IOTA/IOTA-ES occultation update for (2958) Arpetito / TYC 271-00075-1 event on 2024 Dec 20, 20:13 UT Visible from Summary ------- On 2024 Dec 20 UT, the 8.95351571322225 km diameter asteroid (2958) Arpetito will occult a 9.1 mag star in the constellation Leo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 8.93 mag to 17.98 mag (the magnitude of the asteroid) for at most 0.690 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: 79 * date and approx. time of event: 2024 Dec 20, 20:06 - 2024 Dec 20, 20:21 * geocentric midpoint of event [JD]: 2460665.34304558 * magnitude of target star: 9.05 * magnitude drop [mag]: 8.93 * estimated maximum duration [s]: 0.690 * Moon: 69 % sunlit, 17° distance * Sun: 96° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 9 * 1 sigma uncertainty interval [path widths]: +/- 0.69 * 1 sigma uncertainty interval [seconds]: +/- 2.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.003", 115°) * approx speed of asteroid's shadow [km/s]: 13.2930 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 271-00075-1 by 2958 Arpetito on 2024 Dec 20 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 52 0 0 13 14 16 20 6 10.8 0 88 -78 13 11 43 13 16 48 13 8 13 13 20 17 .... 53 0 0 13 16 3 20 6 10.9 1 88 -79 13 13 30 13 18 35 13 10 0 13 22 4 0.12 54 0 0 13 17 22 20 6 11.2 2 88 -79 13 14 50 13 19 55 13 11 20 13 23 24 0.17 55 0 0 13 18 15 20 6 11.5 3 89 -79 13 15 42 13 20 47 13 12 13 13 24 17 0.18 56 0 0 13 18 40 20 6 12.1 4 89 -80 13 16 7 13 21 12 13 12 38 13 24 42 0.19 57 0 0 13 18 37 20 6 12.7 5 89 -80 13 16 5 13 21 10 13 12 35 13 24 39 0.20 58 0 0 13 18 8 20 6 13.5 6 89 -80 13 15 35 13 20 40 13 12 6 13 24 9 0.20 59 0 0 13 17 10 20 6 14.5 7 90 -80 13 14 38 13 19 43 13 11 8 13 23 12 0.21 60 0 0 13 15 45 20 6 15.6 8 90 -79 13 13 13 13 18 18 13 9 43 13 21 47 0.21 61 0 0 13 13 53 20 6 16.8 9 90 -79 13 11 20 13 16 25 13 7 51 13 19 55 0.21 62 0 0 13 11 33 20 6 18.2 10 90 -79 13 9 0 13 14 5 13 5 30 13 17 35 0.21 63 0 0 13 8 45 20 6 19.7 11 90 -79 13 6 12 13 11 18 13 2 42 13 14 47 0.21 64 0 0 13 5 29 20 6 21.4 12 91 -78 13 2 57 13 8 2 12 59 27 13 11 32 0.22 65 0 0 13 1 46 20 6 23.2 13 91 -77 12 59 13 13 4 19 12 55 43 13 7 49 0.22 66 0 0 12 57 35 20 6 25.1 14 91 -77 12 55 2 13 0 8 12 51 32 13 3 38 0.22 67 0 0 12 52 56 20 6 27.2 15 91 -76 12 50 23 12 55 29 12 46 53 12 58 59 0.22 68 0 0 12 47 49 20 6 29.5 16 92 -76 12 45 16 12 50 22 12 41 45 12 53 53 0.22 69 0 0 12 42 14 20 6 31.9 17 92 -75 12 39 41 12 44 47 12 36 10 12 48 18 0.22 70 0 0 12 36 12 20 6 34.4 18 92 -74 12 33 38 12 38 45 12 30 7 12 42 16 0.22 71 0 0 12 29 41 20 6 37.1 19 92 -73 12 27 7 12 32 14 12 23 36 12 35 45 0.22 72 0 0 12 22 42 20 6 39.9 20 92 -73 12 20 8 12 25 15 12 16 37 12 28 47 0.22 73 0 0 12 15 15 20 6 42.8 21 93 -72 12 12 41 12 17 49 12 9 10 12 21 20 0.22 74 0 0 12 7 20 20 6 46.0 22 93 -71 12 4 46 12 9 54 12 1 14 12 13 26 0.22 75 0 0 11 58 57 20 6 49.2 23 93 -70 11 56 23 12 1 31 11 52 51 12 5 3 0.22 76 0 0 11 50 6 20 6 52.6 24 93 -69 11 47 32 11 52 40 11 43 59 11 56 12 0.22 77 0 0 11 40 47 20 6 56.1 25 93 -68 11 38 12 11 43 21 11 34 39 11 46 54 0.22 78 0 0 11 30 59 20 6 59.8 26 93 -67 11 28 24 11 33 34 11 24 51 11 37 7 0.22 79 0 0 11 20 43 20 7 3.7 27 94 -66 11 18 9 11 23 18 11 14 35 11 26 51 0.22 80 0 0 11 10 0 20 7 7.6 28 94 -65 11 7 25 11 12 35 11 3 51 11 16 8 0.22 81 0 0 10 58 48 20 7 11.8 29 94 -65 10 56 12 11 1 23 10 52 39 11 4 57 0.22 82 0 0 10 47 8 20 7 16.0 30 94 -64 10 44 32 10 49 43 10 40 58 10 53 17 0.22 83 0 0 10 35 0 20 7 20.5 31 94 -63 10 32 24 10 37 35 10 28 49 10 41 10 0.23 84 0 0 10 22 23 20 7 25.0 32 94 -62 10 19 47 10 24 59 10 16 12 10 28 34 0.23 85 0 0 10 9 19 20 7 29.7 33 94 -61 10 6 43 10 11 55 10 3 8 10 15 30 0.23 86 0 0 9 55 47 20 7 34.6 34 94 -60 9 53 10 9 58 23 9 49 35 10 1 59 0.23 87 0 0 9 41 47 20 7 39.6 35 94 -59 9 39 10 9 44 23 9 35 34 9 47 59 0.23 88 0 0 9 27 18 20 7 44.7 36 94 -58 9 24 41 9 29 56 9 21 5 9 33 32 0.23 89 0 0 9 12 22 20 7 50.0 37 94 -57 9 9 45 9 15 0 9 6 8 9 18 37 0.23 90 0 0 8 56 59 20 7 55.4 38 94 -56 8 54 21 8 59 36 8 50 44 9 3 13 0.23 91 0 0 8 41 7 20 8 1.0 39 94 -55 8 38 29 8 43 45 8 34 52 8 47 23 0.23 92 0 0 8 24 48 20 8 6.7 40 94 -54 8 22 10 8 27 27 8 18 32 8 31 5 0.23 93 0 0 8 8 2 20 8 12.6 41 94 -53 8 5 23 8 10 41 8 1 45 8 14 19 0.23 94 0 0 7 50 48 20 8 18.6 42 94 -52 7 48 9 7 53 27 7 44 30 7 57 6 0.23 95 0 0 7 33 7 20 8 24.7 43 94 -51 7 30 28 7 35 47 7 26 49 7 39 26 0.23 96 0 0 7 14 59 20 8 31.0 44 94 -50 7 12 20 7 17 39 7 8 40 7 21 19 0.23 97 0 0 6 56 25 20 8 37.4 45 94 -49 6 53 45 6 59 5 6 50 4 7 2 45 0.23 98 0 0 6 37 23 20 8 44.0 46 94 -47 6 34 43 6 40 3 6 31 2 6 43 44 0.23 99 0 0 6 17 55 20 8 50.7 47 94 -46 6 15 15 6 20 36 6 11 34 6 24 17 0.23 100 0 0 5 58 1 20 8 57.5 48 94 -45 5 55 20 6 0 42 5 51 39 6 4 24 0.23 101 0 0 5 37 41 20 9 4.4 49 93 -44 5 35 0 5 40 22 5 31 18 5 44 4 0.23 102 0 0 5 16 55 20 9 11.5 50 93 -43 5 14 14 5 19 37 5 10 31 5 23 19 0.23 103 0 0 4 55 44 20 9 18.7 51 93 -42 4 53 2 4 58 26 4 49 19 5 2 9 0.23 104 0 0 4 34 7 20 9 26.1 53 93 -41 4 31 25 4 36 50 4 27 42 4 40 33 0.23 105 0 0 4 12 6 20 9 33.6 54 92 -40 4 9 23 4 14 49 4 5 39 4 18 33 0.23 106 0 0 3 49 40 20 9 41.2 55 92 -39 3 46 57 3 52 23 3 43 13 3 56 7 0.23 107 0 0 3 26 50 20 9 48.9 56 91 -38 3 24 7 3 29 33 3 20 22 3 33 18 0.23 108 0 0 3 3 36 20 9 56.7 57 91 -37 3 0 53 3 6 20 2 57 7 3 10 5 0.23 109 0 0 2 39 59 20 10 4.7 58 90 -36 2 37 15 2 42 43 2 33 29 2 46 29 0.23 110 0 0 2 15 59 20 10 12.7 59 90 -35 2 13 15 2 18 43 2 9 28 2 22 30 0.23 111 0 0 1 51 36 20 10 20.9 60 89 -33 1 48 52 1 54 21 1 45 5 1 58 8 0.23 112 0 0 1 26 52 20 10 29.2 61 89 -32 1 24 7 1 29 37 1 20 19 1 33 24 0.23 113 0 0 1 1 46 20 10 37.6 62 88 -31 0 59 0 1 4 31 0 55 12 1 8 19 0.23 114 0 0 0 36 19 20 10 46.1 63 87 -30 0 33 33 0 39 4 0 29 45 0 42 52 0.23 115 0 0 0 10 31 20 10 54.6 64 86 -29 0 7 45 0 13 17 0 3 56 0 17 6 0.23 116 0 0 - 0 15 37 20 11 3.3 65 85 -28 - 0 18 23 - 0 12 50 - 0 22 12 - 0 9 1 0.23 117 0 0 - 0 42 3 20 11 12.1 66 84 -27 - 0 44 50 - 0 39 17 - 0 48 40 - 0 35 27 0.23 118 0 0 - 1 8 49 20 11 20.9 67 82 -26 - 1 11 36 - 1 6 2 - 1 15 26 - 1 2 12 0.23 119 0 0 - 1 35 52 20 11 29.9 68 81 -24 - 1 38 40 - 1 33 5 - 1 42 30 - 1 29 15 0.23 120 0 0 - 2 3 13 20 11 38.9 69 79 -23 - 2 6 1 - 2 0 25 - 2 9 52 - 1 56 35 0.23 121 0 0 - 2 30 51 20 11 48.0 70 77 -22 - 2 33 39 - 2 28 3 - 2 37 30 - 2 24 12 0.22 122 0 0 - 2 58 44 20 11 57.1 71 76 -21 - 3 1 32 - 2 55 56 - 3 5 24 - 2 52 4 0.22 123 0 0 - 3 26 53 20 12 6.3 71 73 -20 - 3 29 41 - 3 24 4 - 3 33 33 - 3 20 13 0.22 124 0 0 - 3 55 16 20 12 15.6 72 71 -19 - 3 58 5 - 3 52 27 - 4 1 57 - 3 48 35 0.22 125 0 0 - 4 23 53 20 12 24.9 73 68 -18 - 4 26 42 - 4 21 4 - 4 30 35 - 4 17 11 0.22 126 0 0 - 4 52 43 20 12 34.3 74 65 -17 - 4 55 32 - 4 49 54 - 4 59 25 - 4 46 1 0.22 127 0 0 - 5 21 45 20 12 43.7 75 62 -15 - 5 24 34 - 5 18 55 - 5 28 27 - 5 15 2 0.22 128 0 0 - 5 50 58 20 12 53.2 75 59 -14 - 5 53 47 - 5 48 8 - 5 57 41 - 5 44 15 0.22 129 0 0 - 6 20 21 20 13 2.7 76 55 -13 - 6 23 11 - 6 17 31 - 6 27 5 - 6 13 38 0.22 130 0 0 - 6 49 54 20 13 12.2 76 51 -12 - 6 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19 48.2 41 302 40 -29 16 55 -29 11 29 -29 20 40 -29 7 44 0.21 180 0 0 -29 34 42 20 19 53.4 40 301 41 -29 37 25 -29 31 59 -29 41 9 -29 28 15 0.21 -179 0 0 -29 54 49 20 19 58.6 39 301 42 -29 57 31 -29 52 6 -30 1 15 -29 48 23 0.21 -178 0 0 -30 14 32 20 20 3.6 38 300 43 -30 17 14 -30 11 50 -30 20 57 -30 8 6 0.21 -177 0 0 -30 33 51 20 20 8.5 37 299 44 -30 36 33 -30 31 9 -30 40 16 -30 27 27 0.21 -176 0 0 -30 52 46 20 20 13.2 36 299 45 -30 55 28 -30 50 5 -30 59 10 -30 46 23 0.21 -175 0 0 -31 11 18 20 20 17.8 35 298 46 -31 13 59 -31 8 37 -31 17 41 -31 4 55 0.21 -174 0 0 -31 29 25 20 20 22.3 34 297 47 -31 32 6 -31 26 45 -31 35 48 -31 23 3 0.21 -173 0 0 -31 47 9 20 20 26.6 33 297 47 -31 49 49 -31 44 28 -31 53 30 -31 40 48 0.21 -172 0 0 -32 4 28 20 20 30.9 32 296 48 -32 7 8 -32 1 48 -32 10 49 -31 58 8 0.21 -171 0 0 -32 21 24 20 20 35.0 31 296 49 -32 24 3 -32 18 44 -32 27 43 -32 15 4 0.21 -170 0 0 -32 37 55 20 20 38.9 31 295 50 -32 40 34 -32 35 15 -32 44 14 -32 31 36 0.21 -169 0 0 -32 54 2 20 20 42.8 30 294 51 -32 56 41 -32 51 23 -33 0 20 -32 47 44 0.21 -168 0 0 -33 9 45 20 20 46.5 29 294 52 -33 12 23 -33 7 6 -33 16 2 -33 3 27 0.21 -167 0 0 -33 25 3 20 20 50.1 28 293 53 -33 27 42 -33 22 25 -33 31 20 -33 18 47 0.21 -166 0 0 -33 39 58 20 20 53.6 27 293 53 -33 42 36 -33 37 20 -33 46 14 -33 33 42 0.21 -165 0 0 -33 54 29 20 20 57.0 26 292 54 -33 57 7 -33 51 51 -34 0 44 -33 48 13 0.21 -164 0 0 -34 8 35 20 21 0.2 25 291 55 -34 11 13 -34 5 58 -34 14 50 -34 2 21 0.21 -163 0 0 -34 22 18 20 21 3.3 24 291 56 -34 24 55 -34 19 40 -34 28 32 -34 16 4 0.21 -162 0 0 -34 35 36 20 21 6.3 24 290 57 -34 38 13 -34 32 59 -34 41 49 -34 29 23 0.21 -161 0 0 -34 48 31 20 21 9.2 23 290 57 -34 51 8 -34 45 54 -34 54 43 -34 42 18 0.21 -160 0 0 -35 1 2 20 21 12.0 22 289 58 -35 3 38 -34 58 25 -35 7 14 -34 54 50 0.21 -159 0 0 -35 13 9 20 21 14.7 21 288 59 -35 15 45 -35 10 32 -35 19 20 -35 6 58 0.21 -158 0 0 -35 24 52 20 21 17.2 20 288 60 -35 27 28 -35 22 16 -35 31 3 -35 18 41 0.21 -157 0 0 -35 36 11 20 21 19.7 19 287 60 -35 38 47 -35 33 36 -35 42 21 -35 30 2 0.22 -156 0 0 -35 47 7 20 21 22.0 18 286 61 -35 49 43 -35 44 32 -35 53 17 -35 40 58 0.22 -155 0 0 -35 57 40 20 21 24.2 18 286 62 -36 0 15 -35 55 5 -36 3 49 -35 51 31 0.22 -154 0 0 -36 7 49 20 21 26.3 17 285 63 -36 10 24 -36 5 14 -36 13 57 -36 1 41 0.22 -153 0 0 -36 17 34 20 21 28.3 16 285 63 -36 20 9 -36 15 0 -36 23 42 -36 11 27 0.22 -152 0 0 -36 26 57 20 21 30.2 15 284 64 -36 29 31 -36 24 22 -36 33 4 -36 20 49 0.22 -151 0 0 -36 35 55 20 21 32.0 14 283 65 -36 38 30 -36 33 21 -36 42 2 -36 29 49 0.22 -150 0 0 -36 44 31 20 21 33.7 13 283 65 -36 47 5 -36 41 57 -36 50 38 -36 38 25 0.22 -149 0 0 -36 52 44 20 21 35.3 13 282 66 -36 55 18 -36 50 10 -36 58 50 -36 46 38 0.22 -148 0 0 -37 0 34 20 21 36.8 12 282 67 -37 3 7 -36 58 0 -37 6 39 -36 54 28 0.22 -147 0 0 -37 8 0 20 21 38.2 11 281 67 -37 10 34 -37 5 27 -37 14 5 -37 1 55 0.22 -146 0 0 -37 15 4 20 21 39.4 10 280 68 -37 17 38 -37 12 31 -37 21 9 -37 9 0 0.22 -145 0 0 -37 21 45 20 21 40.6 9 280 68 -37 24 18 -37 19 12 -37 27 49 -37 15 41 0.22 -144 0 0 -37 28 3 20 21 41.7 9 279 69 -37 30 37 -37 25 30 -37 34 7 -37 22 0 0.22 -143 0 0 -37 33 59 20 21 42.7 8 279 70 -37 36 32 -37 31 26 -37 40 3 -37 27 56 0.22 -142 0 0 -37 39 32 20 21 43.6 7 278 70 -37 42 5 -37 36 59 -37 45 35 -37 33 29 0.22 -141 0 0 -37 44 42 20 21 44.3 6 277 71 -37 47 15 -37 42 10 -37 50 45 -37 38 40 0.23 -140 0 0 -37 49 30 20 21 45.0 5 277 71 -37 52 3 -37 46 58 -37 55 33 -37 43 28 0.23 -139 0 0 -37 53 56 20 21 45.6 5 276 72 -37 56 28 -37 51 23 -37 59 58 -37 47 54 0.23 -138 0 0 -37 57 59 20 21 46.1 4 275 72 -38 0 32 -37 55 27 -38 4 1 -37 51 57 0.23 -137 0 0 -38 1 40 20 21 46.5 3 275 73 -38 4 12 -37 59 8 -38 7 42 -37 55 38 0.24 -136 0 0 -38 4 59 20 21 46.8 2 274 73 -38 7 31 -38 2 26 -38 11 0 -37 58 57 0.25 -135 0 0 -38 7 55 20 21 47.1 1 274 73 -38 10 27 -38 5 23 -38 13 57 -38 1 54 0.26 -134 0 0 -38 10 29 20 21 47.2 1 273 74 -38 13 1 -38 7 57 -38 16 31 -38 4 28 0.32 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 271-00075-1 * constellation : Leo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 11 33 39.1213 DE: +02 07 11.672 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 11 33 39.1214 DE: +02 07 11.671 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 9.1 * B mag [mag]: 9.6 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2958) Arpetito asteroid class: approx. diameter [km]: 9 approx. diameter ["]: 0.005 distance from Earth [AU]: 2.61260 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 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): 0.015", 0.003", 115.173° remarks: * orbital elements for (2958)Arpetito : Mean anomaly = 254.1309148232 deg Arg. of pericenter = 324.2129795331 deg Long. of node = 296.8094365672 deg Inclination = 1.0191592112 deg Eccentricity = 0.0168799184 Semimajor axis = 2.8720908184 AU Perihelion dist = 2.8236101598 AU Mag: H = 12.60, G = 0.15 Epoch of elements : MJD 60664.84304579 TDT (2024 Dec 20.8430) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr27,0.69,2024,12,20,20.233094,-0.093221,-0.194130,6.766806,-3.241096,-0.005451,0.002353,0.000000,0.000000 140.3350,1.9819,-124.00,-23.44,False TYC 271-00075-1,11.56086700,2.1199089,9.64,9.05,8.73,0.1,0,,11.58227147,1.9818963,8.93,8.80,0,0,0 2958,Arpetito,17.98,9.143,2.6126,0,0,1.520,-10.91,,0.8,0 0,253.9602,2024,12,20,324.2130,296.8094,1.0192,0.01688,2.87209,2.82361,12.60,5.0,0.15 1.688,0.0147,0.0033,115,0.0033,Known errors,1.12,0,-1,-1 20241220_0075-1,60140.75 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:56 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org