IOTA/IOTA-ES occultation update for (1080) Orchis / UCAC4 306-095196 event on 2024 Jun 05, 10:11 UT Visible from Summary ------- On 2024 Jun 05 UT, the 22.8320981181378 km diameter asteroid (1080) Orchis will occult a 11.4 mag star in the constellation Scorpius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.09 mag to 16.48 mag (the magnitude of the asteroid) for at most 1.590 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: 99 * date and approx. time of event: 2024 Jun 05, 10:06 - 2024 Jun 05, 10:17 * geocentric midpoint of event [JD]: 2460466.92495933 * magnitude of target star: 11.40 * magnitude drop [mag]: 5.09 * estimated maximum duration [s]: 1.590 * Moon: 2 % sunlit, 167° distance * Sun: 173° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 30 * 1 sigma uncertainty interval [path widths]: +/- 0.30 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.013, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.013", 0.005", 98°) * approx speed of asteroid's shadow [km/s]: 14.4928 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 306-095196 by 1080 Orchis on 2024 Jun 5 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 139 0 0 38 19 56 10 17 36.5 0 128 -3 38 30 17 38 9 37 38 36 26 38 3 30 .... 140 0 0 37 42 45 10 17 36.4 1 129 -4 37 53 5 37 32 28 37 59 13 37 26 23 -0.32 141 0 0 37 5 36 10 17 36.1 2 129 -5 37 15 53 36 55 20 37 22 0 36 49 17 -0.55 142 0 0 36 28 28 10 17 35.7 3 130 -6 36 38 43 36 18 15 36 44 49 36 12 12 -0.64 143 0 0 35 51 23 10 17 35.0 4 131 -7 36 1 36 35 41 12 36 7 40 35 35 10 -0.68 144 0 0 35 14 22 10 17 34.2 5 131 -8 35 24 33 35 4 13 35 30 36 34 58 13 -0.71 145 0 0 34 37 28 10 17 33.2 6 132 -9 34 47 36 34 27 21 34 53 38 34 21 22 -0.73 146 0 0 34 0 41 10 17 32.0 7 132 -10 34 10 47 33 50 36 34 16 47 33 44 39 -0.75 147 0 0 33 24 3 10 17 30.6 8 133 -11 33 34 6 33 14 1 33 40 5 33 8 5 -0.76 148 0 0 32 47 35 10 17 29.0 9 134 -12 32 57 36 32 37 35 33 3 33 32 31 41 -0.77 149 0 0 32 11 19 10 17 27.3 10 134 -13 32 21 17 32 1 22 32 27 13 31 55 28 -0.78 150 0 0 31 35 15 10 17 25.3 11 135 -14 31 45 11 31 25 21 31 51 6 31 19 29 -0.78 151 0 0 30 59 26 10 17 23.2 12 135 -15 31 9 20 30 49 34 31 15 12 30 43 44 -0.79 152 0 0 30 23 52 10 17 20.9 13 136 -16 30 33 43 30 14 3 30 39 35 30 8 15 -0.79 153 0 0 29 48 35 10 17 18.5 15 136 -17 29 58 24 29 38 49 30 4 13 29 33 2 -0.79 154 0 0 29 13 36 10 17 15.8 16 137 -18 29 23 22 29 3 52 29 29 10 28 58 7 -0.80 155 0 0 28 38 56 10 17 13.0 17 137 -20 28 48 39 28 29 15 28 54 25 28 23 31 -0.80 156 0 0 28 4 36 10 17 10.0 18 138 -21 28 14 16 27 54 58 28 20 1 27 49 15 -0.80 157 0 0 27 30 37 10 17 6.8 19 138 -22 27 40 14 27 21 1 27 45 58 27 15 20 -0.80 158 0 0 26 57 0 10 17 3.4 20 139 -23 27 6 35 26 47 27 27 12 16 26 41 48 -0.81 159 0 0 26 23 46 10 16 59.9 21 140 -24 26 33 18 26 14 16 26 38 58 26 8 38 -0.81 160 0 0 25 50 56 10 16 56.2 22 140 -25 26 0 26 25 41 29 26 6 4 25 35 53 -0.81 161 0 0 25 18 32 10 16 52.4 22 141 -26 25 27 58 25 9 6 25 33 35 25 3 32 -0.81 162 0 0 24 46 32 10 16 48.3 23 141 -27 24 55 56 24 37 10 25 1 31 24 31 37 -0.81 163 0 0 24 15 0 10 16 44.2 24 142 -28 24 24 21 24 5 40 24 29 54 24 0 9 -0.81 164 0 0 23 43 54 10 16 39.9 25 142 -29 23 53 13 23 34 37 23 58 45 23 29 8 -0.81 165 0 0 23 13 17 10 16 35.4 26 143 -30 23 22 33 23 4 3 23 28 3 22 58 34 -0.81 166 0 0 22 43 8 10 16 30.8 27 144 -31 22 52 22 22 33 57 22 57 51 22 28 30 -0.81 167 0 0 22 13 29 10 16 26.0 28 144 -32 22 22 40 22 4 20 22 28 7 21 58 55 -0.81 168 0 0 21 44 20 10 16 21.1 29 145 -33 21 53 28 21 35 13 21 58 54 21 29 49 -0.81 169 0 0 21 15 41 10 16 16.1 30 145 -34 21 24 47 21 6 37 21 30 11 21 1 15 -0.81 170 0 0 20 47 34 10 16 10.9 31 146 -34 20 56 37 20 38 32 21 1 59 20 33 11 -0.82 171 0 0 20 19 57 10 16 5.6 32 147 -35 20 28 58 20 10 58 20 34 19 20 5 39 -0.82 172 0 0 19 52 53 10 16 0.2 33 147 -36 20 1 52 19 43 56 20 7 12 19 38 38 -0.82 173 0 0 19 26 22 10 15 54.7 34 148 -37 19 35 18 19 17 27 19 40 36 19 12 11 -0.82 174 0 0 19 0 23 10 15 49.1 34 149 -38 19 9 17 18 51 31 19 14 34 18 46 16 -0.82 175 0 0 18 34 58 10 15 43.3 35 150 -39 18 43 49 18 26 8 18 49 5 18 20 54 -0.82 176 0 0 18 10 6 10 15 37.4 36 150 -40 18 18 56 18 1 19 18 24 10 17 56 6 -0.82 177 0 0 17 45 49 10 15 31.5 37 151 -41 17 54 36 17 37 3 17 59 49 17 31 52 -0.82 178 0 0 17 22 6 10 15 25.4 38 152 -42 17 30 50 17 13 22 17 36 2 17 8 12 -0.82 179 0 0 16 58 57 10 15 19.3 38 153 -43 17 7 40 16 50 15 17 12 50 16 45 7 -0.82 -180 0 0 16 36 23 10 15 13.0 39 153 -43 16 45 4 16 27 44 16 50 13 16 22 36 -0.82 -179 0 0 16 14 24 10 15 6.7 40 154 -44 16 23 3 16 5 47 16 28 11 16 0 40 -0.82 -178 0 0 15 53 1 10 15 0.3 41 155 -45 16 1 38 15 44 25 16 6 45 15 39 20 -0.82 -177 0 0 15 32 13 10 14 53.8 41 156 -46 15 40 48 15 23 39 15 45 54 15 18 35 -0.82 -176 0 0 15 12 1 10 14 47.2 42 157 -47 15 20 34 15 3 29 15 25 39 14 58 26 -0.82 -175 0 0 14 52 24 10 14 40.5 43 158 -47 15 0 56 14 43 54 15 5 59 14 38 52 -0.82 -174 0 0 14 33 24 10 14 33.8 43 159 -48 14 41 54 14 24 56 14 46 56 14 19 55 -0.82 -173 0 0 14 15 0 10 14 27.1 44 160 -49 14 23 28 14 6 33 14 28 30 14 1 33 -0.82 -172 0 0 13 57 12 10 14 20.2 45 161 -49 14 5 38 13 48 47 14 10 39 13 43 48 -0.82 -171 0 0 13 40 1 10 14 13.3 45 162 -50 13 48 26 13 31 37 13 53 25 13 26 39 -0.82 -170 0 0 13 23 26 10 14 6.4 46 163 -51 13 31 49 13 15 4 13 36 48 13 10 7 -0.82 -169 0 0 13 7 28 10 13 59.4 46 164 -51 13 15 49 12 59 7 13 20 47 12 54 11 -0.82 -168 0 0 12 52 6 10 13 52.3 47 165 -52 13 0 26 12 43 47 13 5 24 12 38 51 -0.82 -167 0 0 12 37 21 10 13 45.2 47 166 -53 12 45 40 12 29 3 12 50 37 12 24 8 -0.82 -166 0 0 12 23 13 10 13 38.1 48 167 -53 12 31 31 12 14 57 12 36 27 12 10 2 -0.82 -165 0 0 12 9 42 10 13 31.0 48 168 -54 12 17 59 12 1 27 12 22 54 11 56 33 -0.82 -164 0 0 11 56 48 10 13 23.8 48 170 -54 12 5 3 11 48 34 12 9 57 11 43 41 -0.82 -163 0 0 11 44 31 10 13 16.5 49 171 -55 11 52 45 11 36 18 11 57 39 11 31 26 -0.82 -162 0 0 11 32 51 10 13 9.3 49 172 -55 11 41 4 11 24 38 11 45 57 11 19 47 -0.82 -161 0 0 11 21 47 10 13 2.0 49 173 -55 11 30 0 11 13 36 11 34 52 11 8 45 -0.82 -160 0 0 11 11 21 10 12 54.7 50 175 -56 11 19 33 11 3 11 11 24 24 10 58 21 -0.82 -159 0 0 11 1 32 10 12 47.4 50 176 -56 11 9 43 10 53 23 11 14 34 10 48 33 -0.82 -158 0 0 10 52 21 10 12 40.0 50 177 -56 11 0 30 10 44 12 11 5 21 10 39 23 -0.82 -157 0 0 10 43 46 10 12 32.7 50 179 -57 10 51 55 10 35 38 10 56 45 10 30 49 -0.82 -156 0 0 10 35 48 10 12 25.3 50 180 -57 10 43 56 10 27 41 10 48 46 10 22 53 -0.82 -155 0 0 10 28 28 10 12 18.0 51 181 -57 10 36 35 10 20 22 10 41 25 10 15 34 -0.82 -154 0 0 10 21 45 10 12 10.6 51 183 -57 10 29 52 10 13 39 10 34 41 10 8 52 -0.82 -153 0 0 10 15 39 10 12 3.3 51 184 -57 10 23 45 10 7 34 10 28 34 10 2 47 -0.82 -152 0 0 10 10 10 10 11 55.9 51 185 -57 10 18 16 10 2 6 10 23 5 9 57 19 -0.82 -151 0 0 10 5 19 10 11 48.5 51 187 -57 10 13 24 9 57 15 10 18 12 9 52 28 -0.82 -150 0 0 10 1 5 10 11 41.2 51 188 -57 10 9 10 9 53 1 10 13 58 9 48 14 -0.82 -149 0 0 9 57 28 10 11 33.9 51 189 -57 10 5 32 9 49 24 10 10 20 9 44 38 -0.82 -148 0 0 9 54 28 10 11 26.5 50 191 -57 10 2 32 9 46 25 10 7 20 9 41 38 -0.82 -147 0 0 9 52 6 10 11 19.2 50 192 -57 10 0 10 9 44 2 10 4 57 9 39 16 -0.82 -146 0 0 9 50 20 10 11 11.9 50 193 -57 9 58 24 9 42 17 10 3 12 9 37 31 -0.82 -145 0 0 9 49 13 10 11 4.7 50 194 -57 9 57 16 9 41 10 10 2 4 9 36 24 -0.82 -144 0 0 9 48 42 10 10 57.4 50 196 -56 9 56 46 9 40 39 10 1 33 9 35 53 -0.82 -143 0 0 9 48 49 10 10 50.2 49 197 -56 9 56 53 9 40 46 10 1 40 9 36 0 -0.82 -142 0 0 9 49 33 10 10 43.0 49 198 -56 9 57 37 9 41 30 10 2 24 9 36 44 -0.82 -141 0 0 9 50 54 10 10 35.9 49 199 -56 9 58 59 9 42 51 10 3 46 9 38 5 -0.82 -140 0 0 9 52 53 10 10 28.8 48 201 -55 10 0 58 9 44 50 10 5 45 9 40 4 -0.82 -139 0 0 9 55 30 10 10 21.7 48 202 -55 10 3 34 9 47 26 10 8 22 9 42 40 -0.82 -138 0 0 9 58 43 10 10 14.6 48 203 -54 10 6 48 9 50 39 10 11 36 9 45 53 -0.82 -137 0 0 10 2 34 10 10 7.6 47 204 -54 10 10 40 9 54 30 10 15 28 9 49 43 -0.82 -136 0 0 10 7 3 10 10 0.7 47 205 -53 10 15 8 9 58 58 10 19 57 9 54 11 -0.82 -135 0 0 10 12 9 10 9 53.8 46 206 -53 10 20 15 10 4 3 10 25 4 9 59 16 -0.82 -134 0 0 10 17 52 10 9 46.9 46 207 -52 10 25 59 10 9 46 10 30 48 10 4 59 -0.82 -133 0 0 10 24 13 10 9 40.1 45 208 -52 10 32 20 10 16 6 10 37 10 10 11 18 -0.82 -132 0 0 10 31 11 10 9 33.4 45 209 -51 10 39 19 10 23 4 10 44 9 10 18 16 -0.82 -131 0 0 10 38 47 10 9 26.7 44 210 -51 10 46 56 10 30 39 10 51 46 10 25 50 -0.82 -130 0 0 10 47 0 10 9 20.1 43 211 -50 10 55 10 10 38 52 11 0 1 10 34 3 -0.82 -129 0 0 10 55 51 10 9 13.5 43 212 -49 11 4 2 10 47 42 11 8 53 10 42 52 -0.82 -128 0 0 11 5 20 10 9 7.0 42 213 -49 11 13 31 10 57 9 11 18 23 10 52 19 -0.82 -127 0 0 11 15 26 10 9 0.6 42 213 -48 11 23 38 11 7 14 11 28 30 11 2 23 -0.83 -126 0 0 11 26 9 10 8 54.3 41 214 -47 11 34 22 11 17 57 11 39 15 11 13 5 -0.83 -125 0 0 11 37 30 10 8 48.0 40 215 -46 11 45 44 11 29 17 11 50 38 11 24 25 -0.83 -124 0 0 11 49 29 10 8 41.8 39 216 -46 11 57 44 11 41 14 12 2 38 11 36 21 -0.83 -123 0 0 12 2 5 10 8 35.7 39 216 -45 12 10 21 11 53 49 12 15 16 11 48 56 -0.83 -122 0 0 12 15 18 10 8 29.7 38 217 -44 12 23 36 12 7 1 12 28 32 12 2 7 -0.83 -121 0 0 12 29 9 10 8 23.8 37 218 -43 12 37 28 12 20 51 12 42 25 12 15 56 -0.83 -120 0 0 12 43 38 10 8 17.9 36 218 -43 12 51 58 12 35 18 12 56 55 12 30 22 -0.83 -119 0 0 12 58 43 10 8 12.2 36 219 -42 13 7 5 12 50 22 13 12 3 12 45 26 -0.83 -118 0 0 13 14 27 10 8 6.5 35 220 -41 13 22 50 13 6 4 13 27 49 13 1 7 -0.83 -117 0 0 13 30 47 10 8 1.0 34 220 -40 13 39 12 13 22 23 13 44 12 13 17 25 -0.83 -116 0 0 13 47 45 10 7 55.6 33 221 -39 13 56 11 13 39 19 14 1 12 13 34 20 -0.83 -115 0 0 14 5 20 10 7 50.2 32 222 -38 14 13 48 13 56 53 14 18 50 13 51 53 -0.83 -114 0 0 14 23 32 10 7 45.0 31 222 -37 14 32 2 14 15 3 14 37 5 14 10 2 -0.83 -113 0 0 14 42 21 10 7 39.9 31 223 -36 14 50 52 14 33 50 14 55 56 14 28 48 -0.83 -112 0 0 15 1 47 10 7 34.9 30 223 -36 15 10 20 14 53 14 15 15 25 14 48 11 -0.83 -111 0 0 15 21 49 10 7 30.1 29 224 -35 15 30 25 15 13 15 15 35 31 15 8 11 -0.84 -110 0 0 15 42 29 10 7 25.3 28 224 -34 15 51 6 15 33 52 15 56 13 15 28 47 -0.84 -109 0 0 16 3 44 10 7 20.7 27 225 -33 16 12 23 15 55 6 16 17 32 15 49 59 -0.84 -108 0 0 16 25 36 10 7 16.3 26 225 -32 16 34 17 16 16 56 16 39 27 16 11 48 -0.84 -107 0 0 16 48 4 10 7 11.9 25 226 -31 16 56 47 16 39 22 17 1 58 16 34 13 -0.84 -106 0 0 17 11 8 10 7 7.7 24 226 -30 17 19 53 17 2 24 17 25 6 16 57 13 -0.84 -105 0 0 17 34 47 10 7 3.7 23 226 -29 17 43 35 17 26 1 17 48 49 17 20 49 -0.84 -104 0 0 17 59 2 10 6 59.7 22 227 -28 18 7 52 17 50 14 18 13 7 17 45 1 -0.84 -103 0 0 18 23 52 10 6 56.0 21 227 -27 18 32 44 18 15 1 18 38 0 18 9 47 -0.84 -102 0 0 18 49 17 10 6 52.4 20 228 -26 18 58 11 18 40 23 19 3 29 18 35 8 -0.84 -101 0 0 19 15 16 10 6 48.9 19 228 -25 19 24 12 19 6 20 19 29 31 19 1 3 -0.84 -100 0 0 19 41 49 10 6 45.6 18 229 -24 19 50 48 19 32 51 19 56 8 19 27 32 -0.85 - 99 0 0 20 8 55 10 6 42.5 17 229 -23 20 17 57 19 59 55 20 23 19 19 54 35 -0.85 - 98 0 0 20 36 35 10 6 39.5 16 230 -22 20 45 39 20 27 32 20 51 3 20 22 11 -0.85 - 97 0 0 21 4 48 10 6 36.7 15 230 -21 21 13 55 20 55 42 21 19 19 20 50 20 -0.85 - 96 0 0 21 33 33 10 6 34.0 14 230 -20 21 42 42 21 24 25 21 48 8 21 19 0 -0.85 - 95 0 0 22 2 49 10 6 31.6 13 231 -19 22 12 1 21 53 39 22 17 29 21 48 13 -0.85 - 94 0 0 22 32 37 10 6 29.3 12 231 -18 22 41 51 22 23 24 22 47 21 22 17 56 -0.85 - 93 0 0 23 2 55 10 6 27.2 11 232 -17 23 12 12 22 53 39 23 17 43 22 48 10 -0.86 - 92 0 0 23 33 43 10 6 25.2 10 232 -16 23 43 3 23 24 24 23 48 35 23 18 54 -0.86 - 91 0 0 24 5 0 10 6 23.5 9 232 -15 24 14 22 23 55 38 24 19 57 23 50 6 -0.86 - 90 0 0 24 36 45 10 6 21.9 8 233 -14 24 46 10 24 27 21 24 51 46 24 21 47 -0.86 - 89 0 0 25 8 58 10 6 20.5 7 233 -13 25 18 26 24 59 31 25 24 4 24 53 56 -0.87 - 88 0 0 25 41 37 10 6 19.3 6 234 -12 25 51 8 25 32 8 25 56 48 25 26 31 -0.87 - 87 0 0 26 14 43 10 6 18.3 5 234 -10 26 24 17 26 5 11 26 29 58 25 59 32 -0.88 - 86 0 0 26 48 14 10 6 17.5 4 235 -9 26 57 50 26 38 39 27 3 33 26 32 59 -0.89 - 85 0 0 27 22 8 10 6 16.9 3 235 -8 27 31 48 27 12 31 27 37 32 27 6 49 -0.91 - 84 0 0 27 56 26 10 6 16.5 2 236 -7 28 6 8 27 46 46 28 11 54 27 41 2 -0.95 - 83 0 0 28 31 6 10 6 16.2 1 236 -6 28 40 51 28 21 23 28 46 38 28 15 38 -1.08 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 14.4 Data for the target star ------------------------ * name: UCAC4 306-095196 * constellation : Scorpius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 44 26.4489 DE: -28 56 13.965 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 44 26.4489 DE: -28 56 13.965 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.4 * B mag [mag]: 12.1 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1080) Orchis asteroid class: approx. diameter [km]: 23 approx. diameter ["]: 0.016 distance from Earth [AU]: 1.99790 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#44 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): 0.013", 0.005", 97.9° remarks: * orbital elements for (1080)Orchis : Mean anomaly = 204.3525884723 deg Arg. of pericenter = 57.0248336756 deg Long. of node = 1.9540929839 deg Inclination = 4.5865483062 deg Eccentricity = 0.2572358487 Semimajor axis = 2.4207166738 AU Perihelion dist = 1.7980215658 AU Mag: H = 12.33, G = 0.15 Epoch of elements : MJD 60466.42495954 TDT (2024 Jun 05.4250) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#442023Apr24,1.59,2024,6,5,10.199024,0.064175,0.629505,-8.137967,0.829606,0.000218,0.000624,0.000001,0.000000 -155.8177,-28.9836,26.67,22.62,False UCAC4 306-095196,16.74068025,-28.9372125,12.11,11.40,11.02,0.1,0,,16.76660164,-28.9835725,5.09,5.03,0,0,0 1080,Orchis,16.48,22.977,1.9979,0,0,-2.729,3.66,,1.2,0 0,204.2414,2024,6,5,57.0248,1.9541,4.5865,0.25724,2.42072,1.79802,12.33,5.0,0.15 1.297,0.0130,0.0047,98,0.0047,Known errors,1.07,0,-1,-1 20240605_095196,60139.37 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 08:54 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org