IOTA/IOTA-ES occultation update for (887) Alinda / TYC 4754-00621-1 event on 2024 Dec 30, 14:39 UT Visible from Summary ------- On 2024 Dec 30 UT, the 5.67340842251315 km diameter asteroid (887) Alinda will occult a 9.3 mag star in the constellation Orion for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 1.73 mag to 10.78 mag (the magnitude of the asteroid) for at most 0.830 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: 71 * date and approx. time of event: 2024 Dec 30, 14:25 - 2024 Dec 30, 14:52 * geocentric midpoint of event [JD]: 2460675.11038229 * magnitude of target star: 9.30 * magnitude drop [mag]: 1.73 * estimated maximum duration [s]: 0.830 * Moon: 0 % sunlit, 143° distance * Sun: 145° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 7 * 1 sigma uncertainty interval [path widths]: +/- 0.81 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.105, +/- 0.019) * 1 sigma uncertainty ellipse (major, minor, PA): (0.105", 0.014", 83°) * approx speed of asteroid's shadow [km/s]: 6.8306 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 4754-00621-1 by 887 Alinda on 2024 Dec 30 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 77 0 0 -72 56 18 14 26 9.1 15 45 16 -72 58 29 -72 54 7 -73 2 2 -72 50 34 .... 78 0 0 -72 43 1 14 26 10.9 16 44 15 -72 45 13 -72 40 48 -72 48 48 -72 37 14 0.55 79 0 0 -72 29 11 14 26 12.9 16 43 15 -72 31 25 -72 26 58 -72 35 2 -72 23 21 0.55 80 0 0 -72 14 48 14 26 14.9 16 42 14 -72 17 3 -72 12 33 -72 20 42 -72 8 54 0.55 81 0 0 -71 59 49 14 26 17.0 17 41 14 -72 2 6 -71 57 33 -72 5 48 -71 53 52 0.55 82 0 0 -71 44 14 14 26 19.3 17 40 14 -71 46 32 -71 41 56 -71 50 16 -71 38 13 0.55 83 0 0 -71 28 1 14 26 21.6 18 39 13 -71 30 20 -71 25 41 -71 34 7 -71 21 55 0.55 84 0 0 -71 11 8 14 26 24.1 18 38 13 -71 13 29 -71 8 47 -71 17 18 -71 4 58 0.55 85 0 0 -70 53 33 14 26 26.7 18 37 12 -70 55 56 -70 51 11 -70 59 47 -70 47 20 0.55 86 0 0 -70 35 16 14 26 29.4 19 36 12 -70 37 40 -70 32 51 -70 41 34 -70 28 58 0.55 87 0 0 -70 16 13 14 26 32.3 19 35 11 -70 18 39 -70 13 47 -70 22 36 -70 9 51 0.55 88 0 0 -69 56 24 14 26 35.3 20 34 11 -69 58 51 -69 53 56 -70 2 51 -69 49 57 0.55 89 0 0 -69 35 45 14 26 38.4 20 33 10 -69 38 15 -69 33 16 -69 42 17 -69 29 14 0.55 90 0 0 -69 14 16 14 26 41.8 21 32 10 -69 16 47 -69 11 45 -69 20 53 -69 7 41 0.55 91 0 0 -68 51 54 14 26 45.3 21 31 9 -68 54 27 -68 49 21 -68 58 35 -68 45 14 0.55 92 0 0 -68 28 37 14 26 49.0 22 30 9 -68 31 12 -68 26 2 -68 35 23 -68 21 51 0.55 93 0 0 -68 4 22 14 26 52.9 22 29 8 -68 6 59 -68 1 45 -68 11 13 -67 57 32 0.55 94 0 0 -67 39 7 14 26 57.0 23 28 8 -67 41 45 -67 36 28 -67 46 3 -67 32 11 0.55 95 0 0 -67 12 49 14 27 1.3 23 27 7 -67 15 30 -67 10 9 -67 19 51 -67 5 49 0.55 96 0 0 -66 45 26 14 27 5.9 24 26 7 -66 48 9 -66 42 44 -66 52 33 -66 38 21 0.55 97 0 0 -66 16 56 14 27 10.8 25 25 6 -66 19 40 -66 14 11 -66 24 8 -66 9 45 0.55 98 0 0 -65 47 14 14 27 15.9 25 24 5 -65 50 1 -65 44 28 -65 54 32 -65 39 58 0.55 99 0 0 -65 16 19 14 27 21.3 26 23 5 -65 19 8 -65 13 31 -65 23 42 -65 8 58 0.55 100 0 0 -64 44 8 14 27 27.1 27 22 4 -64 46 59 -64 41 17 -64 51 36 -64 36 41 0.55 101 0 0 -64 10 38 14 27 33.1 27 21 3 -64 13 31 -64 7 45 -64 18 11 -64 3 5 0.55 102 0 0 -63 35 45 14 27 39.6 28 20 3 -63 38 40 -63 32 50 -63 43 24 -63 28 6 0.55 103 0 0 -62 59 26 14 27 46.4 29 19 2 -63 2 24 -62 56 29 -63 7 11 -62 51 42 0.55 104 0 0 -62 21 40 14 27 53.6 29 18 1 -62 24 39 -62 18 40 -62 29 30 -62 13 50 0.54 105 0 0 -61 42 21 14 28 1.2 30 17 0 -61 45 23 -61 39 20 -61 50 17 -61 34 26 0.54 106 0 0 -61 1 29 14 28 9.3 31 16 -1 -61 4 32 -60 58 26 -61 9 30 -60 53 28 0.54 107 0 0 -60 18 59 14 28 17.8 32 15 -2 -60 22 5 -60 15 54 -60 27 6 -60 10 53 0.54 108 0 0 -59 34 49 14 28 26.8 33 13 -2 -59 37 57 -59 31 42 -59 43 2 -59 26 38 0.54 109 0 0 -58 48 57 14 28 36.4 33 12 -3 -58 52 6 -58 45 47 -58 57 14 -58 40 40 0.54 110 0 0 -58 1 19 14 28 46.5 34 11 -4 -58 4 31 -57 58 8 -58 9 42 -57 52 58 0.54 111 0 0 -57 11 54 14 28 57.2 35 10 -5 -57 15 7 -57 8 41 -57 20 21 -57 3 28 0.54 112 0 0 -56 20 39 14 29 8.6 36 9 -6 -56 23 55 -56 17 24 -56 29 12 -56 12 8 0.54 113 0 0 -55 27 34 14 29 20.5 37 8 -7 -55 30 51 -55 24 17 -55 36 10 -55 18 58 0.54 114 0 0 -54 32 36 14 29 33.1 38 6 -9 -54 35 54 -54 29 17 -54 41 17 -54 23 56 0.54 115 0 0 -53 35 45 14 29 46.5 39 5 -10 -53 39 5 -53 32 25 -53 44 29 -53 27 1 0.54 116 0 0 -52 37 0 14 30 0.5 40 4 -11 -52 40 21 -52 33 38 -52 45 48 -52 28 12 0.54 117 0 0 -51 36 21 14 30 15.2 41 2 -12 -51 39 44 -51 32 59 -51 45 13 -51 27 31 0.54 118 0 0 -50 33 50 14 30 30.8 42 1 -13 -50 37 14 -50 30 27 -50 42 45 -50 24 57 0.54 119 0 0 -49 29 28 14 30 47.0 43 360 -14 -49 32 53 -49 26 3 -49 38 25 -49 20 32 0.54 120 0 0 -48 23 16 14 31 4.1 44 358 -16 -48 26 42 -48 19 51 -48 32 16 -48 14 18 0.55 121 0 0 -47 15 18 14 31 22.0 46 356 -17 -47 18 44 -47 11 52 -47 24 19 -47 6 18 0.55 122 0 0 -46 5 36 14 31 40.7 47 355 -18 -46 9 3 -46 2 10 -46 14 39 -45 56 35 0.55 123 0 0 -44 54 16 14 32 0.1 48 353 -20 -44 57 43 -44 50 49 -45 3 19 -44 45 14 0.55 124 0 0 -43 41 21 14 32 20.4 49 351 -21 -43 44 49 -43 37 54 -43 50 25 -43 32 19 0.55 125 0 0 -42 26 59 14 32 41.4 50 349 -23 -42 30 26 -42 23 32 -42 36 2 -42 17 57 0.55 126 0 0 -41 11 14 14 33 3.1 51 347 -24 -41 14 41 -41 7 47 -41 20 16 -41 2 13 0.55 127 0 0 -39 54 14 14 33 25.6 52 345 -26 -39 57 41 -39 50 48 -40 3 16 -39 45 14 0.55 128 0 0 -38 36 8 14 33 48.8 53 343 -27 -38 39 33 -38 32 42 -38 45 7 -38 27 9 0.55 129 0 0 -37 17 2 14 34 12.7 54 341 -28 -37 20 27 -37 13 37 -37 25 59 -37 8 6 0.55 130 0 0 -35 57 6 14 34 37.2 55 338 -30 -36 0 30 -35 53 43 -36 6 1 -35 48 13 0.56 131 0 0 -34 36 29 14 35 2.2 56 336 -31 -34 39 52 -34 33 7 -34 45 21 -34 27 39 0.56 132 0 0 -33 15 21 14 35 27.7 57 333 -33 -33 18 42 -33 12 0 -33 24 9 -33 6 34 0.56 133 0 0 -31 53 50 14 35 53.7 57 330 -35 -31 57 10 -31 50 30 -32 2 34 -31 45 7 0.56 134 0 0 -30 32 6 14 36 20.1 58 327 -36 -30 35 24 -30 28 49 -30 40 46 -30 23 28 0.56 135 0 0 -29 10 20 14 36 46.8 59 324 -37 -29 13 36 -29 7 4 -29 18 55 -29 1 46 0.57 136 0 0 -27 48 40 14 37 13.7 59 321 -39 -27 51 55 -27 45 26 -27 57 10 -27 40 12 0.57 137 0 0 -26 27 16 14 37 40.8 60 317 -40 -26 30 28 -26 24 4 -26 35 41 -26 18 53 0.57 138 0 0 -25 6 17 14 38 8.1 60 314 -42 -25 9 27 -25 3 7 -25 14 36 -24 57 59 0.57 139 0 0 -23 45 50 14 38 35.4 60 311 -43 -23 48 58 -23 42 42 -23 54 3 -23 37 38 0.57 140 0 0 -22 26 5 14 39 2.6 60 307 -45 -22 29 10 -22 22 59 -22 34 12 -22 17 58 0.58 141 0 0 -21 7 8 14 39 29.8 60 304 -46 -21 10 11 -21 4 5 -21 15 9 -20 59 8 0.58 142 0 0 -19 49 7 14 39 56.8 60 301 -47 -19 52 8 -19 46 6 -19 57 2 -19 41 13 0.58 143 0 0 -18 32 8 14 40 23.7 59 298 -48 -18 35 6 -18 29 9 -18 39 56 -18 24 20 0.58 144 0 0 -17 16 16 14 40 50.3 59 295 -50 -17 19 12 -17 13 20 -17 23 59 -17 8 35 0.59 145 0 0 -16 1 38 14 41 16.5 59 292 -51 -16 4 31 -15 58 44 -16 9 14 -15 54 2 0.59 146 0 0 -14 48 17 14 41 42.4 58 289 -52 -14 51 8 -14 45 25 -14 55 47 -14 40 48 0.59 147 0 0 -13 36 17 14 42 7.9 57 286 -53 -13 39 6 -13 33 28 -13 43 41 -13 28 54 0.59 148 0 0 -12 25 42 14 42 33.0 57 284 -54 -12 28 29 -12 22 56 -12 33 0 -12 18 26 0.59 149 0 0 -11 16 35 14 42 57.6 56 282 -55 -11 19 20 -11 13 51 -11 23 47 -11 9 25 0.60 150 0 0 -10 8 58 14 43 21.7 55 280 -55 -10 11 41 -10 6 16 -10 16 4 -10 1 54 0.60 151 0 0 - 9 2 54 14 43 45.3 54 278 -56 - 9 5 34 - 9 0 14 - 9 9 53 - 8 55 55 0.60 152 0 0 - 7 58 23 14 44 8.4 53 276 -57 - 8 1 1 - 7 55 45 - 8 5 16 - 7 51 30 0.60 153 0 0 - 6 55 26 14 44 30.8 52 274 -57 - 6 58 2 - 6 52 51 - 7 2 14 - 6 48 39 0.60 154 0 0 - 5 54 6 14 44 52.8 51 273 -58 - 5 56 39 - 5 51 32 - 6 0 48 - 5 47 24 0.61 155 0 0 - 4 54 20 14 45 14.1 50 271 -58 - 4 56 51 - 4 51 49 - 5 0 57 - 4 47 44 0.61 156 0 0 - 3 56 10 14 45 34.8 49 270 -58 - 3 58 40 - 3 53 41 - 4 2 42 - 3 49 40 0.61 157 0 0 - 2 59 36 14 45 55.0 48 269 -59 - 3 2 4 - 2 57 9 - 3 6 3 - 2 53 11 0.61 158 0 0 - 2 4 38 14 46 14.5 47 268 -59 - 2 7 3 - 2 2 13 - 2 10 59 - 1 58 17 0.61 159 0 0 - 1 11 14 14 46 33.5 46 267 -59 - 1 13 37 - 1 8 51 - 1 17 30 - 1 4 58 0.61 160 0 0 - 0 19 24 14 46 51.8 45 266 -59 - 0 21 46 - 0 17 2 - 0 25 36 - 0 13 13 0.61 161 0 0 0 30 53 14 47 9.6 43 266 -59 0 28 33 0 33 13 0 24 46 0 37 0 0.61 162 0 0 1 19 38 14 47 26.7 42 265 -59 1 17 20 1 21 56 1 13 35 1 25 40 0.62 163 0 0 2 6 52 14 47 43.3 41 264 -58 2 4 36 2 9 9 2 0 54 2 12 50 0.62 164 0 0 2 52 37 14 47 59.3 40 264 -58 2 50 22 2 54 52 2 46 43 2 58 31 0.62 165 0 0 3 36 53 14 48 14.8 39 263 -58 3 34 40 3 39 7 3 31 3 3 42 43 0.62 166 0 0 4 19 43 14 48 29.6 38 263 -58 4 17 31 4 21 55 4 13 56 4 25 29 0.62 167 0 0 5 1 6 14 48 43.9 37 263 -57 4 58 56 5 3 17 4 55 23 5 6 49 0.62 168 0 0 5 41 6 14 48 57.7 36 262 -57 5 38 56 5 43 15 5 35 27 5 46 45 0.62 169 0 0 6 19 43 14 49 10.9 34 262 -56 6 17 34 6 21 51 6 14 7 6 25 18 0.62 170 0 0 6 56 58 14 49 23.6 33 262 -56 6 54 51 6 59 5 6 51 25 7 2 30 0.62 171 0 0 7 32 53 14 49 35.8 32 262 -55 7 30 48 7 34 59 7 27 24 7 38 22 0.62 172 0 0 8 7 30 14 49 47.5 31 262 -54 8 5 26 8 9 34 8 2 4 8 12 56 0.62 173 0 0 8 40 50 14 49 58.7 30 262 -54 8 38 46 8 42 53 8 35 26 8 46 13 0.62 174 0 0 9 12 54 14 50 9.4 29 262 -53 9 10 51 9 14 56 9 7 33 9 18 14 0.62 175 0 0 9 43 43 14 50 19.6 28 262 -52 9 41 42 9 45 44 9 38 25 9 49 1 0.62 176 0 0 10 13 20 14 50 29.4 27 262 -52 10 11 19 10 15 20 10 8 4 10 18 35 0.62 177 0 0 10 41 44 14 50 38.7 26 262 -51 10 39 45 10 43 44 10 36 31 10 46 57 0.62 178 0 0 11 8 59 14 50 47.5 25 262 -50 11 7 0 11 10 57 11 3 48 11 14 9 0.62 179 0 0 11 35 4 14 50 55.9 23 262 -49 11 33 6 11 37 1 11 29 55 11 40 12 0.62 180 0 0 12 0 1 14 51 3.9 22 262 -49 11 58 4 12 1 57 11 54 54 12 5 7 0.62 -179 0 0 12 23 51 14 51 11.5 21 262 -48 12 21 55 12 25 47 12 18 46 12 28 54 0.62 -178 0 0 12 46 35 14 51 18.6 20 262 -47 12 44 40 12 48 30 12 41 32 12 51 37 0.62 -177 0 0 13 8 14 14 51 25.4 19 262 -46 13 6 20 13 10 9 13 3 14 13 13 14 0.62 -176 0 0 13 28 50 14 51 31.8 18 262 -45 13 26 56 13 30 44 13 23 51 13 33 49 0.62 -175 0 0 13 48 23 14 51 37.7 17 263 -44 13 46 30 13 50 17 13 43 26 13 53 20 0.62 -174 0 0 14 6 55 14 51 43.3 16 263 -44 14 5 2 14 8 47 14 1 59 14 11 50 0.62 -173 0 0 14 24 26 14 51 48.6 15 263 -43 14 22 33 14 26 18 14 19 32 14 29 19 0.62 -172 0 0 14 40 56 14 51 53.4 14 263 -42 14 39 5 14 42 48 14 36 4 14 45 49 0.62 -171 0 0 14 56 28 14 51 57.9 13 263 -41 14 54 37 14 58 19 14 51 37 15 1 19 0.62 -170 0 0 15 11 1 14 52 2.1 12 264 -40 15 9 11 15 12 52 15 6 12 15 15 51 0.62 -169 0 0 15 24 37 14 52 5.8 11 264 -39 15 22 47 15 26 27 15 19 49 15 29 26 0.63 -168 0 0 15 37 17 14 52 9.3 10 264 -38 15 35 27 15 39 6 15 32 29 15 42 4 0.63 -167 0 0 15 49 0 14 52 12.4 9 264 -38 15 47 10 15 50 49 15 44 13 15 53 46 0.63 -166 0 0 15 59 47 14 52 15.2 8 265 -37 15 57 58 16 1 36 15 55 1 16 4 32 0.63 -165 0 0 16 9 40 14 52 17.7 7 265 -36 16 7 51 16 11 28 16 4 55 16 14 24 0.64 -164 0 0 16 18 38 14 52 19.8 6 265 -35 16 16 50 16 20 26 16 13 54 16 23 22 0.64 -163 0 0 16 26 43 14 52 21.6 5 266 -34 16 24 54 16 28 31 16 21 59 16 31 26 0.65 -162 0 0 16 33 54 14 52 23.1 4 266 -33 16 32 6 16 35 42 16 29 11 16 38 36 0.66 -161 0 0 16 40 12 14 52 24.3 3 266 -32 16 38 25 16 42 0 16 35 30 16 44 54 0.68 -160 0 0 16 45 38 14 52 25.2 2 266 -31 16 43 51 16 47 26 16 40 57 16 50 19 0.72 -159 0 0 16 50 12 14 52 25.7 1 267 -30 16 48 25 16 51 59 16 45 31 16 54 53 0.81 -158 0 0 16 53 55 14 52 26.0 0 267 -30 16 52 8 16 55 42 16 49 14 16 58 35 1.39 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.8 Data for the target star ------------------------ * name: TYC 4754-00621-1 * constellation : Orion * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 02 14.1126 DE: -02 50 17.236 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 02 14.1125 DE: -02 50 17.236 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 9.3 * B mag [mag]: 10.2 * Diameter [mas]: 0.20 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (887) Alinda asteroid class: approx. diameter [km]: 6 approx. diameter ["]: 0.083 distance from Earth [AU]: 0.09370 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#441 date of fit: 2023 Jul 08 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): 0.105", 0.014", 82.727° remarks: * orbital elements for (887)Alinda : Mean anomaly = 359.1130975903 deg Arg. of pericenter = 350.4864839514 deg Long. of node = 110.4135035188 deg Inclination = 9.4009126165 deg Eccentricity = 0.5712594522 Semimajor axis = 2.4734728651 AU Perihelion dist = 1.0604781113 AU Mag: H = 13.83, G = -0.12 Epoch of elements : MJD 60674.61042849 TDT (2024 Dec 30.6104) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#4412023Jul08,0.83,2024,12,30,14.649175,0.363355,-0.341694,2.641125,2.808655,0.000494,0.000569,0.000000,0.000000 116.6103,-2.8020,-39.04,-23.11,False TYC 4754-00621-1,5.03725350,-2.8381208,10.17,9.30,8.83,0.2,0,,5.05851862,-2.8020011,1.73,1.74,0,0,0 887,Alinda,10.78,5.687,0.0937,0,0,16.562,263.82,,0.4,0 0,358.9584,2024,12,30,350.4865,110.4135,9.4009,0.57126,2.47347,1.06048,13.83,5.0,-0.12 1.811,0.1053,0.0140,83,0.0678,Known errors,1.03,0,-1,-1 20241230_0621-1,60140.76 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 18:16 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org