IOTA/IOTA-ES occultation update for (102) Miriam / TYC 6299-00820-1 event on 2024 Apr 07, 20:24 UT Visible from Summary ------- On 2024 Apr 07 UT, the 84.634 km diameter asteroid (102) Miriam will occult a 11.7 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 2.72 mag to 14.33 mag (the magnitude of the asteroid) for at most 3.620 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 Apr 07, 20:19 - 2024 Apr 07, 20:28 * geocentric midpoint of event [JD]: 2460408.35027466 * magnitude of target star: 11.70 * magnitude drop [mag]: 2.72 * estimated maximum duration [s]: 3.620 * Moon: 1 % sunlit, 70° distance * Sun: 83° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 87 * 1 sigma uncertainty interval [path widths]: +/- 0.05 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.002", 82°) * approx speed of asteroid's shadow [km/s]: 23.3983 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6299-00820-1 by 102 Miriam on 2024 Apr 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 56 0 0 -28 59 3 20 19 58.8 1 109 -68 -29 23 59 -28 34 9 -29 26 20 -28 31 49 .... 57 0 0 -29 16 46 20 19 58.9 2 108 -68 -29 41 40 -28 51 55 -29 44 1 -28 49 35 0.25 58 0 0 -29 34 10 20 19 59.0 3 108 -68 -29 59 2 -29 9 21 -30 1 22 -29 7 1 0.24 59 0 0 -29 51 15 20 19 59.3 3 107 -67 -30 16 4 -29 26 29 -30 18 25 -29 24 9 0.24 60 0 0 -30 8 0 20 19 59.6 4 107 -67 -30 32 47 -29 43 16 -30 35 7 -29 40 57 0.24 61 0 0 -30 24 26 20 20 0.0 5 106 -66 -30 49 10 -29 59 44 -30 51 30 -29 57 25 0.24 62 0 0 -30 40 32 20 20 0.4 6 106 -66 -31 5 14 -30 15 53 -31 7 34 -30 13 34 0.24 63 0 0 -30 56 18 20 20 0.9 7 105 -65 -31 20 58 -30 31 41 -31 23 17 -30 29 22 0.24 64 0 0 -31 11 45 20 20 1.5 8 105 -65 -31 36 22 -30 47 10 -31 38 41 -30 44 51 0.24 65 0 0 -31 26 51 20 20 2.2 9 104 -64 -31 51 25 -31 2 18 -31 53 45 -31 0 0 0.24 66 0 0 -31 41 37 20 20 2.9 10 103 -64 -32 6 9 -31 17 7 -32 8 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41 0.26 -135 0 0 - 2 37 12 20 28 36.1 17 253 77 - 3 2 32 - 2 11 55 - 3 4 56 - 2 9 32 0.26 -134 0 0 - 2 14 17 20 28 37.6 16 253 78 - 2 39 34 - 1 49 2 - 2 41 58 - 1 46 39 0.26 -133 0 0 - 1 51 37 20 28 39.0 15 253 79 - 2 16 52 - 1 26 24 - 2 19 15 - 1 24 2 0.26 -132 0 0 - 1 29 13 20 28 40.4 14 253 80 - 1 54 27 - 1 4 3 - 1 56 49 - 1 1 41 0.26 -131 0 0 - 1 7 7 20 28 41.6 13 253 81 - 1 32 18 - 0 41 59 - 1 34 40 - 0 39 37 0.26 -130 0 0 - 0 45 18 20 28 42.7 12 253 81 - 1 10 26 - 0 20 12 - 1 12 48 - 0 17 50 0.27 -129 0 0 - 0 23 46 20 28 43.8 11 253 82 - 0 48 52 0 1 17 - 0 51 14 0 3 39 0.27 -128 0 0 - 0 2 33 20 28 44.7 10 253 83 - 0 27 36 0 22 28 - 0 29 58 0 24 49 0.27 -127 0 0 0 18 22 20 28 45.5 9 253 83 - 0 6 39 0 43 21 - 0 9 1 0 45 42 0.27 -126 0 0 0 38 58 20 28 46.3 8 253 83 0 14 0 1 3 54 0 11 38 1 6 15 0.28 -125 0 0 0 59 15 20 28 46.9 7 253 83 0 34 19 1 24 9 0 31 58 1 26 30 0.28 -124 0 0 1 19 13 20 28 47.5 6 253 83 0 54 19 1 44 4 0 51 58 1 46 24 0.29 -123 0 0 1 38 50 20 28 48.0 5 253 83 1 13 59 2 3 39 1 11 38 2 5 59 0.30 -122 0 0 1 58 8 20 28 48.3 4 253 83 1 33 19 2 22 54 1 30 58 2 25 14 0.31 -121 0 0 2 17 5 20 28 48.6 3 253 82 1 52 18 2 41 48 1 49 58 2 44 8 0.34 -120 0 0 2 35 41 20 28 48.8 1 253 82 2 10 57 3 0 22 2 8 37 3 2 42 0.40 -119 0 0 2 53 56 20 28 48.9 0 253 81 2 29 14 3 18 35 2 26 54 3 20 54 0.80 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 14.3 Data for the target star ------------------------ * name: TYC 6299-00820-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 43 01.0229 DE: -16 35 23.585 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 43 01.0229 DE: -16 35 23.585 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.7 * B mag [mag]: 11.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (102) Miriam asteroid class: approx. diameter [km]: 85 approx. diameter ["]: 0.049 distance from Earth [AU]: 2.36810 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#110 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): 0.011", 0.002", 82.2° remarks: * orbital elements for (102)Miriam : Mean anomaly = 301.0025168091 deg Arg. of pericenter = 147.2970411008 deg Long. of node = 210.7654072425 deg Inclination = 5.1742162727 deg Eccentricity = 0.2508956727 Semimajor axis = 2.6627106313 AU Perihelion dist = 1.9946480563 AU Mag: H = 9.38, G = 0.15 Epoch of elements : MJD 60407.85027446 TDT (2024 Apr 07.8503) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1102023Apr24,3.62,2024,4,7,20.406592,0.066059,-0.222121,12.660913,3.757218,-0.005529,-0.000931,0.000000,0.000000 153.4034,-16.5340,-125.62,7.25,False TYC 6299-00820-1,19.71695077,-16.5898848,11.90,11.70,11.59,0.0,0,,19.73996555,-16.5339886,2.72,2.41,0,0,0 102,Miriam,14.33,84.634,2.3681,0,0,3.270,13.96,,4.8,0 0,300.8096,2024,4,7,147.2970,210.7654,5.1742,0.25090,2.66271,1.99465,9.38,5.0,0.15 1.047,0.0113,0.0016,82,0.0023,Known errors,1.06,0,-1,-1 20240407_0820-1,60139.28 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 06:42 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org