 57 48 53 43 -0.70 - 5 0 0 48 40 27 2 40 17.4 17 108 -52 48 33 36 48 47 18 48 30 34 48 50 20 -0.71 - 4 0 0 48 36 52 2 40 18.7 18 109 -52 48 30 2 48 43 43 48 27 0 48 46 46 -0.71 - 3 0 0 48 33 6 2 40 20.1 18 109 -51 48 26 15 48 39 57 48 23 13 48 43 0 -0.71 - 2 0 0 48 29 8 2 40 21.6 19 110 -51 48 22 17 48 36 0 48 19 15 48 39 2 -0.71 - 1 0 0 48 24 59 2 40 23.0 20 111 -50 48 18 7 48 31 50 48 15 5 48 34 53 -0.71 0 0 0 48 20 37 2 40 24.6 20 112 -49 48 13 46 48 27 29 48 10 44 48 30 32 -0.71 1 0 0 48 16 5 2 40 26.2 21 113 -49 48 9 13 48 22 57 48 6 11 48 26 0 -0.71 2 0 0 48 11 20 2 40 27.8 22 113 -48 48 4 28 48 18 12 48 1 26 48 21 15 -0.71 3 0 0 48 6 24 2 40 29.5 22 114 -48 47 59 32 48 13 16 47 56 29 48 16 20 -0.71 4 0 0 48 1 16 2 40 31.3 23 115 -47 47 54 24 48 8 9 47 51 21 48 11 12 -0.71 5 0 0 47 55 56 2 40 33.1 24 116 -46 47 49 4 48 2 50 47 46 1 48 5 53 -0.71 6 0 0 47 50 25 2 40 34.9 24 117 -46 47 43 33 47 57 19 47 40 30 48 0 22 -0.71 7 0 0 47 44 43 2 40 36.8 25 118 -45 47 37 50 47 51 36 47 34 47 47 54 40 -0.71 8 0 0 47 38 48 2 40 38.8 25 118 -45 47 31 55 47 45 42 47 28 52 47 48 46 -0.71 9 0 0 47 32 43 2 40 40.8 26 119 -44 47 25 49 47 39 37 47 22 46 47 42 41 -0.71 10 0 0 47 26 25 2 40 42.9 27 120 -43 47 19 32 47 33 20 47 16 28 47 36 24 -0.71 11 0 0 47 19 57 2 40 45.0 27 121 -43 47 13 2 47 26 51 47 9 59 47 29 55 -0.71 12 0 0 47 13 16 2 40 47.2 28 122 -42 47 6 22 47 20 11 47 3 18 47 23 15 -0.71 13 0 0 47 6 25 2 40 49.4 29 123 -41 46 59 30 47 13 20 46 56 26 47 16 24 -0.71 14 0 0 46 59 22 2 40 51.7 29 124 -41 46 52 27 47 6 17 46 49 23 47 9 22 -0.71 15 0 0 46 52 7 2 40 54.0 30 125 -40 46 45 12 46 59 3 46 42 8 47 2 8 -0.71 16 0 0 46 44 41 2 40 56.4 31 125 -39 46 37 46 46 51 38 46 34 42 46 54 42 -0.71 17 0 0 46 37 5 2 40 58.8 31 126 -39 46 30 9 46 44 1 46 27 4 46 47 6 -0.71 18 0 0 46 29 16 2 41 1.3 32 127 -38 46 22 20 46 36 13 46 19 16 46 39 18 -0.71 19 0 0 46 21 17 2 41 3.8 33 128 -37 46 14 20 46 28 14 46 11 16 46 31 19 -0.71 20 0 0 46 13 6 2 41 6.4 33 129 -37 46 6 10 46 20 4 46 3 5 46 23 9 -0.71 21 0 0 46 4 45 2 41 9.1 34 130 -36 45 57 48 46 11 42 45 54 43 46 14 48 -0.71 22 0 0 45 56 12 2 41 11.8 34 131 -35 45 49 15 46 3 10 45 46 10 46 6 16 -0.71 23 0 0 45 47 29 2 41 14.5 35 132 -35 45 40 31 45 54 27 45 37 26 45 57 33 -0.71 24 0 0 45 38 34 2 41 17.3 36 133 -34 45 31 36 45 45 33 45 28 31 45 48 39 -0.71 25 0 0 45 29 29 2 41 20.2 36 134 -33 45 22 31 45 36 28 45 19 25 45 39 34 -0.71 26 0 0 45 20 13 2 41 23.1 37 135 -32 45 13 14 45 27 12 45 10 9 45 30 19 -0.71 27 0 0 45 10 47 2 41 26.1 37 136 -32 45 3 48 45 17 46 45 0 42 45 20 53 -0.71 28 0 0 45 1 9 2 41 29.1 38 137 -31 44 54 10 45 8 9 44 51 4 45 11 16 -0.71 29 0 0 44 51 22 2 41 32.2 39 138 -30 44 44 22 44 58 22 44 41 16 45 1 29 -0.71 30 0 0 44 41 24 2 41 35.3 39 139 -30 44 34 24 44 48 24 44 31 18 44 51 31 -0.71 31 0 0 44 31 15 2 41 38.5 40 140 -29 44 24 15 44 38 16 44 21 9 44 41 23 -0.71 32 0 0 44 20 57 2 41 41.7 40 141 -28 44 13 56 44 27 58 44 10 50 44 31 5 -0.71 33 0 0 44 10 29 2 41 45.0 41 143 -27 44 3 28 44 17 30 44 0 21 44 20 37 -0.71 34 0 0 43 59 50 2 41 48.3 42 144 -27 43 52 49 44 6 52 43 49 42 44 9 59 -0.71 35 0 0 43 49 2 2 41 51.7 42 145 -26 43 42 0 43 56 4 43 38 53 43 59 11 -0.71 36 0 0 43 38 4 2 41 55.1 43 146 -25 43 31 2 43 45 6 43 27 55 43 48 14 -0.72 37 0 0 43 26 56 2 41 58.6 43 147 -24 43 19 54 43 33 59 43 16 47 43 37 7 -0.72 38 0 0 43 15 39 2 42 2.1 44 148 -24 43 8 37 43 22 42 43 5 29 43 25 50 -0.72 39 0 0 43 4 13 2 42 5.7 44 150 -23 42 57 10 43 11 16 42 54 3 43 14 24 -0.72 40 0 0 42 52 37 2 42 9.3 45 151 -22 42 45 34 42 59 41 42 42 27 43 2 49 -0.72 41 0 0 42 40 53 2 42 13.0 45 152 -21 42 33 49 42 47 57 42 30 42 42 51 5 -0.72 42 0 0 42 28 59 2 42 16.7 46 153 -20 42 21 56 42 36 4 42 18 48 42 39 12 -0.72 43 0 0 42 16 57 2 42 20.5 47 155 -20 42 9 53 42 24 2 42 6 46 42 27 10 -0.72 44 0 0 42 4 47 2 42 24.3 47 156 -19 41 57 43 42 11 52 41 54 35 42 15 0 -0.72 45 0 0 41 52 28 2 42 28.2 48 157 -18 41 45 24 41 59 33 41 42 16 42 2 42 -0.72 46 0 0 41 40 1 2 42 32.1 48 159 -17 41 32 57 41 47 7 41 29 48 41 50 15 -0.72 47 0 0 41 27 26 2 42 36.1 48 160 -17 41 20 21 41 34 32 41 17 13 41 37 41 -0.72 48 0 0 41 14 44 2 42 40.1 49 161 -16 41 7 39 41 21 50 41 4 30 41 24 59 -0.72 49 0 0 41 1 54 2 42 44.1 49 163 -15 40 54 49 41 9 0 40 51 40 41 12 9 -0.72 50 0 0 40 48 57 2 42 48.2 50 164 -14 40 41 51 40 56 3 40 38 43 40 59 12 -0.72 51 0 0 40 35 52 2 42 52.3 50 166 -13 40 28 46 40 42 59 40 25 38 40 46 8 -0.72 52 0 0 40 22 41 2 42 56.5 51 167 -13 40 15 35 40 29 47 40 12 26 40 32 57 -0.72 53 0 0 40 9 22 2 43 0.7 51 169 -12 40 2 16 40 16 29 39 59 7 40 19 39 -0.72 54 0 0 39 55 58 2 43 4.9 51 170 -11 39 48 51 40 3 5 39 45 42 40 6 14 -0.72 55 0 0 39 42 27 2 43 9.2 52 172 -10 39 35 20 39 49 34 39 32 11 39 52 44 -0.72 56 0 0 39 28 50 2 43 13.5 52 174 -9 39 21 43 39 35 58 39 18 34 39 39 7 -0.72 57 0 0 39 15 8 2 43 17.8 52 175 -8 39 8 1 39 22 15 39 4 52 39 25 25 -0.72 58 0 0 39 1 20 2 43 22.2 53 177 -8 38 54 13 39 8 28 38 51 4 39 11 38 -0.72 59 0 0 38 47 27 2 43 26.6 53 179 -7 38 40 20 38 54 35 38 37 11 38 57 45 -0.72 60 0 0 38 33 29 2 43 31.1 53 180 -6 38 26 22 38 40 37 38 23 13 38 43 47 -0.72 61 0 0 38 19 27 2 43 35.6 53 182 -5 38 12 19 38 26 35 38 9 10 38 29 45 -0.72 62 0 0 38 5 20 2 43 40.1 53 184 -4 37 58 12 38 12 28 37 55 3 38 15 38 -0.72 63 0 0 37 51 9 2 43 44.6 54 186 -4 37 44 1 37 58 17 37 40 52 38 1 27 -0.72 64 0 0 37 36 54 2 43 49.1 54 187 -3 37 29 46 37 44 2 37 26 37 37 47 13 -0.72 65 0 0 37 22 36 2 43 53.7 54 189 -2 37 15 28 37 29 44 37 12 19 37 32 54 -0.72 66 0 0 37 8 15 2 43 58.3 54 191 -1 37 1 7 37 15 23 36 57 57 37 18 33 -0.72 67 0 0 36 53 50 2 44 2.9 54 193 0 36 46 43 37 0 59 36 43 33 37 4 9 -0.72 68 0 0 36 39 24 2 44 7.5 54 194 1 36 32 16 36 46 32 36 29 6 36 49 42 -0.72 69 0 0 36 24 55 2 44 12.2 54 196 1 36 17 47 36 32 3 36 14 37 36 35 13 -0.72 70 0 0 36 10 23 2 44 16.9 54 198 2 36 3 15 36 17 32 36 0 6 36 20 42 -0.72 71 0 0 35 55 51 2 44 21.5 54 200 3 35 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38 32 57 10 -0.73 85 0 0 32 32 34 2 45 27.3 51 223 15 32 25 27 32 39 41 32 22 19 32 42 50 -0.73 86 0 0 32 18 18 2 45 31.9 50 225 15 32 11 11 32 25 24 32 8 3 32 28 34 -0.73 87 0 0 32 4 5 2 45 36.5 50 226 16 31 56 59 32 11 12 31 53 51 32 14 21 -0.73 88 0 0 31 49 57 2 45 41.1 49 228 17 31 42 51 31 57 4 31 39 43 32 0 13 -0.73 89 0 0 31 35 54 2 45 45.6 49 229 18 31 28 48 31 43 0 31 25 40 31 46 9 -0.73 90 0 0 31 21 55 2 45 50.2 48 230 19 31 14 50 31 29 1 31 11 41 31 32 10 -0.73 91 0 0 31 8 1 2 45 54.7 48 232 19 31 0 56 31 15 7 30 57 48 31 18 16 -0.73 92 0 0 30 54 13 2 45 59.2 47 233 20 30 47 8 31 1 19 30 44 0 31 4 28 -0.73 93 0 0 30 40 31 2 46 3.6 47 234 21 30 33 27 30 47 37 30 30 19 30 50 45 -0.73 94 0 0 30 26 55 2 46 8.0 46 236 22 30 19 51 30 34 0 30 16 43 30 37 9 -0.73 95 0 0 30 13 26 2 46 12.4 46 237 22 30 6 22 30 20 31 30 3 14 30 23 39 -0.73 96 0 0 30 0 4 2 46 16.7 45 238 23 29 53 0 30 7 8 29 49 52 30 10 16 -0.73 97 0 0 29 46 48 2 46 21.0 44 239 24 29 39 45 29 53 52 29 36 37 29 57 1 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25 10 9 -0.74 124 0 0 24 51 52 2 47 54.2 23 261 40 24 44 56 24 58 48 24 41 52 25 1 52 -0.74 125 0 0 24 43 50 2 47 56.6 22 261 40 24 36 55 24 50 46 24 33 51 24 53 50 -0.74 126 0 0 24 36 2 2 47 58.9 21 262 41 24 29 7 24 42 58 24 26 4 24 46 2 -0.74 127 0 0 24 28 29 2 48 1.1 20 262 41 24 21 35 24 35 25 24 18 31 24 38 29 -0.74 128 0 0 24 21 11 2 48 3.2 19 263 41 24 14 16 24 28 6 24 11 13 24 31 10 -0.74 129 0 0 24 14 7 2 48 5.2 19 263 42 24 7 13 24 21 2 24 4 10 24 24 6 -0.74 130 0 0 24 7 19 2 48 7.1 18 264 42 24 0 25 24 14 13 23 57 21 24 17 17 -0.74 131 0 0 24 0 45 2 48 9.0 17 264 42 23 53 51 24 7 39 23 50 48 24 10 43 -0.75 132 0 0 23 54 27 2 48 10.7 16 265 42 23 47 33 24 1 21 23 44 30 24 4 24 -0.75 133 0 0 23 48 23 2 48 12.4 15 265 43 23 41 30 23 55 17 23 38 27 23 58 21 -0.75 134 0 0 23 42 36 2 48 13.9 14 265 43 23 35 43 23 49 29 23 32 40 23 52 33 -0.75 135 0 0 23 37 4 2 48 15.4 13 266 43 23 30 11 23 43 57 23 27 8 23 47 0 -0.75 136 0 0 23 31 47 2 48 16.7 12 266 43 23 24 55 23 38 40 23 21 52 23 41 44 -0.75 137 0 0 23 26 46 2 48 18.0 11 267 43 23 19 54 23 33 39 23 16 51 23 36 42 -0.76 138 0 0 23 22 1 2 48 19.2 10 267 43 23 15 9 23 28 54 23 12 6 23 31 57 -0.76 139 0 0 23 17 32 2 48 20.2 9 268 43 23 10 40 23 24 25 23 7 37 23 27 28 -0.76 140 0 0 23 13 19 2 48 21.2 8 268 43 23 6 27 23 20 11 23 3 24 23 23 14 -0.76 141 0 0 23 9 22 2 48 22.1 8 268 43 23 2 30 23 16 14 22 59 28 23 19 17 -0.77 142 0 0 23 5 40 2 48 22.8 7 269 43 22 58 49 23 12 33 22 55 47 23 15 35 -0.78 143 0 0 23 2 16 2 48 23.5 6 269 43 22 55 24 23 9 8 22 52 22 23 12 10 -0.78 144 0 0 22 59 7 2 48 24.1 5 270 43 22 52 16 23 5 59 22 49 14 23 9 2 -0.80 145 0 0 22 56 15 2 48 24.5 4 270 43 22 49 23 23 3 6 22 46 21 23 6 9 -0.81 146 0 0 22 53 38 2 48 24.9 3 270 43 22 46 47 23 0 30 22 43 45 23 3 32 -0.84 147 0 0 22 51 18 2 48 25.2 2 271 43 22 44 27 22 58 9 22 41 25 23 1 12 -0.90 148 0 0 22 49 14 2 48 25.3 1 271 43 22 42 24 22 56 6 22 39 22 22 59 8 -1.04 149 0 0 22 47 27 2 48 25.4 0 272 43 22 40 36 22 54 18 22 37 34 22 57 21 -2.56 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 459-050365 * constellation : Virgo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 12 42 08.0412 DE: +01 39 07.381 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 12 42 08.0412 DE: +01 39 07.381 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.7 * B mag [mag]: 12.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1385) Gelria asteroid class: approx. diameter [km]: 20 approx. diameter ["]: 0.009 distance from Earth [AU]: 3.00660 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#55 date of fit: 2023 Apr 27 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", 0.002", 110.981° remarks: * orbital elements for (1385)Gelria : Mean anomaly = 150.4605437581 deg Arg. of pericenter = 259.5459232465 deg Long. of node = 114.8470058570 deg Inclination = 6.9205342479 deg Eccentricity = 0.1077843049 Semimajor axis = 2.7397406455 AU Perihelion dist = 2.4444396045 AU Mag: H = 10.90, G = 0.15 Epoch of elements : MJD 60665.11403567 TDT (2024 Dec 21.1140) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#552023Apr27,1.00,2024,12,21,2.736852,0.132638,0.568784,11.248850,-2.617642,-0.005392,0.002412,0.000000,0.000000 59.6291,1.5149,138.48,-23.44,False UCAC4 459-050365,12.70223363,1.6520505,12.22,11.74,11.48,0.0,0,,12.72343958,1.5149014,4.91,4.72,0,0,0 1385,Gelria,16.64,20.467,3.0066,0,0,2.195,-7.66,,1.6,0 0,150.4358,2024,12,21,259.5459,114.8470,6.9205,0.10778,2.73974,2.44444,10.90,5.0,0.15 1.222,0.0093,0.0017,111,0.0021,Known errors,1.36,0,-1,-1 20241221_050365,60140.75 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:57 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org