IOTA/IOTA-ES occultation update for (1123) Shapleya / TYC 6939-00550-1 event on 2024 Oct 26, 18:33 UT Visible from Summary ------- On 2024 Oct 26 UT, the 11.3807968278942 km diameter asteroid (1123) Shapleya will occult a 8.8 mag star in the constellation Capricornus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.50 mag to 15.31 mag (the magnitude of the asteroid) for at most 0.970 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: 95 * date and approx. time of event: 2024 Oct 26, 18:26 - 2024 Oct 26, 18:41 * geocentric midpoint of event [JD]: 2460610.27358546 * magnitude of target star: 8.81 * magnitude drop [mag]: 6.50 * estimated maximum duration [s]: 0.970 * Moon: 27 % sunlit, 165° distance * Sun: 103° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 14 * 1 sigma uncertainty interval [path widths]: +/- 0.45 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.001", 78°) * approx speed of asteroid's shadow [km/s]: 11.7995 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6939-00550-1 by 1123 Shapleya on 2024 Oct 26 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 - 78 0 0 3 3 30 18 26 31.1 0 114 62 2 59 25 3 7 35 2 55 46 3 11 14 .... - 77 0 0 2 37 33 18 26 31.2 1 114 62 2 33 29 2 41 37 2 29 52 2 45 15 -0.27 - 76 0 0 2 12 26 18 26 31.6 2 114 61 2 8 24 2 16 29 2 4 47 2 20 6 -0.45 - 75 0 0 1 48 10 18 26 32.3 3 114 61 1 44 8 1 52 12 1 40 33 1 55 48 -0.52 - 74 0 0 1 24 44 18 26 33.1 5 114 60 1 20 43 1 28 45 1 17 9 1 32 20 -0.56 - 73 0 0 1 2 8 18 26 34.2 6 114 59 0 58 8 1 6 7 0 54 35 1 9 41 -0.58 - 72 0 0 0 40 22 18 26 35.5 7 114 59 0 36 23 0 44 20 0 32 50 0 47 53 -0.60 - 71 0 0 0 19 26 18 26 37.0 8 114 58 0 15 28 0 23 24 0 11 56 0 26 56 -0.61 - 70 0 0 - 0 0 40 18 26 38.8 9 114 57 - 0 4 37 0 3 17 - 0 8 8 0 6 48 -0.62 - 69 0 0 - 0 19 56 18 26 40.7 10 114 56 - 0 23 52 - 0 16 0 - 0 27 22 - 0 12 29 -0.62 - 68 0 0 - 0 38 21 18 26 42.9 11 114 55 - 0 42 16 - 0 34 26 - 0 45 46 - 0 30 56 -0.63 - 67 0 0 - 0 55 57 18 26 45.2 12 114 55 - 0 59 51 - 0 52 3 - 1 3 20 - 0 48 34 -0.63 - 66 0 0 - 1 12 43 18 26 47.8 13 114 54 - 1 16 36 - 1 8 49 - 1 20 4 - 1 5 21 -0.64 - 65 0 0 - 1 28 39 18 26 50.6 14 114 53 - 1 32 31 - 1 24 46 - 1 35 59 - 1 21 18 -0.64 - 64 0 0 - 1 43 45 18 26 53.6 15 114 52 - 1 47 37 - 1 39 53 - 1 51 4 - 1 36 25 -0.65 - 63 0 0 - 1 58 1 18 26 56.8 16 114 51 - 2 1 53 - 1 54 10 - 2 5 19 - 1 50 43 -0.65 - 62 0 0 - 2 11 28 18 27 0.2 17 114 50 - 2 15 19 - 2 7 37 - 2 18 44 - 2 4 11 -0.65 - 61 0 0 - 2 24 5 18 27 3.7 18 114 49 - 2 27 55 - 2 20 14 - 2 31 20 - 2 16 49 -0.65 - 60 0 0 - 2 35 52 18 27 7.5 19 114 48 - 2 39 42 - 2 32 2 - 2 43 6 - 2 28 37 -0.66 - 59 0 0 - 2 46 50 18 27 11.4 20 114 47 - 2 50 39 - 2 43 0 - 2 54 3 - 2 39 36 -0.66 - 58 0 0 - 2 56 58 18 27 15.6 21 114 47 - 3 0 47 - 2 53 9 - 3 4 11 - 2 49 45 -0.66 - 57 0 0 - 3 6 17 18 27 19.9 22 114 46 - 3 10 5 - 3 2 28 - 3 13 29 - 2 59 4 -0.66 - 56 0 0 - 3 14 46 18 27 24.4 23 114 45 - 3 18 34 - 3 10 58 - 3 21 57 - 3 7 34 -0.66 - 55 0 0 - 3 22 26 18 27 29.1 24 114 44 - 3 26 13 - 3 18 38 - 3 29 36 - 3 15 15 -0.66 - 54 0 0 - 3 29 16 18 27 33.9 25 115 43 - 3 33 3 - 3 25 28 - 3 36 26 - 3 22 5 -0.67 - 53 0 0 - 3 35 17 18 27 39.0 26 115 42 - 3 39 4 - 3 31 30 - 3 42 26 - 3 28 7 -0.67 - 52 0 0 - 3 40 28 18 27 44.2 27 115 41 - 3 44 15 - 3 36 41 - 3 47 37 - 3 33 18 -0.67 - 51 0 0 - 3 44 50 18 27 49.6 28 115 40 - 3 48 37 - 3 41 3 - 3 51 59 - 3 37 41 -0.67 - 50 0 0 - 3 48 22 18 27 55.1 29 115 39 - 3 52 9 - 3 44 35 - 3 55 31 - 3 41 13 -0.67 - 49 0 0 - 3 51 5 18 28 0.8 30 115 38 - 3 54 51 - 3 47 18 - 3 58 13 - 3 43 56 -0.67 - 48 0 0 - 3 52 58 18 28 6.7 31 115 37 - 3 56 44 - 3 49 11 - 4 0 6 - 3 45 49 -0.67 - 47 0 0 - 3 54 1 18 28 12.8 32 116 36 - 3 57 48 - 3 50 14 - 4 1 9 - 3 46 52 -0.68 - 46 0 0 - 3 54 15 18 28 19.0 33 116 35 - 3 58 1 - 3 50 28 - 4 1 23 - 3 47 6 -0.68 - 45 0 0 - 3 53 38 18 28 25.4 33 116 34 - 3 57 25 - 3 49 51 - 4 0 47 - 3 46 29 -0.68 - 44 0 0 - 3 52 12 18 28 31.9 34 116 33 - 3 55 59 - 3 48 25 - 3 59 21 - 3 45 2 -0.68 - 43 0 0 - 3 49 55 18 28 38.6 35 116 32 - 3 53 42 - 3 46 8 - 3 57 4 - 3 42 45 -0.68 - 42 0 0 - 3 46 48 18 28 45.5 36 117 31 - 3 50 36 - 3 43 1 - 3 53 58 - 3 39 38 -0.68 - 41 0 0 - 3 42 51 18 28 52.5 37 117 30 - 3 46 39 - 3 39 4 - 3 50 1 - 3 35 41 -0.68 - 40 0 0 - 3 38 3 18 28 59.7 38 117 29 - 3 41 51 - 3 34 16 - 3 45 14 - 3 30 52 -0.68 - 39 0 0 - 3 32 25 18 29 7.0 39 118 28 - 3 36 13 - 3 28 37 - 3 39 36 - 3 25 13 -0.68 - 38 0 0 - 3 25 55 18 29 14.5 40 118 27 - 3 29 44 - 3 22 7 - 3 33 7 - 3 18 43 -0.68 - 37 0 0 - 3 18 35 18 29 22.2 41 119 26 - 3 22 23 - 3 14 46 - 3 25 47 - 3 11 21 -0.68 - 36 0 0 - 3 10 23 18 29 29.9 41 119 25 - 3 14 12 - 3 6 33 - 3 17 36 - 3 3 8 -0.68 - 35 0 0 - 3 1 19 18 29 37.9 42 120 24 - 3 5 9 - 2 57 29 - 3 8 33 - 2 54 4 -0.68 - 34 0 0 - 2 51 24 18 29 46.0 43 120 23 - 2 55 14 - 2 47 33 - 2 58 39 - 2 44 7 -0.68 - 33 0 0 - 2 40 36 18 29 54.2 44 121 22 - 2 44 27 - 2 36 45 - 2 47 53 - 2 33 19 -0.69 - 32 0 0 - 2 28 56 18 30 2.6 45 121 20 - 2 32 48 - 2 25 5 - 2 36 14 - 2 21 38 -0.69 - 31 0 0 - 2 16 24 18 30 11.1 45 122 19 - 2 20 17 - 2 12 32 - 2 23 44 - 2 9 4 -0.69 - 30 0 0 - 2 2 59 18 30 19.8 46 123 18 - 2 6 52 - 1 59 6 - 2 10 20 - 1 55 38 -0.69 - 29 0 0 - 1 48 41 18 30 28.6 47 124 17 - 1 52 35 - 1 44 47 - 1 56 3 - 1 41 18 -0.69 - 28 0 0 - 1 33 30 18 30 37.6 48 124 16 - 1 37 24 - 1 29 35 - 1 40 53 - 1 26 5 -0.69 - 27 0 0 - 1 17 25 18 30 46.6 48 125 15 - 1 21 20 - 1 13 29 - 1 24 50 - 1 9 59 -0.69 - 26 0 0 - 1 0 26 18 30 55.9 49 126 14 - 1 4 22 - 0 56 29 - 1 7 53 - 0 52 58 -0.69 - 25 0 0 - 0 42 32 18 31 5.2 50 127 13 - 0 46 30 - 0 38 35 - 0 50 1 - 0 35 3 -0.69 - 24 0 0 - 0 23 45 18 31 14.7 50 128 12 - 0 27 43 - 0 19 46 - 0 31 15 - 0 16 13 -0.69 - 23 0 0 - 0 4 2 18 31 24.3 51 129 11 - 0 8 2 - 0 0 2 - 0 11 35 0 3 31 -0.69 - 22 0 0 0 16 35 18 31 34.1 51 131 10 0 12 35 0 20 36 0 9 1 0 24 11 -0.69 - 21 0 0 0 38 8 18 31 44.0 52 132 9 0 34 7 0 42 10 0 30 31 0 45 46 -0.69 - 20 0 0 1 0 37 18 31 54.0 52 133 8 0 56 34 1 4 40 0 52 58 1 8 17 -0.69 - 19 0 0 1 24 1 18 32 4.1 53 134 6 1 19 57 1 28 6 1 16 20 1 31 44 -0.69 - 18 0 0 1 48 22 18 32 14.3 53 136 5 1 44 17 1 52 28 1 40 38 1 56 7 -0.69 - 17 0 0 2 13 39 18 32 24.7 54 137 4 2 9 32 2 17 46 2 5 52 2 21 26 -0.69 - 16 0 0 2 39 52 18 32 35.1 54 139 3 2 35 44 2 44 1 2 32 3 2 47 43 -0.69 - 15 0 0 3 7 3 18 32 45.7 55 140 2 3 2 53 3 11 12 2 59 10 3 14 55 -0.69 - 14 0 0 3 35 10 18 32 56.3 55 142 1 3 30 59 3 39 21 3 27 15 3 43 5 -0.69 - 13 0 0 4 4 14 18 33 7.1 55 144 0 4 0 1 4 8 27 3 56 16 4 12 13 -0.69 - 12 0 0 4 34 15 18 33 17.9 55 145 -1 4 30 1 4 38 30 4 26 14 4 42 17 -0.69 - 11 0 0 5 5 14 18 33 28.8 55 147 -2 5 0 58 5 9 30 4 57 10 5 13 18 -0.69 - 10 0 0 5 37 9 18 33 39.8 56 149 -4 5 32 52 5 41 27 5 29 2 5 45 17 -0.69 - 9 0 0 6 10 2 18 33 50.9 56 151 -5 6 5 43 6 14 22 6 1 52 6 18 14 -0.69 - 8 0 0 6 43 53 18 34 2.1 56 152 -6 6 39 31 6 48 14 6 35 39 6 52 7 -0.68 - 7 0 0 7 18 40 18 34 13.3 56 154 -7 7 14 17 7 23 3 7 10 23 7 26 58 -0.68 - 6 0 0 7 54 24 18 34 24.5 55 156 -8 7 49 59 7 58 49 7 46 3 8 2 45 -0.68 - 5 0 0 8 31 5 18 34 35.8 55 158 -9 8 26 38 8 35 31 8 22 40 8 39 30 -0.68 - 4 0 0 9 8 42 18 34 47.2 55 160 -10 9 4 13 9 13 10 9 0 14 9 17 10 -0.68 - 3 0 0 9 47 14 18 34 58.5 55 162 -12 9 42 44 9 51 45 9 38 43 9 55 47 -0.68 - 2 0 0 10 26 43 18 35 9.9 54 164 -13 10 22 10 10 31 16 10 18 7 10 35 19 -0.68 - 1 0 0 11 7 6 18 35 21.3 54 165 -14 11 2 31 11 11 41 10 58 27 11 15 46 -0.68 0 0 0 11 48 23 18 35 32.7 54 167 -15 11 43 47 11 53 0 11 39 40 11 57 7 -0.68 1 0 0 12 30 34 18 35 44.1 53 169 -16 12 25 55 12 35 13 12 21 47 12 39 22 -0.68 2 0 0 13 13 37 18 35 55.5 53 171 -17 13 8 57 13 18 19 13 4 46 13 22 30 -0.68 3 0 0 13 57 33 18 36 6.8 52 172 -18 13 52 50 14 2 16 13 48 37 14 6 29 -0.68 4 0 0 14 42 18 18 36 18.1 51 174 -19 14 37 33 14 47 4 14 33 19 14 51 19 -0.68 5 0 0 15 27 54 18 36 29.3 51 176 -21 15 23 6 15 32 41 15 18 50 15 36 58 -0.68 6 0 0 16 14 17 18 36 40.5 50 177 -22 16 9 27 16 19 7 16 5 9 16 23 26 -0.68 7 0 0 17 1 27 18 36 51.6 49 179 -23 16 56 35 17 6 19 16 52 15 17 10 40 -0.68 8 0 0 17 49 22 18 37 2.6 49 180 -24 17 44 28 17 54 17 17 40 6 17 58 40 -0.68 9 0 0 18 38 1 18 37 13.5 48 182 -25 18 33 4 18 42 58 18 28 40 18 47 23 -0.67 10 0 0 19 27 21 18 37 24.3 47 183 -26 19 22 23 19 32 20 19 17 56 19 36 48 -0.67 11 0 0 20 17 22 18 37 34.9 46 184 -27 20 12 21 20 22 23 20 7 52 20 26 52 -0.67 12 0 0 21 8 0 18 37 45.4 45 186 -28 21 2 56 21 13 3 20 58 26 21 17 35 -0.67 13 0 0 21 59 13 18 37 55.8 44 187 -29 21 54 8 22 4 19 21 49 36 22 8 52 -0.67 14 0 0 22 51 0 18 38 6.0 43 188 -30 22 45 52 22 56 8 22 41 18 23 0 44 -0.67 15 0 0 23 43 18 18 38 16.0 42 189 -31 23 38 8 23 48 28 23 33 32 23 53 5 -0.67 16 0 0 24 36 4 18 38 25.8 41 190 -32 24 30 51 24 41 16 24 26 13 24 45 55 -0.67 17 0 0 25 29 15 18 38 35.4 40 191 -33 25 24 1 25 34 30 25 19 21 25 39 11 -0.67 18 0 0 26 22 49 18 38 44.7 39 193 -34 26 17 33 26 28 6 26 12 51 26 32 49 -0.67 19 0 0 27 16 43 18 38 53.9 38 194 -35 27 11 25 27 22 2 27 6 41 27 26 47 -0.67 20 0 0 28 10 55 18 39 2.8 37 195 -36 28 5 34 28 16 16 28 0 49 28 21 2 -0.67 21 0 0 29 5 20 18 39 11.5 36 196 -36 28 59 57 29 10 43 28 55 10 29 15 31 -0.67 22 0 0 29 59 55 18 39 19.9 35 196 -37 29 54 31 30 5 20 29 49 42 30 10 10 -0.67 23 0 0 30 54 39 18 39 28.0 33 197 -38 30 49 13 31 0 5 30 44 22 31 4 57 -0.67 24 0 0 31 49 26 18 39 35.9 32 198 -39 31 43 58 31 54 55 31 39 6 31 59 48 -0.67 25 0 0 32 44 15 18 39 43.4 31 199 -39 32 38 46 32 49 46 32 33 52 32 54 40 -0.67 26 0 0 33 39 2 18 39 50.7 30 200 -40 33 33 31 33 44 34 33 28 36 33 49 30 -0.67 27 0 0 34 33 43 18 39 57.7 29 201 -41 34 28 10 34 39 16 34 23 14 34 44 14 -0.67 28 0 0 35 28 15 18 40 4.4 28 202 -41 35 22 41 35 33 49 35 17 43 35 38 48 -0.67 29 0 0 36 22 35 18 40 10.8 27 203 -42 36 16 59 36 28 10 36 12 1 36 33 10 -0.67 30 0 0 37 16 39 18 40 16.9 25 203 -42 37 11 2 37 22 16 37 6 3 37 27 17 -0.67 31 0 0 38 10 25 18 40 22.7 24 204 -43 38 4 47 38 16 3 37 59 47 38 21 5 -0.67 32 0 0 39 3 49 18 40 28.2 23 205 -43 38 58 11 39 9 29 38 53 9 39 14 31 -0.67 33 0 0 39 56 49 18 40 33.3 22 206 -44 39 51 10 40 2 29 39 46 8 40 7 33 -0.67 34 0 0 40 49 22 18 40 38.2 21 207 -44 40 43 42 40 55 2 40 38 39 41 0 7 -0.67 35 0 0 41 41 24 18 40 42.8 20 207 -44 41 35 43 41 47 5 41 30 40 41 52 10 -0.67 36 0 0 42 32 53 18 40 47.1 19 208 -45 42 27 12 42 38 35 42 22 8 42 43 40 -0.67 37 0 0 43 23 47 18 40 51.0 18 209 -45 43 18 5 43 29 29 43 13 1 43 34 34 -0.67 38 0 0 44 14 2 18 40 54.7 16 210 -45 44 8 20 44 19 44 44 3 16 44 24 50 -0.67 39 0 0 45 3 37 18 40 58.2 15 210 -45 44 57 55 45 9 19 44 52 51 45 14 25 -0.67 40 0 0 45 52 29 18 41 1.3 14 211 -45 45 46 47 45 58 11 45 41 43 46 3 17 -0.67 41 0 0 46 40 37 18 41 4.2 13 212 -45 46 34 56 46 46 19 46 29 52 46 51 24 -0.67 42 0 0 47 27 59 18 41 6.8 12 213 -45 47 22 18 47 33 40 47 17 14 47 38 46 -0.67 43 0 0 48 14 33 18 41 9.2 11 214 -45 48 8 52 48 20 14 48 3 49 48 25 19 -0.67 44 0 0 49 0 17 18 41 11.3 10 214 -45 48 54 37 49 5 58 48 49 34 49 11 2 -0.67 45 0 0 49 45 11 18 41 13.2 9 215 -45 49 39 32 49 50 51 49 34 30 49 55 54 -0.68 46 0 0 50 29 13 18 41 14.9 8 216 -45 50 23 35 50 34 52 50 18 33 50 39 55 -0.68 47 0 0 51 12 22 18 41 16.4 7 217 -45 51 6 45 51 18 1 51 1 44 51 23 3 -0.68 48 0 0 51 54 38 18 41 17.6 6 217 -45 51 49 2 52 0 15 51 44 2 52 5 16 -0.68 49 0 0 52 36 0 18 41 18.7 5 218 -45 52 30 25 52 41 36 52 25 26 52 46 36 -0.68 50 0 0 53 16 27 18 41 19.6 5 219 -45 53 10 53 53 22 2 53 5 56 53 27 1 -0.68 51 0 0 53 55 59 18 41 20.3 4 220 -45 53 50 27 54 1 33 53 45 30 54 6 30 -0.69 52 0 0 54 34 36 18 41 20.8 3 221 -44 54 29 5 54 40 8 54 24 10 54 45 5 -0.69 53 0 0 55 12 18 18 41 21.2 2 222 -44 55 6 49 55 17 49 55 1 55 55 22 44 -0.70 54 0 0 55 49 5 18 41 21.4 1 222 -44 55 43 37 55 54 34 55 38 45 55 59 27 -0.73 55 0 0 56 24 57 18 41 21.5 0 223 -44 56 19 31 56 30 24 56 14 40 56 35 16 -0.89 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 6939-00550-1 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 21 29 21.6500 DE: -23 47 41.013 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 21 29 21.6494 DE: -23 47 41.016 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 8.8 * B mag [mag]: 9.1 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1123) Shapleya asteroid class: approx. diameter [km]: 11 approx. diameter ["]: 0.011 distance from Earth [AU]: 1.49190 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#53 date of fit: 2023 Apr 24 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): 0.014", 0.001", 77.906° remarks: * orbital elements for (1123)Shapleya : Mean anomaly = 322.0226702128 deg Arg. of pericenter = 317.6287767855 deg Long. of node = 79.8448967214 deg Inclination = 6.4188096504 deg Eccentricity = 0.1563939523 Semimajor axis = 2.2249285792 AU Perihelion dist = 1.8769632051 AU Mag: H = 11.68, G = 0.15 Epoch of elements : MJD 60609.77358542 TDT (2024 Oct 26.7736) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr24,0.97,2024,10,26,18.566051,-0.289930,0.484990,5.708685,3.430142,0.004848,0.001835,0.000000,0.000000 8.5831,-23.6873,-102.52,-12.80,False TYC 6939-00550-1,21.48934725,-23.7947256,9.07,8.81,8.67,0.1,0,,21.51313078,-23.6872589,6.50,6.19,0,0,0 1123,Shapleya,15.31,11.489,1.4919,0,0,2.451,20.22,,1.0,0 0,321.7929,2024,10,26,317.6288,79.8449,6.4188,0.15639,2.22493,1.87696,11.68,5.0,0.15 1.446,0.0140,0.0014,78,0.0047,Known errors,1.01,0,-1,-1 20241026_0550-1,60140.66 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:51 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org