IOTA/IOTA-ES occultation update for (5057) Weeks / HIP 20485 event on 2024 Jul 26, 04:53 UT Visible from Summary ------- On 2024 Jul 26 UT, the 16.9899394256239 km diameter asteroid (5057) Weeks will occult a 10.0 mag star in the constellation Taurus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 8.19 mag to 18.21 mag (the magnitude of the asteroid) for at most 0.500 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 Jul 26, 04:50 - 2024 Jul 26, 04:56 * geocentric midpoint of event [JD]: 2460517.70397912 * magnitude of target star: 10.02 * magnitude drop [mag]: 8.19 * estimated maximum duration [s]: 0.500 * Moon: 71 % sunlit, 59° distance * Sun: 57° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 19 * 1 sigma uncertainty interval [path widths]: +/- 0.22 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.020, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.021", 0.001", 81°) * approx speed of asteroid's shadow [km/s]: 34.7188 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 20485 by 5057 Weeks on 2024 Jul 26 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 - 46 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 17 32 54 .. .. .. 17 35 14 .... - 45 0 0 17 44 49 4 50 56.1 1 74 -45 17 39 31 17 50 8 17 37 11 17 52 28 .... - 44 0 0 18 2 10 4 50 56.2 2 74 -44 17 56 51 18 7 29 17 54 31 18 9 49 -0.38 - 43 0 0 18 19 37 4 50 56.3 3 74 -43 18 14 18 18 24 56 18 11 58 18 27 16 -0.40 - 42 0 0 18 37 9 4 50 56.5 4 75 -43 18 31 50 18 42 28 18 29 30 18 44 49 -0.41 - 41 0 0 18 54 47 4 50 56.8 5 75 -42 18 49 28 19 0 6 18 47 7 19 2 27 -0.41 - 40 0 0 19 12 30 4 50 57.1 6 75 -41 19 7 10 19 17 49 19 4 50 19 20 10 -0.41 - 39 0 0 19 30 17 4 50 57.5 7 76 -40 19 24 57 19 35 37 19 22 37 19 37 57 -0.42 - 38 0 0 19 48 8 4 50 58.0 8 76 -39 19 42 49 19 53 28 19 40 28 19 55 49 -0.42 - 37 0 0 20 6 4 4 50 58.5 9 76 -38 20 0 44 20 11 24 19 58 23 20 13 44 -0.42 - 36 0 0 20 24 2 4 50 59.0 10 77 -38 20 18 42 20 29 22 20 16 22 20 31 43 -0.42 - 35 0 0 20 42 4 4 50 59.7 11 77 -37 20 36 44 20 47 24 20 34 23 20 49 45 -0.42 - 34 0 0 21 0 8 4 51 0.3 12 77 -36 20 54 47 21 5 28 20 52 27 21 7 49 -0.42 - 33 0 0 21 18 14 4 51 1.1 13 78 -35 21 12 53 21 23 34 21 10 33 21 25 55 -0.42 - 32 0 0 21 36 21 4 51 1.9 14 78 -34 21 31 1 21 41 42 21 28 40 21 44 3 -0.42 - 31 0 0 21 54 31 4 51 2.7 15 79 -33 21 49 10 21 59 51 21 46 49 22 2 12 -0.42 - 30 0 0 22 12 40 4 51 3.6 16 79 -32 22 7 20 22 18 1 22 4 59 22 20 22 -0.42 - 29 0 0 22 30 51 4 51 4.6 17 79 -31 22 25 30 22 36 12 22 23 9 22 38 33 -0.43 - 28 0 0 22 49 1 4 51 5.6 18 80 -31 22 43 41 22 54 22 22 41 20 22 56 43 -0.43 - 27 0 0 23 7 11 4 51 6.6 19 80 -30 23 1 51 23 12 32 22 59 30 23 14 53 -0.43 - 26 0 0 23 25 20 4 51 7.7 20 81 -29 23 20 0 23 30 41 23 17 39 23 33 3 -0.43 - 25 0 0 23 43 29 4 51 8.9 21 81 -28 23 38 8 23 48 50 23 35 47 23 51 11 -0.43 - 24 0 0 24 1 35 4 51 10.1 22 82 -27 23 56 14 24 6 56 23 53 53 24 9 17 -0.43 - 23 0 0 24 19 39 4 51 11.4 22 82 -26 24 14 19 24 25 0 24 11 58 24 27 22 -0.43 - 22 0 0 24 37 41 4 51 12.7 23 83 -25 24 32 21 24 43 2 24 30 0 24 45 24 -0.43 - 21 0 0 24 55 41 4 51 14.1 24 83 -24 24 50 20 25 1 2 24 47 59 25 3 23 -0.43 - 20 0 0 25 13 37 4 51 15.5 25 84 -23 25 8 16 25 18 57 25 5 55 25 21 19 -0.43 - 19 0 0 25 31 29 4 51 16.9 26 84 -22 25 26 8 25 36 50 25 23 47 25 39 11 -0.43 - 18 0 0 25 49 17 4 51 18.4 27 85 -21 25 43 57 25 54 38 25 41 36 25 56 59 -0.43 - 17 0 0 26 7 2 4 51 20.0 28 85 -21 26 1 41 26 12 22 25 59 20 26 14 43 -0.43 - 16 0 0 26 24 41 4 51 21.5 29 86 -20 26 19 20 26 30 2 26 17 0 26 32 23 -0.43 - 15 0 0 26 42 15 4 51 23.2 30 86 -19 26 36 55 26 47 36 26 34 34 26 49 57 -0.43 - 14 0 0 26 59 44 4 51 24.8 31 87 -18 26 54 24 27 5 5 26 52 3 27 7 25 -0.43 - 13 0 0 27 17 7 4 51 26.5 32 88 -17 27 11 47 27 22 27 27 9 26 27 24 48 -0.43 - 12 0 0 27 34 24 4 51 28.3 33 88 -16 27 29 4 27 39 44 27 26 43 27 42 5 -0.43 - 11 0 0 27 51 34 4 51 30.1 34 89 -15 27 46 14 27 56 54 27 43 54 27 59 15 -0.43 - 10 0 0 28 8 38 4 51 31.9 34 89 -14 28 3 18 28 13 58 28 0 57 28 16 18 -0.43 - 9 0 0 28 25 34 4 51 33.8 35 90 -13 28 20 14 28 30 54 28 17 54 28 33 14 -0.43 - 8 0 0 28 42 23 4 51 35.7 36 91 -12 28 37 3 28 47 42 28 34 43 28 50 3 -0.43 - 7 0 0 28 59 4 4 51 37.6 37 92 -11 28 53 44 29 4 23 28 51 24 29 6 44 -0.43 - 6 0 0 29 15 36 4 51 39.6 38 92 -11 29 10 17 29 20 56 29 7 57 29 23 16 -0.43 - 5 0 0 29 32 1 4 51 41.6 39 93 -10 29 26 42 29 37 20 29 24 22 29 39 40 -0.43 - 4 0 0 29 48 16 4 51 43.6 40 94 -9 29 42 58 29 53 35 29 40 38 29 55 56 -0.43 - 3 0 0 30 4 23 4 51 45.6 41 95 -8 29 59 4 30 9 42 29 56 45 30 12 2 -0.43 - 2 0 0 30 20 20 4 51 47.7 41 95 -7 30 15 2 30 25 39 30 12 42 30 27 59 -0.43 - 1 0 0 30 36 8 4 51 49.9 42 96 -6 30 30 50 30 41 26 30 28 30 30 43 46 -0.43 0 0 0 30 51 46 4 51 52.0 43 97 -5 30 46 28 30 57 4 30 44 8 30 59 24 -0.43 1 0 0 31 7 13 4 51 54.2 44 98 -4 31 1 56 31 12 31 30 59 36 31 14 51 -0.43 2 0 0 31 22 31 4 51 56.4 45 99 -3 31 17 13 31 27 48 31 14 54 31 30 8 -0.43 3 0 0 31 37 37 4 51 58.6 46 100 -3 31 32 20 31 42 55 31 30 1 31 45 14 -0.43 4 0 0 31 52 33 4 52 0.8 46 101 -2 31 47 16 31 57 50 31 44 57 32 0 10 -0.43 5 0 0 32 7 18 4 52 3.1 47 102 -1 32 2 1 32 12 35 31 59 42 32 14 54 -0.43 6 0 0 32 21 51 4 52 5.4 48 103 0 32 16 35 32 27 8 32 14 16 32 29 27 -0.43 7 0 0 32 36 13 4 52 7.7 49 104 1 32 30 57 32 41 29 32 28 38 32 43 48 -0.43 8 0 0 32 50 23 4 52 10.0 49 105 2 32 45 7 32 55 39 32 42 49 32 57 58 -0.43 9 0 0 33 4 21 4 52 12.4 50 106 3 32 59 6 33 9 37 32 56 47 33 11 56 -0.43 10 0 0 33 18 7 4 52 14.7 51 107 4 33 12 52 33 23 23 33 10 34 33 25 41 -0.43 11 0 0 33 31 41 4 52 17.1 52 108 4 33 26 26 33 36 56 33 24 8 33 39 15 -0.43 12 0 0 33 45 2 4 52 19.5 52 109 5 33 39 48 33 50 17 33 37 29 33 52 36 -0.43 13 0 0 33 58 11 4 52 21.9 53 110 6 33 52 57 34 3 26 33 50 38 34 5 44 -0.43 14 0 0 34 11 7 4 52 24.3 54 112 7 34 5 53 34 16 21 34 3 35 34 18 39 -0.43 15 0 0 34 23 50 4 52 26.8 55 113 8 34 18 36 34 29 4 34 16 18 34 31 22 -0.43 16 0 0 34 36 19 4 52 29.2 55 114 9 34 31 6 34 41 33 34 28 48 34 43 51 -0.43 17 0 0 34 48 36 4 52 31.7 56 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1 37 12 20 36 59 45 37 14 36 -0.43 31 0 0 37 16 10 4 53 7.0 64 139 21 37 11 1 37 21 19 37 8 45 37 23 35 -0.43 32 0 0 37 24 54 4 53 9.6 64 141 22 37 19 46 37 30 3 37 17 30 37 32 19 -0.43 33 0 0 37 33 24 4 53 12.1 64 143 23 37 28 16 37 38 33 37 26 0 37 40 49 -0.43 34 0 0 37 41 40 4 53 14.7 65 145 24 37 36 31 37 46 48 37 34 16 37 49 4 -0.43 35 0 0 37 49 40 4 53 17.3 65 148 25 37 44 32 37 54 48 37 42 16 37 57 4 -0.43 36 0 0 37 57 25 4 53 19.8 65 150 25 37 52 17 38 2 33 37 50 2 38 4 49 -0.43 37 0 0 38 4 56 4 53 22.4 66 152 26 37 59 48 38 10 3 37 57 33 38 12 19 -0.43 38 0 0 38 12 11 4 53 24.9 66 155 27 38 7 4 38 17 19 38 4 49 38 19 34 -0.43 39 0 0 38 19 12 4 53 27.5 66 157 28 38 14 5 38 24 19 38 11 50 38 26 34 -0.43 40 0 0 38 25 57 4 53 30.1 66 159 29 38 20 50 38 31 4 38 18 35 38 33 19 -0.43 41 0 0 38 32 27 4 53 32.6 66 162 29 38 27 21 38 37 34 38 25 6 38 39 49 -0.43 42 0 0 38 38 43 4 53 35.2 66 164 30 38 33 36 38 43 49 38 31 21 38 46 4 -0.43 43 0 0 38 44 43 4 53 37.7 67 167 31 38 39 36 38 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-0.44 122 0 0 33 21 11 4 56 19.7 22 275 71 33 15 56 33 26 26 33 13 37 33 28 45 -0.44 123 0 0 33 7 32 4 56 20.8 21 276 70 33 2 16 33 12 47 32 59 58 33 15 6 -0.44 124 0 0 32 53 41 4 56 21.9 20 276 70 32 48 25 32 58 57 32 46 6 33 1 16 -0.44 125 0 0 32 39 38 4 56 22.9 19 277 69 32 34 22 32 44 54 32 32 3 32 47 13 -0.44 126 0 0 32 25 24 4 56 23.9 18 278 69 32 20 7 32 30 40 32 17 48 32 32 59 -0.45 127 0 0 32 10 58 4 56 24.8 17 278 68 32 5 42 32 16 15 32 3 22 32 18 34 -0.45 128 0 0 31 56 21 4 56 25.7 16 279 68 31 51 4 32 1 38 31 48 45 32 3 58 -0.45 129 0 0 31 41 33 4 56 26.6 15 279 67 31 36 16 31 46 51 31 33 57 31 49 10 -0.45 130 0 0 31 26 35 4 56 27.4 15 280 66 31 21 18 31 31 52 31 18 58 31 34 12 -0.45 131 0 0 31 11 26 4 56 28.1 14 280 66 31 6 9 31 16 44 31 3 49 31 19 4 -0.45 132 0 0 30 56 7 4 56 28.9 13 281 65 30 50 49 31 1 25 30 48 30 31 3 45 -0.45 133 0 0 30 40 38 4 56 29.5 12 281 64 30 35 20 30 45 56 30 33 0 30 48 16 -0.46 134 0 0 30 24 59 4 56 30.2 11 282 64 30 19 40 30 30 17 30 17 21 30 32 37 -0.46 135 0 0 30 9 10 4 56 30.7 10 283 63 30 3 52 30 14 29 30 1 32 30 16 49 -0.46 136 0 0 29 53 13 4 56 31.3 9 283 62 29 47 54 29 58 31 29 45 34 30 0 52 -0.46 137 0 0 29 37 6 4 56 31.8 8 284 61 29 31 47 29 42 25 29 29 27 29 44 45 -0.47 138 0 0 29 20 51 4 56 32.2 7 284 61 29 15 32 29 26 10 29 13 12 29 28 30 -0.47 139 0 0 29 4 27 4 56 32.6 6 285 60 28 59 8 29 9 46 28 56 48 29 12 7 -0.48 140 0 0 28 47 55 4 56 32.9 6 285 59 28 42 36 28 53 15 28 40 16 28 55 35 -0.49 141 0 0 28 31 16 4 56 33.2 5 285 58 28 25 57 28 36 36 28 23 36 28 38 56 -0.50 142 0 0 28 14 29 4 56 33.4 4 286 57 28 9 9 28 19 49 28 6 49 28 22 10 -0.52 143 0 0 27 57 35 4 56 33.6 3 286 56 27 52 16 28 2 55 27 49 55 28 5 16 -0.55 144 0 0 27 40 34 4 56 33.8 2 287 56 27 35 15 27 45 55 27 32 54 27 48 15 -0.61 145 0 0 27 23 27 4 56 33.8 1 287 55 27 18 7 27 28 47 27 15 46 27 31 8 -0.79 146 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. 27 13 55 .... Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: HIP 20485 * constellation : Taurus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 04 23 25.4934 DE: +15 45 46.592 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 04 23 25.4947 DE: +15 45 46.596 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 10.0 * B mag [mag]: 10.7 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5057) Weeks asteroid class: approx. diameter [km]: 17 approx. diameter ["]: 0.007 distance from Earth [AU]: 3.13070 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#49 date of fit: 2023 Apr 27 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): 0.021", 0.001", 80.91° remarks: * orbital elements for (5057)Weeks : Mean anomaly = 336.7858810584 deg Arg. of pericenter = 282.6320587675 deg Long. of node = 157.1283279599 deg Inclination = 7.0027511409 deg Eccentricity = 0.1489759147 Semimajor axis = 3.1269674700 AU Perihelion dist = 2.6611246310 AU Mag: H = 12.62, G = 0.15 Epoch of elements : MJD 60517.20397966 TDT (2024 Jul 26.2040) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#492023Apr27,0.50,2024,7,26,4.895499,-0.040726,0.389840,19.521055,1.715376,-0.004483,-0.001043,-0.000001,0.000000 48.3876,15.8206,108.21,19.32,False HIP 20485,4.39041478,15.7629420,10.70,10.02,9.65,0.1,4,,4.41348749,15.8206458,8.19,8.11,0,0,0 5057,Weeks,18.21,17.217,3.1307,0,0,3.800,4.82,,1.6,0 0,336.7495,2024,7,26,282.6321,157.1283,7.0028,0.14898,3.12697,2.66112,12.62,5.0,0.15 1.220,0.0207,0.0008,81,0.0017,Known errors,1.23,0,-1,-1 20240726__20485,60140.22 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:16 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org