IOTA/IOTA-ES occultation update for (2082) Galahad / UCAC4 327-155011 event on 2024 Oct 12, 01:29 UT Visible from Summary ------- On 2024 Oct 12 UT, the 17.191 km diameter asteroid (2082) Galahad will occult a 10.3 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 8.09 mag to 18.41 mag (the magnitude of the asteroid) for at most 0.680 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: 88 * date and approx. time of event: 2024 Oct 12, 01:26 - 2024 Oct 12, 01:32 * geocentric midpoint of event [JD]: 2460595.56233875 * magnitude of target star: 10.32 * magnitude drop [mag]: 8.09 * estimated maximum duration [s]: 0.680 * Moon: 63 % sunlit, 27° distance * Sun: 78° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 25 * 1 sigma uncertainty interval [path widths]: +/- 0.55 * 1 sigma uncertainty interval [seconds]: +/- 2.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.027, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.027", 0.005", 91°) * approx speed of asteroid's shadow [km/s]: 25.3230 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 327-155011 by 2082 Galahad on 2024 Oct 12 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 168 0 0 39 24 43 1 26 53.9 1 123 42 39 16 40 39 32 46 39 7 52 39 41 39 .... 169 0 0 38 54 56 1 26 54.0 2 124 42 38 46 55 39 2 58 38 38 9 39 11 48 -0.58 170 0 0 38 25 20 1 26 54.2 2 124 42 38 17 21 38 33 20 38 8 37 38 42 9 -0.76 171 0 0 37 55 57 1 26 54.5 3 125 42 37 48 0 38 3 55 37 39 18 38 12 42 -0.84 172 0 0 37 26 48 1 26 54.9 4 126 42 37 18 53 37 34 44 37 10 13 37 43 29 -0.89 173 0 0 36 57 53 1 26 55.4 5 126 42 36 50 0 37 5 48 36 41 22 37 14 30 -0.92 174 0 0 36 29 14 1 26 56.0 6 127 43 36 21 23 36 37 7 36 12 47 36 45 47 -0.94 175 0 0 36 0 52 1 26 56.7 7 128 43 35 53 3 36 8 43 35 44 29 36 17 21 -0.95 176 0 0 35 32 47 1 26 57.5 8 128 43 35 24 59 35 40 36 35 16 28 35 49 12 -0.97 177 0 0 35 5 0 1 26 58.4 9 129 43 34 57 15 35 12 47 34 48 45 35 21 22 -0.98 178 0 0 34 37 33 1 26 59.3 10 129 43 34 29 49 34 45 18 34 21 22 34 53 50 -0.98 179 0 0 34 10 26 1 27 0.4 11 130 43 34 2 44 34 18 9 33 54 18 34 26 39 -0.99 -180 0 0 33 43 40 1 27 1.6 12 131 42 33 36 0 33 51 21 33 27 36 33 59 49 -1.00 -179 0 0 33 17 16 1 27 2.9 13 131 42 33 9 38 33 24 55 33 1 16 33 33 21 -1.00 -178 0 0 32 51 14 1 27 4.3 14 132 42 32 43 38 32 58 52 32 35 18 33 7 16 -1.01 -177 0 0 32 25 36 1 27 5.7 14 132 42 32 18 1 32 33 12 32 9 44 32 41 34 -1.01 -176 0 0 32 0 22 1 27 7.3 15 133 42 31 52 49 32 7 56 31 44 33 32 16 16 -1.01 -175 0 0 31 35 32 1 27 9.0 16 134 41 31 28 1 31 43 5 31 19 47 31 51 23 -1.02 -174 0 0 31 11 9 1 27 10.7 17 134 41 31 3 39 31 18 39 30 55 27 31 26 55 -1.02 -173 0 0 30 47 11 1 27 12.6 18 135 41 30 39 43 30 54 40 30 31 33 31 2 54 -1.02 -172 0 0 30 23 40 1 27 14.5 19 135 41 30 16 14 30 31 7 30 8 6 30 39 19 -1.02 -171 0 0 30 0 36 1 27 16.5 20 136 40 29 53 12 30 8 2 29 45 6 30 16 12 -1.03 -170 0 0 29 38 1 1 27 18.7 21 137 40 29 30 39 29 45 25 29 22 34 29 53 33 -1.03 -169 0 0 29 15 54 1 27 20.9 22 137 39 29 8 33 29 23 16 29 0 30 29 31 23 -1.03 -168 0 0 28 54 16 1 27 23.2 22 138 39 28 46 57 29 1 37 28 38 56 29 9 42 -1.03 -167 0 0 28 33 8 1 27 25.5 23 139 38 28 25 51 28 40 27 28 17 51 28 48 30 -1.03 -166 0 0 28 12 30 1 27 28.0 24 139 38 28 5 14 28 19 48 27 57 16 28 27 49 -1.04 -165 0 0 27 52 23 1 27 30.5 25 140 37 27 45 8 27 59 39 27 37 12 28 7 38 -1.04 -164 0 0 27 32 47 1 27 33.2 26 141 37 27 25 33 27 40 1 27 17 39 27 47 59 -1.04 -163 0 0 27 13 42 1 27 35.9 27 141 36 27 6 30 27 20 55 26 58 37 27 28 51 -1.04 -162 0 0 26 55 9 1 27 38.7 27 142 36 26 47 58 27 2 20 26 40 7 27 10 15 -1.04 -161 0 0 26 37 8 1 27 41.5 28 143 35 26 29 59 26 44 18 26 22 9 26 52 12 -1.04 -160 0 0 26 19 40 1 27 44.4 29 144 35 26 12 32 26 26 49 26 4 44 26 34 41 -1.04 -159 0 0 26 2 45 1 27 47.4 30 144 34 25 55 39 26 9 53 25 47 52 26 17 43 -1.05 -158 0 0 25 46 24 1 27 50.5 31 145 33 25 39 18 25 53 30 25 31 32 26 1 19 -1.05 -157 0 0 25 30 36 1 27 53.6 31 146 33 25 23 32 25 37 41 25 15 47 25 45 29 -1.05 -156 0 0 25 15 22 1 27 56.8 32 147 32 25 8 19 25 22 26 25 0 35 25 30 12 -1.05 -155 0 0 25 0 42 1 28 0.1 33 148 31 24 53 40 25 7 45 24 45 58 25 15 30 -1.05 -154 0 0 24 46 37 1 28 3.4 33 148 30 24 39 36 24 53 38 24 31 55 25 1 23 -1.05 -153 0 0 24 33 6 1 28 6.8 34 149 30 24 26 6 24 40 7 24 18 27 24 47 50 -1.05 -152 0 0 24 20 11 1 28 10.2 35 150 29 24 13 12 24 27 10 24 5 33 24 34 52 -1.05 -151 0 0 24 7 50 1 28 13.7 35 151 28 24 0 52 24 14 49 23 53 15 24 22 30 -1.05 -150 0 0 23 56 5 1 28 17.3 36 152 27 23 49 8 24 3 3 23 41 32 24 10 43 -1.05 -149 0 0 23 44 56 1 28 20.9 37 153 27 23 38 0 23 51 53 23 30 24 23 59 32 -1.05 -148 0 0 23 34 22 1 28 24.5 37 154 26 23 27 27 23 41 19 23 19 52 23 48 57 -1.06 -147 0 0 23 24 25 1 28 28.2 38 155 25 23 17 30 23 31 20 23 9 56 23 38 58 -1.06 -146 0 0 23 15 3 1 28 31.9 38 156 24 23 8 9 23 21 58 23 0 36 23 29 34 -1.06 -145 0 0 23 6 18 1 28 35.7 39 157 23 22 59 25 23 13 12 22 51 52 23 20 48 -1.06 -144 0 0 22 58 9 1 28 39.5 39 158 23 22 51 16 23 5 2 22 43 44 23 12 37 -1.06 -143 0 0 22 50 36 1 28 43.4 40 159 22 22 43 44 22 57 29 22 36 13 23 5 4 -1.06 -142 0 0 22 43 40 1 28 47.2 40 160 21 22 36 49 22 50 33 22 29 18 22 58 7 -1.06 -141 0 0 22 37 21 1 28 51.2 40 161 20 22 30 30 22 44 13 22 23 0 22 51 46 -1.06 -140 0 0 22 31 39 1 28 55.1 41 162 19 22 24 48 22 38 30 22 17 18 22 46 3 -1.06 -139 0 0 22 26 33 1 28 59.1 41 164 18 22 19 43 22 33 24 22 12 13 22 40 57 -1.06 -138 0 0 22 22 4 1 29 3.1 42 165 17 22 15 15 22 28 55 22 7 45 22 36 27 -1.06 -137 0 0 22 18 13 1 29 7.1 42 166 17 22 11 23 22 25 3 22 3 54 22 32 35 -1.06 -136 0 0 22 14 58 1 29 11.2 42 167 16 22 8 9 22 21 48 22 0 40 22 29 20 -1.06 -135 0 0 22 12 21 1 29 15.2 42 168 15 22 5 32 22 19 11 21 58 3 22 26 42 -1.06 -134 0 0 22 10 20 1 29 19.3 43 170 14 22 3 31 22 17 10 21 56 3 22 24 41 -1.06 -133 0 0 22 8 57 1 29 23.4 43 171 13 22 2 8 22 15 47 21 54 40 22 23 18 -1.06 -132 0 0 22 8 11 1 29 27.5 43 172 12 22 1 22 22 15 1 21 53 54 22 22 32 -1.06 -131 0 0 22 8 2 1 29 31.7 43 173 11 22 1 14 22 14 52 21 53 46 22 22 23 -1.06 -130 0 0 22 8 31 1 29 35.8 43 175 10 22 1 42 22 15 21 21 54 14 22 22 52 -1.07 -129 0 0 22 9 36 1 29 39.9 43 176 9 22 2 47 22 16 26 21 55 19 22 23 57 -1.07 -128 0 0 22 11 19 1 29 44.1 43 177 8 22 4 30 22 18 9 21 57 2 22 25 40 -1.07 -127 0 0 22 13 39 1 29 48.2 43 178 7 22 6 50 22 20 29 21 59 22 22 28 1 -1.07 -126 0 0 22 16 36 1 29 52.4 43 180 6 22 9 47 22 23 27 22 2 18 22 30 59 -1.07 -125 0 0 22 20 11 1 29 56.5 43 181 6 22 13 21 22 27 1 22 5 52 22 34 33 -1.07 -124 0 0 22 24 22 1 30 0.7 43 182 5 22 17 32 22 31 13 22 10 3 22 38 45 -1.07 -123 0 0 22 29 10 1 30 4.8 43 183 4 22 22 20 22 36 2 22 14 50 22 43 35 -1.07 -122 0 0 22 34 36 1 30 8.9 43 185 3 22 27 45 22 41 28 22 20 15 22 49 1 -1.07 -121 0 0 22 40 38 1 30 13.0 43 186 2 22 33 47 22 47 30 22 26 16 22 55 4 -1.07 -120 0 0 22 47 17 1 30 17.1 42 187 1 22 40 25 22 54 10 22 32 54 23 1 44 -1.07 -119 0 0 22 54 33 1 30 21.2 42 188 0 22 47 40 23 1 26 22 40 8 23 9 1 -1.07 -118 0 0 23 2 25 1 30 25.2 42 190 -1 22 55 32 23 9 19 22 48 0 23 16 55 -1.07 -117 0 0 23 10 54 1 30 29.3 41 191 -2 23 4 0 23 17 49 22 56 27 23 25 25 -1.07 -116 0 0 23 19 59 1 30 33.3 41 192 -3 23 13 5 23 26 55 23 5 31 23 34 32 -1.07 -115 0 0 23 29 41 1 30 37.3 41 193 -4 23 22 46 23 36 37 23 15 11 23 44 15 -1.07 -114 0 0 23 39 59 1 30 41.2 40 194 -5 23 33 3 23 46 56 23 25 27 23 54 34 -1.07 -113 0 0 23 50 52 1 30 45.2 40 195 -6 23 43 56 23 57 50 23 36 19 24 5 30 -1.07 -112 0 0 24 2 22 1 30 49.1 40 197 -7 23 55 24 24 9 20 23 47 47 24 17 1 -1.07 -111 0 0 24 14 27 1 30 52.9 39 198 -8 24 7 28 24 21 26 23 59 50 24 29 8 -1.07 -110 0 0 24 27 7 1 30 56.8 39 199 -9 24 20 8 24 34 8 24 12 28 24 41 51 -1.07 -109 0 0 24 40 23 1 31 0.5 38 200 -10 24 33 23 24 47 25 24 25 42 24 55 9 -1.07 -108 0 0 24 54 14 1 31 4.3 38 201 -11 24 47 12 25 1 17 24 39 30 25 9 2 -1.07 -107 0 0 25 8 39 1 31 8.0 37 202 -11 25 1 37 25 15 43 24 53 54 25 23 29 -1.07 -106 0 0 25 23 39 1 31 11.6 36 203 -12 25 16 36 25 30 44 25 8 51 25 38 32 -1.07 -105 0 0 25 39 14 1 31 15.2 36 204 -13 25 32 9 25 46 20 25 24 23 25 54 9 -1.07 -104 0 0 25 55 22 1 31 18.8 35 205 -14 25 48 16 26 2 29 25 40 29 26 10 20 -1.07 -103 0 0 26 12 4 1 31 22.3 35 206 -15 26 4 57 26 19 13 25 57 8 26 27 4 -1.07 -102 0 0 26 29 20 1 31 25.7 34 207 -16 26 22 11 26 36 29 26 14 21 26 44 23 -1.07 -101 0 0 26 47 8 1 31 29.1 33 207 -17 26 39 58 26 54 19 26 32 7 27 2 14 -1.07 -100 0 0 27 5 29 1 31 32.4 33 208 -18 26 58 18 27 12 42 26 50 25 27 20 38 -1.07 - 99 0 0 27 24 23 1 31 35.7 32 209 -19 27 17 10 27 31 37 27 9 15 27 39 34 -1.07 - 98 0 0 27 43 48 1 31 38.9 31 210 -20 27 36 33 27 51 3 27 28 38 27 59 3 -1.07 - 97 0 0 28 3 45 1 31 42.0 30 211 -21 27 56 29 28 11 1 27 48 31 28 19 3 -1.07 - 96 0 0 28 24 12 1 31 45.1 30 212 -21 28 16 55 28 31 31 28 8 56 28 39 33 -1.07 - 95 0 0 28 45 10 1 31 48.1 29 213 -22 28 37 51 28 52 30 28 29 51 29 0 35 -1.07 - 94 0 0 29 6 39 1 31 51.0 28 213 -23 28 59 18 29 14 0 28 51 15 29 22 7 -1.07 - 93 0 0 29 28 36 1 31 53.9 27 214 -24 29 21 14 29 36 0 29 13 10 29 44 8 -1.07 - 92 0 0 29 51 3 1 31 56.6 26 215 -25 29 43 39 29 58 28 29 35 33 30 6 38 -1.07 - 91 0 0 30 13 59 1 31 59.3 26 216 -26 30 6 33 30 21 25 29 58 25 30 29 37 -1.07 - 90 0 0 30 37 22 1 32 1.9 25 216 -26 30 29 54 30 44 50 30 21 45 30 53 4 -1.07 - 89 0 0 31 1 12 1 32 4.5 24 217 -27 30 53 43 31 8 42 30 45 31 31 16 58 -1.07 - 88 0 0 31 25 29 1 32 6.9 23 218 -28 31 17 59 31 33 1 31 9 45 31 41 19 -1.07 - 87 0 0 31 50 12 1 32 9.3 22 218 -29 31 42 40 31 57 46 31 34 24 32 6 5 -1.07 - 86 0 0 32 15 21 1 32 11.5 21 219 -30 32 7 46 32 22 56 31 59 29 32 31 18 -1.07 - 85 0 0 32 40 53 1 32 13.7 21 220 -30 32 33 17 32 48 31 32 24 58 32 56 54 -1.07 - 84 0 0 33 6 50 1 32 15.8 20 221 -31 32 59 12 33 14 29 32 50 51 33 22 55 -1.07 - 83 0 0 33 33 10 1 32 17.8 19 221 -32 33 25 30 33 40 51 33 17 7 33 49 19 -1.07 - 82 0 0 33 59 52 1 32 19.7 18 222 -33 33 52 11 34 7 35 33 43 45 34 16 5 -1.07 - 81 0 0 34 26 56 1 32 21.5 17 223 -33 34 19 12 34 34 41 34 10 45 34 43 12 -1.07 - 80 0 0 34 54 20 1 32 23.3 16 223 -34 34 46 35 35 2 7 34 38 5 35 10 41 -1.07 - 79 0 0 35 22 4 1 32 24.9 15 224 -35 35 14 17 35 29 53 35 5 45 35 38 29 -1.07 - 78 0 0 35 50 7 1 32 26.4 14 225 -35 35 42 18 35 57 58 35 33 44 36 6 36 -1.07 - 77 0 0 36 18 28 1 32 27.9 13 225 -36 36 10 37 36 26 20 36 2 1 36 35 1 -1.08 - 76 0 0 36 47 6 1 32 29.2 12 226 -36 36 39 13 36 55 0 36 30 36 37 3 43 -1.08 - 75 0 0 37 16 0 1 32 30.4 12 226 -37 37 8 5 37 23 56 36 59 26 37 32 41 -1.08 - 74 0 0 37 45 9 1 32 31.6 11 227 -38 37 37 13 37 53 7 37 28 31 38 1 54 -1.08 - 73 0 0 38 14 33 1 32 32.6 10 228 -38 38 6 34 38 22 33 37 57 50 38 31 21 -1.08 - 72 0 0 38 44 9 1 32 33.6 9 228 -39 38 36 9 38 52 11 38 27 23 39 1 1 -1.08 - 71 0 0 39 13 57 1 32 34.4 8 229 -39 39 5 55 39 22 1 38 57 7 39 30 54 -1.09 - 70 0 0 39 43 57 1 32 35.2 7 230 -40 39 35 53 39 52 2 39 27 3 40 0 57 -1.09 - 69 0 0 40 14 6 1 32 35.9 6 230 -40 40 6 0 40 22 13 39 57 9 40 31 10 -1.10 - 68 0 0 40 44 24 1 32 36.4 5 231 -40 40 36 17 40 52 33 40 27 23 41 1 32 -1.10 - 67 0 0 41 14 50 1 32 36.9 4 232 -41 41 6 41 41 23 1 40 57 45 41 32 1 -1.11 - 66 0 0 41 45 22 1 32 37.3 3 232 -41 41 37 12 41 53 35 41 28 14 42 2 37 -1.13 - 65 0 0 42 16 0 1 32 37.5 2 233 -42 42 7 48 42 24 14 41 58 49 42 33 19 -1.15 - 64 0 0 42 46 43 1 32 37.7 2 234 -42 42 38 29 42 54 58 42 29 28 43 4 5 -1.20 - 63 0 0 43 17 28 1 32 37.8 1 234 -42 43 9 13 43 25 46 43 0 10 43 34 54 -1.39 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 327-155011 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 29 56.9431 DE: -24 42 43.166 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 29 56.9429 DE: -24 42 43.166 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 10.3 * B mag [mag]: 10.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2082) Galahad asteroid class: approx. diameter [km]: 17 approx. diameter ["]: 0.009 distance from Earth [AU]: 2.66680 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#41 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): 0.027", 0.005", 90.92° remarks: * orbital elements for (2082)Galahad : Mean anomaly = 47.7696441277 deg Arg. of pericenter = 144.4692202000 deg Long. of node = 90.0424794919 deg Inclination = 3.0679360745 deg Eccentricity = 0.1668001077 Semimajor axis = 2.9193991455 AU Perihelion dist = 2.4324430537 AU Mag: H = 13.12, G = 0.15 Epoch of elements : MJD 60595.06233883 TDT (2024 Oct 12.0623) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#412023Apr24,0.68,2024,10,12,1.496130,-0.029462,0.728040,14.280931,0.587992,0.005574,0.000275,0.000000,0.000000 -125.6992,-24.6964,154.18,-7.53,False UCAC4 327-155011,18.49915090,-24.7119905,10.66,10.32,10.14,0.0,0,,18.52437531,-24.6964137,8.09,7.83,0,0,0 2082,Galahad,18.41,17.191,2.6668,0,0,3.456,1.94,,1.6,0 0,47.5597,2024,10,11,144.4692,90.0425,3.0679,0.16680,2.91940,2.43244,13.12,5.0,0.15 1.549,0.0267,0.0047,91,0.0049,Known errors,0.68,0,-1,-1 20241012_155011,60140.63 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:04 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org