IOTA/IOTA-ES occultation update for (1878) Hughes / TYC 5795-01201-1 event on 2024 Dec 14, 15:05 UT Visible from Summary ------- On 2024 Dec 14 UT, the 12.374 km diameter asteroid (1878) Hughes will occult a 10.9 mag star in the constellation Capricornus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.72 mag to 17.61 mag (the magnitude of the asteroid) for at most 0.390 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 14, 15:01 - 2024 Dec 14, 15:08 * geocentric midpoint of event [JD]: 2460659.12855909 * magnitude of target star: 10.89 * magnitude drop [mag]: 6.72 * estimated maximum duration [s]: 0.390 * Moon: 99 % sunlit, 110° distance * Sun: 61° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 13 * 1 sigma uncertainty interval [path widths]: +/- 0.32 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.009", 0.002", 71°) * approx speed of asteroid's shadow [km/s]: 31.6021 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5795-01201-1 by 1878 Hughes on 2024 Dec 14 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 - 75 0 0 - 9 31 44 15 1 47.8 1 103 60 - 9 35 13 - 9 28 16 - 9 37 27 - 9 26 1 .... - 74 0 0 - 9 45 14 15 1 47.8 2 103 61 - 9 48 43 - 9 41 46 - 9 50 57 - 9 39 32 -0.04 - 73 0 0 - 9 58 23 15 1 47.9 3 103 62 -10 1 51 - 9 54 55 -10 4 5 - 9 52 41 -0.08 - 72 0 0 -10 11 11 15 1 48.1 4 102 63 -10 14 38 -10 7 43 -10 16 52 -10 5 29 -0.10 - 71 0 0 -10 23 37 15 1 48.4 5 102 63 -10 27 4 -10 20 9 -10 29 18 -10 17 55 -0.11 - 70 0 0 -10 35 42 15 1 48.7 6 102 64 -10 39 9 -10 32 14 -10 41 23 -10 30 1 -0.12 - 69 0 0 -10 47 25 15 1 49.1 7 102 65 -10 50 52 -10 43 58 -10 53 5 -10 41 44 -0.12 - 68 0 0 -10 58 47 15 1 49.5 8 102 66 -11 2 13 -10 55 20 -11 4 27 -10 53 6 -0.12 - 67 0 0 -11 9 46 15 1 50.0 9 102 67 -11 13 13 -11 6 20 -11 15 26 -11 4 6 -0.13 - 66 0 0 -11 20 24 15 1 50.6 10 101 68 -11 23 50 -11 16 57 -11 26 3 -11 14 45 -0.13 - 65 0 0 -11 30 40 15 1 51.2 11 101 69 -11 34 6 -11 27 13 -11 36 19 -11 25 1 -0.13 - 64 0 0 -11 40 33 15 1 51.9 12 101 70 -11 43 59 -11 37 7 -11 46 12 -11 34 54 -0.13 - 63 0 0 -11 50 4 15 1 52.6 13 101 71 -11 53 30 -11 46 38 -11 55 43 -11 44 26 -0.13 - 62 0 0 -11 59 13 15 1 53.4 14 101 72 -12 2 39 -11 55 47 -12 4 51 -11 53 35 -0.13 - 61 0 0 -12 7 59 15 1 54.3 15 100 72 -12 11 25 -12 4 34 -12 13 37 -12 2 22 -0.14 - 60 0 0 -12 16 23 15 1 55.2 16 100 73 -12 19 48 -12 12 58 -12 22 1 -12 10 46 -0.14 - 59 0 0 -12 24 24 15 1 56.2 17 100 74 -12 27 49 -12 20 59 -12 30 1 -12 18 47 -0.14 - 58 0 0 -12 32 2 15 1 57.2 18 100 75 -12 35 27 -12 28 37 -12 37 39 -12 26 25 -0.14 - 57 0 0 -12 39 18 15 1 58.3 18 100 76 -12 42 43 -12 35 53 -12 44 55 -12 33 41 -0.14 - 56 0 0 -12 46 11 15 1 59.4 19 99 76 -12 49 35 -12 42 46 -12 51 47 -12 40 34 -0.14 - 55 0 0 -12 52 40 15 2 0.6 20 99 77 -12 56 5 -12 49 16 -12 58 16 -12 47 4 -0.14 - 54 0 0 -12 58 47 15 2 1.9 21 99 78 -13 2 11 -12 55 23 -13 4 23 -12 53 11 -0.14 - 53 0 0 -13 4 31 15 2 3.2 22 99 78 -13 7 55 -13 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-36 18 14 15 18 21 29 18 11 56 18 23 48 -0.14 75 0 0 18 38 53 15 8 10.8 23 247 -37 18 35 16 18 42 29 18 32 57 18 44 49 -0.14 76 0 0 18 59 39 15 8 12.2 22 247 -38 18 56 3 19 3 15 18 53 44 19 5 34 -0.14 77 0 0 19 20 10 15 8 13.5 21 247 -39 19 16 34 19 23 46 19 14 15 19 26 5 -0.14 78 0 0 19 40 26 15 8 14.8 20 248 -40 19 36 50 19 44 2 19 34 31 19 46 20 -0.14 79 0 0 20 0 26 15 8 15.9 19 248 -41 19 56 51 20 4 1 19 54 32 20 6 20 -0.14 80 0 0 20 20 10 15 8 17.1 18 248 -42 20 16 35 20 23 45 20 14 17 20 26 4 -0.14 81 0 0 20 39 38 15 8 18.1 17 249 -43 20 36 3 20 43 13 20 33 45 20 45 31 -0.14 82 0 0 20 58 49 15 8 19.1 16 249 -44 20 55 15 21 2 24 20 52 57 21 4 42 -0.14 83 0 0 21 17 44 15 8 20.1 15 249 -45 21 14 10 21 21 18 21 11 52 21 23 36 -0.14 84 0 0 21 36 21 15 8 21.0 14 250 -46 21 32 47 21 39 55 21 30 30 21 42 13 -0.14 85 0 0 21 54 41 15 8 21.8 13 250 -47 21 51 8 21 58 15 21 48 50 22 0 33 -0.14 86 0 0 22 12 44 15 8 22.5 12 251 -48 22 9 11 22 16 17 22 6 53 22 18 35 -0.14 87 0 0 22 30 29 15 8 23.2 11 251 -49 22 26 56 22 34 2 22 24 38 22 36 19 -0.14 88 0 0 22 47 55 15 8 23.9 10 251 -50 22 44 23 22 51 28 22 42 6 22 53 45 -0.14 89 0 0 23 5 4 15 8 24.4 9 252 -51 23 1 32 23 8 37 22 59 15 23 10 53 -0.14 90 0 0 23 21 54 15 8 25.0 8 252 -52 23 18 22 23 25 26 23 16 5 23 27 43 -0.14 91 0 0 23 38 26 15 8 25.4 7 252 -53 23 34 54 23 41 58 23 32 38 23 44 14 -0.14 92 0 0 23 54 39 15 8 25.8 6 253 -54 23 51 7 23 58 11 23 48 51 24 0 27 -0.14 93 0 0 24 10 33 15 8 26.2 5 253 -55 24 7 2 24 14 4 24 4 46 24 16 20 -0.14 94 0 0 24 26 8 15 8 26.5 4 254 -56 24 22 37 24 29 39 24 20 21 24 31 55 -0.14 95 0 0 24 41 24 15 8 26.7 3 254 -57 24 37 53 24 44 55 24 35 38 24 47 10 -0.13 96 0 0 24 56 21 15 8 26.9 3 255 -57 24 52 50 24 59 51 24 50 35 25 2 7 -0.13 97 0 0 25 10 58 15 8 27.0 2 255 -58 25 7 28 25 14 28 25 5 13 25 16 43 -0.13 98 0 0 25 25 16 15 8 27.0 1 255 -59 25 21 46 25 28 46 25 19 31 25 31 1 -0.11 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 5795-01201-1 * constellation : Capricornus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 21 42 07.6578 DE: -13 01 22.004 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 21 42 07.6576 DE: -13 01 22.005 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 10.9 * B mag [mag]: 11.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1878) Hughes asteroid class: approx. diameter [km]: 12 approx. diameter ["]: 0.005 distance from Earth [AU]: 3.22580 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): 0.009", 0.002", 71.343° remarks: * orbital elements for (1878)Hughes : Mean anomaly = 218.6733387633 deg Arg. of pericenter = 295.3349729666 deg Long. of node = 187.7584132263 deg Inclination = 1.7833129799 deg Eccentricity = 0.0135714471 Semimajor axis = 2.8443959380 AU Perihelion dist = 2.8057933690 AU Mag: H = 11.86, G = 0.15 Epoch of elements : MJD 60658.62855883 TDT (2024 Dec 14.6286) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#492023Apr24,0.39,2024,12,14,15.085418,-0.043915,0.137050,16.976748,5.472827,0.004870,0.001734,-0.000001,0.000000 15.8086,-12.9103,-47.54,-23.26,False TYC 5795-01201-1,21.70212719,-13.0227786,11.15,10.89,10.75,0.0,0,,21.72446516,-12.9103283,6.72,6.41,0,0,0 1878,Hughes,17.61,12.374,3.2258,0,0,3.166,14.93,,1.0,0 0,218.5442,2024,12,14,295.3350,187.7584,1.7833,0.01357,2.84440,2.80579,11.86,5.0,0.15 1.322,0.0090,0.0017,71,0.0017,Known errors,1.02,0,-1,-1 20241214_1201-1,60140.74 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:45 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org