IOTA/IOTA-ES occultation update for (21900) Orus / UCAC4 541-037650 event on 2023 Dec 27, 06:38 UT Visible from Canada Summary ------- On 2023 Dec 27 UT, the 49.8 km diameter asteroid (21900) Orus will occult a 13.5 mag star in the constellation Gemini for observers along a path across Canada. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.42 mag to 16.82 mag (the magnitude of the asteroid) for at most 3.040 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: 97 * date and approx. time of event: 2023 Dec 27, 06:32 - 2023 Dec 27, 06:43 * geocentric midpoint of event [JD]: 2460305.77652433 * magnitude of target star: 13.45 * magnitude drop [mag]: 3.42 * estimated maximum duration [s]: 3.040 * Moon: 100 % sunlit, 13° distance * Sun: 168° distance * rough path description: Canada The occultation path -------------------- * approximate projected width [km]: 61 * 1 sigma uncertainty interval [path widths]: +/- 0.38 * 1 sigma uncertainty interval [seconds]: +/- 4.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.024, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.025", 0.002", 104°) * approx speed of asteroid's shadow [km/s]: 16.4118 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 541-037650 by 21900 Orus on 2023 Dec 27 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 169 0 0 33 11 3 6 43 26.2 1 69 -12 33 28 56 32 53 15 33 42 31 32 39 49 .... 170 0 0 33 31 11 6 43 26.1 2 69 -13 33 49 4 33 13 22 34 2 40 32 59 55 -0.61 171 0 0 33 51 19 6 43 25.8 2 70 -14 34 9 13 33 33 30 34 22 50 33 20 2 -0.65 172 0 0 34 11 28 6 43 25.4 3 70 -15 34 29 23 33 53 38 34 42 59 33 40 10 -0.66 173 0 0 34 31 37 6 43 24.9 4 71 -16 34 49 32 34 13 46 35 3 9 34 0 18 -0.67 174 0 0 34 51 44 6 43 24.3 5 72 -17 35 9 40 34 33 53 35 23 18 34 20 25 -0.68 175 0 0 35 11 51 6 43 23.6 6 72 -18 35 29 47 34 53 59 35 43 25 34 40 31 -0.69 176 0 0 35 31 56 6 43 22.8 7 73 -18 35 49 53 35 14 4 36 3 31 35 0 35 -0.69 177 0 0 35 51 59 6 43 21.8 8 73 -19 36 9 56 35 34 7 36 23 34 35 20 37 -0.69 178 0 0 36 12 0 6 43 20.8 9 74 -20 36 29 57 35 54 7 36 43 35 35 40 37 -0.69 179 0 0 36 31 57 6 43 19.6 9 75 -21 36 49 54 36 14 4 37 3 33 36 0 34 -0.70 -180 0 0 36 51 51 6 43 18.4 10 75 -22 37 9 48 36 33 57 37 23 27 36 20 28 -0.70 -179 0 0 37 11 41 6 43 17.0 11 76 -23 37 29 38 36 53 47 37 43 17 36 40 17 -0.70 -178 0 0 37 31 26 6 43 15.6 12 76 -24 37 49 24 37 13 33 38 3 3 37 0 3 -0.70 -177 0 0 37 51 7 6 43 14.0 13 77 -24 38 9 4 37 33 13 38 22 44 37 19 43 -0.70 -176 0 0 38 10 42 6 43 12.4 14 78 -25 38 28 40 37 52 49 38 42 19 37 39 19 -0.70 -175 0 0 38 30 12 6 43 10.7 15 78 -26 38 48 9 38 12 18 39 1 49 37 58 48 -0.70 -174 0 0 38 49 35 6 43 8.8 15 79 -27 39 7 33 38 31 42 39 21 12 38 18 12 -0.70 -173 0 0 39 8 53 6 43 6.9 16 80 -28 39 26 50 38 50 59 39 40 29 38 37 30 -0.70 -172 0 0 39 28 3 6 43 4.9 17 80 -28 39 46 0 39 10 10 39 59 39 38 56 40 -0.71 -171 0 0 39 47 6 6 43 2.9 18 81 -29 40 5 3 39 29 13 40 18 41 39 15 44 -0.71 -170 0 0 40 6 1 6 43 0.7 19 82 -30 40 23 58 39 48 9 40 37 36 39 34 40 -0.71 -169 0 0 40 24 49 6 42 58.5 19 82 -31 40 42 45 40 6 57 40 56 23 39 53 28 -0.71 -168 0 0 40 43 28 6 42 56.1 20 83 -32 41 1 24 40 25 37 41 15 2 40 12 8 -0.71 -167 0 0 41 1 59 6 42 53.7 21 84 -32 41 19 54 40 44 8 41 33 31 40 30 39 -0.71 -166 0 0 41 20 20 6 42 51.3 22 85 -33 41 38 15 41 2 30 41 51 52 40 49 2 -0.71 -165 0 0 41 38 32 6 42 48.7 22 85 -34 41 56 27 41 20 42 42 10 3 41 7 15 -0.71 -164 0 0 41 56 35 6 42 46.1 23 86 -35 42 14 29 41 38 46 42 28 5 41 25 19 -0.71 -163 0 0 42 14 28 6 42 43.5 24 87 -35 42 32 21 41 56 39 42 45 56 41 43 13 -0.71 -162 0 0 42 32 10 6 42 40.7 25 88 -36 42 50 3 42 14 22 43 3 38 42 0 56 -0.71 -161 0 0 42 49 42 6 42 38.0 25 88 -37 43 7 34 42 31 55 43 21 8 42 18 30 -0.71 -160 0 0 43 7 4 6 42 35.1 26 89 -38 43 24 55 42 49 17 43 38 28 42 35 52 -0.71 -159 0 0 43 24 14 6 42 32.2 27 90 -38 43 42 4 43 6 29 43 55 37 42 53 4 -0.71 -158 0 0 43 41 13 6 42 29.2 28 91 -39 43 59 3 43 23 29 44 12 35 43 10 5 -0.71 -157 0 0 43 58 1 6 42 26.2 28 92 -40 44 15 49 43 40 17 44 29 21 43 26 54 -0.71 -156 0 0 44 14 37 6 42 23.1 29 93 -40 44 32 25 43 56 54 44 45 56 43 43 32 -0.71 -155 0 0 44 31 2 6 42 20.0 30 93 -41 44 48 48 44 13 19 45 2 18 43 59 58 -0.71 -154 0 0 44 47 14 6 42 16.8 30 94 -42 45 4 59 44 29 33 45 18 29 44 16 12 -0.71 -153 0 0 45 3 14 6 42 13.6 31 95 -42 45 20 58 44 45 34 45 34 27 44 32 13 -0.71 -152 0 0 45 19 1 6 42 10.4 32 96 -43 45 36 44 45 1 22 45 50 12 44 48 3 -0.71 -151 0 0 45 34 36 6 42 7.1 32 97 -44 45 52 18 45 16 58 46 5 45 45 3 39 -0.71 -150 0 0 45 49 58 6 42 3.7 33 98 -44 46 7 39 45 32 21 46 21 5 45 19 4 -0.71 -149 0 0 46 5 7 6 42 0.4 34 99 -45 46 22 47 45 47 31 46 36 12 45 34 15 -0.71 -148 0 0 46 20 3 6 41 56.9 34 100 -45 46 37 42 46 2 29 46 51 6 45 49 13 -0.72 -147 0 0 46 34 46 6 41 53.5 35 101 -46 46 52 24 46 17 13 47 5 47 46 3 58 -0.72 -146 0 0 46 49 16 6 41 50.0 36 102 -47 47 6 52 46 31 43 47 20 15 46 18 29 -0.72 -145 0 0 47 3 32 6 41 46.5 36 103 -47 47 21 7 46 46 1 47 34 28 46 32 48 -0.72 -144 0 0 47 17 34 6 41 42.9 37 104 -48 47 35 8 47 0 5 47 48 29 46 46 52 -0.72 -143 0 0 47 31 23 6 41 39.4 37 105 -48 47 48 56 47 13 55 48 2 15 47 0 43 -0.72 -142 0 0 47 44 58 6 41 35.8 38 106 -49 48 2 29 47 27 31 48 15 48 47 14 21 -0.72 -141 0 0 47 58 20 6 41 32.1 39 107 -49 48 15 50 47 40 54 48 29 7 47 27 44 -0.72 -140 0 0 48 11 27 6 41 28.5 39 108 -50 48 28 56 47 54 2 48 42 12 47 40 54 -0.72 -139 0 0 48 24 20 6 41 24.8 40 109 -50 48 41 48 48 6 57 48 55 4 47 53 50 -0.72 -138 0 0 48 37 0 6 41 21.1 40 110 -51 48 54 26 48 19 38 49 7 41 48 6 31 -0.72 -137 0 0 48 49 25 6 41 17.4 41 111 -51 49 6 50 48 32 5 49 20 4 48 18 59 -0.72 -136 0 0 49 1 36 6 41 13.7 41 112 -52 49 19 0 48 44 17 49 32 12 48 31 13 -0.72 -135 0 0 49 13 33 6 41 9.9 42 113 -52 49 30 55 48 56 15 49 44 7 48 43 12 -0.72 -134 0 0 49 25 16 6 41 6.1 42 114 -53 49 42 37 49 7 59 49 55 47 48 54 57 -0.72 -133 0 0 49 36 44 6 41 2.3 43 116 -53 49 54 4 49 19 29 50 7 13 49 6 28 -0.72 -132 0 0 49 47 59 6 40 58.5 43 117 -54 50 5 17 49 30 45 50 18 25 49 17 44 -0.72 -131 0 0 49 58 59 6 40 54.7 44 118 -54 50 16 15 49 41 46 50 29 23 49 28 46 -0.72 -130 0 0 50 9 44 6 40 50.9 44 119 -54 50 26 59 49 52 33 50 40 6 49 39 34 -0.72 -129 0 0 50 20 15 6 40 47.1 45 120 -55 50 37 29 50 3 5 50 50 35 49 50 8 -0.72 -128 0 0 50 30 32 6 40 43.2 45 122 -55 50 47 44 50 13 23 51 0 49 50 0 27 -0.72 -127 0 0 50 40 34 6 40 39.3 46 123 -56 50 57 46 50 23 27 51 10 49 50 10 31 -0.72 -126 0 0 50 50 22 6 40 35.5 46 124 -56 51 7 32 50 33 16 51 20 35 50 20 22 -0.72 -125 0 0 50 59 56 6 40 31.6 46 125 -56 51 17 5 50 42 51 51 30 6 50 29 58 -0.72 -124 0 0 51 9 15 6 40 27.7 47 127 -57 51 26 23 50 52 12 51 39 23 50 39 19 -0.72 -123 0 0 51 18 20 6 40 23.8 47 128 -57 51 35 26 51 1 18 51 48 26 50 48 26 -0.72 -122 0 0 51 27 11 6 40 19.9 48 129 -57 51 44 16 51 10 10 51 57 14 50 57 19 -0.72 -121 0 0 51 35 47 6 40 16.0 48 131 -57 51 52 50 51 18 47 52 5 48 51 5 57 -0.72 -120 0 0 51 44 9 6 40 12.0 48 132 -58 52 1 11 51 27 10 52 14 8 51 14 21 -0.72 -119 0 0 51 52 16 6 40 8.1 49 133 -58 52 9 17 51 35 19 52 22 13 51 22 31 -0.72 -118 0 0 52 0 10 6 40 4.2 49 135 -58 52 17 9 51 43 13 52 30 4 51 30 26 -0.72 -117 0 0 52 7 48 6 40 0.3 49 136 -58 52 24 47 51 50 53 52 37 41 51 38 7 -0.72 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31 53 9 2 53 55 15 52 56 25 -0.73 -103 0 0 53 30 6 6 39 5.0 53 157 -60 53 46 51 53 13 24 53 59 35 53 0 47 -0.73 -102 0 0 53 34 13 6 39 1.1 53 158 -60 53 50 58 53 17 32 54 3 41 53 4 56 -0.73 -101 0 0 53 38 6 6 38 57.1 53 160 -60 53 54 51 53 21 26 54 7 33 53 8 50 -0.73 -100 0 0 53 41 46 6 38 53.2 53 161 -60 53 58 29 53 25 6 54 11 12 53 12 31 -0.73 - 99 0 0 53 45 12 6 38 49.2 53 163 -60 54 1 55 53 28 32 54 14 36 53 15 58 -0.73 - 98 0 0 53 48 23 6 38 45.3 53 164 -59 54 5 6 53 31 45 54 17 47 53 19 11 -0.73 - 97 0 0 53 51 21 6 38 41.4 54 166 -59 54 8 3 53 34 43 54 20 44 53 22 9 -0.73 - 96 0 0 53 54 6 6 38 37.4 54 168 -59 54 10 47 53 37 28 54 23 28 53 24 54 -0.73 - 95 0 0 53 56 36 6 38 33.5 54 169 -59 54 13 17 53 39 59 54 25 57 53 27 26 -0.73 - 94 0 0 53 58 53 6 38 29.6 54 171 -59 54 15 33 53 42 16 54 28 13 53 29 43 -0.73 - 93 0 0 54 0 56 6 38 25.6 54 172 -59 54 17 36 53 44 19 54 30 15 53 31 46 -0.73 - 92 0 0 54 2 45 6 38 21.7 54 174 -59 54 19 24 53 46 8 54 32 4 53 33 36 -0.73 - 91 0 0 54 4 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27 -0.73 - 78 0 0 54 4 11 6 37 27.0 53 196 -55 54 20 51 53 47 35 54 33 30 53 35 4 -0.73 - 77 0 0 54 2 35 6 37 23.1 53 198 -55 54 19 15 53 45 59 54 31 54 53 33 26 -0.73 - 76 0 0 54 0 44 6 37 19.2 53 199 -55 54 17 24 53 44 8 54 30 4 53 31 35 -0.73 - 75 0 0 53 58 40 6 37 15.3 53 201 -54 54 15 21 53 42 3 54 28 1 53 29 31 -0.73 - 74 0 0 53 56 22 6 37 11.4 53 202 -54 54 13 3 53 39 45 54 25 43 53 27 12 -0.73 - 73 0 0 53 53 50 6 37 7.6 52 204 -54 54 10 32 53 37 13 54 23 12 53 24 39 -0.73 - 72 0 0 53 51 5 6 37 3.7 52 205 -53 54 7 47 53 34 27 54 20 28 53 21 53 -0.73 - 71 0 0 53 48 6 6 36 59.8 52 207 -53 54 4 48 53 31 27 54 17 29 53 18 53 -0.73 - 70 0 0 53 44 52 6 36 56.0 52 208 -53 54 1 35 53 28 13 54 14 17 53 15 38 -0.73 - 69 0 0 53 41 25 6 36 52.1 51 210 -52 53 58 9 53 24 45 54 10 51 53 12 10 -0.73 - 68 0 0 53 37 44 6 36 48.3 51 211 -52 53 54 28 53 21 4 54 7 11 53 8 28 -0.73 - 67 0 0 53 33 49 6 36 44.4 51 213 -51 53 50 34 53 17 8 54 3 17 53 4 32 -0.73 - 66 0 0 53 29 40 6 36 40.6 51 214 -51 53 46 26 53 12 58 53 59 10 53 0 22 -0.73 - 65 0 0 53 25 18 6 36 36.8 50 216 -50 53 42 4 53 8 35 53 54 48 52 55 58 -0.73 - 64 0 0 53 20 41 6 36 32.9 50 217 -50 53 37 28 53 3 57 53 50 13 52 51 20 -0.73 - 63 0 0 53 15 50 6 36 29.1 50 218 -50 53 32 38 52 59 6 53 45 23 52 46 28 -0.73 - 62 0 0 53 10 45 6 36 25.3 50 220 -49 53 27 34 52 54 0 53 40 20 52 41 21 -0.73 - 61 0 0 53 5 26 6 36 21.5 49 221 -49 53 22 16 52 48 40 53 35 3 52 36 1 -0.73 - 60 0 0 52 59 53 6 36 17.7 49 223 -48 53 16 44 52 43 7 53 29 31 52 30 26 -0.73 - 59 0 0 52 54 6 6 36 13.9 49 224 -48 53 10 58 52 37 19 53 23 46 52 24 38 -0.73 - 58 0 0 52 48 5 6 36 10.1 48 225 -47 53 4 57 52 31 16 53 17 46 52 18 35 -0.73 - 57 0 0 52 41 50 6 36 6.3 48 227 -47 52 58 43 52 25 0 53 11 33 52 12 18 -0.73 - 56 0 0 52 35 20 6 36 2.5 47 228 -46 52 52 14 52 18 29 53 5 5 52 5 46 -0.73 - 55 0 0 52 28 36 6 35 58.8 47 229 -46 52 45 32 52 11 45 52 58 23 51 59 1 -0.73 - 54 0 0 52 21 38 6 35 55.0 47 231 -45 52 38 35 52 4 46 52 51 27 51 52 1 -0.73 - 53 0 0 52 14 26 6 35 51.3 46 232 -45 52 31 24 51 57 32 52 44 17 51 44 47 -0.73 - 52 0 0 52 7 0 6 35 47.5 46 233 -44 52 23 58 51 50 4 52 36 52 51 37 18 -0.73 - 51 0 0 51 59 19 6 35 43.8 46 234 -44 52 16 19 51 42 22 52 29 13 51 29 35 -0.73 - 50 0 0 51 51 23 6 35 40.1 45 236 -43 52 8 24 51 34 26 52 21 20 51 21 38 -0.73 - 49 0 0 51 43 14 6 35 36.4 45 237 -43 52 0 16 51 26 15 52 13 13 51 13 26 -0.73 - 48 0 0 51 34 50 6 35 32.7 44 238 -42 51 51 53 51 17 50 52 4 51 51 5 0 -0.73 - 47 0 0 51 26 12 6 35 29.0 44 239 -42 51 43 16 51 9 11 51 56 15 50 56 20 -0.73 - 46 0 0 51 17 19 6 35 25.3 43 240 -41 51 34 25 51 0 17 51 47 24 50 47 25 -0.73 - 45 0 0 51 8 12 6 35 21.7 43 242 -40 51 25 19 50 51 8 51 38 20 50 38 16 -0.73 - 44 0 0 50 58 50 6 35 18.1 42 243 -40 51 15 59 50 41 46 51 29 0 50 28 52 -0.73 - 43 0 0 50 49 14 6 35 14.4 42 244 -39 51 6 24 50 32 8 51 19 27 50 19 14 -0.73 - 42 0 0 50 39 24 6 35 10.8 41 245 -39 50 56 35 50 22 17 51 9 38 50 9 21 -0.73 - 41 0 0 50 29 19 6 35 7.2 41 246 -38 50 46 32 50 12 10 50 59 36 49 59 14 -0.73 - 40 0 0 50 19 0 6 35 3.7 40 247 -38 50 36 14 50 1 50 50 49 19 49 48 52 -0.73 - 39 0 0 50 8 26 6 35 0.1 40 248 -37 50 25 41 49 51 15 50 38 48 49 38 16 -0.73 - 38 0 0 49 57 38 6 34 56.6 39 249 -36 50 14 54 49 40 25 50 28 2 49 27 26 -0.73 - 37 0 0 49 46 36 6 34 53.1 39 251 -36 50 3 53 49 29 22 50 17 2 49 16 21 -0.73 - 36 0 0 49 35 19 6 34 49.6 38 252 -35 49 52 38 49 18 3 50 5 47 49 5 2 -0.73 - 35 0 0 49 23 47 6 34 46.1 38 253 -35 49 41 8 49 6 31 49 54 19 48 53 28 -0.73 - 34 0 0 49 12 2 6 34 42.7 37 254 -34 49 29 24 48 54 44 49 42 35 48 41 41 -0.73 - 33 0 0 49 0 2 6 34 39.3 37 255 -33 49 17 25 48 42 43 49 30 38 48 29 38 -0.73 - 32 0 0 48 47 48 6 34 35.9 36 256 -33 49 5 13 48 30 27 49 18 26 48 17 22 -0.73 - 31 0 0 48 35 20 6 34 32.6 35 257 -32 48 52 46 48 17 58 49 6 0 48 4 51 -0.73 - 30 0 0 48 22 37 6 34 29.2 35 258 -31 48 40 4 48 5 14 48 53 20 47 52 6 -0.73 - 29 0 0 48 9 41 6 34 25.9 34 259 -31 48 27 9 47 52 16 48 40 26 47 39 8 -0.73 - 28 0 0 47 56 30 6 34 22.7 34 260 -30 48 14 0 47 39 4 48 27 18 47 25 55 -0.73 - 27 0 0 47 43 5 6 34 19.4 33 261 -29 48 0 37 47 25 38 48 13 55 47 12 28 -0.73 - 26 0 0 47 29 27 6 34 16.2 32 261 -29 47 46 59 47 11 58 48 0 19 46 58 47 -0.73 - 25 0 0 47 15 35 6 34 13.1 32 262 -28 47 33 8 46 58 5 47 46 29 46 44 53 -0.73 - 24 0 0 47 1 29 6 34 9.9 31 263 -27 47 19 4 46 43 58 47 32 26 46 30 44 -0.73 - 23 0 0 46 47 9 6 34 6.9 31 264 -27 47 4 45 46 29 37 47 18 8 46 16 23 -0.73 - 22 0 0 46 32 36 6 34 3.8 30 265 -26 46 50 13 46 15 3 47 3 37 46 1 47 -0.73 - 21 0 0 46 17 49 6 34 0.8 29 266 -25 46 35 28 46 0 15 46 48 53 45 46 59 -0.73 - 20 0 0 46 2 50 6 33 57.8 29 267 -24 46 20 30 45 45 14 46 33 55 45 31 57 -0.73 - 19 0 0 45 47 37 6 33 54.9 28 268 -24 46 5 18 45 30 0 46 18 44 45 16 42 -0.73 - 18 0 0 45 32 11 6 33 52.1 27 269 -23 45 49 53 45 14 33 46 3 20 45 1 14 -0.73 - 17 0 0 45 16 32 6 33 49.3 27 269 -22 45 34 15 44 58 53 45 47 44 44 45 34 -0.73 - 16 0 0 45 0 41 6 33 46.5 26 270 -22 45 18 25 44 43 1 45 31 54 44 29 40 -0.73 - 15 0 0 44 44 37 6 33 43.8 25 271 -21 45 2 22 44 26 56 45 15 52 44 13 35 -0.73 - 14 0 0 44 28 21 6 33 41.1 24 272 -20 44 46 7 44 10 38 44 59 38 43 57 17 -0.73 - 13 0 0 44 11 52 6 33 38.5 24 273 -19 44 29 40 43 54 9 44 43 11 43 40 47 -0.73 - 12 0 0 43 55 12 6 33 36.0 23 273 -19 44 13 0 43 37 28 44 26 32 43 24 5 -0.73 - 11 0 0 43 38 20 6 33 33.5 22 274 -18 43 56 9 43 20 35 44 9 42 43 7 11 -0.73 - 10 0 0 43 21 17 6 33 31.1 21 275 -17 43 39 7 43 3 31 43 52 40 42 50 6 -0.73 - 9 0 0 43 4 2 6 33 28.7 21 276 -16 43 21 53 42 46 15 43 35 27 42 32 50 -0.73 - 8 0 0 42 46 36 6 33 26.4 20 276 -15 43 4 28 42 28 49 43 18 2 42 15 23 -0.73 - 7 0 0 42 28 59 6 33 24.2 19 277 -15 42 46 52 42 11 11 43 0 27 41 57 45 -0.74 - 6 0 0 42 11 12 6 33 22.1 18 278 -14 42 29 6 41 53 24 42 42 41 41 39 57 -0.74 - 5 0 0 41 53 15 6 33 20.0 18 279 -13 42 11 9 41 35 26 42 24 45 41 21 58 -0.74 - 4 0 0 41 35 8 6 33 18.0 17 279 -12 41 53 3 41 17 18 42 6 39 41 3 50 -0.74 - 3 0 0 41 16 51 6 33 16.1 16 280 -11 41 34 46 40 59 1 41 48 23 40 45 33 -0.74 - 2 0 0 40 58 25 6 33 14.2 15 281 -11 41 16 21 40 40 34 41 29 58 40 27 6 -0.74 - 1 0 0 40 39 50 6 33 12.5 15 281 -10 40 57 46 40 21 58 41 11 24 40 8 30 -0.74 0 0 0 40 21 6 6 33 10.8 14 282 -9 40 39 3 40 3 14 40 52 41 39 49 45 -0.75 1 0 0 40 2 14 6 33 9.2 13 283 -8 40 20 11 39 44 22 40 33 50 39 30 52 -0.75 2 0 0 39 43 14 6 33 7.7 12 283 -7 40 1 11 39 25 21 40 14 50 39 11 52 -0.75 3 0 0 39 24 6 6 33 6.3 11 284 -7 39 42 4 39 6 13 39 55 43 38 52 44 -0.75 4 0 0 39 4 52 6 33 4.9 10 285 -6 39 22 49 38 46 58 39 36 28 38 33 28 -0.76 5 0 0 38 45 30 6 33 3.7 10 285 -5 39 3 28 38 27 36 39 17 7 38 14 6 -0.76 6 0 0 38 26 2 6 33 2.6 9 286 -4 38 44 0 38 8 8 38 57 39 37 54 38 -0.76 7 0 0 38 6 27 6 33 1.5 8 287 -3 38 24 25 37 48 34 38 38 5 37 35 3 -0.77 8 0 0 37 46 47 6 33 0.6 7 287 -2 38 4 45 37 28 54 38 18 25 37 15 23 -0.78 9 0 0 37 27 2 6 32 59.7 6 288 -1 37 45 0 37 9 8 37 58 40 36 55 38 -0.79 10 0 0 37 7 12 6 32 59.0 5 289 -1 37 25 10 36 49 19 37 38 49 36 35 48 -0.80 11 0 0 36 47 18 6 32 58.4 5 289 0 37 5 16 36 29 24 37 18 55 36 15 54 -0.82 12 0 0 36 27 20 6 32 57.8 4 290 1 36 45 17 36 9 26 36 58 56 35 55 56 -0.84 13 0 0 36 7 18 6 32 57.4 3 290 2 36 25 16 35 49 25 36 38 54 35 35 55 -0.88 14 0 0 35 47 14 6 32 57.1 2 291 3 36 5 11 35 29 21 36 18 49 35 15 51 -0.96 15 0 0 35 27 6 6 32 56.9 1 291 4 35 45 3 35 9 14 35 58 42 34 55 45 -1.17 16 0 0 35 6 57 6 32 56.8 0 292 5 35 24 54 34 49 5 35 38 32 .. .. .. -3.97 Uncertainty in time = +/- 4 secs Prediction of 2022 Aug 14.8 Data for the target star ------------------------ * name: UCAC4 541-037650 * constellation : Gemini * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 07 05 38.8040 DE: +18 05 04.704 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 07 05 38.8040 DE: +18 05 04.704 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 13.5 * B mag [mag]: 13.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (21900) Orus asteroid class: approx. diameter [km]: 50 approx. diameter ["]: 0.017 distance from Earth [AU]: 3.97770 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#37 date of fit: 2019 Oct 14 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): 0.025", 0.002", 103.5° remarks: * orbital elements for (21900)Orus : Mean anomaly = 21.5568349566 deg Arg. of pericenter = 181.9707065290 deg Long. of node = 258.5539875316 deg Inclination = 8.4687235407 deg Eccentricity = 0.0377927187 Semimajor axis = 5.1240124550 AU Perihelion dist = 4.9303620937 AU Mag: H = 10.11, G = 0.15 Epoch of elements : MJD 60305.27652563 TDT (2023 Dec 27.2765) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#372019Oct14,3.04,2023,12,27,6.636584,-0.012042,0.584764,-9.261472,-0.183103,-0.001085,0.000597,0.000001,0.000000 -88.2790,18.0482,80.66,-23.33,False UCAC4 541-037650,7.09411223,18.0846399,13.70,13.45,13.32,0.0,0,,7.11768255,18.0482188,3.42,3.12,0,0,0 21900,Orus,16.82,49.8,3.9777,0,0,-1.435,-0.41,,4.0 0,21.5333,2023,12,27,181.9707,258.5540,8.4687,0.03779,5.12401,4.93036,10.09,5.0,0.15 1.379,0.0250,0.0018,103,0.0065,Known errors,-1.00,-1,-1,-1 20231227_037650,59805.82 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Aug 14, 19:40 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org