IOTA/IOTA-ES occultation update for (725) Amanda / UCAC4 567-043893 event on 2024 Feb 18, 09:44 UT Visible from Summary ------- On 2024 Feb 18 UT, the 22.6417944676767 km diameter asteroid (725) Amanda will occult a 9.1 mag star in the constellation Cancer for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.39 mag to 15.52 mag (the magnitude of the asteroid) for at most 2.240 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 Feb 18, 09:33 - 2024 Feb 18, 09:54 * geocentric midpoint of event [JD]: 2460358.90572796 * magnitude of target star: 9.13 * magnitude drop [mag]: 6.39 * estimated maximum duration [s]: 2.240 * Moon: 69 % sunlit, 48° distance * Sun: 160° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 23 * 1 sigma uncertainty interval [path widths]: +/- 0.12 * 1 sigma uncertainty interval [seconds]: +/- 1.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.002", 105°) * approx speed of asteroid's shadow [km/s]: 10.1697 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 567-043893 by 725 Amanda on 2024 Feb 18 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 99 0 0 18 17 16 9 54 38.2 0 66 20 18 24 4 .. .. .. 18 25 38 .. .. .. .... 100 0 0 18 43 13 9 54 38.1 1 66 19 18 50 1 18 36 25 18 51 35 18 34 52 -0.18 101 0 0 19 8 50 9 54 37.8 2 66 18 19 15 37 19 2 3 19 17 11 19 0 30 -0.14 102 0 0 19 34 7 9 54 37.3 3 66 17 19 40 53 19 27 21 19 42 27 19 25 48 -0.12 103 0 0 19 59 3 9 54 36.5 4 67 16 20 5 49 19 52 17 20 7 22 19 50 44 -0.11 104 0 0 20 23 38 9 54 35.6 5 67 15 20 30 23 20 16 53 20 31 56 20 15 20 -0.11 105 0 0 20 47 51 9 54 34.5 6 68 14 20 54 35 20 41 7 20 56 8 20 39 34 -0.11 106 0 0 21 11 42 9 54 33.2 7 68 13 21 18 26 21 4 59 21 19 58 21 3 27 -0.10 107 0 0 21 35 12 9 54 31.7 8 68 12 21 41 54 21 28 30 21 43 27 21 26 57 -0.10 108 0 0 21 58 19 9 54 30.0 9 69 11 22 5 1 21 51 37 22 6 33 21 50 5 -0.10 109 0 0 22 21 4 9 54 28.2 10 69 10 22 27 45 22 14 23 22 29 17 22 12 51 -0.10 110 0 0 22 43 26 9 54 26.2 11 69 9 22 50 6 22 36 46 22 51 38 22 35 14 -0.10 111 0 0 23 5 25 9 54 24.0 12 70 8 23 12 4 22 58 45 23 13 36 22 57 14 -0.10 112 0 0 23 27 0 9 54 21.6 13 70 7 23 33 39 23 20 22 23 35 10 23 18 50 -0.10 113 0 0 23 48 13 9 54 19.1 14 71 6 23 54 51 23 41 35 23 56 22 23 40 4 -0.10 114 0 0 24 9 2 9 54 16.4 15 71 5 24 15 39 24 2 25 24 17 10 24 0 54 -0.10 115 0 0 24 29 28 9 54 13.5 16 71 4 24 36 4 24 22 52 24 37 35 24 21 21 -0.10 116 0 0 24 49 30 9 54 10.5 17 72 3 24 56 5 24 42 55 24 57 36 24 41 24 -0.10 117 0 0 25 9 8 9 54 7.3 18 72 2 25 15 42 25 2 34 25 17 13 25 1 3 -0.10 118 0 0 25 28 22 9 54 4.0 19 73 1 25 34 56 25 21 49 25 36 26 25 20 18 -0.10 119 0 0 25 47 13 9 54 0.6 20 73 0 25 53 46 25 40 40 25 55 16 25 39 10 -0.10 120 0 0 26 5 39 9 53 57.0 21 74 -1 26 12 11 25 59 7 26 13 41 25 57 37 -0.10 121 0 0 26 23 42 9 53 53.3 22 74 -2 26 30 13 26 17 10 26 31 43 26 15 41 -0.10 122 0 0 26 41 20 9 53 49.4 23 74 -3 26 47 51 26 34 50 26 49 20 26 33 20 -0.10 123 0 0 26 58 34 9 53 45.4 24 75 -3 27 5 4 26 52 5 27 6 34 26 50 35 -0.10 124 0 0 27 15 24 9 53 41.3 24 75 -4 27 21 54 27 8 55 27 23 23 27 7 26 -0.10 125 0 0 27 31 50 9 53 37.0 25 76 -5 27 38 19 27 25 22 27 39 48 27 23 53 -0.10 126 0 0 27 47 52 9 53 32.6 26 76 -6 27 54 20 27 41 25 27 55 49 27 39 56 -0.10 127 0 0 28 3 30 9 53 28.2 27 77 -7 28 9 57 27 57 3 28 11 26 27 55 34 -0.10 128 0 0 28 18 44 9 53 23.5 28 77 -8 28 25 10 28 12 17 28 26 39 28 10 49 -0.10 129 0 0 28 33 33 9 53 18.8 29 78 -9 28 39 59 28 27 8 28 41 27 28 25 39 -0.10 130 0 0 28 47 58 9 53 14.0 30 78 -10 28 54 23 28 41 34 28 55 52 28 40 5 -0.10 131 0 0 29 2 0 9 53 9.0 31 79 -11 29 8 24 28 55 36 29 9 52 28 54 7 -0.10 132 0 0 29 15 37 9 53 4.0 32 79 -12 29 22 1 29 9 14 29 23 29 29 7 45 -0.10 133 0 0 29 28 50 9 52 58.8 33 80 -12 29 35 13 29 22 27 29 36 41 29 21 0 -0.10 134 0 0 29 41 40 9 52 53.5 33 80 -13 29 48 2 29 35 17 29 49 30 29 33 50 -0.10 135 0 0 29 54 5 9 52 48.2 34 81 -14 30 0 27 29 47 43 30 1 54 29 46 16 -0.10 136 0 0 30 6 6 9 52 42.7 35 81 -15 30 12 27 29 59 45 30 13 55 29 58 18 -0.10 137 0 0 30 17 44 9 52 37.1 36 82 -16 30 24 5 30 11 24 30 25 32 30 9 56 -0.10 138 0 0 30 28 58 9 52 31.5 37 82 -17 30 35 18 30 22 38 30 36 45 30 21 11 -0.10 139 0 0 30 39 48 9 52 25.7 38 83 -18 30 46 8 30 33 29 30 47 35 30 32 2 -0.10 140 0 0 30 50 15 9 52 19.9 39 84 -18 30 56 34 30 43 56 30 58 1 30 42 29 -0.10 141 0 0 31 0 18 9 52 14.0 39 84 -19 31 6 36 30 54 0 31 8 3 30 52 33 -0.10 142 0 0 31 9 57 9 52 8.0 40 85 -20 31 16 15 31 3 39 31 17 42 31 2 13 -0.10 143 0 0 31 19 13 9 52 1.9 41 85 -21 31 25 31 31 12 56 31 26 57 31 11 29 -0.10 144 0 0 31 28 6 9 51 55.7 42 86 -22 31 34 23 31 21 49 31 35 49 31 20 22 -0.10 145 0 0 31 36 35 9 51 49.4 43 86 -23 31 42 51 31 30 18 31 44 18 31 28 52 -0.10 146 0 0 31 44 41 9 51 43.1 44 87 -23 31 50 57 31 38 25 31 52 23 31 36 58 -0.10 147 0 0 31 52 23 9 51 36.7 44 88 -24 31 58 39 31 46 8 32 0 5 31 44 41 -0.10 148 0 0 31 59 43 9 51 30.2 45 88 -25 32 5 58 31 53 27 32 7 24 31 52 1 -0.11 149 0 0 32 6 39 9 51 23.6 46 89 -26 32 12 54 32 0 24 32 14 20 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2 39 -0.10 - 95 0 0 4 41 26 9 34 58.4 27 294 -45 4 48 21 4 34 31 4 49 56 4 32 56 -0.10 - 94 0 0 4 11 44 9 34 53.1 26 294 -44 4 18 38 4 4 49 4 20 14 4 3 14 -0.10 - 93 0 0 3 42 2 9 34 48.0 24 294 -43 3 48 57 3 35 8 3 50 32 3 33 32 -0.10 - 92 0 0 3 12 22 9 34 43.1 23 294 -42 3 19 17 3 5 28 3 20 52 3 3 53 -0.10 - 91 0 0 2 42 45 9 34 38.4 22 294 -40 2 49 40 2 35 51 2 51 15 2 34 16 -0.10 - 90 0 0 2 13 12 9 34 34.0 21 294 -39 2 20 6 2 6 17 2 21 41 2 4 42 -0.10 - 89 0 0 1 43 42 9 34 29.7 20 294 -38 1 50 36 1 36 48 1 52 11 1 35 13 -0.10 - 88 0 0 1 14 17 9 34 25.7 19 294 -37 1 21 11 1 7 24 1 22 46 1 5 49 -0.10 - 87 0 0 0 44 58 9 34 21.9 18 294 -36 0 51 52 0 38 5 0 53 27 0 36 30 -0.10 - 86 0 0 0 15 46 9 34 18.3 17 294 -35 0 22 39 0 8 53 0 24 14 0 7 18 -0.10 - 85 0 0 - 0 13 20 9 34 14.9 16 294 -34 - 0 6 27 - 0 20 13 - 0 4 52 - 0 21 47 -0.10 - 84 0 0 - 0 42 17 9 34 11.8 15 294 -33 - 0 35 25 - 0 49 10 - 0 33 50 - 0 50 44 -0.10 - 83 0 0 - 1 11 6 9 34 8.8 13 294 -32 - 1 4 14 - 1 17 58 - 1 2 39 - 1 19 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34 -0.58 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 13.2 Data for the target star ------------------------ * name: UCAC4 567-043893 * constellation : Cancer * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 08 52 59.2512 DE: +23 17 44.422 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 08 52 59.2511 DE: +23 17 44.423 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 9.1 * B mag [mag]: 9.8 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (725) Amanda asteroid class: approx. diameter [km]: 23 approx. diameter ["]: 0.019 distance from Earth [AU]: 1.64360 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 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): 0.016", 0.002", 105.38° remarks: * orbital elements for (725)Amanda : Mean anomaly = 79.4355431594 deg Arg. of pericenter = 323.0984631710 deg Long. of node = 68.6497410212 deg Inclination = 3.7911412117 deg Eccentricity = 0.2219164134 Semimajor axis = 2.5715106595 AU Perihelion dist = 2.0008502370 AU Mag: H = 11.82, G = 0.15 Epoch of elements : MJD 60358.40572784 TDT (2024 Feb 18.4057) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr27,2.24,2024,2,18,9.737471,0.025528,0.105236,-5.578782,1.351013,0.001763,-0.001058,0.000001,0.000000 -160.3214,23.2041,37.43,-11.74,False UCAC4 567-043893,8.88312533,23.2956729,9.77,9.13,8.78,0.1,0,,8.90688603,23.2040908,6.39,6.28,0,0,0 725,Amanda,15.52,22.761,1.6436,0,0,-2.164,7.22,,1.4,0 0,79.3386,2024,2,18,323.0985,68.6497,3.7911,0.22192,2.57151,2.00085,11.82,5.0,0.15 1.115,0.0163,0.0021,105,0.0022,Known errors,1.06,0,-1,-1 20240218_043893,60138.18 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 13, 04:15 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org