IOTA/IOTA-ES occultation update for (676) Melitta / TYC 5692-02261-1 event on 2023 Apr 12, 16:21 UT Visible from Australia Summary ------- On 2023 Apr 12 UT, the 82.7 km diameter asteroid (676) Melitta will occult a 10.8 mag star in the constellation Scutum for observers along a path across Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.14 mag to 14.92 mag (the magnitude of the asteroid) for at most 6.450 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: 2023 Apr 12, 16:13 - 2023 Apr 12, 16:30 * geocentric midpoint of event [JD]: 2460047.18178479 * magnitude of target star: 10.80 * magnitude drop [mag]: 4.14 * estimated maximum duration [s]: 6.450 * Moon: 58 % sunlit, 18° distance * Sun: 100° distance * rough path description: Australia The occultation path -------------------- * approximate projected width [km]: 83 * 1 sigma uncertainty interval [path widths]: +/- 0.27 * 1 sigma uncertainty interval [seconds]: +/- 3.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.025, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.025", 0.004", 94°) * approx speed of asteroid's shadow [km/s]: 12.8145 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5692-02261-1 by 676 Melitta on 2023 Apr 12 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 103 0 0 -30 13 2 16 13 32.6 1 100 -65 -30 36 0 -29 50 6 -30 48 13 -29 37 54 .... 104 0 0 -30 22 27 16 13 32.7 2 100 -65 -30 45 23 -29 59 32 -30 57 35 -29 47 22 0.13 105 0 0 -30 31 29 16 13 33.0 2 99 -66 -30 54 24 -30 8 36 -31 6 35 -29 56 27 0.13 106 0 0 -30 40 9 16 13 33.4 3 99 -66 -31 3 1 -30 17 17 -31 15 12 -30 5 9 0.13 107 0 0 -30 48 25 16 13 33.9 4 98 -66 -31 11 16 -30 25 35 -31 23 25 -30 13 27 0.13 108 0 0 -30 56 19 16 13 34.5 5 98 -66 -31 19 8 -30 33 30 -31 31 16 -30 21 23 0.13 109 0 0 -31 3 49 16 13 35.2 6 97 -67 -31 26 37 -30 41 2 -31 38 45 -30 28 56 0.13 110 0 0 -31 10 56 16 13 36.1 7 97 -67 -31 33 43 -30 48 11 -31 45 50 -30 36 5 0.13 111 0 0 -31 17 41 16 13 37.0 8 96 -67 -31 40 26 -30 54 57 -31 52 32 -30 42 52 0.12 112 0 0 -31 24 2 16 13 38.1 8 96 -67 -31 46 46 -31 1 19 -31 58 52 -30 49 15 0.12 113 0 0 -31 30 0 16 13 39.3 9 95 -67 -31 52 43 -31 7 19 -32 4 48 -30 55 15 0.12 114 0 0 -31 35 36 16 13 40.5 10 95 -67 -31 58 17 -31 12 55 -32 10 21 -31 0 52 0.12 115 0 0 -31 40 48 16 13 41.9 11 94 -67 -32 3 28 -31 18 8 -32 15 32 -31 6 6 0.12 116 0 0 -31 45 37 16 13 43.4 12 94 -67 -32 8 16 -31 22 58 -32 20 20 -31 10 57 0.12 117 0 0 -31 50 3 16 13 45.1 13 93 -67 -32 12 41 -31 27 25 -32 24 44 -31 15 24 0.12 118 0 0 -31 54 6 16 13 46.8 14 93 -67 -32 16 43 -31 31 29 -32 28 46 -31 19 28 0.12 119 0 0 -31 57 45 16 13 48.6 15 92 -67 -32 20 22 -31 35 9 -32 32 24 -31 23 9 0.12 120 0 0 -32 1 2 16 13 50.6 15 91 -67 -32 23 38 -31 38 27 -32 35 40 -31 26 27 0.12 121 0 0 -32 3 55 16 13 52.6 16 91 -66 -32 26 31 -31 41 21 -32 38 32 -31 29 21 0.12 122 0 0 -32 6 25 16 13 54.8 17 90 -66 -32 29 0 -31 43 51 -32 41 1 -31 31 52 0.12 123 0 0 -32 8 32 16 13 57.0 18 90 -66 -32 31 7 -31 45 59 -32 43 8 -31 34 0 0.12 124 0 0 -32 10 16 16 13 59.4 19 89 -66 -32 32 50 -31 47 43 -32 44 51 -31 35 44 0.12 125 0 0 -32 11 37 16 14 1.8 20 89 -65 -32 34 10 -31 49 4 -32 46 11 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138 0 0 -31 53 33 16 14 43.5 31 81 -59 -32 16 10 -31 30 57 -32 28 12 -31 18 56 0.12 139 0 0 -31 49 24 16 14 47.4 32 81 -59 -32 12 2 -31 26 47 -32 24 4 -31 14 46 0.12 140 0 0 -31 44 52 16 14 51.5 33 80 -58 -32 7 31 -31 22 14 -32 19 34 -31 10 13 0.12 141 0 0 -31 39 56 16 14 55.6 33 80 -58 -32 2 36 -31 17 17 -32 14 39 -31 5 15 0.12 142 0 0 -31 34 36 16 14 59.9 34 79 -57 -31 57 17 -31 11 56 -32 9 21 -30 59 53 0.12 143 0 0 -31 28 52 16 15 4.2 35 79 -56 -31 51 34 -31 6 11 -32 3 38 -30 54 7 0.12 144 0 0 -31 22 44 16 15 8.7 36 78 -56 -31 45 27 -31 0 1 -31 57 32 -30 47 58 0.12 145 0 0 -31 16 12 16 15 13.3 37 77 -55 -31 38 56 -30 53 28 -31 51 2 -30 41 24 0.12 146 0 0 -31 9 15 16 15 17.9 38 77 -55 -31 32 1 -30 46 31 -31 44 8 -30 34 25 0.12 147 0 0 -31 1 55 16 15 22.7 39 76 -54 -31 24 43 -30 39 9 -31 36 50 -30 27 3 0.12 148 0 0 -30 54 11 16 15 27.6 40 76 -53 -31 17 0 -30 31 23 -31 29 8 -30 19 16 0.12 149 0 0 -30 46 2 16 15 32.6 40 75 -52 -31 8 52 -30 23 12 -31 21 2 -30 11 5 0.12 150 0 0 -30 37 29 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-137 0 0 - 4 0 6 16 25 37.1 61 258 18 - 4 25 15 - 3 34 59 - 4 38 38 - 3 21 38 0.13 -136 0 0 - 3 30 59 16 25 45.9 60 257 19 - 3 56 6 - 3 5 52 - 4 9 29 - 2 52 32 0.13 -135 0 0 - 3 1 57 16 25 54.5 59 257 20 - 3 27 4 - 2 36 52 - 3 40 26 - 2 23 32 0.13 -134 0 0 - 2 33 2 16 26 3.0 58 256 22 - 2 58 8 - 2 7 58 - 3 11 29 - 1 54 39 0.13 -133 0 0 - 2 4 15 16 26 11.4 57 256 23 - 2 29 19 - 1 39 12 - 2 42 39 - 1 25 54 0.13 -132 0 0 - 1 35 36 16 26 19.7 56 256 24 - 2 0 38 - 1 10 34 - 2 13 58 - 0 57 17 0.13 -131 0 0 - 1 7 6 16 26 27.8 55 255 25 - 1 32 7 - 0 42 6 - 1 45 26 - 0 28 49 0.13 -130 0 0 - 0 38 46 16 26 35.9 54 255 26 - 1 3 45 - 0 13 48 - 1 17 3 - 0 0 32 0.13 -129 0 0 - 0 10 36 16 26 43.8 52 255 27 - 0 35 34 0 14 20 - 0 48 51 0 27 35 0.13 -128 0 0 0 17 21 16 26 51.6 51 255 28 - 0 7 35 0 42 16 - 0 20 51 0 55 30 0.13 -127 0 0 0 45 7 16 26 59.2 50 254 29 0 20 13 1 10 0 0 6 58 1 23 13 0.13 -126 0 0 1 12 40 16 27 6.8 49 254 30 0 47 48 1 37 30 0 34 34 1 50 42 0.14 -125 0 0 1 39 59 16 27 14.1 48 254 31 1 15 9 2 4 47 1 1 56 2 17 58 0.14 -124 0 0 2 7 4 16 27 21.4 47 254 33 1 42 16 2 31 50 1 29 4 2 45 0 0.14 -123 0 0 2 33 54 16 27 28.4 46 254 34 2 9 8 2 58 38 1 55 57 3 11 46 0.14 -122 0 0 3 0 28 16 27 35.4 45 254 35 2 35 44 3 25 10 2 22 35 3 38 17 0.14 -121 0 0 3 26 46 16 27 42.2 43 254 36 3 2 5 3 51 25 2 48 57 4 4 31 0.14 -120 0 0 3 52 47 16 27 48.8 42 254 37 3 28 9 4 17 24 3 15 2 4 30 29 0.14 -119 0 0 4 18 31 16 27 55.3 41 254 38 3 53 55 4 43 6 3 40 50 4 56 9 0.14 -118 0 0 4 43 57 16 28 1.6 40 254 39 4 19 24 5 8 29 4 6 19 5 21 31 0.14 -117 0 0 5 9 5 16 28 7.8 39 254 40 4 44 34 5 33 34 4 31 31 5 46 35 0.14 -116 0 0 5 33 53 16 28 13.7 38 254 41 5 9 25 5 58 20 4 56 24 6 11 19 0.14 -115 0 0 5 58 22 16 28 19.6 37 254 42 5 33 57 6 22 46 5 20 57 6 35 44 0.14 -114 0 0 6 22 31 16 28 25.3 36 254 43 5 58 8 6 46 53 5 45 10 6 59 49 0.14 -113 0 0 6 46 20 16 28 30.8 35 254 44 6 22 0 7 10 39 6 9 3 7 23 34 0.14 -112 0 0 7 9 48 16 28 36.1 34 254 45 6 45 31 7 34 4 6 32 35 7 46 58 0.14 -111 0 0 7 32 55 16 28 41.3 33 254 46 7 8 41 7 57 8 6 55 47 8 10 0 0.14 -110 0 0 7 55 41 16 28 46.3 31 254 47 7 31 29 8 19 51 7 18 36 8 32 41 0.14 -109 0 0 8 18 4 16 28 51.1 30 254 48 7 53 55 8 42 12 7 41 4 8 55 1 0.14 -108 0 0 8 40 5 16 28 55.8 29 254 50 8 15 59 9 4 10 8 3 9 9 16 58 0.14 -107 0 0 9 1 44 16 29 0.3 28 254 51 8 37 40 9 25 46 8 24 52 9 38 32 0.14 -106 0 0 9 23 0 16 29 4.6 27 254 52 8 58 59 9 46 59 8 46 12 9 59 43 0.14 -105 0 0 9 43 52 16 29 8.8 26 255 53 9 19 54 10 7 49 9 7 9 10 20 32 0.14 -104 0 0 10 4 21 16 29 12.8 25 255 54 9 40 27 10 28 15 9 27 43 10 40 57 0.14 -103 0 0 10 24 27 16 29 16.6 24 255 55 10 0 35 10 48 18 9 47 53 11 0 58 0.14 -102 0 0 10 44 9 16 29 20.3 23 255 56 10 20 19 11 7 57 10 7 39 11 20 35 0.14 -101 0 0 11 3 26 16 29 23.8 22 255 57 10 39 40 11 27 12 10 27 1 11 39 49 0.14 -100 0 0 11 22 20 16 29 27.1 21 255 58 10 58 36 11 46 2 10 45 58 11 58 38 0.14 - 99 0 0 11 40 49 16 29 30.3 20 256 59 11 17 8 12 4 29 11 4 31 12 17 3 0.14 - 98 0 0 11 58 53 16 29 33.3 19 256 60 11 35 15 12 22 30 11 22 40 12 35 3 0.14 - 97 0 0 12 16 33 16 29 36.1 18 256 61 11 52 57 12 40 7 11 40 23 12 52 39 0.14 - 96 0 0 12 33 47 16 29 38.8 17 256 61 12 10 14 12 57 19 11 57 42 13 9 49 0.14 - 95 0 0 12 50 37 16 29 41.3 16 256 62 12 27 6 13 14 6 12 14 36 13 26 35 0.14 - 94 0 0 13 7 1 16 29 43.7 15 257 63 12 43 33 13 30 28 12 31 4 13 42 55 0.14 - 93 0 0 13 23 0 16 29 45.9 14 257 64 12 59 35 13 46 25 12 47 7 13 58 51 0.14 - 92 0 0 13 38 34 16 29 47.9 13 257 65 13 15 11 14 1 56 13 2 45 14 14 21 0.14 - 91 0 0 13 53 43 16 29 49.7 12 257 66 13 30 22 14 17 2 13 17 57 14 29 26 0.14 - 90 0 0 14 8 26 16 29 51.4 11 257 67 13 45 8 14 31 43 13 32 44 14 44 5 0.14 - 89 0 0 14 22 43 16 29 53.0 10 258 68 13 59 27 14 45 58 13 47 5 14 58 19 0.15 - 88 0 0 14 36 35 16 29 54.4 9 258 69 14 13 22 14 59 48 14 1 0 15 12 7 0.15 - 87 0 0 14 50 1 16 29 55.6 8 258 70 14 26 50 15 13 12 14 14 30 15 25 30 0.15 - 86 0 0 15 3 2 16 29 56.7 7 258 71 14 39 53 15 26 10 14 27 34 15 38 27 0.15 - 85 0 0 15 15 37 16 29 57.7 6 259 72 14 52 30 15 38 43 14 40 12 15 50 59 0.15 - 84 0 0 15 27 46 16 29 58.4 5 259 72 15 4 41 15 50 50 14 52 24 16 3 5 0.16 - 83 0 0 15 39 29 16 29 59.1 4 259 73 15 16 26 16 2 31 15 4 10 16 14 45 0.16 - 82 0 0 15 50 47 16 29 59.5 3 260 74 15 27 46 16 13 47 15 15 31 16 26 0 0.18 - 81 0 0 16 1 39 16 29 59.9 2 260 75 15 38 40 16 24 37 15 26 26 16 36 49 0.20 - 80 0 0 16 12 5 16 30 0.1 1 260 76 15 49 8 16 35 1 15 36 55 16 47 12 0.29 Uncertainty in time = +/- 4 secs Prediction of 2023 Feb 15.9 Data for the target star ------------------------ * name: TYC 5692-02261-1 * constellation : Scutum * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 45 19.3541 DE: -09 18 39.565 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 45 19.3541 DE: -09 18 39.565 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (676) Melitta asteroid class: approx. diameter [km]: 83 approx. diameter ["]: 0.044 distance from Earth [AU]: 2.56950 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#61 date of fit: 2023 Feb 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): 0.025", 0.004", 93.708° remarks: * orbital elements for (676)Melitta : Mean anomaly = 298.6063581410 deg Arg. of pericenter = 185.1526484088 deg Long. of node = 150.2251736793 deg Inclination = 12.8405756587 deg Eccentricity = 0.1219854314 Semimajor axis = 3.0620174242 AU Perihelion dist = 2.6884959079 AU Mag: H = 9.53, G = 0.15 Epoch of elements : MJD 60046.68180556 TDT (2023 Apr 12.6818) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#612023Feb09,6.45,2023,4,12,16.362835,0.048257,-0.111063,6.637545,2.873586,-0.005617,-0.000707,0.000000,0.000000 -164.4056,-9.2888,-65.24,8.76,False TYC 5692-02261-1,18.75537612,-9.3109904,0.00,10.80,0.00,0.0,0,,18.77653396,-9.2887711,4.14,0.00,0,0,0 676,Melitta,14.92,82.7,2.5695,0,0,1.535,9.84,,4.6,0 0,298.4809,2023,4,12,185.1526,150.2252,12.8406,0.12199,3.06202,2.68850,9.55,5.0,0.15 1.266,0.0247,0.0040,94,0.0118,Known errors,-1.00,-1,-1,-1 20230412_2261-1,59990.87 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Feb 15, 20:59 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org