IOTA/IOTA-ES occultation update for (56) Melete / UCAC4 407-062170 event on 2024 Jul 28, 01:17 UT Visible from Summary ------- On 2024 Jul 28 UT, the 110.955066052046 km diameter asteroid (56) Melete will occult a 11.0 mag star in the constellation Libra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 1.49 mag to 12.16 mag (the magnitude of the asteroid) for at most 12.090 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: 2024 Jul 28, 01:11 - 2024 Jul 28, 01:23 * geocentric midpoint of event [JD]: 2460519.55373287 * magnitude of target star: 10.99 * magnitude drop [mag]: 1.49 * estimated maximum duration [s]: 12.090 * Moon: 50 % sunlit, 157° distance * Sun: 110° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 255 * 1 sigma uncertainty interval [path widths]: +/- 0.05 * 1 sigma uncertainty interval [seconds]: +/- 1.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.014", 0.002", 95°) * approx speed of asteroid's shadow [km/s]: 9.1876 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 407-062170 by 56 Melete on 2024 Jul 28 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 ' " Longitude Longitude Longitude Longitude - 88 12 16 81 0 0 1 12 25.2 0 181 16 - 95 24 58 - 80 40 33 - 96 8 26 - 79 52 56 .... - 88 6 31 80 0 0 1 12 25.5 1 181 15 - 94 36 48 - 81 20 46 - 95 16 2 - 80 38 9 -1.16 - 87 50 23 79 0 0 1 12 26.4 2 181 15 - 93 46 12 - 81 41 33 - 94 21 59 - 81 2 55 -1.57 - 87 26 26 78 0 0 1 12 27.7 3 181 15 - 92 53 45 - 81 47 53 - 93 26 41 - 81 12 29 -1.72 - 86 56 25 77 0 0 1 12 29.5 4 182 14 - 91 59 47 - 81 43 5 - 92 30 20 - 81 10 23 -1.80 - 86 21 31 76 0 0 1 12 31.9 5 182 14 - 91 4 35 - 81 29 32 - 91 33 5 - 80 59 6 -1.85 - 85 42 41 75 0 0 1 12 34.7 6 183 13 - 90 8 15 - 81 8 57 - 90 35 0 - 80 40 27 -1.89 - 85 0 29 74 0 0 1 12 38.1 7 184 12 - 89 10 56 - 80 42 31 - 89 36 9 - 80 15 41 -1.91 - 84 15 29 73 0 0 1 12 41.9 8 185 12 - 88 12 43 - 80 11 15 - 88 36 37 - 79 45 50 -1.93 - 83 28 2 72 0 0 1 12 46.3 9 185 11 - 87 13 39 - 79 35 47 - 87 36 23 - 79 11 38 -1.94 - 82 38 22 71 0 0 1 12 51.2 10 186 10 - 86 13 46 - 78 56 43 - 86 35 27 - 78 33 40 -1.96 - 81 46 45 70 0 0 1 12 56.6 11 187 10 - 85 13 3 - 78 14 26 - 85 33 50 - 77 52 22 -1.96 - 80 53 19 69 0 0 1 13 2.5 12 188 9 - 84 11 34 - 77 29 18 - 84 31 31 - 77 8 6 -1.97 - 79 58 12 68 0 0 1 13 9.0 13 189 8 - 83 9 14 - 76 41 34 - 83 28 28 - 76 21 7 -1.98 - 79 1 28 67 0 0 1 13 16.0 14 190 7 - 82 6 5 - 75 51 24 - 82 24 39 - 75 31 39 -1.99 - 78 3 11 66 0 0 1 13 23.5 15 191 6 - 81 2 2 - 74 58 59 - 81 20 2 - 74 39 50 -1.99 - 77 3 24 65 0 0 1 13 31.6 16 192 5 - 79 57 6 - 74 4 24 - 80 14 34 - 73 45 47 -2.00 - 76 2 5 64 0 0 1 13 40.2 17 193 4 - 78 51 13 - 73 7 43 - 79 8 13 - 72 49 35 -2.00 - 74 59 16 63 0 0 1 13 49.3 17 195 3 - 77 44 19 - 72 9 0 - 78 0 54 - 71 51 17 -2.01 - 73 54 55 62 0 0 1 13 59.0 18 196 2 - 76 36 21 - 71 8 15 - 76 52 34 - 70 50 54 -2.01 - 72 48 59 61 0 0 1 14 9.3 19 197 1 - 75 27 14 - 70 5 28 - 75 43 8 - 69 48 27 -2.02 - 71 41 25 60 0 0 1 14 20.1 20 198 0 - 74 16 54 - 69 0 38 - 74 32 30 - 68 43 53 -2.02 - 70 32 9 59 0 0 1 14 31.6 21 200 -1 - 73 5 14 - 67 53 40 - 73 20 36 - 67 37 9 -2.02 - 69 21 5 58 0 0 1 14 43.5 21 201 -2 - 71 52 10 - 66 44 31 - 72 7 19 - 66 28 11 -2.03 - 68 8 8 57 0 0 1 14 56.1 22 203 -3 - 70 37 34 - 65 33 5 - 70 52 32 - 65 16 53 -2.03 - 66 53 10 56 0 0 1 15 9.3 23 204 -4 - 69 21 18 - 64 19 12 - 69 36 8 - 64 3 7 -2.04 - 65 36 0 55 0 0 1 15 23.0 23 206 -6 - 68 3 13 - 63 2 44 - 68 17 57 - 62 46 42 -2.04 - 64 16 29 54 0 0 1 15 37.4 24 208 -7 - 66 43 10 - 61 43 29 - 66 57 50 - 61 27 28 -2.05 - 62 54 25 53 0 0 1 15 52.5 24 209 -8 - 65 20 56 - 60 21 14 - 65 35 34 - 60 5 11 -2.05 - 61 29 31 52 0 0 1 16 8.1 25 211 -10 - 63 56 19 - 58 55 41 - 64 10 57 - 58 39 31 -2.06 - 60 1 30 51 0 0 1 16 24.5 25 213 -11 - 62 29 1 - 57 26 27 - 62 43 43 - 57 10 8 -2.07 - 58 30 2 50 0 0 1 16 41.5 25 215 -12 - 60 58 46 - 55 53 9 - 61 13 33 - 55 36 36 -2.07 - 56 54 40 49 0 0 1 16 59.2 25 217 -14 - 59 25 12 - 54 15 13 - 59 40 8 - 53 58 21 -2.08 - 55 14 50 48 0 0 1 17 17.7 26 219 -15 - 57 47 53 - 52 31 58 - 58 3 1 - 52 14 42 -2.08 - 53 29 55 47 0 0 1 17 37.0 26 221 -17 - 56 6 15 - 50 42 33 - 56 21 41 - 50 24 44 -2.09 - 51 39 3 46 0 0 1 17 57.1 25 223 -18 - 54 19 40 - 48 45 49 - 54 35 28 - 48 27 16 -2.10 - 49 41 7 45 0 0 1 18 18.1 25 225 -20 - 52 27 18 - 46 40 10 - 52 43 35 - 46 20 40 -2.11 - 47 34 36 44 0 0 1 18 40.1 25 228 -22 - 50 28 3 - 44 23 22 - 50 44 57 - 44 2 35 -2.12 Latitude Latitude Latitude Latitude - 47 0 0 43 44 22 1 18 46.0 25 228 -22 42 24 24 45 9 10 42 16 29 45 18 8 -2.11 - 46 0 0 43 18 4 1 18 56.2 24 229 -23 41 58 58 44 41 49 41 51 8 44 50 40 -2.11 - 45 0 0 42 52 46 1 19 6.1 24 230 -24 41 34 30 44 15 32 41 26 44 44 24 16 -2.12 - 44 0 0 42 28 28 1 19 15.9 24 231 -24 41 11 0 43 50 18 41 3 18 43 58 56 -2.12 - 43 0 0 42 5 10 1 19 25.6 23 232 -25 40 48 26 43 26 7 40 40 49 43 34 39 -2.12 - 42 0 0 41 42 51 1 19 35.0 23 234 -26 40 26 50 43 2 59 40 19 17 43 11 26 -2.12 - 41 0 0 41 21 32 1 19 44.2 22 235 -26 40 6 11 42 40 53 39 58 41 42 49 15 -2.12 - 40 0 0 41 1 12 1 19 53.3 22 235 -27 39 46 29 42 19 49 39 39 3 42 28 6 -2.13 - 39 0 0 40 41 51 1 20 2.1 22 236 -28 39 27 43 41 59 47 39 20 21 42 7 59 -2.13 - 38 0 0 40 23 29 1 20 10.7 21 237 -28 39 9 55 41 40 46 39 2 35 41 48 53 -2.13 - 37 0 0 40 6 5 1 20 19.0 20 238 -29 38 53 3 41 22 46 38 45 46 41 30 49 -2.13 - 36 0 0 39 49 40 1 20 27.2 20 239 -29 38 37 7 41 5 46 38 29 53 41 13 45 -2.13 - 35 0 0 39 34 12 1 20 35.1 19 240 -30 38 22 7 40 49 46 38 14 56 40 57 42 -2.13 - 34 0 0 39 19 42 1 20 42.7 19 241 -30 38 8 3 40 34 46 38 0 55 40 42 39 -2.14 - 33 0 0 39 6 10 1 20 50.1 18 242 -31 37 54 55 40 20 46 37 47 49 40 28 36 -2.14 - 32 0 0 38 53 35 1 20 57.3 18 243 -31 37 42 43 40 7 45 37 35 39 40 15 32 -2.14 - 31 0 0 38 41 57 1 21 4.2 17 243 -31 37 31 26 39 55 44 37 24 24 40 3 28 -2.14 - 30 0 0 38 31 16 1 21 10.8 16 244 -32 37 21 4 39 44 40 37 14 4 39 52 22 -2.14 - 29 0 0 38 21 31 1 21 17.2 16 245 -32 37 11 37 39 34 36 37 4 38 39 42 15 -2.14 - 28 0 0 38 12 43 1 21 23.3 15 246 -32 37 3 5 39 25 29 36 56 8 39 33 6 -2.14 - 27 0 0 38 4 50 1 21 29.1 14 246 -33 36 55 27 39 17 20 36 48 32 39 24 55 -2.15 - 26 0 0 37 57 54 1 21 34.6 14 247 -33 36 48 44 39 10 8 36 41 50 39 17 42 -2.15 - 25 0 0 37 51 53 1 21 39.8 13 248 -33 36 42 55 39 3 54 36 36 1 39 11 27 -2.15 - 24 0 0 37 46 48 1 21 44.8 12 249 -33 36 37 59 38 58 37 36 31 7 39 6 8 -2.15 - 23 0 0 37 42 37 1 21 49.4 11 249 -33 36 33 58 38 54 17 36 27 7 39 1 47 -2.16 - 22 0 0 37 39 21 1 21 53.8 11 250 -34 36 30 50 38 50 53 36 23 59 38 58 22 -2.16 - 21 0 0 37 37 0 1 21 57.9 10 251 -34 36 28 35 38 48 25 36 21 45 38 55 53 -2.16 - 20 0 0 37 35 34 1 22 1.6 9 251 -34 36 27 13 38 46 53 36 20 23 38 54 21 -2.17 - 19 0 0 37 35 2 1 22 5.1 8 252 -34 36 26 44 38 46 17 36 19 55 38 53 44 -2.17 - 18 0 0 37 35 23 1 22 8.3 8 253 -34 36 27 8 38 46 36 36 20 18 38 54 3 -2.18 - 17 0 0 37 36 39 1 22 11.2 7 253 -34 36 28 24 38 47 51 36 21 35 38 55 18 -2.19 - 16 0 0 37 38 48 1 22 13.7 6 254 -34 36 30 32 38 50 1 36 23 43 38 57 28 -2.20 - 15 0 0 37 41 50 1 22 16.0 5 255 -33 36 33 32 38 53 6 36 26 43 39 0 33 -2.22 - 14 0 0 37 45 46 1 22 17.9 5 255 -33 36 37 25 38 57 5 36 30 35 39 4 33 -2.24 - 13 0 0 37 50 35 1 22 19.5 4 256 -33 36 42 9 39 1 59 36 35 19 39 9 28 -2.27 - 12 0 0 37 56 17 1 22 20.9 3 256 -33 36 47 45 39 7 48 36 40 54 39 15 17 -2.31 - 11 0 0 38 2 51 1 22 21.9 2 257 -33 36 54 11 39 14 31 36 47 20 39 22 1 -2.39 - 10 0 0 38 10 18 1 22 22.6 1 258 -32 37 1 30 39 22 8 36 54 38 39 29 39 -2.58 - 9 0 0 38 18 37 1 22 23.0 1 258 -32 37 9 39 39 30 38 37 2 46 39 38 11 -3.21 - 8 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. 37 11 45 .. .. .. .... Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 407-062170 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 15 40 59.3417 DE: -08 42 55.686 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 15 40 59.3416 DE: -08 42 55.685 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.0 * B mag [mag]: 11.6 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (56) Melete asteroid class: approx. diameter [km]: 111 approx. diameter ["]: 0.104 distance from Earth [AU]: 1.47440 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#129 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", 0.002", 94.937° remarks: * orbital elements for (56)Melete : Mean anomaly = 338.7803564827 deg Arg. of pericenter = 104.8947129711 deg Long. of node = 192.9382211184 deg Inclination = 8.0812324242 deg Eccentricity = 0.2371791814 Semimajor axis = 2.5973797520 AU Perihelion dist = 1.9813353487 AU Mag: H = 8.53, G = 0.15 Epoch of elements : MJD 60519.05373287 TDT (2024 Jul 28.0537) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1292023Apr24,12.09,2024,7,28,1.289589,0.387905,0.812115,4.679345,-2.235085,0.004612,-0.001422,0.000001,0.000000 -89.9685,-8.7945,162.29,18.90,False UCAC4 407-062170,15.68315050,-8.7154684,11.64,10.99,10.64,0.1,0,,15.70538407,-8.7945044,1.49,1.41,0,0,0 56,Melete,12.16,111.062,1.4744,0,0,1.884,-13.33,,5.6,0 0,338.5323,2024,7,27,104.8947,192.9382,8.0812,0.23718,2.59738,1.98134,8.52,5.0,0.15 1.051,0.0137,0.0024,95,0.0053,Known errors,1.02,0,-1,-1 20240728_062170,60140.22 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:19 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org