IOTA/IOTA-ES occultation update for (18) Melpomene / UCAC4 428-003543 event on 2023 Dec 01, 03:50 UT Visible from USA Summary ------- On 2023 Dec 01 UT, the 142.2 km diameter asteroid (18) Melpomene will occult a 12.2 mag star in the constellation Eridanus for observers along a path across USA. In the case of an occultation, the combined light of the asteroid and the star will drop by 0.04 mag to 8.76 mag (the magnitude of the asteroid) for at most 36.540 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: 100 * date and approx. time of event: 2023 Dec 01, 03:24 - 2023 Dec 01, 04:15 * geocentric midpoint of event [JD]: 2460279.65977067 * magnitude of target star: 12.20 * magnitude drop [mag]: 0.04 * estimated maximum duration [s]: 36.540 * Moon: 85 % sunlit, 78° distance * Sun: 145° distance * rough path description: USA Additional comments ------------------- low mag drop The occultation path -------------------- * approximate projected width [km]: 156 * 1 sigma uncertainty interval [path widths]: +/- 0.03 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.008", 0.006", 76°) * approx speed of asteroid's shadow [km/s]: 3.8917 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 428-003543 by 18 Melpomene on 2023 Dec 1 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 -174 0 0 55 29 49 4 14 54.3 0 98 -8 56 12 37 54 47 17 56 15 37 54 44 18 .... -173 0 0 55 24 54 4 14 54.1 1 99 -9 56 7 45 54 42 16 56 10 45 54 39 18 -0.27 -172 0 0 55 19 37 4 14 53.7 2 100 -9 56 2 33 54 36 55 56 5 34 54 33 56 -0.34 -171 0 0 55 13 59 4 14 53.1 2 101 -10 55 57 0 54 31 12 56 0 1 54 28 13 -0.37 -170 0 0 55 8 0 4 14 52.4 3 101 -10 55 51 6 54 25 8 55 54 7 54 22 9 -0.39 -169 0 0 55 1 40 4 14 51.5 3 102 -11 55 44 51 54 18 43 55 47 53 54 15 43 -0.40 -168 0 0 54 54 58 4 14 50.3 4 103 -11 55 38 15 54 11 56 55 41 17 54 8 56 -0.41 -167 0 0 54 47 55 4 14 49.0 4 104 -12 55 31 18 54 4 47 55 34 20 54 1 47 -0.42 -166 0 0 54 40 31 4 14 47.5 5 105 -12 55 23 59 53 57 17 55 27 2 53 54 16 -0.42 -165 0 0 54 32 45 4 14 45.8 6 105 -13 55 16 19 53 49 25 55 19 23 53 46 23 -0.43 -164 0 0 54 24 37 4 14 43.9 6 106 -13 55 8 18 53 41 11 55 11 22 53 38 9 -0.43 -163 0 0 54 16 7 4 14 41.8 7 107 -14 54 59 55 53 32 35 55 2 59 53 29 32 -0.44 -162 0 0 54 7 15 4 14 39.5 7 108 -14 54 51 10 53 23 36 54 54 15 53 20 34 -0.44 -161 0 0 53 58 2 4 14 37.0 8 109 -15 54 42 3 53 14 16 54 45 8 53 11 12 -0.44 -160 0 0 53 48 25 4 14 34.2 9 109 -15 54 32 34 53 4 32 54 35 40 53 1 29 -0.44 -159 0 0 53 38 27 4 14 31.3 9 110 -16 54 22 43 52 54 26 54 25 49 52 51 22 -0.45 -158 0 0 53 28 5 4 14 28.1 10 111 -16 54 12 29 52 43 58 54 15 36 52 40 53 -0.45 -157 0 0 53 17 21 4 14 24.7 10 112 -17 54 1 53 52 33 6 54 5 0 52 30 1 -0.45 -156 0 0 53 6 15 4 14 21.1 11 113 -17 53 50 54 52 21 52 53 54 2 52 18 46 -0.45 -155 0 0 52 54 45 4 14 17.3 12 113 -18 53 39 32 52 10 14 53 42 40 52 7 8 -0.45 -154 0 0 52 42 52 4 14 13.2 12 114 -18 53 27 47 51 58 13 53 30 56 51 55 6 -0.45 -153 0 0 52 30 35 4 14 8.9 13 115 -19 53 15 38 51 45 49 53 18 48 51 42 41 -0.46 -152 0 0 52 17 55 4 14 4.3 14 116 -20 53 3 7 51 33 1 53 6 17 51 29 53 -0.46 -151 0 0 52 4 52 4 13 59.5 14 117 -20 52 50 12 51 19 49 52 53 23 51 16 40 -0.46 -150 0 0 51 51 24 4 13 54.5 15 117 -21 52 36 53 51 6 13 52 40 5 51 3 4 -0.46 -149 0 0 51 37 33 4 13 49.2 15 118 -21 52 23 11 50 52 13 52 26 23 50 49 3 -0.46 -148 0 0 51 23 18 4 13 43.6 16 119 -22 52 9 4 50 37 49 52 12 17 50 34 39 -0.46 -147 0 0 51 8 38 4 13 37.8 17 120 -22 51 54 33 50 23 1 51 57 47 50 19 50 -0.46 -146 0 0 50 53 34 4 13 31.7 17 121 -23 51 39 38 50 7 48 51 42 52 50 4 37 -0.46 -145 0 0 50 38 6 4 13 25.3 18 121 -24 51 24 19 49 52 11 51 27 34 49 48 59 -0.46 -144 0 0 50 22 13 4 13 18.6 19 122 -24 51 8 35 49 36 9 51 11 50 49 32 56 -0.47 -143 0 0 50 5 55 4 13 11.6 19 123 -25 50 52 26 49 19 42 50 55 42 49 16 29 -0.47 -142 0 0 49 49 12 4 13 4.4 20 124 -25 50 35 53 49 2 51 50 39 9 48 59 37 -0.47 -141 0 0 49 32 5 4 12 56.9 21 124 -26 50 18 54 48 45 34 50 22 11 48 42 20 -0.47 -140 0 0 49 14 32 4 12 49.0 21 125 -27 50 1 31 48 27 53 50 4 49 48 24 38 -0.47 -139 0 0 48 56 34 4 12 40.8 22 126 -27 49 43 42 48 9 46 49 47 1 48 6 30 -0.47 -138 0 0 48 38 11 4 12 32.4 23 127 -28 49 25 28 47 51 14 49 28 47 47 47 58 -0.47 -137 0 0 48 19 23 4 12 23.6 24 128 -28 49 6 49 47 32 17 49 10 9 47 29 0 -0.47 -136 0 0 48 0 10 4 12 14.5 24 128 -29 48 47 45 47 12 55 48 51 5 47 9 37 -0.47 -135 0 0 47 40 31 4 12 5.0 25 129 -30 48 28 15 46 53 7 48 31 36 46 49 49 -0.47 -134 0 0 47 20 27 4 11 55.2 26 130 -30 48 8 19 46 32 54 48 11 41 46 29 36 -0.47 -133 0 0 46 59 57 4 11 45.1 26 131 -31 47 47 59 46 12 16 47 51 21 46 8 57 -0.47 -132 0 0 46 39 2 4 11 34.6 27 131 -32 47 27 12 45 51 13 47 30 35 45 47 53 -0.47 -131 0 0 46 17 42 4 11 23.8 28 132 -32 47 6 1 45 29 44 47 9 24 45 26 24 -0.48 -130 0 0 45 55 56 4 11 12.6 29 133 -33 46 44 24 45 7 51 46 47 48 45 4 30 -0.48 -129 0 0 45 33 46 4 11 1.1 29 134 -34 46 22 21 44 45 32 46 25 46 44 42 10 -0.48 -128 0 0 45 11 10 4 10 49.2 30 135 -34 45 59 54 44 22 48 46 3 19 44 19 26 -0.48 -127 0 0 44 48 9 4 10 36.9 31 135 -35 45 37 1 43 59 40 45 40 27 43 56 17 -0.48 -126 0 0 44 24 44 4 10 24.2 32 136 -36 45 13 43 43 36 7 45 17 10 43 32 43 -0.48 -125 0 0 44 0 53 4 10 11.2 32 137 -36 44 50 0 43 12 9 44 53 28 43 8 45 -0.48 -124 0 0 43 36 38 4 9 57.8 33 138 -37 44 25 53 42 47 47 44 29 21 42 44 22 -0.48 -123 0 0 43 11 59 4 9 44.0 34 139 -38 44 1 21 42 23 0 44 4 49 42 19 36 -0.48 -122 0 0 42 46 56 4 9 29.8 35 139 -39 43 36 24 41 57 50 43 39 53 41 54 25 -0.48 -121 0 0 42 21 28 4 9 15.2 35 140 -39 43 11 4 41 32 17 43 14 33 41 28 51 -0.48 -120 0 0 41 55 38 4 9 0.2 36 141 -40 42 45 20 41 6 20 42 48 49 41 2 54 -0.48 -119 0 0 41 29 24 4 8 44.8 37 142 -41 42 19 12 40 40 0 42 22 42 40 36 33 -0.48 -118 0 0 41 2 46 4 8 29.0 38 143 -42 41 52 40 40 13 17 41 56 11 40 9 50 -0.48 -117 0 0 40 35 47 4 8 12.8 38 143 -42 41 25 46 39 46 12 41 29 17 39 42 44 -0.48 -116 0 0 40 8 25 4 7 56.2 39 144 -43 40 58 30 39 18 45 41 2 1 39 15 17 -0.48 -115 0 0 39 40 41 4 7 39.2 40 145 -44 40 30 51 38 50 56 40 34 23 38 47 28 -0.48 -114 0 0 39 12 36 4 7 21.8 41 146 -45 40 2 50 38 22 46 40 6 22 38 19 18 -0.48 -113 0 0 38 44 10 4 7 4.0 42 147 -45 39 34 29 37 54 16 39 38 1 37 50 47 -0.48 -112 0 0 38 15 23 4 6 45.8 42 148 -46 39 5 46 37 25 25 39 9 18 37 21 56 -0.48 -111 0 0 37 46 16 4 6 27.2 43 149 -47 38 36 43 36 56 15 38 40 16 36 52 46 -0.48 -110 0 0 37 16 50 4 6 8.1 44 150 -48 38 7 20 36 26 45 38 10 53 36 23 16 -0.48 -109 0 0 36 47 5 4 5 48.7 45 151 -49 37 37 38 35 56 57 37 41 11 35 53 28 -0.48 -108 0 0 36 17 1 4 5 28.9 46 152 -49 37 7 37 35 26 51 37 11 11 35 23 22 -0.48 -107 0 0 35 46 40 4 5 8.6 46 153 -50 36 37 18 34 56 28 36 40 52 34 52 58 -0.48 -106 0 0 35 16 2 4 4 48.0 47 154 -51 36 6 42 34 25 48 36 10 15 34 22 18 -0.48 -105 0 0 34 45 7 4 4 27.0 48 155 -52 35 35 49 33 54 51 35 39 22 33 51 21 -0.48 -104 0 0 34 13 56 4 4 5.6 49 156 -53 35 4 39 33 23 39 35 8 13 33 20 9 -0.48 -103 0 0 33 42 30 4 3 43.8 50 157 -53 34 33 14 32 52 12 34 36 48 32 48 42 -0.48 -102 0 0 33 10 50 4 3 21.7 50 158 -54 34 1 34 32 20 32 34 5 8 32 17 1 -0.48 -101 0 0 32 38 56 4 2 59.2 51 159 -55 33 29 40 31 48 37 33 33 14 31 45 7 -0.48 -100 0 0 32 6 49 4 2 36.3 52 160 -56 32 57 33 31 16 30 33 1 7 31 13 0 -0.48 - 99 0 0 31 34 29 4 2 13.0 53 161 -57 32 25 13 30 44 11 32 28 47 30 40 41 -0.48 - 98 0 0 31 1 58 4 1 49.5 53 162 -58 31 52 41 30 11 41 31 56 15 30 8 11 -0.48 - 97 0 0 30 29 16 4 1 25.5 54 164 -58 31 19 58 29 39 0 31 23 32 29 35 30 -0.47 - 96 0 0 29 56 25 4 1 1.3 55 165 -59 30 47 5 29 6 10 30 50 39 29 2 40 -0.47 - 95 0 0 29 23 24 4 0 36.7 56 166 -60 30 14 2 28 33 11 30 17 36 28 29 41 -0.47 - 94 0 0 28 50 14 4 0 11.8 56 168 -61 29 40 51 28 0 3 29 44 24 27 56 34 -0.47 - 93 0 0 28 16 57 3 59 46.6 57 169 -62 29 7 31 27 26 49 29 11 5 27 23 19 -0.47 - 92 0 0 27 43 34 3 59 21.1 58 171 -63 28 34 5 26 53 28 28 37 38 26 49 59 -0.47 - 91 0 0 27 10 4 3 58 55.4 58 172 -64 28 0 32 26 20 1 28 4 5 26 16 32 -0.47 - 90 0 0 26 36 29 3 58 29.3 59 174 -64 27 26 54 25 46 30 27 30 27 25 43 1 -0.47 - 89 0 0 26 2 50 3 58 3.0 60 175 -65 26 53 12 25 12 54 26 56 44 25 9 26 -0.47 - 88 0 0 25 29 8 3 57 36.5 60 177 -66 26 19 25 24 39 15 26 22 57 24 35 47 -0.47 - 87 0 0 24 55 23 3 57 9.7 61 179 -67 25 45 36 24 5 34 25 49 8 24 2 6 -0.47 - 86 0 0 24 21 36 3 56 42.7 61 181 -68 25 11 45 23 31 52 25 15 16 23 28 24 -0.47 - 85 0 0 23 47 48 3 56 15.5 62 183 -69 24 37 52 22 58 8 24 41 23 22 54 41 -0.46 - 84 0 0 23 14 0 3 55 48.1 62 185 -69 24 3 59 22 24 25 24 7 30 22 20 58 -0.46 - 83 0 0 22 40 13 3 55 20.5 63 187 -70 23 30 7 21 50 43 23 33 37 21 47 16 -0.46 - 82 0 0 22 6 27 3 54 52.8 63 189 -71 22 56 16 21 17 2 22 59 46 21 13 35 -0.46 - 81 0 0 21 32 43 3 54 24.9 64 191 -72 22 22 27 20 43 24 22 25 57 20 39 58 -0.46 - 80 0 0 20 59 3 3 53 56.8 64 193 -72 21 48 41 20 9 49 21 52 10 20 6 23 -0.46 - 79 0 0 20 25 27 3 53 28.7 65 195 -73 21 14 58 19 36 18 21 18 27 19 32 53 -0.46 - 78 0 0 19 51 55 3 53 0.4 65 198 -74 20 41 21 19 2 52 20 44 49 18 59 27 -0.46 - 77 0 0 19 18 29 3 52 32.0 65 200 -75 20 7 48 18 29 32 20 11 16 18 26 7 -0.46 - 76 0 0 18 45 9 3 52 3.5 65 202 -75 19 34 22 17 56 18 19 37 49 17 52 54 -0.46 - 75 0 0 18 11 56 3 51 35.0 65 205 -76 19 1 2 17 23 11 19 4 29 17 19 48 -0.45 - 74 0 0 17 38 50 3 51 6.3 66 207 -77 18 27 51 16 50 13 18 31 17 16 46 49 -0.45 - 73 0 0 17 5 54 3 50 37.7 66 210 -77 17 54 47 16 17 22 17 58 13 16 13 59 -0.45 - 72 0 0 16 33 6 3 50 9.0 66 212 -78 17 21 53 15 44 42 17 25 18 15 41 19 -0.45 - 71 0 0 16 0 29 3 49 40.3 66 215 -78 16 49 8 15 12 11 16 52 33 15 8 49 -0.45 - 70 0 0 15 28 2 3 49 11.6 66 217 -79 16 16 34 14 39 51 16 19 59 14 36 29 -0.45 - 69 0 0 14 55 46 3 48 43.0 66 220 -79 15 44 12 14 7 42 15 47 36 14 4 21 -0.45 - 68 0 0 14 23 43 3 48 14.3 65 222 -79 15 12 1 13 35 46 15 15 25 13 32 25 -0.45 - 67 0 0 13 51 52 3 47 45.7 65 224 -79 14 40 3 13 4 2 14 43 26 13 0 42 -0.45 - 66 0 0 13 20 15 3 47 17.1 65 227 -79 14 8 18 12 32 32 14 11 41 12 29 12 -0.44 - 65 0 0 12 48 51 3 46 48.6 65 229 -80 13 36 47 12 1 15 13 40 9 11 57 56 -0.44 - 64 0 0 12 17 42 3 46 20.2 64 231 -79 13 5 31 11 30 14 13 8 52 11 26 55 -0.44 - 63 0 0 11 46 49 3 45 51.9 64 233 -79 12 34 30 10 59 27 12 37 50 10 56 9 -0.44 - 62 0 0 11 16 11 3 45 23.7 64 235 -79 12 3 44 10 28 57 12 7 5 10 25 39 -0.44 - 61 0 0 10 45 49 3 44 55.6 63 237 -79 11 33 15 9 58 43 11 36 35 9 55 26 -0.44 - 60 0 0 10 15 45 3 44 27.6 63 239 -78 11 3 3 9 28 46 11 6 22 9 25 29 -0.44 - 59 0 0 9 45 58 3 43 59.8 62 241 -78 10 33 8 8 59 6 10 36 27 8 55 50 -0.44 - 58 0 0 9 16 29 3 43 32.1 62 243 -77 10 3 32 8 29 44 10 6 50 8 26 29 -0.44 - 57 0 0 8 47 18 3 43 4.7 61 244 -77 9 34 14 8 0 41 9 37 31 7 57 26 -0.44 - 56 0 0 8 18 27 3 42 37.3 60 246 -76 9 5 15 7 31 57 9 8 32 7 28 43 -0.44 - 55 0 0 7 49 55 3 42 10.2 60 247 -76 8 36 36 7 3 33 8 39 52 7 0 19 -0.43 - 54 0 0 7 21 43 3 41 43.3 59 249 -75 8 8 16 6 35 29 8 11 32 6 32 15 -0.43 - 53 0 0 6 53 52 3 41 16.6 59 250 -74 7 40 17 6 7 45 7 43 33 6 4 32 -0.43 - 52 0 0 6 26 22 3 40 50.1 58 251 -74 7 12 40 5 40 22 7 15 55 5 37 9 -0.43 - 51 0 0 5 59 13 3 40 23.8 57 253 -73 6 45 23 5 13 20 6 48 38 5 10 8 -0.43 - 50 0 0 5 32 26 3 39 57.8 56 254 -72 6 18 29 4 46 41 6 21 43 4 43 29 -0.43 - 49 0 0 5 6 1 3 39 32.0 56 255 -71 5 51 57 4 20 23 5 55 10 4 17 12 -0.43 - 48 0 0 4 39 59 3 39 6.5 55 256 -71 5 25 48 3 54 28 5 29 1 3 51 18 -0.43 - 47 0 0 4 14 20 3 38 41.2 54 257 -70 5 0 1 3 28 56 5 3 14 3 25 46 -0.43 - 46 0 0 3 49 5 3 38 16.2 53 258 -69 4 34 39 3 3 48 4 37 50 3 0 38 -0.43 - 45 0 0 3 24 13 3 37 51.6 53 258 -68 4 9 40 2 39 3 4 12 51 2 35 54 -0.43 - 44 0 0 2 59 45 3 37 27.2 52 259 -67 3 45 5 2 14 42 3 48 16 2 11 34 -0.43 - 43 0 0 2 35 42 3 37 3.1 51 260 -66 3 20 55 1 50 46 3 24 5 1 47 38 -0.43 - 42 0 0 2 12 4 3 36 39.3 50 261 -66 2 57 10 1 27 14 3 0 20 1 24 7 -0.43 - 41 0 0 1 48 51 3 36 15.8 49 261 -65 2 33 50 1 4 8 2 36 59 1 1 1 -0.43 - 40 0 0 1 26 3 3 35 52.7 49 262 -64 2 10 55 0 41 27 2 14 4 0 38 20 -0.43 - 39 0 0 1 3 41 3 35 29.9 48 262 -63 1 48 27 0 19 11 1 51 35 0 16 5 -0.43 - 38 0 0 0 41 45 3 35 7.4 47 263 -62 1 26 24 - 0 2 38 1 29 32 - 0 5 44 -0.43 - 37 0 0 0 20 16 3 34 45.2 46 263 -61 1 4 48 - 0 24 2 1 7 56 - 0 27 7 -0.43 - 36 0 0 - 0 0 47 3 34 23.4 45 264 -61 0 43 39 - 0 44 58 0 46 46 - 0 48 3 -0.43 - 35 0 0 - 0 21 24 3 34 2.0 44 264 -60 0 22 56 - 1 5 28 0 26 3 - 1 8 33 -0.43 - 34 0 0 - 0 41 33 3 33 40.9 43 265 -59 0 2 41 - 1 25 31 0 5 48 - 1 28 35 -0.43 - 33 0 0 - 1 1 14 3 33 20.2 42 265 -58 - 0 17 6 - 1 45 7 - 0 14 0 - 1 48 11 -0.43 - 32 0 0 - 1 20 28 3 32 59.9 42 265 -57 - 0 36 26 - 2 4 15 - 0 33 21 - 2 7 19 -0.43 - 31 0 0 - 1 39 14 3 32 39.9 41 266 -56 - 0 55 18 - 2 22 56 - 0 52 13 - 2 25 59 -0.43 - 30 0 0 - 1 57 32 3 32 20.3 40 266 -55 - 1 13 42 - 2 41 8 - 1 10 37 - 2 44 11 -0.43 - 29 0 0 - 2 15 22 3 32 1.1 39 266 -54 - 1 31 37 - 2 58 53 - 1 28 33 - 3 1 55 -0.43 - 28 0 0 - 2 32 44 3 31 42.3 38 267 -54 - 1 49 4 - 3 16 9 - 1 46 0 - 3 19 11 -0.43 - 27 0 0 - 2 49 36 3 31 23.9 37 267 -53 - 2 6 1 - 3 32 57 - 2 2 58 - 3 35 58 -0.43 - 26 0 0 - 3 6 0 3 31 5.9 36 267 -52 - 2 22 30 - 3 49 15 - 2 19 27 - 3 52 16 -0.43 - 25 0 0 - 3 21 55 3 30 48.3 35 267 -51 - 2 38 30 - 4 5 5 - 2 35 27 - 4 8 6 -0.43 - 24 0 0 - 3 37 20 3 30 31.1 34 267 -50 - 2 54 0 - 4 20 26 - 2 50 57 - 4 23 26 -0.43 - 23 0 0 - 3 52 16 3 30 14.3 33 267 -49 - 3 9 0 - 4 35 17 - 3 5 58 - 4 38 17 -0.43 - 22 0 0 - 4 6 42 3 29 57.9 33 267 -48 - 3 23 31 - 4 49 39 - 3 20 29 - 4 52 39 -0.43 - 21 0 0 - 4 20 38 3 29 41.9 32 268 -48 - 3 37 31 - 5 3 31 - 3 34 30 - 5 6 30 -0.43 - 20 0 0 - 4 34 5 3 29 26.4 31 268 -47 - 3 51 2 - 5 16 53 - 3 48 1 - 5 19 52 -0.43 - 19 0 0 - 4 47 1 3 29 11.3 30 268 -46 - 4 4 2 - 5 29 45 - 4 1 1 - 5 32 44 -0.43 - 18 0 0 - 4 59 26 3 28 56.6 29 268 -45 - 4 16 31 - 5 42 7 - 4 13 31 - 5 45 6 -0.44 - 17 0 0 - 5 11 21 3 28 42.3 28 268 -44 - 4 28 30 - 5 53 59 - 4 25 30 - 5 56 57 -0.44 - 16 0 0 - 5 22 46 3 28 28.5 27 268 -43 - 4 39 58 - 6 5 20 - 4 36 58 - 6 8 18 -0.44 - 15 0 0 - 5 33 39 3 28 15.1 26 268 -42 - 4 50 55 - 6 16 10 - 4 47 55 - 6 19 8 -0.44 - 14 0 0 - 5 44 2 3 28 2.1 25 268 -42 - 5 1 20 - 6 26 30 - 4 58 20 - 6 29 27 -0.44 - 13 0 0 - 5 53 53 3 27 49.6 24 268 -41 - 5 11 14 - 6 36 18 - 5 8 15 - 6 39 16 -0.44 - 12 0 0 - 6 3 13 3 27 37.5 23 268 -40 - 5 20 37 - 6 45 35 - 5 17 37 - 6 48 33 -0.44 - 11 0 0 - 6 12 1 3 27 25.9 22 268 -39 - 5 29 27 - 6 54 21 - 5 26 28 - 6 57 18 -0.44 - 10 0 0 - 6 20 18 3 27 14.7 21 268 -38 - 5 37 46 - 7 2 35 - 5 34 47 - 7 5 32 -0.44 - 9 0 0 - 6 28 2 3 27 4.0 20 268 -37 - 5 45 33 - 7 10 18 - 5 42 34 - 7 13 15 -0.45 - 8 0 0 - 6 35 15 3 26 53.8 19 268 -36 - 5 52 47 - 7 17 28 - 5 49 48 - 7 20 25 -0.45 - 7 0 0 - 6 41 55 3 26 44.0 19 268 -36 - 5 59 29 - 7 24 7 - 5 56 30 - 7 27 4 -0.45 - 6 0 0 - 6 48 3 3 26 34.7 18 268 -35 - 6 5 38 - 7 30 13 - 6 2 39 - 7 33 10 -0.45 - 5 0 0 - 6 53 38 3 26 25.8 17 268 -34 - 6 11 14 - 7 35 47 - 6 8 16 - 7 38 44 -0.45 - 4 0 0 - 6 58 40 3 26 17.4 16 267 -33 - 6 16 18 - 7 40 49 - 6 13 19 - 7 43 45 -0.45 - 3 0 0 - 7 3 9 3 26 9.5 15 267 -32 - 6 20 48 - 7 45 17 - 6 17 49 - 7 48 14 -0.46 - 2 0 0 - 7 7 6 3 26 2.1 14 267 -31 - 6 24 44 - 7 49 13 - 6 21 46 - 7 52 9 -0.46 - 1 0 0 - 7 10 28 3 25 55.1 13 267 -30 - 6 28 7 - 7 52 36 - 6 25 9 - 7 55 32 -0.46 - 0 0 0 - 7 13 18 3 25 48.7 12 267 -29 - 6 30 57 - 7 55 25 - 6 27 58 - 7 58 21 -0.46 1 0 0 - 7 15 33 3 25 42.7 11 267 -29 - 6 33 12 - 7 57 40 - 6 30 14 - 8 0 37 -0.47 2 0 0 - 7 17 15 3 25 37.2 10 267 -28 - 6 34 53 - 7 59 22 - 6 31 55 - 8 2 19 -0.47 3 0 0 - 7 18 22 3 25 32.2 9 267 -27 - 6 36 0 - 8 0 30 - 6 33 1 - 8 3 27 -0.47 4 0 0 - 7 18 55 3 25 27.7 8 267 -26 - 6 36 32 - 8 1 4 - 6 33 33 - 8 4 1 -0.48 5 0 0 - 7 18 53 3 25 23.8 7 267 -25 - 6 36 29 - 8 1 4 - 6 33 30 - 8 4 0 -0.48 6 0 0 - 7 18 17 3 25 20.3 6 266 -24 - 6 35 51 - 8 0 28 - 6 32 52 - 8 3 25 -0.49 7 0 0 - 7 17 5 3 25 17.3 5 266 -23 - 6 34 38 - 7 59 19 - 6 31 39 - 8 2 15 -0.49 8 0 0 - 7 15 18 3 25 14.9 4 266 -23 - 6 32 49 - 7 57 34 - 6 29 50 - 8 0 31 -0.51 9 0 0 - 7 12 56 3 25 13.0 3 266 -22 - 6 30 24 - 7 55 14 - 6 27 25 - 7 58 11 -0.52 10 0 0 - 7 9 58 3 25 11.6 2 266 -21 - 6 27 23 - 7 52 18 - 6 24 24 - 7 55 15 -0.56 11 0 0 - 7 6 24 3 25 10.7 1 266 -20 - 6 23 46 - 7 48 46 - 6 20 47 - 7 51 44 -0.64 12 0 0 - 7 2 13 3 25 10.4 0 266 -19 - 6 19 33 - 7 44 39 - 6 16 33 - 7 47 37 -2.47 Uncertainty in time = +/- 1 secs Prediction of 2023 Oct 15.9 Data for the target star ------------------------ * name: UCAC4 428-003543 * constellation : Eridanus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 02 49 11.9937 DE: -04 24 02.215 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 02 49 11.9937 DE: -04 24 02.216 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 12.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (18) Melpomene asteroid class: ShapeModel approx. diameter [km]: 142 approx. diameter ["]: 0.204 distance from Earth [AU]: 0.96240 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#128 date of fit: 2023 Oct 09 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): 0.008", 0.006", 76.283° remarks: * orbital elements for (18)Melpomene : Mean anomaly = 22.8402579637 deg Arg. of pericenter = 228.1357801447 deg Long. of node = 150.3483484103 deg Inclination = 10.1310067888 deg Eccentricity = 0.2184219662 Semimajor axis = 2.2958926496 AU Perihelion dist = 1.7944192629 AU Mag: H = 6.34, G = 0.25 Epoch of elements : MJD 60279.16000000 TDT (2023 Dec 01.1600) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1282023Oct09,36.54,2023,12,1,3.834496,0.213118,0.350869,-1.877428,1.140311,0.001990,0.002266,0.000001,0.000000 -84.6677,-4.3009,119.68,-21.75,False UCAC4 428-003543,2.81999827,-4.4006152,0.00,12.20,0.00,0.0,0,,2.84019404,-4.3008704,0.04,0.00,0,0,0 18,Melpomene,8.76,142.200,0.9624,0,0,-1.145,10.43,,8.0,0 0,22.7949,2023,12,1,228.1358,150.3483,10.1310,0.21842,2.29589,1.79442,6.57,5.0,0.15 1.035,0.0083,0.0057,76,0.0101,Known errors,-1.00,0,-1,-1 20231201_003543,60232.88 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Oct 15, 21:11 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org