IOTA/IOTA-ES occultation update for (233) Asterope / UCAC4 517-045712 event on 2024 Oct 23, 01:13 UT Visible from Summary ------- On 2024 Oct 23 UT, the 96.358 km diameter asteroid (233) Asterope will occult a 11.9 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 2.01 mag to 13.73 mag (the magnitude of the asteroid) for at most 5.880 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 Oct 23, 01:07 - 2024 Oct 23, 01:20 * geocentric midpoint of event [JD]: 2460606.55112083 * magnitude of target star: 11.91 * magnitude drop [mag]: 2.01 * estimated maximum duration [s]: 5.880 * Moon: 63 % sunlit, 20° distance * Sun: 89° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 98 * 1 sigma uncertainty interval [path widths]: +/- 0.05 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.008", 0.002", 102°) * approx speed of asteroid's shadow [km/s]: 16.3853 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 517-045712 by 233 Asterope on 2024 Oct 23 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 - 26 0 0 35 59 59 1 7 14.0 1 74 -65 35 32 26 36 27 35 35 29 36 36 30 26 .... - 25 0 0 36 13 45 1 7 14.1 1 75 -65 35 46 15 36 41 17 35 43 25 36 44 7 -0.19 - 24 0 0 36 27 5 1 7 14.3 2 75 -65 35 59 38 36 54 33 35 56 49 36 57 23 -0.19 - 23 0 0 36 39 58 1 7 14.6 3 76 -65 36 12 35 37 7 23 36 9 46 37 10 13 -0.19 - 22 0 0 36 52 25 1 7 14.9 4 76 -65 36 25 6 37 19 47 36 22 17 37 22 36 -0.19 - 21 0 0 37 4 27 1 7 15.3 5 77 -64 36 37 11 37 31 45 36 34 22 37 34 34 -0.18 - 20 0 0 37 16 2 1 7 15.9 6 78 -64 36 48 49 37 43 17 36 46 1 37 46 6 -0.18 - 19 0 0 37 27 12 1 7 16.5 6 78 -64 37 0 2 37 54 24 36 57 14 37 57 12 -0.18 - 18 0 0 37 37 56 1 7 17.1 7 79 -64 37 10 49 38 5 4 37 8 2 38 7 52 -0.18 - 17 0 0 37 48 14 1 7 17.9 8 80 -64 37 21 10 38 15 20 37 18 23 38 18 7 -0.18 - 16 0 0 37 58 6 1 7 18.7 9 80 -63 37 31 5 38 25 9 37 28 18 38 27 57 -0.18 - 15 0 0 38 7 33 1 7 19.6 10 81 -63 37 40 35 38 34 33 37 37 48 38 37 20 -0.18 - 14 0 0 38 16 34 1 7 20.6 10 81 -63 37 49 39 38 43 32 37 46 53 38 46 19 -0.18 - 13 0 0 38 25 10 1 7 21.6 11 82 -62 37 58 17 38 52 5 37 55 31 38 54 52 -0.18 - 12 0 0 38 33 21 1 7 22.7 12 83 -62 38 6 30 39 0 13 38 3 45 39 3 0 -0.18 - 11 0 0 38 41 6 1 7 23.9 13 83 -62 38 14 18 39 7 56 38 11 32 39 10 42 -0.18 - 10 0 0 38 48 26 1 7 25.2 14 84 -61 38 21 40 39 15 14 38 18 55 39 18 0 -0.18 - 9 0 0 38 55 21 1 7 26.5 14 85 -61 38 28 37 39 22 7 38 25 52 39 24 52 -0.18 - 8 0 0 39 1 50 1 7 27.9 15 85 -60 38 35 9 39 28 34 38 32 24 39 31 20 -0.18 - 7 0 0 39 7 55 1 7 29.3 16 86 -60 38 41 15 39 34 37 38 38 30 39 37 22 -0.18 - 6 0 0 39 13 35 1 7 30.9 17 86 -59 38 46 56 39 40 15 38 44 12 39 43 0 -0.18 - 5 0 0 39 18 49 1 7 32.5 18 87 -59 38 52 13 39 45 28 38 49 28 39 48 13 -0.18 - 4 0 0 39 23 39 1 7 34.1 18 88 -58 38 57 4 39 50 16 38 54 20 39 53 1 -0.18 - 3 0 0 39 28 4 1 7 35.9 19 88 -58 39 1 30 39 54 40 38 58 46 39 57 24 -0.18 - 2 0 0 39 32 4 1 7 37.7 20 89 -57 39 5 32 39 58 39 39 2 48 40 1 23 -0.18 - 1 0 0 39 35 39 1 7 39.6 21 90 -57 39 9 8 40 2 13 39 6 24 40 4 57 -0.18 0 0 0 39 38 50 1 7 41.5 21 90 -56 39 12 19 40 5 22 39 9 36 40 8 6 -0.18 1 0 0 39 41 35 1 7 43.5 22 91 -56 39 15 6 40 8 7 39 12 22 40 10 51 -0.18 2 0 0 39 43 56 1 7 45.6 23 92 -55 39 17 28 40 10 27 39 14 44 40 13 11 -0.18 3 0 0 39 45 52 1 7 47.7 24 92 -55 39 19 24 40 12 22 39 16 41 40 15 6 -0.18 4 0 0 39 47 24 1 7 49.9 25 93 -54 39 20 56 40 13 53 39 18 13 40 16 37 -0.18 5 0 0 39 48 30 1 7 52.1 25 94 -54 39 22 3 40 15 0 39 19 20 40 17 43 -0.18 6 0 0 39 49 12 1 7 54.5 26 94 -53 39 22 46 40 15 41 39 20 2 40 18 25 -0.18 7 0 0 39 49 30 1 7 56.9 27 95 -52 39 23 3 40 15 58 39 20 20 40 18 42 -0.18 8 0 0 39 49 22 1 7 59.3 28 96 -52 39 22 55 40 15 51 39 20 12 40 18 34 -0.18 9 0 0 39 48 50 1 8 1.8 28 96 -51 39 22 23 40 15 18 39 19 40 40 18 2 -0.18 10 0 0 39 47 52 1 8 4.4 29 97 -51 39 21 25 40 14 21 39 18 42 40 17 5 -0.18 11 0 0 39 46 30 1 8 7.1 30 98 -50 39 20 3 40 13 0 39 17 20 40 15 44 -0.18 12 0 0 39 44 43 1 8 9.8 31 99 -49 39 18 16 40 11 13 39 15 32 40 13 57 -0.18 13 0 0 39 42 32 1 8 12.6 32 99 -49 39 16 3 40 9 2 39 13 20 40 11 46 -0.17 14 0 0 39 39 55 1 8 15.4 32 100 -48 39 13 26 40 6 26 39 10 42 40 9 10 -0.17 15 0 0 39 36 53 1 8 18.4 33 101 -48 39 10 23 40 3 25 39 7 39 40 6 9 -0.17 16 0 0 39 33 26 1 8 21.3 34 101 -47 39 6 55 39 59 59 39 4 11 40 2 43 -0.17 17 0 0 39 29 34 1 8 24.4 35 102 -46 39 3 2 39 56 8 39 0 18 39 58 53 -0.17 18 0 0 39 25 17 1 8 27.5 35 103 -46 38 58 43 39 51 52 38 55 59 39 54 37 -0.17 19 0 0 39 20 34 1 8 30.7 36 103 -45 38 53 59 39 47 11 38 51 15 39 49 56 -0.17 20 0 0 39 15 26 1 8 33.9 37 104 -44 38 48 49 39 42 4 38 46 5 39 44 49 -0.17 21 0 0 39 9 52 1 8 37.3 38 105 -44 38 43 14 39 36 33 38 40 29 39 39 18 -0.17 22 0 0 39 3 53 1 8 40.6 39 106 -43 38 37 13 39 30 35 38 34 28 39 33 20 -0.17 23 0 0 38 57 28 1 8 44.1 39 106 -42 38 30 46 39 24 12 38 28 1 39 26 58 -0.17 24 0 0 38 50 38 1 8 47.6 40 107 -42 38 23 54 39 17 24 38 21 9 39 20 9 -0.17 25 0 0 38 43 21 1 8 51.2 41 108 -41 38 16 35 39 10 10 38 13 50 39 12 55 -0.17 26 0 0 38 35 39 1 8 54.9 42 109 -40 38 8 50 39 2 29 38 6 5 39 5 15 -0.17 27 0 0 38 27 30 1 8 58.6 42 109 -39 38 0 39 38 54 23 37 57 54 38 57 10 -0.17 28 0 0 38 18 56 1 9 2.4 43 110 -39 37 52 2 38 45 51 37 49 16 38 48 38 -0.17 29 0 0 38 9 54 1 9 6.3 44 111 -38 37 42 58 38 36 53 37 40 12 38 39 39 -0.17 30 0 0 38 0 27 1 9 10.3 45 112 -37 37 33 28 38 27 28 37 30 41 38 30 15 -0.17 31 0 0 37 50 33 1 9 14.3 46 112 -37 37 23 31 38 17 37 37 20 44 38 20 24 -0.17 32 0 0 37 40 12 1 9 18.4 47 113 -36 37 13 7 38 7 19 37 10 20 38 10 7 -0.17 33 0 0 37 29 24 1 9 22.5 47 114 -35 37 2 16 37 56 34 36 59 29 37 59 22 -0.17 34 0 0 37 18 10 1 9 26.8 48 115 -34 36 50 59 37 45 23 36 48 11 37 48 11 -0.17 35 0 0 37 6 28 1 9 31.1 49 115 -34 36 39 14 37 33 44 36 36 25 37 36 33 -0.17 36 0 0 36 54 19 1 9 35.5 50 116 -33 36 27 1 37 21 39 36 24 13 37 24 28 -0.17 37 0 0 36 41 43 1 9 40.0 51 117 -32 36 14 21 37 9 6 36 11 32 37 11 56 -0.17 38 0 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Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 517-045712 * constellation : Cancer * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 08 05 38.2019 DE: +13 13 56.225 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 08 05 38.2019 DE: +13 13 56.225 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.9 * B mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (233) Asterope asteroid class: approx. diameter [km]: 96 approx. diameter ["]: 0.052 distance from Earth [AU]: 2.56280 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#104 date of fit: 2022 Nov 25 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): 0.008", 0.002", 101.582° remarks: * orbital elements for (233)Asterope : Mean anomaly = 100.2094564739 deg Arg. of pericenter = 126.2565163575 deg Long. of node = 221.9316919232 deg Inclination = 7.6910049037 deg Eccentricity = 0.1011705233 Semimajor axis = 2.6606086035 AU Perihelion dist = 2.3914334387 AU Mag: H = 8.46, G = 0.15 Epoch of elements : MJD 60606.05112117 TDT (2024 Oct 23.0511) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1042022Nov25,5.88,2024,10,23,1.226900,0.078850,0.156373,8.263510,-4.152757,-0.005657,0.001201,0.000000,0.000000 71.3969,13.1630,157.68,-11.52,False UCAC4 517-045712,8.09394494,13.2322849,12.44,11.91,11.62,0.0,0,,8.11695814,13.1629618,2.01,1.87,0,0,0 233,Asterope,13.73,96.358,2.5628,0,0,1.942,-14.25,,5.0,0 0,99.9707,2024,10,22,126.2565,221.9317,7.6910,0.10117,2.66061,2.39143,8.46,5.0,0.15 1.052,0.0077,0.0018,102,0.0027,Known errors,1.03,0,-1,-1 20241023_045712,60140.65 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:40 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org