IOTA/IOTA-ES occultation update for (3775) Ellenbeth / HIP 511 event on 2024 Dec 30, 17:42 UT Visible from Summary ------- On 2024 Dec 30 UT, the 16.69810186162 km diameter asteroid (3775) Ellenbeth will occult a 7.9 mag star in the constellation Pisces for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 9.70 mag to 17.62 mag (the magnitude of the asteroid) for at most 0.690 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 Dec 30, 17:38 - 2024 Dec 30, 17:46 * geocentric midpoint of event [JD]: 2460675.23773704 * magnitude of target star: 7.92 * magnitude drop [mag]: 9.70 * estimated maximum duration [s]: 0.690 * Moon: 0 % sunlit, 86° distance * Sun: 82° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 20 * 1 sigma uncertainty interval [path widths]: +/- 0.23 * 1 sigma uncertainty interval [seconds]: +/- 1.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.020, +/- 0.012) * 1 sigma uncertainty ellipse (major, minor, PA): (0.023", 0.003", 58°) * approx speed of asteroid's shadow [km/s]: 24.6817 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 511 by 3775 Ellenbeth on 2024 Dec 30 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 - 91 0 0 -61 27 35 17 38 37.9 0 89 51 -61 32 54 -61 22 17 -61 35 24 -61 19 48 .... - 90 0 0 -61 26 52 17 38 37.9 1 88 51 -61 32 11 -61 21 34 -61 34 41 -61 19 4 0.43 - 89 0 0 -61 25 51 17 38 38.0 1 87 51 -61 31 11 -61 20 32 -61 33 40 -61 18 3 0.48 - 88 0 0 -61 24 32 17 38 38.1 2 86 52 -61 29 52 -61 19 13 -61 32 21 -61 16 44 0.50 - 87 0 0 -61 22 55 17 38 38.1 2 85 52 -61 28 15 -61 17 36 -61 30 44 -61 15 7 0.52 - 86 0 0 -61 21 0 17 38 38.3 3 84 52 -61 26 20 -61 15 41 -61 28 49 -61 13 11 0.53 - 85 0 0 -61 18 47 17 38 38.4 3 83 52 -61 24 7 -61 13 27 -61 26 36 -61 10 57 0.53 - 84 0 0 -61 16 15 17 38 38.6 4 82 52 -61 21 35 -61 10 55 -61 24 5 -61 8 25 0.54 - 83 0 0 -61 13 25 17 38 38.7 4 82 52 -61 18 45 -61 8 4 -61 21 15 -61 5 35 0.54 - 82 0 0 -61 10 16 17 38 38.9 5 81 52 -61 15 37 -61 4 56 -61 18 7 -61 2 26 0.55 - 81 0 0 -61 6 49 17 38 39.2 5 80 52 -61 12 10 -61 1 28 -61 14 41 -60 58 58 0.55 - 80 0 0 -61 3 3 17 38 39.4 6 79 52 -61 8 25 -60 57 42 -61 10 56 -60 55 12 0.55 - 79 0 0 -60 58 59 17 38 39.7 6 78 52 -61 4 21 -60 53 37 -61 6 52 -60 51 7 0.55 - 78 0 0 -60 54 36 17 38 40.0 7 77 52 -60 59 58 -60 49 13 -61 2 29 -60 46 42 0.55 - 77 0 0 -60 49 53 17 38 40.3 7 76 52 -60 55 16 -60 44 30 -60 57 48 -60 41 59 0.56 - 76 0 0 -60 44 52 17 38 40.6 8 75 52 -60 50 15 -60 39 28 -60 52 47 -60 36 57 0.56 - 75 0 0 -60 39 31 17 38 41.0 8 75 52 -60 44 55 -60 34 7 -60 47 27 -60 31 35 0.56 - 74 0 0 -60 33 50 17 38 41.4 9 74 52 -60 39 15 -60 28 26 -60 41 47 -60 25 54 0.56 - 73 0 0 -60 27 50 17 38 41.8 9 73 52 -60 33 16 -60 22 25 -60 35 48 -60 19 53 0.56 - 72 0 0 -60 21 30 17 38 42.2 10 72 52 -60 26 56 -60 16 4 -60 29 29 -60 13 32 0.56 - 71 0 0 -60 14 50 17 38 42.7 10 71 52 -60 20 17 -60 9 23 -60 22 50 -60 6 51 0.56 - 70 0 0 -60 7 50 17 38 43.2 11 70 52 -60 13 18 -60 2 23 -60 15 51 -59 59 49 0.56 - 69 0 0 -60 0 29 17 38 43.7 11 69 52 -60 5 58 -59 55 1 -60 8 32 -59 52 28 0.56 - 68 0 0 -59 52 48 17 38 44.2 12 68 52 -59 58 17 -59 47 19 -60 0 52 -59 44 45 0.56 - 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1 24 23 17 45 44.0 21 271 -52 - 1 29 51 - 1 18 55 - 1 32 25 - 1 16 21 0.60 66 0 0 - 1 11 49 17 45 45.9 20 271 -53 - 1 17 17 - 1 6 22 - 1 19 51 - 1 3 49 0.60 67 0 0 - 0 59 54 17 45 47.6 19 271 -54 - 1 5 22 - 0 54 28 - 1 7 55 - 0 51 55 0.61 68 0 0 - 0 48 38 17 45 49.3 18 271 -55 - 0 54 5 - 0 43 12 - 0 56 37 - 0 40 39 0.61 69 0 0 - 0 38 0 17 45 50.9 17 270 -56 - 0 43 26 - 0 32 35 - 0 45 59 - 0 30 2 0.61 70 0 0 - 0 28 1 17 45 52.4 16 270 -57 - 0 33 26 - 0 22 36 - 0 35 58 - 0 20 4 0.61 71 0 0 - 0 18 40 17 45 53.8 15 270 -57 - 0 24 4 - 0 13 15 - 0 26 36 - 0 10 44 0.61 72 0 0 - 0 9 57 17 45 55.1 14 270 -58 - 0 15 21 - 0 4 33 - 0 17 53 - 0 2 2 0.61 73 0 0 - 0 1 53 17 45 56.3 13 270 -59 - 0 7 16 0 3 31 - 0 9 48 0 6 2 0.61 74 0 0 0 5 33 17 45 57.4 12 270 -60 0 0 10 0 10 56 - 0 2 21 0 13 27 0.61 75 0 0 0 12 21 17 45 58.4 11 270 -60 0 6 58 0 17 44 0 4 27 0 20 15 0.62 76 0 0 0 18 31 17 45 59.4 10 270 -61 0 13 8 0 23 53 0 10 37 0 26 24 0.62 77 0 0 0 24 2 17 46 0.2 9 270 -62 0 18 40 0 29 24 0 16 9 0 31 55 0.62 78 0 0 0 28 56 17 46 0.9 8 270 -62 0 23 34 0 34 17 0 21 3 0 36 48 0.63 79 0 0 0 33 11 17 46 1.6 7 270 -63 0 27 50 0 38 32 0 25 19 0 41 3 0.63 80 0 0 0 36 49 17 46 2.2 6 270 -64 0 31 27 0 42 10 0 28 57 0 44 40 0.64 81 0 0 0 39 48 17 46 2.6 5 270 -64 0 34 27 0 45 9 0 31 57 0 47 39 0.65 82 0 0 0 42 10 17 46 3.0 4 270 -65 0 36 49 0 47 30 0 34 18 0 50 0 0.67 83 0 0 0 43 54 17 46 3.3 3 270 -65 0 38 33 0 49 14 0 36 2 0 51 44 0.70 84 0 0 0 44 59 17 46 3.5 2 270 -66 0 39 39 0 50 20 0 37 9 0 52 50 0.76 85 0 0 0 45 28 17 46 3.6 1 270 -66 0 40 7 0 50 48 0 37 37 0 53 18 1.02 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.8 Data for the target star ------------------------ * name: HIP 511 * constellation : Pisces * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 00 06 08.0751 DE: +00 07 16.893 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 00 06 08.0749 DE: +00 07 16.892 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 7.9 * B mag [mag]: 8.5 * Diameter [mas]: 0.20 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (3775) Ellenbeth asteroid class: approx. diameter [km]: 17 approx. diameter ["]: 0.011 distance from Earth [AU]: 2.17090 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 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): 0.023", 0.002", 58.142° remarks: * orbital elements for (3775)Ellenbeth : Mean anomaly = 26.7983375046 deg Arg. of pericenter = 314.2281082547 deg Long. of node = 30.3252364173 deg Inclination = 8.2419383675 deg Eccentricity = 0.2290582538 Semimajor axis = 2.7879776331 AU Perihelion dist = 2.1493683450 AU Mag: H = 13.00, G = 0.15 Epoch of elements : MJD 60674.73773737 TDT (2024 Dec 30.7377) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#492023Apr24,0.69,2024,12,30,17.705689,0.259543,-0.431476,11.943002,7.172085,0.005230,0.002262,0.000000,0.000000 -3.3875,0.2602,-84.87,-23.10,False HIP 511,0.10224310,0.1213594,8.46,7.92,7.63,0.2,0,,0.12354808,0.2601711,9.70,9.55,0,0,0 3775,Ellenbeth,17.62,17.013,2.1709,0,0,3.226,29.06,,1.4,0 0,26.6421,2024,12,30,314.2281,30.3252,8.2419,0.22906,2.78798,2.14937,13.00,5.0,0.15 1.234,0.0230,0.0025,58,0.0025,Known errors,0.96,0,-1,-1 20241230_IP_511,60140.76 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 18:16 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org