IOTA/IOTA-ES occultation update for (29075) 1950 DA / UCAC4 640-013057 event on 2024 Dec 22, 09:34 UT Visible from Summary ------- On 2024 Dec 22 UT, the 1.175 km diameter asteroid (29075) 1950 DA will occult a 13.1 mag star in the constellation Perseus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.48 mag to 20.62 mag (the magnitude of the asteroid) for at most 0.090 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: 21 * date and approx. time of event: 2024 Dec 22, 09:27 - 2024 Dec 22, 09:41 * geocentric midpoint of event [JD]: 2460666.89891821 * magnitude of target star: 13.14 * magnitude drop [mag]: 7.48 * estimated maximum duration [s]: 0.090 * Moon: 56 % sunlit, 116° distance * Sun: 142° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 1 * 1 sigma uncertainty interval [path widths]: +/- 3.23 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.004", 64°) * approx speed of asteroid's shadow [km/s]: 12.6553 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 640-013057 by 29075 1950 DA on 2024 Dec 22 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 128 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -42 33 49 .. .. .. .... 129 0 0 -41 30 58 9 41 40.1 1 33 12 -41 30 18 -41 31 39 -41 26 0 -41 35 58 .... 130 0 0 -40 22 24 9 41 39.7 3 32 11 -40 21 43 -40 23 4 -40 17 26 -40 27 22 0.37 131 0 0 -39 13 10 9 41 38.9 4 32 10 -39 12 30 -39 13 50 -39 8 14 -39 18 6 0.45 132 0 0 -38 3 24 9 41 37.7 5 31 8 -38 2 44 -38 4 4 -37 58 30 -38 8 18 0.49 133 0 0 -36 53 10 9 41 36.2 7 30 7 -36 52 31 -36 53 50 -36 48 18 -36 58 3 0.52 134 0 0 -35 42 36 9 41 34.4 8 30 6 -35 41 57 -35 43 16 -35 37 46 -35 47 27 0.54 135 0 0 -34 31 47 9 41 32.1 10 29 5 -34 31 8 -34 32 27 -34 27 0 -34 36 36 0.55 136 0 0 -33 20 50 9 41 29.5 11 28 4 -33 20 11 -33 21 29 -33 16 5 -33 25 36 0.56 137 0 0 -32 9 50 9 41 26.5 13 28 2 -32 9 11 -32 10 28 -32 5 7 -32 14 33 0.56 138 0 0 -30 58 52 9 41 23.2 14 27 1 -30 58 14 -30 59 30 -30 54 12 -31 3 33 0.57 139 0 0 -29 48 3 9 41 19.4 15 27 0 -29 47 25 -29 48 41 -29 43 25 -29 52 41 0.57 140 0 0 -28 37 27 9 41 15.4 17 26 -2 -28 36 50 -28 38 5 -28 32 53 -28 42 3 0.58 141 0 0 -27 27 11 9 41 10.9 18 26 -3 -27 26 34 -27 27 48 -27 22 39 -27 31 43 0.58 142 0 0 -26 17 18 9 41 6.1 20 25 -4 -26 16 41 -26 17 54 -26 12 48 -26 21 47 0.58 143 0 0 -25 7 53 9 41 1.0 21 25 -6 -25 7 16 -25 8 29 -25 3 26 -25 12 19 0.59 144 0 0 -23 59 0 9 40 55.5 23 24 -7 -23 58 24 -23 59 36 -23 54 36 -24 3 24 0.59 145 0 0 -22 50 44 9 40 49.7 24 24 -8 -22 50 8 -22 51 19 -22 46 23 -22 55 5 0.59 146 0 0 -21 43 8 9 40 43.6 25 23 -10 -21 42 33 -21 43 43 -21 38 50 -21 47 26 0.59 147 0 0 -20 36 16 9 40 37.2 27 22 -11 -20 35 41 -20 36 50 -20 32 1 -20 40 31 0.59 148 0 0 -19 30 10 9 40 30.6 28 22 -12 -19 29 36 -19 30 45 -19 25 58 -19 34 23 0.59 149 0 0 -18 24 55 9 40 23.6 29 21 -14 -18 24 21 -18 25 29 -18 20 45 -18 29 4 0.59 150 0 0 -17 20 32 9 40 16.4 31 21 -15 -17 19 58 -17 21 5 -17 16 25 -17 24 38 0.59 151 0 0 -16 17 3 9 40 9.0 32 20 -16 -16 16 30 -16 17 36 -16 12 59 -16 21 7 0.59 152 0 0 -15 14 32 9 40 1.3 33 20 -18 -15 13 59 -15 15 4 -15 10 31 -15 18 33 0.59 153 0 0 -14 12 59 9 39 53.4 35 19 -19 -14 12 27 -14 13 31 -14 9 1 -14 16 58 0.60 154 0 0 -13 12 27 9 39 45.4 36 18 -20 -13 11 55 -13 12 59 -13 8 31 -13 16 23 0.60 155 0 0 -12 12 56 9 39 37.1 37 18 -22 -12 12 25 -12 13 28 -12 9 3 -12 16 50 0.60 156 0 0 -11 14 29 9 39 28.7 38 17 -23 -11 13 58 -11 15 1 -11 10 39 -11 18 20 0.60 157 0 0 -10 17 6 9 39 20.1 39 16 -24 -10 16 35 -10 17 37 -10 13 18 -10 20 55 0.60 158 0 0 - 9 20 49 9 39 11.4 41 16 -25 - 9 20 18 - 9 21 19 - 9 17 3 - 9 24 35 0.60 159 0 0 - 8 25 37 9 39 2.5 42 15 -27 - 8 25 7 - 8 26 8 - 8 21 54 - 8 29 21 0.60 160 0 0 - 7 31 32 9 38 53.5 43 14 -28 - 7 31 2 - 7 32 2 - 7 27 51 - 7 35 13 0.60 161 0 0 - 6 38 34 9 38 44.4 44 13 -29 - 6 38 4 - 6 39 4 - 6 34 56 - 6 42 13 0.60 162 0 0 - 5 46 43 9 38 35.3 45 12 -31 - 5 46 14 - 5 47 13 - 5 43 7 - 5 50 20 0.59 163 0 0 - 4 56 0 9 38 26.0 46 12 -32 - 4 55 31 - 4 56 29 - 4 52 26 - 4 59 35 0.59 164 0 0 - 4 6 25 9 38 16.7 47 11 -33 - 4 5 56 - 4 6 54 - 4 2 53 - 4 9 57 0.59 165 0 0 - 3 17 57 9 38 7.3 48 10 -34 - 3 17 28 - 3 18 25 - 3 14 27 - 3 21 27 0.59 166 0 0 - 2 30 37 9 37 57.8 49 9 -36 - 2 30 9 - 2 31 5 - 2 27 9 - 2 34 5 0.59 167 0 0 - 1 44 24 9 37 48.3 50 8 -37 - 1 43 56 - 1 44 52 - 1 40 58 - 1 47 50 0.59 168 0 0 - 0 59 18 9 37 38.8 51 7 -38 - 0 58 51 - 0 59 46 - 0 55 54 - 1 2 43 0.59 169 0 0 - 0 15 20 9 37 29.2 51 6 -39 - 0 14 52 - 0 15 47 - 0 11 58 - 0 18 42 0.59 170 0 0 0 27 32 9 37 19.6 52 4 -40 0 27 59 0 27 5 0 30 52 0 24 12 0.59 171 0 0 1 9 18 9 37 10.0 53 3 -42 1 9 45 1 8 51 1 12 36 1 5 59 0.59 172 0 0 1 49 58 9 37 0.4 54 2 -43 1 50 25 1 49 31 1 53 15 1 46 41 0.59 173 0 0 2 29 33 9 36 50.8 54 1 -44 2 29 59 2 29 6 2 32 48 2 26 17 0.59 174 0 0 3 8 2 9 36 41.3 55 360 -45 3 8 29 3 7 36 3 11 16 3 4 49 0.59 175 0 0 3 45 28 9 36 31.7 56 358 -46 3 45 54 3 45 2 3 48 40 3 42 16 0.59 176 0 0 4 21 50 9 36 22.1 56 357 -47 4 22 16 4 21 24 4 25 0 4 18 39 0.59 177 0 0 4 57 9 9 36 12.6 57 355 -48 4 57 34 4 56 43 5 0 18 4 53 59 0.59 178 0 0 5 31 25 9 36 3.1 57 354 -50 5 31 50 5 30 59 5 34 32 5 28 17 0.59 179 0 0 6 4 39 9 35 53.6 58 352 -51 6 5 4 6 4 14 6 7 45 6 1 33 0.59 180 0 0 6 36 52 9 35 44.1 58 351 -52 6 37 17 6 36 27 6 39 57 6 33 47 0.59 -179 0 0 7 8 4 9 35 34.7 58 349 -53 7 8 29 7 7 39 7 11 8 7 5 0 0.59 -178 0 0 7 38 16 9 35 25.4 59 348 -54 7 38 41 7 37 51 7 41 18 7 35 13 0.59 -177 0 0 8 7 28 9 35 16.0 59 346 -55 8 7 53 8 7 4 8 10 30 8 4 27 0.59 -176 0 0 8 35 42 9 35 6.8 59 345 -56 8 36 6 8 35 17 8 38 42 8 32 42 0.59 -175 0 0 9 2 57 9 34 57.5 59 343 -57 9 3 21 9 2 33 9 5 56 8 59 58 0.59 -174 0 0 9 29 15 9 34 48.4 59 341 -58 9 29 39 9 28 50 9 32 13 9 26 16 0.59 -173 0 0 9 54 35 9 34 39.3 60 340 -59 9 54 59 9 54 11 9 57 32 9 51 38 0.59 -172 0 0 10 18 59 9 34 30.2 60 338 -60 10 19 23 10 18 35 10 21 55 10 16 3 0.59 -171 0 0 10 42 27 9 34 21.2 60 337 -61 10 42 51 10 42 3 10 45 22 10 39 32 0.59 -170 0 0 11 4 59 9 34 12.3 59 335 -62 11 5 23 11 4 36 11 7 53 11 2 5 0.59 -169 0 0 11 26 37 9 34 3.4 59 334 -63 11 27 0 11 26 13 11 29 30 11 23 43 0.59 -168 0 0 11 47 20 9 33 54.6 59 332 -64 11 47 44 11 46 57 11 50 13 11 44 28 0.59 -167 0 0 12 7 10 9 33 45.8 59 331 -65 12 7 33 12 6 46 12 10 1 12 4 18 0.59 -166 0 0 12 26 6 9 33 37.1 59 329 -66 12 26 29 12 25 42 12 28 56 12 23 15 0.59 -165 0 0 12 44 9 9 33 28.5 59 328 -67 12 44 32 12 43 46 12 46 59 12 41 18 0.59 -164 0 0 13 1 20 9 33 20.0 58 327 -68 13 1 43 13 0 57 13 4 9 12 58 30 0.59 -163 0 0 13 17 38 9 33 11.5 58 325 -69 13 18 1 13 17 15 13 20 27 13 14 49 0.59 -162 0 0 13 33 6 9 33 3.1 58 324 -70 13 33 28 13 32 43 13 35 54 13 30 17 0.59 -161 0 0 13 47 42 9 32 54.7 57 323 -71 13 48 4 13 47 19 13 50 29 13 44 54 0.59 -160 0 0 14 1 27 9 32 46.5 57 322 -72 14 1 50 14 1 4 14 4 14 13 58 40 0.59 -159 0 0 14 14 22 9 32 38.3 57 321 -73 14 14 44 14 13 59 14 17 8 14 11 35 0.59 -158 0 0 14 26 27 9 32 30.1 56 320 -73 14 26 49 14 26 4 14 29 13 14 23 40 0.59 -157 0 0 14 37 42 9 32 22.1 56 319 -74 14 38 4 14 37 19 14 40 27 14 34 56 0.59 -156 0 0 14 48 7 9 32 14.1 55 318 -75 14 48 30 14 47 45 14 50 52 14 45 22 0.59 -155 0 0 14 57 43 9 32 6.2 55 317 -76 14 58 6 14 57 21 15 0 28 14 54 58 0.59 -154 0 0 15 6 31 9 31 58.3 54 316 -77 15 6 53 15 6 8 15 9 15 15 3 46 0.59 -153 0 0 15 14 29 9 31 50.5 54 315 -78 15 14 52 15 14 7 15 17 14 15 11 45 0.59 -152 0 0 15 21 39 9 31 42.8 53 314 -78 15 22 1 15 21 17 15 24 23 15 18 55 0.59 -151 0 0 15 28 1 9 31 35.2 52 314 -79 15 28 23 15 27 38 15 30 45 15 25 17 0.59 -150 0 0 15 33 34 9 31 27.7 52 313 -80 15 33 56 15 33 12 15 36 18 15 30 50 0.59 -149 0 0 15 38 19 9 31 20.2 51 312 -80 15 38 41 15 37 57 15 41 3 15 35 36 0.59 -148 0 0 15 42 16 9 31 12.8 50 312 -81 15 42 39 15 41 54 15 45 0 15 39 33 0.59 -147 0 0 15 45 26 9 31 5.5 50 311 -81 15 45 48 15 45 3 15 48 9 15 42 42 0.59 -146 0 0 15 47 47 9 30 58.2 49 311 -82 15 48 9 15 47 25 15 50 30 15 45 4 0.59 -145 0 0 15 49 20 9 30 51.1 48 310 -82 15 49 43 15 48 58 15 52 3 15 46 37 0.59 -144 0 0 15 50 6 9 30 44.0 48 310 -82 15 50 28 15 49 44 15 52 49 15 47 23 0.59 -143 0 0 15 50 4 9 30 37.0 47 310 -82 15 50 26 15 49 41 15 52 47 15 47 20 0.59 -142 0 0 15 49 13 9 30 30.0 46 309 -82 15 49 36 15 48 51 15 51 57 15 46 30 0.59 -141 0 0 15 47 35 9 30 23.2 46 309 -82 15 47 57 15 47 13 15 50 18 15 44 52 0.59 -140 0 0 15 45 9 9 30 16.4 45 309 -82 15 45 31 15 44 47 15 47 52 15 42 25 0.59 -139 0 0 15 41 54 9 30 9.7 44 308 -81 15 42 16 15 41 32 15 44 38 15 39 10 0.59 -138 0 0 15 37 51 9 30 3.1 43 308 -81 15 38 13 15 37 29 15 40 35 15 35 7 0.59 -137 0 0 15 32 59 9 29 56.5 42 308 -80 15 33 22 15 32 37 15 35 43 15 30 15 0.59 -136 0 0 15 27 19 9 29 50.1 42 308 -80 15 27 41 15 26 57 15 30 3 15 24 35 0.59 -135 0 0 15 20 50 9 29 43.7 41 308 -79 15 21 12 15 20 27 15 23 34 15 18 5 0.59 -134 0 0 15 13 31 9 29 37.5 40 307 -78 15 13 53 15 13 9 15 16 16 15 10 46 0.60 -133 0 0 15 5 23 9 29 31.3 39 307 -78 15 5 45 15 5 0 15 8 8 15 2 37 0.60 -132 0 0 14 56 25 9 29 25.2 38 307 -77 14 56 47 14 56 2 14 59 10 14 53 39 0.60 -131 0 0 14 46 36 9 29 19.2 38 307 -76 14 46 59 14 46 14 14 49 22 14 43 50 0.60 -130 0 0 14 35 58 9 29 13.3 37 307 -75 14 36 20 14 35 35 14 38 44 14 33 11 0.60 -129 0 0 14 24 28 9 29 7.5 36 307 -74 14 24 50 14 24 5 14 27 15 14 21 41 0.60 -128 0 0 14 12 7 9 29 1.7 35 307 -73 14 12 29 14 11 44 14 14 54 14 9 19 0.60 -127 0 0 13 58 54 9 28 56.1 34 307 -72 13 59 16 13 58 31 14 1 42 13 56 6 0.60 -126 0 0 13 44 48 9 28 50.6 33 307 -72 13 45 11 13 44 25 13 47 37 13 42 0 0.60 -125 0 0 13 29 50 9 28 45.2 32 307 -71 13 30 13 13 29 27 13 32 40 13 27 1 0.60 -124 0 0 13 13 59 9 28 39.9 31 307 -70 13 14 22 13 13 36 13 16 49 13 11 9 0.60 -123 0 0 12 57 14 9 28 34.7 30 307 -69 12 57 37 12 56 51 13 0 5 12 54 23 0.60 -122 0 0 12 39 34 9 28 29.6 29 307 -68 12 39 58 12 39 11 12 42 26 12 36 43 0.60 -121 0 0 12 21 0 9 28 24.6 28 307 -67 12 21 23 12 20 36 12 23 52 12 18 7 0.60 -120 0 0 12 1 30 9 28 19.8 28 307 -66 12 1 53 12 1 6 12 4 23 11 58 36 0.61 -119 0 0 11 41 3 9 28 15.1 27 307 -65 11 41 27 11 40 40 11 43 57 11 38 9 0.61 -118 0 0 11 19 40 9 28 10.5 26 307 -64 11 20 3 11 19 16 11 22 35 11 16 45 0.61 -117 0 0 10 57 19 9 28 6.0 25 307 -63 10 57 42 10 56 55 11 0 14 10 54 23 0.61 -116 0 0 10 33 59 9 28 1.7 24 307 -62 10 34 23 10 33 35 10 36 56 10 31 2 0.61 -115 0 0 10 9 40 9 27 57.5 23 307 -61 10 10 5 10 9 16 10 12 38 10 6 42 0.61 -114 0 0 9 44 22 9 27 53.5 22 307 -60 9 44 46 9 43 57 9 47 21 9 41 23 0.61 -113 0 0 9 18 3 9 27 49.6 21 307 -59 9 18 27 9 17 38 9 21 3 9 15 2 0.61 -112 0 0 8 50 42 9 27 45.8 19 307 -58 8 51 6 8 50 17 8 53 43 8 47 40 0.61 -111 0 0 8 22 19 9 27 42.2 18 307 -56 8 22 44 8 21 54 8 25 21 8 19 16 0.61 -110 0 0 7 52 52 9 27 38.8 17 308 -55 7 53 17 7 52 27 7 55 56 7 49 48 0.62 -109 0 0 7 22 22 9 27 35.6 16 308 -54 7 22 47 7 21 57 7 25 28 7 19 17 0.62 -108 0 0 6 50 47 9 27 32.5 15 308 -53 6 51 12 6 50 22 6 53 54 6 47 40 0.62 -107 0 0 6 18 6 9 27 29.6 14 308 -52 6 18 32 6 17 41 6 21 15 6 14 58 0.62 -106 0 0 5 44 19 9 27 26.9 13 308 -51 5 44 45 5 43 53 5 47 29 5 41 9 0.62 -105 0 0 5 9 24 9 27 24.4 12 308 -50 5 9 50 5 8 58 5 12 35 5 6 12 0.62 -104 0 0 4 33 20 9 27 22.1 11 308 -49 4 33 47 4 32 54 4 36 33 4 30 7 0.63 -103 0 0 3 56 8 9 27 20.1 9 308 -47 3 56 34 3 55 41 3 59 23 3 52 53 0.63 -102 0 0 3 17 45 9 27 18.2 8 308 -46 3 18 12 3 17 18 3 21 2 3 14 29 0.63 -101 0 0 2 38 11 9 27 16.6 7 308 -45 2 38 38 2 37 44 2 41 30 2 34 53 0.64 -100 0 0 1 57 26 9 27 15.2 6 308 -44 1 57 53 1 56 59 2 0 46 1 54 6 0.64 - 99 0 0 1 15 28 9 27 14.0 5 308 -43 1 15 55 1 15 0 1 18 50 1 12 6 0.65 - 98 0 0 0 32 16 9 27 13.1 3 308 -41 0 32 44 0 31 49 0 35 41 0 28 52 0.67 - 97 0 0 - 0 12 9 9 27 12.5 2 308 -40 - 0 11 41 - 0 12 37 - 0 8 43 - 0 15 35 0.70 - 96 0 0 - 0 57 49 9 27 12.1 1 308 -39 - 0 57 21 - 0 58 18 - 0 54 21 - 1 1 18 0.81 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.8 Data for the target star ------------------------ * name: UCAC4 640-013057 * constellation : Perseus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 03 15 23.2756 DE: +37 57 17.636 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 03 15 23.2755 DE: +37 57 17.637 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 13.1 * B mag [mag]: 13.6 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (29075) 1950 DA asteroid class: approx. diameter [km]: 1 approx. diameter ["]: 0.001 distance from Earth [AU]: 1.39320 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#246 date of fit: 2023 Jul 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): 0.015", 0.004", 64.463° remarks: * orbital elements for (29075)1950 DA : Mean anomaly = 252.8467488292 deg Arg. of pericenter = 224.7880836245 deg Long. of node = 356.5708279407 deg Inclination = 12.1546847430 deg Eccentricity = 0.5075650200 Semimajor axis = 1.6989529366 AU Perihelion dist = 0.8366238554 AU Mag: H = 17.28, G = 0.15 Epoch of elements : MJD 60666.39891883 TDT (2024 Dec 22.3989) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#2462023Jul14,0.09,2024,12,22,9.574037,0.241261,-0.445360,-6.281007,-3.401669,0.003470,-0.000628,0.000001,0.000001 174.2064,38.0501,36.08,-23.43,False UCAC4 640-013057,3.25646546,37.9548990,13.62,13.14,12.88,0.0,0,,3.28353984,38.0501468,7.48,7.29,0,0,0 29075,1950 DA,20.62,1.175,1.3932,0,0,-3.355,-21.47,,0.2,0 0,252.6692,2024,12,22,224.7881,356.5708,12.1547,0.50757,1.69895,0.83662,17.28,5.0,0.15 4.182,0.0150,0.0037,64,0.0038,Known errors,1.51,0,-1,-1 20241222_013057,60140.75 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 18:00 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org