IOTA/IOTA-ES occultation update for (1051) Merope / TYC 5322-01235-1 event on 2024 Nov 17, 14:32 UT Visible from Summary ------- On 2024 Nov 17 UT, the 67.384 km diameter asteroid (1051) Merope will occult a 11.1 mag star in the constellation Eridanus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.16 mag to 15.21 mag (the magnitude of the asteroid) for at most 4.780 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: 98 * date and approx. time of event: 2024 Nov 17, 14:25 - 2024 Nov 17, 14:40 * geocentric midpoint of event [JD]: 2460632.10609534 * magnitude of target star: 11.07 * magnitude drop [mag]: 4.16 * estimated maximum duration [s]: 4.780 * Moon: 96 % sunlit, 36° distance * Sun: 147° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 68 * 1 sigma uncertainty interval [path widths]: +/- 0.36 * 1 sigma uncertainty interval [seconds]: +/- 2.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.026, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.026", 0.006", 90°) * approx speed of asteroid's shadow [km/s]: 14.0927 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5322-01235-1 by 1051 Merope on 2024 Nov 17 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 60 0 0 -35 46 25 14 40 16.8 0 99 0 -35 27 52 -36 4 58 -35 14 26 -36 18 25 .... 61 0 0 -35 54 22 14 40 16.7 1 99 0 -35 35 51 -36 12 54 -35 22 27 -36 26 20 0.10 62 0 0 -36 1 52 14 40 16.5 2 98 -1 -35 43 23 -36 20 23 -35 29 59 -36 33 47 0.10 63 0 0 -36 8 55 14 40 16.2 3 98 -2 -35 50 27 -36 27 24 -35 37 5 -36 40 47 0.09 64 0 0 -36 15 31 14 40 15.8 4 97 -2 -35 57 4 -36 33 58 -35 43 42 -36 47 20 0.09 65 0 0 -36 21 39 14 40 15.4 4 97 -3 -36 3 13 -36 40 5 -35 49 53 -36 53 27 0.09 66 0 0 -36 27 20 14 40 14.8 5 96 -4 -36 8 56 -36 45 45 -35 55 36 -36 59 6 0.09 67 0 0 -36 32 35 14 40 14.2 6 95 -4 -36 14 11 -36 50 58 -36 0 52 -37 4 18 0.09 68 0 0 -36 37 22 14 40 13.5 7 95 -5 -36 19 0 -36 55 45 -36 5 41 -37 9 4 0.09 69 0 0 -36 41 43 14 40 12.7 8 94 -6 -36 23 21 -37 0 5 -36 10 4 -37 13 23 0.09 70 0 0 -36 45 37 14 40 11.8 8 94 -6 -36 27 16 -37 3 58 -36 13 59 -37 17 16 0.09 71 0 0 -36 49 5 14 40 10.8 9 93 -7 -36 30 45 -37 7 25 -36 17 28 -37 20 43 0.09 72 0 0 -36 52 6 14 40 9.7 10 92 -8 -36 33 46 -37 10 26 -36 20 30 -37 23 43 0.09 73 0 0 -36 54 41 14 40 8.6 11 92 -8 -36 36 22 -37 13 0 -36 23 6 -37 26 17 0.09 74 0 0 -36 56 49 14 40 7.4 12 91 -9 -36 38 30 -37 15 8 -36 25 15 -37 28 24 0.09 75 0 0 -36 58 31 14 40 6.0 12 91 -10 -36 40 13 -37 16 50 -36 26 58 -37 30 6 0.09 76 0 0 -36 59 47 14 40 4.6 13 90 -10 -36 41 29 -37 18 5 -36 28 14 -37 31 21 0.09 77 0 0 -37 0 37 14 40 3.1 14 89 -11 -36 42 19 -37 18 55 -36 29 4 -37 32 11 0.09 78 0 0 -37 1 0 14 40 1.6 15 89 -12 -36 42 43 -37 19 18 -36 29 28 -37 32 34 0.09 79 0 0 -37 0 58 14 39 59.9 16 88 -12 -36 42 40 -37 19 16 -36 29 25 -37 32 32 0.09 80 0 0 -37 0 29 14 39 58.2 16 88 -13 -36 42 11 -37 18 47 -36 28 56 -37 32 3 0.09 81 0 0 -36 59 34 14 39 56.4 17 87 -13 -36 41 16 -37 17 53 -36 28 1 -37 31 9 0.09 82 0 0 -36 58 14 14 39 54.4 18 86 -14 -36 39 55 -37 16 33 -36 26 40 -37 29 49 0.09 83 0 0 -36 56 27 14 39 52.5 19 86 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-35 29 15 -36 33 5 0.09 96 0 0 -35 53 42 14 39 18.9 29 78 -23 -35 35 11 -36 12 15 -35 21 46 -36 25 41 0.09 97 0 0 -35 45 49 14 39 15.7 30 77 -24 -35 27 15 -36 4 23 -35 13 49 -36 17 50 0.09 98 0 0 -35 37 29 14 39 12.5 31 77 -24 -35 18 54 -35 56 4 -35 5 26 -36 9 33 0.09 99 0 0 -35 28 42 14 39 9.1 32 76 -25 -35 10 5 -35 47 19 -34 56 37 -36 0 49 0.09 100 0 0 -35 19 28 14 39 5.7 32 76 -26 -35 0 50 -35 38 8 -34 47 20 -35 51 39 0.09 101 0 0 -35 9 48 14 39 2.1 33 75 -26 -34 51 8 -35 28 29 -34 37 37 -35 42 2 0.09 102 0 0 -34 59 41 14 38 58.5 34 74 -27 -34 40 59 -35 18 24 -34 27 26 -35 31 58 0.09 103 0 0 -34 49 7 14 38 54.8 35 74 -27 -34 30 23 -35 7 52 -34 16 49 -35 21 27 0.09 104 0 0 -34 38 6 14 38 51.0 36 73 -28 -34 19 20 -34 56 53 -34 5 44 -35 10 30 0.09 105 0 0 -34 26 38 14 38 47.1 37 73 -29 -34 7 50 -34 45 28 -33 54 12 -34 59 6 0.10 106 0 0 -34 14 43 14 38 43.1 37 72 -29 -33 55 52 -34 33 35 -33 42 13 -34 47 15 0.10 107 0 0 -34 2 21 14 38 39.0 38 71 -30 -33 43 27 -34 21 14 -33 29 47 -34 34 56 0.10 108 0 0 -33 49 31 14 38 34.8 39 71 -30 -33 30 35 -34 8 27 -33 16 53 -34 22 10 0.10 109 0 0 -33 36 14 14 38 30.5 40 70 -31 -33 17 16 -33 55 12 -33 3 32 -34 8 58 0.10 110 0 0 -33 22 29 14 38 26.2 41 70 -32 -33 3 29 -33 41 30 -32 49 43 -33 55 17 0.10 111 0 0 -33 8 17 14 38 21.7 42 69 -32 -32 49 14 -33 27 21 -32 35 27 -33 41 10 0.10 112 0 0 -32 53 38 14 38 17.1 42 68 -33 -32 34 32 -33 12 44 -32 20 43 -33 26 34 0.10 113 0 0 -32 38 30 14 38 12.5 43 68 -34 -32 19 22 -32 57 39 -32 5 31 -33 11 32 0.10 114 0 0 -32 22 55 14 38 7.7 44 67 -34 -32 3 44 -32 42 7 -31 49 51 -32 56 1 0.10 115 0 0 -32 6 52 14 38 2.9 45 67 -35 -31 47 39 -32 26 7 -31 33 43 -32 40 3 0.10 116 0 0 -31 50 22 14 37 57.9 46 66 -35 -31 31 5 -32 9 39 -31 17 8 -32 23 37 0.10 117 0 0 -31 33 23 14 37 52.9 47 65 -36 -31 14 4 -31 52 43 -31 0 4 -32 6 43 0.10 118 0 0 -31 15 56 14 37 47.7 48 65 -37 -30 56 34 -31 35 19 -30 42 33 -31 49 22 0.10 119 0 0 -30 58 2 14 37 42.4 49 64 -37 -30 38 37 -31 17 28 -30 24 33 -31 31 32 0.10 120 0 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25 26.8 12 256 -5 22 55 22 22 17 25 23 9 7 22 3 40 0.10 -127 0 0 22 51 14 14 25 25.3 11 256 -5 23 10 10 22 32 17 23 23 52 22 18 34 0.10 -126 0 0 23 5 33 14 25 23.8 11 257 -4 23 24 27 22 46 39 23 38 7 22 32 57 0.10 -125 0 0 23 19 22 14 25 22.5 10 257 -3 23 38 13 23 0 30 23 51 52 22 46 50 0.10 -124 0 0 23 32 41 14 25 21.4 9 257 -2 23 51 30 23 13 51 24 5 7 23 0 13 0.10 -123 0 0 23 45 29 14 25 20.3 8 258 -1 24 4 16 23 26 42 24 17 52 23 13 5 0.10 -122 0 0 23 57 47 14 25 19.4 7 258 -1 24 16 32 23 39 2 24 30 6 23 25 27 0.10 -121 0 0 24 9 35 14 25 18.6 6 259 0 24 28 18 23 50 52 24 41 50 23 37 18 0.11 -120 0 0 24 20 53 14 25 17.9 5 259 1 24 39 33 24 2 11 24 53 5 23 48 39 0.11 -119 0 0 24 31 40 14 25 17.3 4 259 2 24 50 19 24 13 1 25 3 49 23 59 30 0.11 -118 0 0 24 41 57 14 25 16.9 3 260 2 25 0 34 24 23 20 25 14 3 24 9 50 0.12 -117 0 0 24 51 44 14 25 16.6 2 260 3 25 10 19 24 33 8 25 23 47 24 19 40 0.13 -116 0 0 25 1 1 14 25 16.4 1 261 4 25 19 35 24 42 27 25 33 1 24 29 0 0.17 -115 0 0 25 9 48 14 25 16.3 0 261 5 25 28 20 24 51 15 25 41 45 24 37 49 0.41 Uncertainty in time = +/- 3 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 5322-01235-1 * constellation : Eridanus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 04 48 42.4004 DE: -07 56 31.699 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 04 48 42.4004 DE: -07 56 31.699 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.1 * B mag [mag]: 11.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1051) Merope asteroid class: approx. diameter [km]: 67 approx. diameter ["]: 0.040 distance from Earth [AU]: 2.31900 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#69 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): 0.026", 0.006", 90.144° remarks: * orbital elements for (1051)Merope : Mean anomaly = 80.1699352335 deg Arg. of pericenter = 154.2652158373 deg Long. of node = 180.6343608938 deg Inclination = 23.4871347557 deg Eccentricity = 0.1017739840 Semimajor axis = 3.2168970017 AU Perihelion dist = 2.8895005778 AU Mag: H = 10.24, G = 0.15 Epoch of elements : MJD 60631.60609409 TDT (2024 Nov 17.6061) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#692023Apr27,4.78,2024,11,17,14.546288,0.047074,-0.079546,-6.845226,-4.051388,-0.001849,0.002660,0.000001,0.000000 157.1456,-7.8964,-41.92,-19.19,False TYC 5322-01235-1,4.81177788,-7.9421385,11.65,11.07,10.76,0.0,0,,4.83213829,-7.8964180,4.17,4.03,0,0,0 1051,Merope,15.21,67.384,2.3190,0,0,-1.747,-15.36,,3.4,0 0,80.0664,2024,11,17,154.2652,180.6344,23.4871,0.10177,3.21690,2.88950,10.23,5.0,0.15 1.362,0.0263,0.0063,90,0.0145,Known errors,1.12,0,-1,-1 20241117_1235-1,60140.70 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:51 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org