IOTA/IOTA-ES occultation update for (45440) 2000 AQ177 / UCAC4 535-017365 event on 2024 Dec 18, 10:54 UT Visible from Summary ------- On 2024 Dec 18 UT, the 9.91707092687017 km diameter asteroid (45440) 2000 AQ177 will occult a 9.0 mag star in the constellation Taurus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 8.54 mag to 17.50 mag (the magnitude of the asteroid) for at most 0.980 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: 67 * date and approx. time of event: 2024 Dec 18, 10:50 - 2024 Dec 18, 10:57 * geocentric midpoint of event [JD]: 2460662.95420409 * magnitude of target star: 8.96 * magnitude drop [mag]: 8.54 * estimated maximum duration [s]: 0.980 * Moon: 89 % sunlit, 41° distance * Sun: 174° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 33 * 1 sigma uncertainty interval [path widths]: +/- 0.89 * 1 sigma uncertainty interval [seconds]: +/- 1.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.022, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.022", 0.005", 97°) * approx speed of asteroid's shadow [km/s]: 13.7069 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 535-017365 by 45440 2000 AQ177 on 2024 Dec 18 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 163 0 0 .. .. .... .. .. .. .. .. .. -70 28 42 .. .. .. -69 57 3 .. .. .. ... .. .. ... .. .. .... 164 0 0 -70 11 10 10 57 11.3 0 29 6 -69 53 2 -70 29 46 -69 21 57 .. .. .. - 70 2 33 - 70 19 54 .... 165 0 0 -69 35 3 10 57 11.1 1 28 5 -69 17 15 -69 53 17 -68 46 43 -70 26 40 - 69 26 35 - 69 43 37 1.29 166 0 0 -68 58 52 10 57 10.8 2 27 5 -68 41 24 -69 16 44 -68 11 24 -69 49 25 - 68 50 34 - 69 7 15 1.66 167 0 0 -68 22 39 10 57 10.3 3 26 4 -68 5 31 -68 40 9 -67 36 3 -69 12 9 - 68 14 30 - 68 30 52 1.83 168 0 0 -67 46 27 10 57 9.6 3 25 3 -67 29 38 -68 3 36 -67 0 42 -68 34 56 - 67 38 27 - 67 54 31 1.93 169 0 0 -67 10 18 10 57 8.7 4 24 2 -66 53 48 -67 27 8 -66 25 23 -67 57 48 - 67 2 28 - 67 18 13 1.99 170 0 0 -66 34 15 10 57 7.7 5 23 2 -66 18 4 -66 50 45 -65 50 9 -67 20 48 - 66 26 34 - 66 42 0 2.04 171 0 0 -65 58 20 10 57 6.4 5 22 1 -65 42 27 -66 14 31 -65 15 1 -66 43 57 - 65 50 47 - 66 5 56 2.07 172 0 0 -65 22 34 10 57 5.0 6 21 0 -65 6 58 -65 38 27 -64 40 2 -66 7 17 - 65 15 10 - 65 30 2 2.10 173 0 0 -64 47 0 10 57 3.4 7 20 0 -64 31 41 -65 2 35 -64 5 12 -65 30 51 - 64 39 44 - 64 54 19 2.12 174 0 0 -64 11 39 10 57 1.6 7 19 -1 -63 56 37 -64 26 56 -63 30 35 -64 54 40 - 64 4 31 - 64 18 50 2.13 175 0 0 -63 36 33 10 56 59.7 8 19 -2 -63 21 47 -63 51 34 -62 56 12 -64 18 46 - 63 29 33 - 63 43 37 2.15 176 0 0 -63 1 44 10 56 57.5 9 18 -2 -62 47 13 -63 16 29 -62 22 4 -63 43 10 - 62 54 51 - 63 8 40 2.16 177 0 0 -62 27 13 10 56 55.2 10 17 -3 -62 12 57 -62 41 42 -61 48 12 -63 7 54 - 62 20 27 - 62 34 2 2.17 178 0 0 -61 53 1 10 56 52.7 10 16 -4 -61 39 0 -62 7 15 -61 14 39 -62 32 59 - 61 46 22 - 61 59 43 2.18 179 0 0 -61 19 10 10 56 50.0 11 15 -4 -61 5 23 -61 33 10 -60 41 25 -61 58 26 - 61 12 38 - 61 25 46 2.18 -180 0 0 -60 45 41 10 56 47.2 12 14 -5 -60 32 7 -60 59 27 -60 8 32 -61 24 17 - 60 39 15 - 60 52 10 2.19 -179 0 0 -60 12 35 10 56 44.1 12 13 -6 -59 59 14 -60 26 7 -59 36 0 -60 50 32 - 60 6 15 - 60 18 58 2.20 -178 0 0 -59 39 53 10 56 41.0 13 12 -6 -59 26 44 -59 53 13 -59 3 51 -60 17 14 - 59 33 39 - 59 46 10 2.20 -177 0 0 -59 7 37 10 56 37.6 13 11 -7 -58 54 39 -59 20 43 -58 32 7 -59 44 21 - 59 1 28 - 59 13 47 2.21 -176 0 0 -58 35 46 10 56 34.1 14 10 -8 -58 23 0 -58 48 41 -58 0 47 -59 11 56 - 58 29 43 - 58 41 51 2.21 -175 0 0 -58 4 22 10 56 30.5 15 9 -8 -57 51 48 -58 17 6 -57 29 53 -58 40 0 - 57 58 25 - 58 10 22 2.21 -174 0 0 -57 33 27 10 56 26.7 15 8 -9 -57 21 3 -57 45 59 -56 59 26 -58 8 32 - 57 27 34 - 57 39 21 2.22 -173 0 0 -57 2 59 10 56 22.8 16 7 -9 -56 50 46 -57 15 21 -56 29 27 -57 37 34 - 56 57 12 - 57 8 49 2.22 -172 0 0 -56 33 1 10 56 18.7 16 6 -10 -56 20 58 -56 45 13 -55 59 56 -57 7 7 - 56 27 18 - 56 38 46 2.22 -171 0 0 -56 3 33 10 56 14.5 17 5 -11 -55 51 39 -56 15 35 -55 30 53 -56 37 11 - 55 57 55 - 56 9 13 2.22 -170 0 0 -55 34 36 10 56 10.2 17 4 -11 -55 22 51 -55 46 28 -55 2 21 -56 7 47 - 55 29 2 - 55 40 12 2.23 -169 0 0 -55 6 10 10 56 5.7 18 3 -12 -54 54 34 -55 17 53 -54 34 18 -55 38 55 - 55 0 40 - 55 11 41 2.23 -168 0 0 -54 38 16 10 56 1.2 18 2 -12 -54 26 48 -54 49 50 -54 6 47 -55 10 36 - 54 32 50 - 54 43 43 2.23 -167 0 0 -54 10 54 10 55 56.5 19 1 -13 -53 59 34 -54 22 20 -53 39 47 -54 42 50 - 54 5 32 - 54 16 17 2.23 -166 0 0 -53 44 5 10 55 51.7 19 0 -13 -53 32 53 -53 55 22 -53 13 19 -54 15 38 - 53 38 46 - 53 49 24 2.23 -165 0 0 -53 17 49 10 55 46.8 20 359 -13 -53 6 45 -53 28 59 -52 47 24 -53 49 0 - 53 12 34 - 53 23 5 2.23 -164 0 0 -52 52 7 10 55 41.8 20 358 -14 -52 41 10 -53 3 9 -52 22 2 -53 22 57 - 52 46 56 - 52 57 19 2.23 -163 0 0 -52 26 59 10 55 36.8 21 357 -14 -52 16 9 -52 37 54 -51 57 13 -52 57 29 - 52 21 51 - 52 32 8 2.23 -162 0 0 -52 2 25 10 55 31.6 21 356 -15 -51 51 42 -52 13 14 -51 32 57 -52 32 36 - 51 57 21 - 52 7 31 2.24 -161 0 0 -51 38 27 10 55 26.4 21 355 -15 -51 27 50 -51 49 9 -51 9 16 -52 8 18 - 51 33 25 - 51 43 30 2.24 -160 0 0 -51 15 3 10 55 21.0 22 354 -15 -51 4 33 -51 25 39 -50 46 9 -51 44 37 - 51 10 5 - 51 20 3 2.24 -159 0 0 -50 52 16 10 55 15.7 22 353 -16 -50 41 51 -51 2 45 -50 23 38 -51 21 32 - 50 47 20 - 50 57 13 2.24 -158 0 0 -50 30 4 10 55 10.2 22 352 -16 -50 19 45 -50 40 28 -50 1 41 -50 59 4 - 50 25 11 - 50 34 58 2.24 -157 0 0 -50 8 28 10 55 4.7 23 351 -16 -49 58 14 -50 18 46 -49 40 20 -50 37 12 - 50 3 37 - 50 13 19 2.24 -156 0 0 -49 47 28 10 54 59.2 23 350 -17 -49 37 20 -49 57 41 -49 19 34 -50 15 58 - 49 42 40 - 49 52 17 2.24 -155 0 0 -49 27 5 10 54 53.6 23 349 -17 -49 17 2 -49 37 13 -48 59 24 -49 55 20 - 49 22 19 - 49 31 52 2.24 -154 0 0 -49 7 19 10 54 47.9 23 348 -17 -48 57 20 -49 17 22 -48 39 51 -49 35 20 - 49 2 35 - 49 12 3 2.24 -153 0 0 -48 48 10 10 54 42.3 23 347 -17 -48 38 15 -48 58 8 -48 20 54 -49 15 58 - 48 43 28 - 48 52 52 2.24 -152 0 0 -48 29 38 10 54 36.5 24 346 -17 -48 19 48 -48 39 31 -48 2 34 -48 57 13 - 48 24 58 - 48 34 18 2.24 -151 0 0 -48 11 43 10 54 30.8 24 345 -18 -48 1 57 -48 21 33 -47 44 51 -48 39 7 - 48 7 6 - 48 16 21 2.24 -150 0 0 -47 54 26 10 54 25.1 24 344 -18 -47 44 44 -48 4 12 -47 27 44 -48 21 39 - 47 49 51 - 47 59 2 2.24 -149 0 0 -47 37 47 10 54 19.3 24 343 -18 -47 28 9 -47 47 29 -47 11 15 -48 4 48 - 47 33 13 - 47 42 21 2.24 -148 0 0 -47 21 45 10 54 13.5 24 342 -18 -47 12 11 -47 31 24 -46 55 24 -47 48 37 - 47 17 13 - 47 26 18 2.24 -147 0 0 -47 6 22 10 54 7.8 24 341 -18 -46 56 51 -47 15 57 -46 40 10 -47 33 4 - 47 1 52 - 47 10 53 2.24 -146 0 0 -46 51 37 10 54 2.0 24 340 -18 -46 42 9 -47 1 8 -46 25 33 -47 18 9 - 46 47 8 - 46 56 6 2.24 -145 0 0 -46 37 30 10 53 56.2 24 339 -18 -46 28 5 -46 46 58 -46 11 35 -47 3 54 - 46 33 3 - 46 41 58 2.24 -144 0 0 -46 24 2 10 53 50.5 24 338 -18 -46 14 40 -46 33 27 -45 58 14 -46 50 17 - 46 19 36 - 46 28 28 2.24 -143 0 0 -46 11 12 10 53 44.7 24 337 -18 -46 1 53 -46 20 34 -45 45 31 -46 37 19 - 46 6 47 - 46 15 37 2.24 -142 0 0 -45 59 1 10 53 39.0 24 336 -18 -45 49 44 -46 8 21 -45 33 27 -46 25 1 - 45 54 37 - 46 3 25 2.25 -141 0 0 -45 47 28 10 53 33.3 24 335 -18 -45 38 14 -45 56 46 -45 22 1 -46 13 22 - 45 43 6 - 45 51 51 2.25 -140 0 0 -45 36 34 10 53 27.7 24 334 -18 -45 27 22 -45 45 50 -45 11 14 -46 2 22 - 45 32 13 - 45 40 57 2.25 -139 0 0 -45 26 20 10 53 22.1 23 333 -18 -45 17 10 -45 35 33 -45 1 5 -45 52 1 - 45 21 59 - 45 30 41 2.25 -138 0 0 -45 16 44 10 53 16.5 23 332 -17 -45 7 36 -45 25 56 -44 51 34 -45 42 20 - 45 12 25 - 45 21 4 2.25 -137 0 0 -45 7 48 10 53 11.0 23 331 -17 -44 58 42 -45 16 57 -44 42 43 -45 33 18 - 45 3 29 - 45 12 7 2.25 -136 0 0 -44 59 31 10 53 5.5 23 330 -17 -44 50 26 -45 8 38 -44 34 30 -45 24 57 - 44 55 13 - 45 3 49 2.25 -135 0 0 -44 51 53 10 53 0.1 23 329 -17 -44 42 49 -45 0 59 -44 26 56 -45 17 14 - 44 47 35 - 44 56 10 2.25 -134 0 0 -44 44 54 10 52 54.7 22 328 -17 -44 35 52 -44 53 59 -44 20 1 -45 10 12 - 44 40 38 - 44 49 11 2.25 -133 0 0 -44 38 35 10 52 49.4 22 327 -16 -44 29 34 -44 47 39 -44 13 45 -45 3 49 - 44 34 19 - 44 42 52 2.25 -132 0 0 -44 32 55 10 52 44.1 22 326 -16 -44 23 56 -44 41 58 -44 8 9 -44 58 7 - 44 28 40 - 44 37 11 2.25 -131 0 0 -44 27 55 10 52 39.0 21 325 -16 -44 18 57 -44 36 57 -44 3 11 -44 53 4 - 44 23 40 - 44 32 11 2.26 -130 0 0 -44 23 35 10 52 33.9 21 324 -16 -44 14 37 -44 32 36 -43 58 53 -44 48 42 - 44 19 20 - 44 27 50 2.26 -129 0 0 -44 19 55 10 52 28.9 21 323 -15 -44 10 57 -44 28 55 -43 55 14 -44 44 59 - 44 15 40 - 44 24 10 2.26 -128 0 0 -44 16 54 10 52 24.0 20 322 -15 -44 7 57 -44 25 54 -43 52 15 -44 41 57 - 44 12 40 - 44 21 8 2.26 -127 0 0 -44 14 33 10 52 19.2 20 322 -15 -44 5 36 -44 23 32 -43 49 55 -44 39 35 - 44 10 19 - 44 18 47 2.26 -126 0 0 -44 12 52 10 52 14.4 19 321 -14 -44 3 56 -44 21 51 -43 48 14 -44 37 53 - 44 8 38 - 44 17 6 2.26 -125 0 0 -44 11 51 10 52 9.8 19 320 -14 -44 2 55 -44 20 50 -43 47 14 -44 36 52 - 44 7 37 - 44 16 5 2.26 -124 0 0 -44 11 30 10 52 5.3 19 319 -13 -44 2 34 -44 20 29 -43 46 53 -44 36 31 - 44 7 16 - 44 15 44 2.27 -123 0 0 -44 11 49 10 52 0.8 18 318 -13 -44 2 53 -44 20 48 -43 47 11 -44 36 51 - 44 7 35 - 44 16 4 2.27 -122 0 0 -44 12 48 10 51 56.5 18 317 -12 -44 3 52 -44 21 48 -43 48 10 -44 37 51 - 44 8 34 - 44 17 3 2.27 -121 0 0 -44 14 28 10 51 52.3 17 316 -12 -44 5 31 -44 23 28 -43 49 48 -44 39 32 - 44 10 14 - 44 18 43 2.27 -120 0 0 -44 16 48 10 51 48.2 17 316 -12 -44 7 50 -44 25 48 -43 52 6 -44 41 53 - 44 12 33 - 44 21 3 2.27 -119 0 0 -44 19 48 10 51 44.3 16 315 -11 -44 10 49 -44 28 49 -43 55 4 -44 44 56 - 44 15 33 - 44 24 3 2.28 -118 0 0 -44 23 28 10 51 40.4 16 314 -10 -44 14 29 -44 32 30 -43 58 42 -44 48 38 - 44 19 13 - 44 27 44 2.28 -117 0 0 -44 27 49 10 51 36.7 15 313 -10 -44 18 48 -44 36 52 -44 3 0 -44 53 2 - 44 23 33 - 44 32 5 2.28 -116 0 0 -44 32 50 10 51 33.1 14 312 -9 -44 23 49 -44 41 55 -44 7 58 -44 58 6 - 44 28 34 - 44 37 7 2.28 -115 0 0 -44 38 32 10 51 29.7 14 311 -9 -44 29 29 -44 47 37 -44 13 36 -45 3 52 - 44 34 15 - 44 42 49 2.29 -114 0 0 -44 44 54 10 51 26.4 13 311 -8 -44 35 50 -44 54 1 -44 19 54 -45 10 18 - 44 40 36 - 44 49 12 2.29 -113 0 0 -44 51 56 10 51 23.2 13 310 -8 -44 42 51 -45 1 5 -44 26 53 -45 17 25 - 44 47 38 - 44 56 15 2.29 -112 0 0 -44 59 40 10 51 20.2 12 309 -7 -44 50 32 -45 8 50 -44 34 31 -45 25 13 - 44 55 20 - 45 3 59 2.30 -111 0 0 -45 8 3 10 51 17.3 11 308 -7 -44 58 54 -45 17 16 -44 42 50 -45 33 43 - 45 3 43 - 45 12 24 2.30 -110 0 0 -45 17 8 10 51 14.6 11 308 -6 -45 7 56 -45 26 22 -44 51 49 -45 42 53 - 45 12 47 - 45 21 29 2.30 -109 0 0 -45 26 53 10 51 12.0 10 307 -5 -45 17 39 -45 36 10 -45 1 28 -45 52 44 - 45 22 31 - 45 31 16 2.31 -108 0 0 -45 37 18 10 51 9.6 9 306 -5 -45 28 2 -45 46 38 -45 11 47 -46 3 17 - 45 32 55 - 45 41 42 2.31 -107 0 0 -45 48 24 10 51 7.4 9 305 -4 -45 39 6 -45 57 46 -45 22 46 -46 14 30 - 45 44 0 - 45 52 50 2.32 -106 0 0 -46 0 11 10 51 5.3 8 305 -3 -45 50 50 -46 9 36 -45 34 26 -46 26 24 - 45 55 46 - 46 4 38 2.33 -105 0 0 -46 12 39 10 51 3.4 7 304 -3 -46 3 15 -46 22 6 -45 46 45 -46 39 0 - 46 8 12 - 46 17 6 2.33 -104 0 0 -46 25 47 10 51 1.7 7 303 -2 -46 16 20 -46 35 17 -45 59 45 -46 52 17 - 46 21 18 - 46 30 16 2.34 -103 0 0 -46 39 35 10 51 0.1 6 302 -1 -46 30 5 -46 49 9 -46 13 25 -47 6 14 - 46 35 5 - 46 44 6 2.35 -102 0 0 -46 54 4 10 50 58.7 5 302 -1 -46 44 30 -47 3 41 -46 27 45 -47 20 53 - 46 49 32 - 46 58 36 2.37 -101 0 0 -47 9 13 10 50 57.5 5 301 0 -46 59 36 -47 18 54 -46 42 44 -47 36 12 - 47 4 40 - 47 13 47 2.38 -100 0 0 -47 25 3 10 50 56.4 4 300 1 -47 15 22 -47 34 48 -46 58 24 -47 52 13 - 47 20 28 - 47 29 39 2.41 - 99 0 0 -47 41 33 10 50 55.5 3 299 1 -47 31 49 -47 51 22 -47 14 43 -48 8 54 - 47 36 56 - 47 46 11 2.44 - 98 0 0 -47 58 44 10 50 54.9 2 299 2 -47 48 55 -48 8 37 -47 31 42 -48 26 17 - 47 54 5 - 48 3 23 2.49 - 97 0 0 -48 16 34 10 50 54.4 2 298 3 -48 6 41 -48 26 32 -47 49 21 -48 44 20 - 48 11 53 - 48 21 16 2.59 - 96 0 0 -48 35 5 10 50 54.0 1 297 4 -48 25 7 -48 45 7 -48 7 39 -49 3 3 - 48 30 21 - 48 39 49 2.84 - 95 0 0 -48 54 15 10 50 53.9 0 296 4 -48 44 12 -49 4 22 -48 26 37 .. .. .. - 48 49 29 - 48 59 1 4.83 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 535-017365 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 42 24.4952 DE: +16 57 50.271 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 42 24.4952 DE: +16 57 50.271 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 9.0 * B mag [mag]: 11.3 * Diameter [mas]: 2.70 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (45440) 2000 AQ177 asteroid class: approx. diameter [km]: 10 approx. diameter ["]: 0.008 distance from Earth [AU]: 1.80210 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#47 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): 0.022", 0.005", 96.543° remarks: * orbital elements for (45440)2000 AQ177 : Mean anomaly = 244.0574274398 deg Arg. of pericenter = 331.1544074335 deg Long. of node = 243.5242450663 deg Inclination = 10.7074123158 deg Eccentricity = 0.1286340478 Semimajor axis = 2.6036036136 AU Perihelion dist = 2.2686915420 AU Mag: H = 13.74, G = 0.15 Epoch of elements : MJD 60662.45420575 TDT (2024 Dec 18.4542) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#472023Apr27,0.98,2024,12,18,10.900898,0.221411,-0.884115,-7.504793,-1.879468,0.000053,0.000660,0.000001,0.000000 -165.0915,16.9767,15.69,-23.40,False UCAC4 535-017365,5.70680422,16.9639643,11.34,8.96,7.67,2.7,4,,5.73133654,16.9766805,8.54,9.37,0,0,0 45440,2000 AQ177,17.50,13.446,1.8021,0,0,-2.552,-9.17,,1.0,0 0,243.9509,2024,12,18,331.1544,243.5242,10.7074,0.12863,2.60360,2.26869,13.74,5.0,0.15 1.885,0.0217,0.0053,97,0.0091,Known errors,1.00,0,-1,-1 20241218_017365,60140.74 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:52 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org