IOTA/IOTA-ES occultation update for (386) Siegena / UCAC4 467-108486 event on 2024 Jul 15, 14:21 UT Visible from Summary ------- On 2024 Jul 15 UT, the 178.498771374864 km diameter asteroid (386) Siegena will occult a 10.5 mag star in the constellation Aquila for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 1.71 mag to 11.96 mag (the magnitude of the asteroid) for at most 14.490 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 15, 14:15 - 2024 Jul 15, 14:27 * geocentric midpoint of event [JD]: 2460507.09834571 * magnitude of target star: 10.50 * magnitude drop [mag]: 1.71 * estimated maximum duration [s]: 14.490 * Moon: 66 % sunlit, 77° distance * Sun: 155° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 283 * 1 sigma uncertainty interval [path widths]: +/- 0.05 * 1 sigma uncertainty interval [seconds]: +/- 1.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.015, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.002", 89°) * approx speed of asteroid's shadow [km/s]: 12.3513 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 467-108486 by 386 Siegena on 2024 Jul 15 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 66 0 0 .. .. .... .. .. .. .. .. .. -72 50 29 .. .. .. -72 43 27 .. .. .. .... 67 0 0 -74 4 11 14 27 1.2 0 77 -24 -72 46 39 .. .. .. -72 39 37 .. .. .. .... 68 0 0 -74 0 21 14 27 1.1 1 76 -24 -72 42 37 -75 20 22 -72 35 33 -75 27 52 0.77 69 0 0 -73 56 18 14 27 1.1 1 75 -24 -72 38 22 -75 16 33 -72 31 17 -75 24 4 0.92 70 0 0 -73 52 3 14 27 1.0 1 74 -25 -72 33 54 -75 12 32 -72 26 49 -75 20 4 1.00 71 0 0 -73 47 36 14 27 0.9 1 73 -25 -72 29 14 -75 8 19 -72 22 7 -75 15 52 1.05 72 0 0 -73 42 56 14 27 0.8 2 72 -25 -72 24 20 -75 3 54 -72 17 12 -75 11 29 1.08 73 0 0 -73 38 4 14 27 0.7 2 71 -26 -72 19 13 -74 59 17 -72 12 4 -75 6 53 1.10 74 0 0 -73 32 58 14 27 0.5 2 70 -26 -72 13 53 -74 54 27 -72 6 43 -75 2 6 1.12 75 0 0 -73 27 40 14 27 0.4 3 69 -26 -72 8 19 -74 49 25 -72 1 7 -74 57 5 1.13 76 0 0 -73 22 8 14 27 0.2 3 68 -26 -72 2 32 -74 44 11 -71 55 19 -74 51 52 1.14 77 0 0 -73 16 22 14 26 59.9 3 67 -27 -71 56 30 -74 38 43 -71 49 16 -74 46 26 1.15 78 0 0 -73 10 24 14 26 59.7 3 66 -27 -71 50 14 -74 33 3 -71 42 58 -74 40 47 1.16 79 0 0 -73 4 11 14 26 59.4 4 65 -27 -71 43 44 -74 27 8 -71 36 27 -74 34 55 1.16 80 0 0 -72 57 44 14 26 59.1 4 65 -28 -71 37 0 -74 21 1 -71 29 41 -74 28 49 1.17 81 0 0 -72 51 3 14 26 58.8 4 64 -28 -71 30 1 -74 14 39 -71 22 40 -74 22 30 1.17 82 0 0 -72 44 7 14 26 58.4 5 63 -28 -71 22 46 -74 8 4 -71 15 24 -74 15 56 1.17 83 0 0 -72 36 56 14 26 58.0 5 62 -29 -71 15 17 -74 1 14 -71 7 53 -74 9 8 1.18 84 0 0 -72 29 30 14 26 57.6 5 61 -29 -71 7 32 -73 54 9 -71 0 6 -74 2 6 1.18 85 0 0 -72 21 50 14 26 57.1 6 60 -29 -70 59 31 -73 46 50 -70 52 4 -73 54 49 1.18 86 0 0 -72 13 53 14 26 56.7 6 59 -30 -70 51 15 -73 39 16 -70 43 46 -73 47 17 1.19 87 0 0 -72 5 41 14 26 56.1 6 58 -30 -70 42 42 -73 31 26 -70 35 11 -73 39 29 1.19 88 0 0 -71 57 13 14 26 55.6 7 57 -30 -70 33 53 -73 23 21 -70 26 20 -73 31 26 1.19 89 0 0 -71 48 28 14 26 55.0 7 56 -31 -70 24 47 -73 15 0 -70 17 13 -73 23 7 1.19 90 0 0 -71 39 27 14 26 54.4 7 55 -31 -70 15 25 -73 6 22 -70 7 48 -73 14 32 1.20 91 0 0 -71 30 9 14 26 53.7 8 54 -31 -70 5 45 -72 57 28 -69 58 6 -73 5 40 1.20 92 0 0 -71 20 33 14 26 53.0 8 53 -32 -69 55 47 -72 48 17 -69 48 7 -72 56 32 1.20 93 0 0 -71 10 41 14 26 52.3 8 52 -32 -69 45 32 -72 38 49 -69 37 50 -72 47 6 1.20 94 0 0 -71 0 30 14 26 51.5 9 51 -32 -69 34 59 -72 29 4 -69 27 15 -72 37 23 1.20 95 0 0 -70 50 2 14 26 50.7 9 50 -33 -69 24 8 -72 19 0 -69 16 22 -72 27 23 1.20 96 0 0 -70 39 15 14 26 49.8 10 49 -33 -69 12 58 -72 8 39 -69 5 10 -72 17 4 1.21 97 0 0 -70 28 9 14 26 48.9 10 48 -34 -69 1 30 -71 57 59 -68 53 40 -72 6 26 1.21 98 0 0 -70 16 45 14 26 47.9 10 47 -34 -68 49 42 -71 47 1 -68 41 50 -71 55 30 1.21 99 0 0 -70 5 1 14 26 46.9 11 46 -34 -68 37 35 -71 35 43 -68 29 41 -71 44 15 1.21 100 0 0 -69 52 58 14 26 45.8 11 45 -35 -68 25 9 -71 24 6 -68 17 13 -71 32 41 1.21 101 0 0 -69 40 35 14 26 44.7 11 45 -35 -68 12 22 -71 12 9 -68 4 24 -71 20 47 1.21 102 0 0 -69 27 52 14 26 43.5 12 44 -35 -67 59 16 -70 59 53 -67 51 15 -71 8 33 1.21 103 0 0 -69 14 48 14 26 42.3 12 43 -36 -67 45 49 -70 47 15 -67 37 46 -70 55 58 1.21 104 0 0 -69 1 24 14 26 41.0 13 42 -36 -67 32 1 -70 34 17 -67 23 57 -70 43 2 1.21 105 0 0 -68 47 39 14 26 39.7 13 41 -37 -67 17 53 -70 20 58 -67 9 46 -70 29 46 1.21 106 0 0 -68 33 32 14 26 38.3 13 40 -37 -67 3 23 -70 7 18 -66 55 15 -70 16 8 1.22 107 0 0 -68 19 5 14 26 36.8 14 39 -38 -66 48 33 -69 53 16 -66 40 22 -70 2 9 1.22 108 0 0 -68 4 15 14 26 35.2 14 38 -38 -66 33 20 -69 38 52 -66 25 8 -69 47 47 1.22 109 0 0 -67 49 3 14 26 33.6 15 37 -38 -66 17 46 -69 24 6 -66 9 32 -69 33 3 1.22 110 0 0 -67 33 29 14 26 31.9 15 36 -39 -66 1 50 -69 8 57 -65 53 34 -69 17 57 1.22 111 0 0 -67 17 33 14 26 30.2 16 35 -39 -65 45 32 -68 53 25 -65 37 14 -69 2 28 1.22 112 0 0 -67 1 14 14 26 28.3 16 34 -40 -65 28 52 -68 37 30 -65 20 32 -68 46 36 1.22 113 0 0 -66 44 32 14 26 26.4 16 33 -40 -65 11 49 -68 21 13 -65 3 28 -68 30 20 1.22 114 0 0 -66 27 28 14 26 24.4 17 32 -41 -64 54 24 -68 4 31 -64 46 1 -68 13 41 1.22 115 0 0 -66 10 0 14 26 22.3 17 31 -41 -64 36 36 -67 47 26 -64 28 11 -67 56 38 1.22 116 0 0 -65 52 9 14 26 20.1 18 30 -42 -64 18 26 -67 29 57 -64 9 59 -67 39 11 1.22 117 0 0 -65 33 54 14 26 17.9 18 29 -42 -63 59 53 -67 12 4 -63 51 24 -67 21 21 1.22 118 0 0 -65 15 16 14 26 15.5 19 28 -43 -63 40 57 -66 53 47 -63 32 27 -67 3 6 1.22 119 0 0 -64 56 15 14 26 13.1 19 27 -43 -63 21 38 -66 35 6 -63 13 7 -66 44 26 1.23 120 0 0 -64 36 50 14 26 10.5 20 26 -44 -63 1 57 -66 16 0 -62 53 24 -66 25 22 1.23 121 0 0 -64 17 2 14 26 7.9 20 25 -44 -62 41 52 -65 56 30 -62 33 18 -66 5 54 1.23 122 0 0 -63 56 50 14 26 5.2 21 24 -45 -62 21 26 -65 36 35 -62 12 50 -65 46 1 1.23 123 0 0 -63 36 15 14 26 2.3 21 23 -45 -62 0 36 -65 16 17 -61 51 59 -65 25 44 1.23 124 0 0 -63 15 17 14 25 59.4 22 22 -46 -61 39 24 -64 55 34 -61 30 46 -65 5 3 1.23 125 0 0 -62 53 55 14 25 56.3 22 21 -46 -61 17 50 -64 34 26 -61 9 11 -64 43 57 1.23 126 0 0 -62 32 11 14 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28 28 -37 32 54 1.23 -173 0 0 -35 36 41 14 19 31.0 36 307 -52 -34 13 59 -37 2 9 -34 6 29 -37 10 11 1.23 -172 0 0 -35 14 45 14 19 23.8 35 306 -51 -33 52 23 -36 39 53 -33 44 55 -36 47 52 1.23 -171 0 0 -34 53 15 14 19 16.6 35 304 -51 -33 31 11 -36 18 2 -33 23 45 -36 25 59 1.23 -170 0 0 -34 32 10 14 19 9.6 34 303 -50 -33 10 24 -35 56 36 -33 3 0 -36 4 32 1.23 -169 0 0 -34 11 31 14 19 2.6 34 302 -49 -32 50 3 -35 35 37 -32 42 40 -35 43 31 1.23 -168 0 0 -33 51 18 14 18 55.7 33 301 -48 -32 30 8 -35 15 5 -32 22 47 -35 22 56 1.23 -167 0 0 -33 31 32 14 18 48.9 33 300 -48 -32 10 39 -34 55 0 -32 3 19 -35 2 49 1.23 -166 0 0 -33 12 13 14 18 42.2 32 299 -47 -31 51 37 -34 35 22 -31 44 19 -34 43 10 1.23 -165 0 0 -32 53 21 14 18 35.6 32 298 -46 -31 33 2 -34 16 13 -31 25 45 -34 23 59 1.23 -164 0 0 -32 34 58 14 18 29.1 31 298 -45 -31 14 54 -33 57 32 -31 7 39 -34 5 17 1.23 -163 0 0 -32 17 3 14 18 22.7 30 297 -44 -30 57 15 -33 39 20 -30 50 1 -33 47 3 1.23 -162 0 0 -31 59 37 14 18 16.4 30 296 -44 -30 40 4 -33 21 37 -30 32 51 -33 29 19 1.23 -161 0 0 -31 42 40 14 18 10.3 29 295 -43 -30 23 21 -33 4 24 -30 16 10 -33 12 4 1.23 -160 0 0 -31 26 12 14 18 4.2 29 294 -42 -30 7 8 -32 47 41 -29 59 58 -32 55 19 1.23 -159 0 0 -31 10 14 14 17 58.3 28 293 -41 -29 51 24 -32 31 28 -29 44 15 -32 39 5 1.24 -158 0 0 -30 54 47 14 17 52.5 27 292 -40 -29 36 9 -32 15 46 -29 29 1 -32 23 21 1.24 -157 0 0 -30 39 49 14 17 46.9 27 292 -39 -29 21 25 -32 0 35 -29 14 18 -32 8 9 1.24 -156 0 0 -30 25 23 14 17 41.3 26 291 -38 -29 7 10 -31 45 55 -29 0 4 -31 53 28 1.24 -155 0 0 -30 11 27 14 17 36.0 25 290 -38 -28 53 26 -31 31 46 -28 46 21 -31 39 18 1.24 -154 0 0 -29 58 3 14 17 30.7 24 289 -37 -28 40 13 -31 18 10 -28 33 9 -31 25 40 1.24 -153 0 0 -29 45 10 14 17 25.6 24 289 -36 -28 27 31 -31 5 5 -28 20 28 -31 12 34 1.24 -152 0 0 -29 32 49 14 17 20.6 23 288 -35 -28 15 20 -30 52 33 -28 8 18 -31 0 1 1.24 -151 0 0 -29 21 0 14 17 15.8 22 287 -34 -28 3 41 -30 40 33 -27 56 40 -30 48 0 1.24 -150 0 0 -29 9 43 14 17 11.2 21 287 -33 -27 52 33 -30 29 6 -27 45 33 -30 36 32 1.24 -149 0 0 -28 58 58 14 17 6.7 21 286 -32 -27 41 57 -30 18 12 -27 34 58 -30 25 37 1.24 -148 0 0 -28 48 47 14 17 2.4 20 286 -32 -27 31 54 -30 7 51 -27 24 55 -30 15 16 1.25 -147 0 0 -28 39 8 14 16 58.2 19 285 -31 -27 22 23 -29 58 4 -27 15 25 -30 5 28 1.25 -146 0 0 -28 30 2 14 16 54.2 18 284 -30 -27 13 24 -29 48 51 -27 6 27 -29 56 13 1.25 -145 0 0 -28 21 30 14 16 50.3 17 284 -29 -27 4 59 -29 40 11 -26 58 2 -29 47 33 1.25 -144 0 0 -28 13 31 14 16 46.6 17 283 -28 -26 57 6 -29 32 5 -26 50 9 -29 39 26 1.25 -143 0 0 -28 6 5 14 16 43.1 16 283 -27 -26 49 46 -29 24 33 -26 42 50 -29 31 54 1.26 -142 0 0 -27 59 14 14 16 39.8 15 282 -26 -26 42 59 -29 17 36 -26 36 4 -29 24 57 1.26 -141 0 0 -27 52 56 14 16 36.6 14 282 -25 -26 36 46 -29 11 14 -26 29 52 -29 18 33 1.26 -140 0 0 -27 47 12 14 16 33.6 13 281 -25 -26 31 7 -29 5 26 -26 24 12 -29 12 45 1.26 -139 0 0 -27 42 3 14 16 30.8 13 281 -24 -26 26 1 -29 0 13 -26 19 7 -29 7 32 1.27 -138 0 0 -27 37 28 14 16 28.2 12 280 -23 -26 21 29 -28 55 34 -26 14 35 -29 2 53 1.27 -137 0 0 -27 33 28 14 16 25.7 11 280 -22 -26 17 31 -28 51 31 -26 10 38 -28 58 50 1.27 -136 0 0 -27 30 2 14 16 23.5 10 279 -21 -26 14 8 -28 48 4 -26 7 14 -28 55 22 1.28 -135 0 0 -27 27 11 14 16 21.4 9 279 -20 -26 11 18 -28 45 11 -26 4 25 -28 52 29 1.28 -134 0 0 -27 24 55 14 16 19.5 8 278 -19 -26 9 3 -28 42 54 -26 2 9 -28 50 12 1.29 -133 0 0 -27 23 14 14 16 17.8 7 278 -18 -26 7 22 -28 41 13 -26 0 29 -28 48 31 1.30 -132 0 0 -27 22 8 14 16 16.3 6 277 -18 -26 6 16 -28 40 7 -25 59 23 -28 47 25 1.31 -131 0 0 -27 21 37 14 16 14.9 6 277 -17 -26 5 44 -28 39 37 -25 58 51 -28 46 55 1.32 -130 0 0 -27 21 42 14 16 13.8 5 276 -16 -26 5 48 -28 39 43 -25 58 54 -28 47 1 1.34 -129 0 0 -27 22 22 14 16 12.8 4 276 -15 -26 6 26 -28 40 25 -25 59 32 -28 47 43 1.37 -128 0 0 -27 23 37 14 16 12.1 3 275 -14 -26 7 39 -28 41 43 -26 0 45 -28 49 2 1.41 -127 0 0 -27 25 28 14 16 11.5 2 275 -13 -26 9 26 -28 43 37 -26 2 32 -28 50 56 1.48 -126 0 0 -27 27 55 14 16 11.2 1 274 -13 -26 11 49 -28 46 7 -26 4 55 -28 53 27 1.67 -125 0 0 -27 30 57 14 16 11.0 0 274 -12 -26 14 48 -28 49 14 -26 7 53 -28 56 34 3.01 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 467-108486 * constellation : Aquila * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 38 52.2748 DE: +03 17 00.271 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 38 52.2748 DE: +03 17 00.271 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 10.5 * B mag [mag]: 12.0 * Diameter [mas]: 0.30 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (386) Siegena asteroid class: approx. diameter [km]: 178 approx. diameter ["]: 0.130 distance from Earth [AU]: 1.89000 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#122 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): 0.015", 0.002", 89.453° remarks: * orbital elements for (386)Siegena : Mean anomaly = 285.7943324196 deg Arg. of pericenter = 221.0287952955 deg Long. of node = 166.6183840781 deg Inclination = 20.2174887689 deg Eccentricity = 0.1692885086 Semimajor axis = 2.8977551125 AU Perihelion dist = 2.4071984711 AU Mag: H = 7.72, G = 0.16 Epoch of elements : MJD 60506.59834625 TDT (2024 Jul 15.5983) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1222023Apr24,14.49,2024,7,15,14.360297,0.307428,-0.710890,-6.398775,-2.767075,0.000068,-0.002317,0.000001,0.000000 145.6968,3.3395,-33.88,21.38,False UCAC4 467-108486,19.64785411,3.2834085,11.99,10.50,9.70,0.3,4,,19.66865864,3.3394610,1.71,2.00,0,0,0 386,Siegena,11.96,178.910,1.8900,0,0,-1.988,-12.88,,13.2,0 0,285.6748,2024,7,15,221.0288,166.6184,20.2175,0.16929,2.89776,2.40720,7.72,5.0,0.15 1.046,0.0147,0.0021,89,0.0060,Known errors,0.96,0,-1,-1 20240715_108486,60140.20 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 04:51 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org