IOTA/IOTA-ES occultation update for (926) Imhilde / TYC 6185-00581-1 event on 2024 Jan 27, 23:22 UT Visible from Summary ------- On 2024 Jan 27 UT, the 49.3179381181746 km diameter asteroid (926) Imhilde will occult a 10.6 mag star in the constellation Libra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.02 mag to 15.61 mag (the magnitude of the asteroid) for at most 1.720 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 Jan 27, 23:19 - 2024 Jan 27, 23:25 * geocentric midpoint of event [JD]: 2460337.47368350 * magnitude of target star: 10.60 * magnitude drop [mag]: 5.02 * estimated maximum duration [s]: 1.720 * Moon: 95 % sunlit, 84° distance * Sun: 71° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 64 * 1 sigma uncertainty interval [path widths]: +/- 0.14 * 1 sigma uncertainty interval [seconds]: +/- 1.2 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.010) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.001", 122°) * approx speed of asteroid's shadow [km/s]: 28.7809 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6185-00581-1 by 926 Imhilde on 2024 Jan 27 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 24 0 0 -17 7 37 23 19 13.9 0 106 -53 -17 25 42 -16 49 37 -17 30 39 -16 44 44 .... 25 0 0 -17 24 35 23 19 14.0 1 106 -53 -17 42 43 -17 6 32 -17 47 40 -17 1 37 0.56 26 0 0 -17 42 4 23 19 14.1 2 105 -52 -18 0 15 -17 23 58 -18 5 13 -17 19 3 0.68 27 0 0 -18 0 6 23 19 14.4 3 105 -51 -18 18 20 -17 41 56 -18 23 19 -17 37 0 0.73 28 0 0 -18 18 39 23 19 14.7 4 105 -51 -18 36 56 -18 0 27 -18 41 56 -17 55 30 0.75 29 0 0 -18 37 44 23 19 15.1 5 104 -50 -18 56 4 -18 19 28 -19 1 5 -18 14 30 0.76 30 0 0 -18 57 20 23 19 15.6 6 104 -49 -19 15 44 -18 39 1 -19 20 46 -18 34 2 0.77 31 0 0 -19 17 27 23 19 16.1 7 104 -49 -19 35 54 -18 59 4 -19 40 57 -18 54 5 0.78 32 0 0 -19 38 4 23 19 16.8 8 103 -48 -19 56 35 -19 19 38 -20 1 39 -19 14 38 0.78 33 0 0 -19 59 12 23 19 17.6 9 103 -47 -20 17 47 -19 40 43 -20 22 51 -19 35 41 0.79 34 0 0 -20 20 50 23 19 18.4 10 103 -46 -20 39 28 -20 2 17 -20 44 34 -19 57 14 0.79 35 0 0 -20 42 57 23 19 19.3 11 102 -46 -21 1 39 -20 24 20 -21 6 46 -20 19 17 0.79 36 0 0 -21 5 33 23 19 20.4 12 102 -45 -21 24 19 -20 46 53 -21 29 27 -20 41 48 0.80 37 0 0 -21 28 38 23 19 21.5 13 102 -44 -21 47 28 -21 9 54 -21 52 37 -21 4 49 0.80 38 0 0 -21 52 11 23 19 22.6 14 101 -43 -22 11 5 -21 33 24 -22 16 15 -21 28 17 0.80 39 0 0 -22 16 12 23 19 23.9 15 101 -42 -22 35 9 -21 57 20 -22 40 20 -21 52 13 0.80 40 0 0 -22 40 40 23 19 25.3 16 100 -41 -22 59 41 -22 21 45 -23 4 53 -22 16 36 0.80 41 0 0 -23 5 35 23 19 26.7 17 100 -41 -23 24 40 -22 46 35 -23 29 53 -22 41 26 0.80 42 0 0 -23 30 56 23 19 28.3 18 99 -40 -23 50 5 -23 11 52 -23 55 19 -23 6 41 0.80 43 0 0 -23 56 42 23 19 29.9 19 99 -39 -24 15 55 -23 37 34 -24 21 11 -23 32 23 0.81 44 0 0 -24 22 53 23 19 31.6 20 98 -38 -24 42 10 -24 3 41 -24 47 27 -23 58 28 0.81 45 0 0 -24 49 28 23 19 33.3 21 98 -37 -25 8 49 -24 30 13 -25 14 7 -24 24 59 0.81 46 0 0 -25 16 27 23 19 35.2 22 97 -36 -25 35 52 -24 57 8 -25 41 11 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20 5.9 34 88 -24 -31 57 12 -31 16 45 -32 2 45 -31 11 16 0.81 60 0 0 -32 7 57 23 20 8.7 35 87 -23 -32 28 18 -31 47 43 -32 33 52 -31 42 14 0.81 61 0 0 -32 39 9 23 20 11.6 35 86 -22 -32 59 33 -32 18 52 -33 5 8 -32 13 21 0.81 62 0 0 -33 10 30 23 20 14.5 36 85 -21 -33 30 57 -32 50 9 -33 36 33 -32 44 38 0.81 63 0 0 -33 41 59 23 20 17.5 37 84 -20 -34 2 30 -33 21 35 -34 8 6 -33 16 2 0.81 64 0 0 -34 13 34 23 20 20.5 38 83 -19 -34 34 8 -33 53 7 -34 39 46 -33 47 34 0.81 65 0 0 -34 45 16 23 20 23.5 39 82 -18 -35 5 53 -34 24 46 -35 11 32 -34 19 12 0.81 66 0 0 -35 17 2 23 20 26.6 39 81 -17 -35 37 42 -34 56 29 -35 43 21 -34 50 54 0.81 67 0 0 -35 48 51 23 20 29.7 40 80 -16 -36 9 34 -35 28 15 -36 15 14 -35 22 40 0.81 68 0 0 -36 20 43 23 20 32.9 41 79 -15 -36 41 29 -36 0 5 -36 47 10 -35 54 28 0.81 69 0 0 -36 52 36 23 20 36.1 41 77 -14 -37 13 24 -36 31 55 -37 19 6 -36 26 18 0.81 70 0 0 -37 24 29 23 20 39.3 42 76 -13 -37 45 20 -37 3 46 -37 51 2 -36 58 8 0.81 71 0 0 -37 56 21 23 20 42.5 43 75 -12 -38 17 14 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8 253 44 -61 7 39 -60 30 2 -61 12 49 -60 24 56 0.86 -141 0 0 -60 35 49 23 24 55.3 8 252 44 -60 54 45 -60 16 59 -60 59 55 -60 11 52 0.86 -140 0 0 -60 22 29 23 24 55.6 7 251 43 -60 41 29 -60 3 35 -60 46 40 -59 58 27 0.87 -139 0 0 -60 8 48 23 24 55.9 7 251 43 -60 27 51 -59 49 50 -60 33 4 -59 44 41 0.87 -138 0 0 -59 54 44 23 24 56.2 6 250 43 -60 13 51 -59 35 42 -60 19 5 -59 30 32 0.88 -137 0 0 -59 40 19 23 24 56.5 5 249 43 -59 59 30 -59 21 13 -60 4 45 -59 16 2 0.89 -136 0 0 -59 25 31 23 24 56.8 5 248 43 -59 44 46 -59 6 21 -59 50 2 -59 1 9 0.90 -135 0 0 -59 10 21 23 24 57.0 4 247 43 -59 29 40 -58 51 7 -59 34 58 -58 45 54 0.91 -134 0 0 -58 54 48 23 24 57.2 4 246 43 -59 14 12 -58 35 31 -59 19 30 -58 30 16 0.92 -133 0 0 -58 38 53 23 24 57.4 3 245 42 -58 58 20 -58 19 31 -59 3 40 -58 14 16 0.95 -132 0 0 -58 22 34 23 24 57.5 3 245 42 -58 42 6 -58 3 9 -58 47 26 -57 57 52 0.98 -131 0 0 -58 5 53 23 24 57.7 2 244 42 -58 25 28 -57 46 23 -58 30 50 -57 41 6 1.03 -130 0 0 -57 48 48 23 24 57.8 1 243 42 -58 8 28 -57 29 15 -58 13 50 -57 23 56 1.13 -129 0 0 -57 31 20 23 24 57.8 1 242 41 -57 51 3 -57 11 42 -57 56 27 -57 6 22 1.39 -128 0 0 -57 13 28 23 24 57.8 0 241 41 -57 33 16 .. .. .. -57 38 40 .. .. .. 4.45 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: TYC 6185-00581-1 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 15 39 33.0491 DE: -15 14 42.200 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 15 39 33.0491 DE: -15 14 42.200 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 10.6 * B mag [mag]: 11.5 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (926) Imhilde asteroid class: approx. diameter [km]: 49 approx. diameter ["]: 0.026 distance from Earth [AU]: 2.57920 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#52 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): 0.019", 0.001", 121.709° remarks: * orbital elements for (926)Imhilde : Mean anomaly = 353.7179083620 deg Arg. of pericenter = 173.3955808347 deg Long. of node = 48.9559266083 deg Inclination = 16.3227726036 deg Eccentricity = 0.1824050850 Semimajor axis = 2.9828750147 AU Perihelion dist = 2.4387834440 AU Mag: H = 10.54, G = 0.15 Epoch of elements : MJD 60336.97368354 TDT (2024 Jan 27.9737) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr24,1.72,2024,1,27,23.368404,-0.228423,-0.585739,15.131320,-5.910536,-0.005286,0.001374,-0.000001,0.000000 117.9584,-15.3234,-167.34,-18.39,False TYC 6185-00581-1,15.65918026,-15.2450554,11.52,10.60,10.10,0.1,0,,15.68150802,-15.3234476,5.02,5.07,0,0,0 926,Imhilde,15.61,49.505,2.5792,0,0,3.567,-20.16,,2.4,0 0,353.5316,2024,1,27,173.3956,48.9559,16.3228,0.18241,2.98288,2.43878,10.54,5.0,0.15 1.136,0.0187,0.0013,122,0.0036,Known errors,0.96,0,-1,-1 20240127_0581-1,60137.03 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 12, 00:49 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org