IOTA/IOTA-ES occultation update for (688) Melanie / UCAC4 380-159953 event on 2024 Oct 07, 05:32 UT Visible from Summary ------- On 2024 Oct 07 UT, the 44.1315536419502 km diameter asteroid (688) Melanie will occult a 10.7 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 4.38 mag to 15.09 mag (the magnitude of the asteroid) for at most 4.350 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 Oct 07, 05:27 - 2024 Oct 07, 05:37 * geocentric midpoint of event [JD]: 2460590.73072346 * magnitude of target star: 10.73 * magnitude drop [mag]: 4.38 * estimated maximum duration [s]: 4.350 * Moon: 17 % sunlit, 63° distance * Sun: 111° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 96 * 1 sigma uncertainty interval [path widths]: +/- 0.16 * 1 sigma uncertainty interval [seconds]: +/- 1.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.012, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.012", 0.002", 82°) * approx speed of asteroid's shadow [km/s]: 10.1784 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 380-159953 by 688 Melanie on 2024 Oct 7 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 170 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. 72 26 37 .. .. .. .... 171 0 0 .. .. .... .. .. .. .. .. .. 72 15 51 .. .. .. 72 2 32 .. .. .. .... 172 0 0 72 34 44 5 27 30.8 0 145 -2 71 51 14 .. .. .. 71 37 56 .. .. .. .... 173 0 0 72 9 33 5 27 30.9 1 145 -2 71 26 6 72 54 55 71 12 49 .. .. .. -0.99 174 0 0 71 43 50 5 27 31.2 1 146 -2 71 0 28 72 29 7 70 47 12 72 43 46 -1.35 175 0 0 71 17 36 5 27 31.5 2 147 -2 70 34 20 72 2 45 70 21 7 72 17 22 -1.51 176 0 0 70 50 52 5 27 32.0 2 148 -2 70 7 44 71 35 53 69 54 33 71 50 27 -1.61 177 0 0 70 23 40 5 27 32.6 3 149 -3 69 40 41 71 8 31 69 27 32 71 23 1 -1.66 178 0 0 69 56 0 5 27 33.4 4 150 -3 69 13 10 70 40 39 69 0 5 70 55 5 -1.70 179 0 0 69 27 53 5 27 34.3 4 151 -3 68 45 15 70 12 20 68 32 12 70 26 42 -1.73 -180 0 0 68 59 22 5 27 35.4 5 152 -3 68 16 56 69 43 34 68 3 57 69 57 52 -1.76 -179 0 0 68 30 26 5 27 36.7 5 153 -4 67 48 14 69 14 24 67 35 19 69 28 36 -1.78 -178 0 0 68 1 9 5 27 38.1 6 154 -4 67 19 11 68 44 50 67 6 20 68 58 57 -1.79 -177 0 0 67 31 30 5 27 39.7 7 155 -4 66 49 48 68 14 54 66 37 1 68 28 55 -1.80 -176 0 0 67 1 33 5 27 41.5 7 156 -5 66 20 6 67 44 39 66 7 24 67 58 33 -1.81 -175 0 0 66 31 17 5 27 43.5 8 157 -5 65 50 7 67 14 4 65 37 30 67 27 52 -1.82 -174 0 0 66 0 46 5 27 45.7 8 158 -6 65 19 53 66 43 13 65 7 21 66 56 55 -1.83 -173 0 0 65 30 0 5 27 48.1 9 159 -6 64 49 26 66 12 7 64 36 59 66 25 42 -1.84 -172 0 0 64 59 1 5 27 50.7 10 160 -6 64 18 46 65 40 48 64 6 24 65 54 15 -1.84 -171 0 0 64 27 52 5 27 53.5 10 161 -7 63 47 55 65 9 17 63 35 39 65 22 37 -1.85 -170 0 0 63 56 33 5 27 56.5 11 162 -7 63 16 56 64 37 36 63 4 45 64 50 49 -1.85 -169 0 0 63 25 7 5 27 59.7 12 163 -8 62 45 49 64 5 48 62 33 44 64 18 53 -1.86 -168 0 0 62 53 34 5 28 3.2 12 164 -8 62 14 36 63 33 53 62 2 38 63 46 51 -1.86 -167 0 0 62 21 57 5 28 6.8 13 165 -9 61 43 20 63 1 54 61 31 28 63 14 44 -1.86 -166 0 0 61 50 18 5 28 10.7 14 166 -9 61 12 1 62 29 52 61 0 15 62 42 35 -1.87 -165 0 0 61 18 38 5 28 14.8 14 166 -10 60 40 42 61 57 50 60 29 1 62 10 25 -1.87 -164 0 0 60 46 59 5 28 19.1 15 167 -10 60 9 23 61 25 48 59 57 49 61 38 15 -1.87 -163 0 0 60 15 23 5 28 23.7 15 168 -11 59 38 8 60 53 49 59 26 39 61 6 9 -1.88 -162 0 0 59 43 51 5 28 28.4 16 169 -12 59 6 56 60 21 54 58 55 34 60 34 6 -1.88 -161 0 0 59 12 24 5 28 33.4 17 170 -12 58 35 50 59 50 5 58 24 33 60 2 10 -1.88 -160 0 0 58 41 5 5 28 38.5 17 171 -13 58 4 51 59 18 24 57 53 41 59 30 21 -1.89 -159 0 0 58 9 55 5 28 43.9 18 173 -13 57 34 1 58 46 51 57 22 57 58 58 41 -1.89 -158 0 0 57 38 55 5 28 49.5 18 174 -14 57 3 21 58 15 30 56 52 22 58 27 12 -1.89 -157 0 0 57 8 7 5 28 55.3 19 175 -15 56 32 52 57 44 20 56 22 0 57 55 55 -1.89 -156 0 0 56 37 32 5 29 1.3 19 176 -15 56 2 37 57 13 24 55 51 51 57 24 52 -1.90 -155 0 0 56 7 12 5 29 7.4 20 177 -16 55 32 36 56 42 43 55 21 56 56 54 4 -1.90 -154 0 0 55 37 8 5 29 13.8 21 178 -17 55 2 52 56 12 18 54 52 16 56 23 33 -1.90 -153 0 0 55 7 21 5 29 20.3 21 179 -17 54 33 23 55 42 11 54 22 54 55 53 19 -1.90 -152 0 0 54 37 53 5 29 27.1 22 180 -18 54 4 13 55 12 23 53 53 49 55 23 25 -1.91 -151 0 0 54 8 44 5 29 33.9 22 181 -19 53 35 23 54 42 55 53 25 5 54 53 50 -1.91 -150 0 0 53 39 57 5 29 41.0 23 182 -19 53 6 54 54 13 49 52 56 40 54 24 37 -1.91 -149 0 0 53 11 32 5 29 48.2 23 183 -20 52 38 46 53 45 5 52 28 38 53 55 48 -1.91 -148 0 0 52 43 30 5 29 55.5 23 184 -21 52 11 1 53 16 45 52 0 58 53 27 22 -1.92 -147 0 0 52 15 53 5 30 3.0 24 185 -22 51 43 40 52 48 50 51 33 42 52 59 20 -1.92 -146 0 0 51 48 41 5 30 10.6 24 186 -22 51 16 45 52 21 21 51 6 51 52 31 45 -1.92 -145 0 0 51 21 55 5 30 18.4 25 188 -23 50 50 15 51 54 18 50 40 26 52 4 37 -1.92 -144 0 0 50 55 37 5 30 26.2 25 189 -24 50 24 12 51 27 43 50 14 28 51 37 56 -1.93 -143 0 0 50 29 47 5 30 34.2 25 190 -25 49 58 37 51 1 37 49 48 58 51 11 45 -1.93 -142 0 0 50 4 25 5 30 42.3 26 191 -26 49 33 30 50 36 0 49 23 56 50 46 3 -1.93 -141 0 0 49 39 34 5 30 50.4 26 192 -26 49 8 54 50 10 53 48 59 23 50 20 51 -1.93 -140 0 0 49 15 14 5 30 58.7 26 193 -27 48 44 47 49 46 18 48 35 21 49 56 11 -1.93 -139 0 0 48 51 24 5 31 7.0 26 194 -28 48 21 11 49 22 14 48 11 49 49 32 3 -1.94 -138 0 0 48 28 7 5 31 15.4 26 196 -29 47 58 7 48 58 43 47 48 49 49 8 27 -1.94 -137 0 0 48 5 23 5 31 23.8 27 197 -29 47 35 36 48 35 45 47 26 22 48 45 25 -1.94 -136 0 0 47 43 12 5 31 32.3 27 198 -30 47 13 37 48 13 21 47 4 27 48 22 57 -1.94 -135 0 0 47 21 35 5 31 40.9 27 199 -31 46 52 13 47 51 32 46 43 6 48 1 3 -1.94 -134 0 0 47 0 33 5 31 49.4 27 200 -32 46 31 22 47 30 17 46 22 19 47 39 45 -1.95 -133 0 0 46 40 6 5 31 58.0 27 201 -33 46 11 6 47 9 38 46 2 6 47 19 2 -1.95 -132 0 0 46 20 15 5 32 6.6 27 203 -33 45 51 25 46 49 35 45 42 29 46 58 55 -1.95 -131 0 0 46 0 59 5 32 15.2 27 204 -34 45 32 21 46 30 9 45 23 27 46 39 25 -1.95 -130 0 0 45 42 20 5 32 23.8 27 205 -35 45 13 52 46 11 20 45 5 1 46 20 32 -1.95 -129 0 0 45 24 19 5 32 32.4 27 206 -36 44 56 0 45 53 8 44 47 12 46 2 17 -1.96 -128 0 0 45 6 54 5 32 41.0 27 207 -36 44 38 45 45 35 33 44 30 0 45 44 39 -1.96 -127 0 0 44 50 8 5 32 49.5 27 208 -37 44 22 7 45 18 37 44 13 25 45 27 40 -1.96 -126 0 0 44 33 59 5 32 58.0 27 209 -38 44 6 7 45 2 20 43 57 28 45 11 20 -1.96 -125 0 0 44 18 29 5 33 6.5 27 210 -39 43 50 45 44 46 41 43 42 8 44 55 38 -1.96 -124 0 0 44 3 37 5 33 14.9 26 212 -39 43 36 1 44 31 41 43 27 27 44 40 35 -1.96 -123 0 0 43 49 24 5 33 23.2 26 213 -40 43 21 56 44 17 20 43 13 24 44 26 12 -1.96 -122 0 0 43 35 51 5 33 31.5 26 214 -41 43 8 29 44 3 39 43 0 0 44 12 28 -1.97 -121 0 0 43 22 56 5 33 39.7 26 215 -42 42 55 42 43 50 38 42 47 14 43 59 25 -1.97 -120 0 0 43 10 42 5 33 47.8 26 216 -42 42 43 34 43 38 16 42 35 8 43 47 1 -1.97 -119 0 0 42 59 7 5 33 55.8 25 217 -43 42 32 5 43 26 35 42 23 41 43 35 18 -1.97 -118 0 0 42 48 12 5 34 3.8 25 218 -44 42 21 16 43 15 34 42 12 54 43 24 15 -1.97 -117 0 0 42 37 57 5 34 11.6 25 219 -44 42 11 6 43 5 13 42 2 46 43 13 52 -1.97 -116 0 0 42 28 22 5 34 19.3 24 220 -45 42 1 37 42 55 33 41 53 18 43 4 10 -1.97 -115 0 0 42 19 27 5 34 26.9 24 221 -46 41 52 47 42 46 33 41 44 29 42 55 9 -1.97 -114 0 0 42 11 13 5 34 34.4 23 222 -46 41 44 37 42 38 14 41 36 21 42 46 48 -1.97 -113 0 0 42 3 39 5 34 41.7 23 223 -47 41 37 7 42 30 36 41 28 52 42 39 9 -1.97 -112 0 0 41 56 46 5 34 48.9 23 224 -47 41 30 17 42 23 38 41 22 4 42 32 10 -1.98 -111 0 0 41 50 32 5 34 56.0 22 225 -48 41 24 8 42 17 22 41 15 55 42 25 52 -1.98 -110 0 0 41 45 0 5 35 2.9 22 226 -49 41 18 38 42 11 46 41 10 26 42 20 15 -1.98 -109 0 0 41 40 8 5 35 9.7 21 227 -49 41 13 49 42 6 51 41 5 38 42 15 19 -1.98 -108 0 0 41 35 56 5 35 16.3 21 228 -50 41 9 40 42 2 37 41 1 30 42 11 4 -1.98 -107 0 0 41 32 25 5 35 22.7 20 228 -50 41 6 11 41 59 3 40 58 1 42 7 30 -1.98 -106 0 0 41 29 34 5 35 29.0 20 229 -50 41 3 22 41 56 10 40 55 13 42 4 37 -1.98 -105 0 0 41 27 24 5 35 35.1 19 230 -51 41 1 13 41 53 59 40 53 5 42 2 24 -1.98 -104 0 0 41 25 54 5 35 41.0 18 231 -51 40 59 45 41 52 27 40 51 37 42 0 53 -1.98 -103 0 0 41 25 4 5 35 46.7 18 232 -52 40 58 56 41 51 37 40 50 48 42 0 2 -1.98 -102 0 0 41 24 55 5 35 52.3 17 233 -52 40 58 47 41 51 26 40 50 39 41 59 51 -1.98 -101 0 0 41 25 25 5 35 57.6 17 233 -52 40 59 18 41 51 57 40 51 10 42 0 21 -1.98 -100 0 0 41 26 36 5 36 2.8 16 234 -53 41 0 28 41 53 7 40 52 21 42 1 32 -1.98 - 99 0 0 41 28 26 5 36 7.7 15 235 -53 41 2 18 41 54 58 40 54 11 42 3 23 -1.98 - 98 0 0 41 30 56 5 36 12.5 15 236 -53 41 4 48 41 57 29 40 56 40 42 5 54 -1.98 - 97 0 0 41 34 6 5 36 17.0 14 237 -53 41 7 56 42 0 39 40 59 48 42 9 4 -1.99 - 96 0 0 41 37 55 5 36 21.3 13 237 -53 41 11 44 42 4 30 41 3 36 42 12 55 -1.99 - 95 0 0 41 42 23 5 36 25.5 13 238 -53 41 16 11 42 9 0 41 8 2 42 17 26 -1.99 - 94 0 0 41 47 31 5 36 29.3 12 239 -53 41 21 17 42 14 9 41 13 7 42 22 36 -1.99 - 93 0 0 41 53 17 5 36 33.0 11 240 -54 41 27 1 42 19 58 41 18 51 42 28 26 -1.99 - 92 0 0 41 59 43 5 36 36.5 11 240 -54 41 33 24 42 26 26 41 25 13 42 34 54 -1.99 - 91 0 0 42 6 46 5 36 39.7 10 241 -54 41 40 25 42 33 33 41 32 13 42 42 2 -2.00 - 90 0 0 42 14 29 5 36 42.7 9 242 -53 41 48 4 42 41 18 41 39 51 42 49 49 -2.00 - 89 0 0 42 22 49 5 36 45.5 8 243 -53 41 56 20 42 49 42 41 48 7 42 58 14 -2.00 - 88 0 0 42 31 47 5 36 48.0 8 243 -53 42 5 15 42 58 44 41 57 0 43 7 17 -2.01 - 87 0 0 42 41 23 5 36 50.3 7 244 -53 42 14 47 43 8 24 42 6 30 43 16 59 -2.02 - 86 0 0 42 51 36 5 36 52.4 6 245 -53 42 24 56 43 18 42 42 16 38 43 27 18 -2.02 - 85 0 0 43 2 27 5 36 54.2 5 245 -53 42 35 41 43 29 38 42 27 22 43 38 15 -2.03 - 84 0 0 43 13 54 5 36 55.8 5 246 -52 42 47 4 43 41 10 42 38 43 43 49 50 -2.05 - 83 0 0 43 25 58 5 36 57.1 4 247 -52 42 59 2 43 53 20 42 50 40 44 2 1 -2.07 - 82 0 0 43 38 39 5 36 58.2 3 247 -52 43 11 37 44 6 6 43 3 13 44 14 49 -2.10 - 81 0 0 43 51 55 5 36 59.1 2 248 -52 43 24 48 44 19 29 43 16 22 44 28 14 -2.15 - 80 0 0 44 5 47 5 36 59.7 2 249 -51 43 38 33 44 33 28 43 30 6 44 42 15 -2.25 - 79 0 0 44 20 15 5 37 0.1 1 250 -51 43 52 54 44 48 2 43 44 25 44 56 52 -2.51 - 78 0 0 44 35 17 5 37 0.3 0 250 -50 44 7 50 .. .. .. 43 59 18 .. .. .. -5.53 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: UCAC4 380-159953 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 20 26 07.2826 DE: -14 00 13.177 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 20 26 07.2826 DE: -14 00 13.177 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.7 * B mag [mag]: 11.8 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (688) Melanie asteroid class: approx. diameter [km]: 44 approx. diameter ["]: 0.034 distance from Earth [AU]: 1.78480 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#95 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): 0.012", 0.002", 82.313° remarks: * orbital elements for (688)Melanie : Mean anomaly = 14.0052749165 deg Arg. of pericenter = 139.2076036307 deg Long. of node = 170.8172874456 deg Inclination = 10.2444123827 deg Eccentricity = 0.1380792826 Semimajor axis = 2.6980530866 AU Perihelion dist = 2.3255078521 AU Mag: H = 10.88, G = 0.15 Epoch of elements : MJD 60590.23072300 TDT (2024 Oct 07.2307) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#952023Apr24,4.35,2024,10,7,5.537363,0.254431,0.850930,5.503917,-1.646759,0.005099,0.001079,0.000000,0.000000 -152.5444,-13.9226,93.88,-5.70,False UCAC4 380-159953,20.43535631,-14.0036602,11.76,10.73,10.17,0.1,4,,20.45844108,-13.9226239,4.38,4.49,0,0,0 688,Melanie,15.09,44.261,1.7848,0,0,1.864,-8.11,,2.2,0 0,13.9540,2024,10,7,139.2076,170.8173,10.2444,0.13808,2.69805,2.32551,10.88,5.0,0.15 1.157,0.0120,0.0023,82,0.0054,Known errors,1.09,0,-1,-1 20241007_159953,60140.62 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 14:47 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org