IOTA/IOTA-ES occultation update for (25846) 2000 EF93 / UCAC4 372-092608 event on 2024 Mar 05, 18:08 UT Visible from Summary ------- On 2024 Mar 05 UT, the 13.6319271238219 km diameter asteroid (25846) 2000 EF93 will occult a 10.8 mag star in the constellation Serpens for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 8.07 mag to 18.84 mag (the magnitude of the asteroid) for at most 0.750 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 Mar 05, 18:03 - 2024 Mar 05, 18:13 * geocentric midpoint of event [JD]: 2460375.25598370 * magnitude of target star: 10.77 * magnitude drop [mag]: 8.07 * estimated maximum duration [s]: 0.750 * Moon: 28 % sunlit, 21° distance * Sun: 81° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 17 * 1 sigma uncertainty interval [path widths]: +/- 0.35 * 1 sigma uncertainty interval [seconds]: +/- 1.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.001", 81°) * approx speed of asteroid's shadow [km/s]: 21.1425 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 372-092608 by 25846 2000 EF93 on 2024 Mar 5 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 89 0 0 -35 55 28 18 3 54.6 1 109 -48 -36 0 18 -35 50 38 -36 3 39 -35 47 17 - 35 59 2 - 35 51 54 .... 90 0 0 -36 12 14 18 3 54.7 2 108 -48 -36 17 4 -36 7 25 -36 20 25 -36 4 4 - 36 15 48 - 36 8 41 0.35 91 0 0 -36 28 42 18 3 54.9 2 108 -48 -36 33 31 -36 23 54 -36 36 52 -36 20 33 - 36 32 16 - 36 25 9 0.36 92 0 0 -36 44 51 18 3 55.1 3 107 -48 -36 49 40 -36 40 3 -36 53 0 -36 36 43 - 36 48 24 - 36 41 18 0.37 93 0 0 -37 0 42 18 3 55.4 4 106 -47 -37 5 30 -36 55 54 -37 8 50 -36 52 34 - 37 4 14 - 36 57 9 0.37 94 0 0 -37 16 13 18 3 55.8 5 106 -47 -37 21 1 -37 11 26 -37 24 21 -37 8 6 - 37 19 46 - 37 12 41 0.37 95 0 0 -37 31 26 18 3 56.3 6 105 -47 -37 36 12 -37 26 39 -37 39 32 -37 23 19 - 37 34 58 - 37 27 54 0.37 96 0 0 -37 46 19 18 3 56.8 7 105 -47 -37 51 5 -37 41 32 -37 54 25 -37 38 13 - 37 49 50 - 37 42 47 0.37 97 0 0 -38 0 53 18 3 57.4 7 104 -46 -38 5 39 -37 56 7 -38 8 58 -37 52 48 - 38 4 24 - 37 57 22 0.37 98 0 0 -38 15 8 18 3 58.0 8 103 -46 -38 19 53 -38 10 22 -38 23 12 -38 7 4 - 38 18 38 - 38 11 37 0.37 99 0 0 -38 29 3 18 3 58.7 9 103 -45 -38 33 48 -38 24 18 -38 37 6 -38 21 0 - 38 32 33 - 38 25 32 0.37 100 0 0 -38 42 39 18 3 59.5 10 102 -45 -38 47 23 -38 37 54 -38 50 41 -38 34 37 - 38 46 9 - 38 39 9 0.37 101 0 0 -38 55 55 18 4 0.3 11 101 -45 -39 0 39 -38 51 11 -39 3 57 -38 47 54 - 38 59 25 - 38 52 26 0.37 102 0 0 -39 8 52 18 4 1.2 12 101 -44 -39 13 36 -39 4 9 -39 16 53 -39 0 52 - 39 12 22 - 39 5 23 0.37 103 0 0 -39 21 30 18 4 2.1 12 100 -44 -39 26 13 -39 16 47 -39 29 30 -39 13 30 - 39 24 59 - 39 18 1 0.37 104 0 0 -39 33 48 18 4 3.1 13 100 -44 -39 38 30 -39 29 5 -39 41 47 -39 25 49 - 39 37 17 - 39 30 19 0.37 105 0 0 -39 45 46 18 4 4.2 14 99 -43 -39 50 28 -39 41 4 -39 53 45 -39 37 48 - 39 49 15 - 39 42 18 0.37 106 0 0 -39 57 25 18 4 5.3 15 98 -43 -40 2 6 -39 52 43 -40 5 23 -39 49 27 - 40 0 53 - 39 53 57 0.37 107 0 0 -40 8 44 18 4 6.4 15 98 -42 -40 13 25 -40 4 3 -40 16 41 -40 0 47 - 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11 1 55 - 10 54 39 0.39 -102 0 0 -10 34 57 18 12 57.4 21 257 78 -10 39 51 -10 30 2 -10 43 17 -10 26 37 - 10 38 35 - 10 31 19 0.40 -101 0 0 -10 11 51 18 12 59.5 20 257 79 -10 16 45 -10 6 57 -10 20 10 -10 3 32 - 10 15 28 - 10 8 13 0.40 -100 0 0 - 9 49 0 18 13 1.5 19 257 80 - 9 53 53 - 9 44 6 - 9 57 18 - 9 40 42 - 9 52 37 - 9 45 22 0.40 - 99 0 0 - 9 26 24 18 13 3.4 18 257 81 - 9 31 17 - 9 21 30 - 9 34 41 - 9 18 6 - 9 30 0 - 9 22 47 0.40 - 98 0 0 - 9 4 3 18 13 5.2 17 256 82 - 9 8 56 - 8 59 10 - 9 12 20 - 8 55 47 - 9 7 40 - 9 0 27 0.40 - 97 0 0 - 8 41 59 18 13 6.9 16 256 83 - 8 46 52 - 8 37 7 - 8 50 15 - 8 33 44 - 8 45 35 - 8 38 23 0.40 - 96 0 0 - 8 20 12 18 13 8.5 15 256 84 - 8 25 4 - 8 15 20 - 8 28 27 - 8 11 57 - 8 23 48 - 8 16 36 0.40 - 95 0 0 - 7 58 42 18 13 10.0 14 256 85 - 8 3 33 - 7 53 50 - 8 6 56 - 7 50 28 - 8 2 17 - 7 55 6 0.40 - 94 0 0 - 7 37 29 18 13 11.4 13 256 86 - 7 42 20 - 7 32 38 - 7 45 43 - 7 29 16 - 7 41 4 - 7 33 54 0.41 - 93 0 0 - 7 16 34 18 13 12.7 12 255 87 - 7 21 25 - 7 11 44 - 7 24 47 - 7 8 22 - 7 20 9 - 7 13 0 0.41 - 92 0 0 - 6 55 58 18 13 13.8 11 255 88 - 7 0 48 - 6 51 8 - 7 4 10 - 6 47 47 - 6 59 33 - 6 52 24 0.41 - 91 0 0 - 6 35 41 18 13 14.9 10 255 89 - 6 40 30 - 6 30 52 - 6 43 52 - 6 27 30 - 6 39 15 - 6 32 7 0.41 - 90 0 0 - 6 15 43 18 13 15.8 9 255 89 - 6 20 32 - 6 10 54 - 6 23 53 - 6 7 33 - 6 19 16 - 6 12 9 0.42 - 89 0 0 - 5 56 4 18 13 16.7 8 255 88 - 6 0 53 - 5 51 16 - 6 4 14 - 5 47 55 - 5 59 37 - 5 52 31 0.42 - 88 0 0 - 5 36 46 18 13 17.4 7 255 87 - 5 41 34 - 5 31 58 - 5 44 54 - 5 28 37 - 5 40 18 - 5 33 13 0.43 - 87 0 0 - 5 17 47 18 13 18.0 6 255 86 - 5 22 35 - 5 13 0 - 5 25 55 - 5 9 40 - 5 21 20 - 5 14 15 0.44 - 86 0 0 - 4 59 9 18 13 18.6 5 255 85 - 5 3 56 - 4 54 22 - 5 7 16 - 4 51 3 - 5 2 41 - 4 55 37 0.45 - 85 0 0 - 4 40 52 18 13 19.0 3 255 84 - 4 45 39 - 4 36 6 - 4 48 59 - 4 32 47 - 4 44 24 - 4 37 21 0.47 - 84 0 0 - 4 22 57 18 13 19.3 2 255 83 - 4 27 43 - 4 18 11 - 4 31 2 - 4 14 52 - 4 26 28 - 4 19 25 0.50 - 83 0 0 - 4 5 22 18 13 19.5 1 254 82 - 4 10 8 - 4 0 37 - 4 13 27 - 3 57 18 - 4 8 53 - 4 1 51 0.60 - 82 0 0 - 3 48 10 18 13 19.6 0 254 81 - 3 52 55 - 3 43 25 - 3 56 14 - 3 40 7 - 3 51 41 - 3 44 39 1.20 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 14.2 Data for the target star ------------------------ * name: UCAC4 372-092608 * constellation : Serpens * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 17 37 09.8983 DE: -15 36 26.607 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 17 37 09.8983 DE: -15 36 26.607 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 10.8 * B mag [mag]: 13.0 * Diameter [mas]: 0.90 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (25846) 2000 EF93 asteroid class: approx. diameter [km]: 14 approx. diameter ["]: 0.006 distance from Earth [AU]: 3.25560 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#49 date of fit: 2023 Apr 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): 0.016", 0.001", 81.3° remarks: * orbital elements for (25846)2000 EF93 : Mean anomaly = 94.9605112381 deg Arg. of pericenter = 286.2128603558 deg Long. of node = 215.1117087110 deg Inclination = 14.5136262718 deg Eccentricity = 0.1007461967 Semimajor axis = 3.1915552047 AU Perihelion dist = 2.8700181563 AU Mag: H = 12.81, G = 0.15 Epoch of elements : MJD 60374.75598362 TDT (2024 Mar 05.7560) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#492023Apr25,0.75,2024,3,5,18.143609,0.100253,-0.334597,11.434620,3.414039,-0.005874,0.000356,0.000000,0.000000 -171.4961,-15.6236,-89.33,-5.65,False UCAC4 372-092608,17.61941617,-15.6073907,12.97,10.77,9.58,0.9,4,,17.64240613,-15.6235632,8.07,8.81,0,0,0 25846,2000 EF93,18.84,15.757,3.2556,0,0,2.139,9.22,,1.4,0 0,94.8298,2024,3,5,286.2129,215.1117,14.5136,0.10075,3.19156,2.87002,12.80,5.0,0.15 1.348,0.0160,0.0007,81,0.0023,Known errors,0.70,0,-1,-1 20240305_092608,60139.21 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 05:09 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org