IOTA/IOTA-ES occultation update for (4748) Tokiwagozen / G183427.4-344858 event on 2024 Sep 05, 20:03 UT Visible from Summary ------- On 2024 Sep 05 UT, the 11.9072405506192 km diameter asteroid (4748) Tokiwagozen will occult a 7.7 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 8.61 mag to 16.35 mag (the magnitude of the asteroid) for at most 2.170 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: 71 * date and approx. time of event: 2024 Sep 05, 19:43 - 2024 Sep 05, 20:22 * geocentric midpoint of event [JD]: 2460559.33552571 * magnitude of target star: 7.74 * magnitude drop [mag]: 8.61 * estimated maximum duration [s]: 2.170 * Moon: 6 % sunlit, 85° distance * Sun: 113° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 12 * 1 sigma uncertainty interval [path widths]: +/- 0.81 * 1 sigma uncertainty interval [seconds]: +/- 5.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.020, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.021", 0.003", 105°) * approx speed of asteroid's shadow [km/s]: 5.5512 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of G183427.4-344858 by 4748 Tokiwagozen on 2024 Sep 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 - 94 0 0 - 3 56 30 19 44 0.0 1 125 65 - 4 0 31 - 3 52 30 - 4 7 1 - 3 45 59 .... - 93 0 0 - 4 38 36 19 44 0.7 2 125 64 - 4 42 37 - 4 34 35 - 4 49 8 - 4 28 5 0.16 - 92 0 0 - 5 20 44 19 44 1.8 3 125 63 - 5 24 45 - 5 16 43 - 5 31 16 - 5 10 12 0.14 - 91 0 0 - 6 2 52 19 44 3.5 5 125 62 - 6 6 53 - 5 58 51 - 6 13 24 - 5 52 20 0.13 - 90 0 0 - 6 45 0 19 44 5.8 6 124 61 - 6 49 1 - 6 40 59 - 6 55 32 - 6 34 28 0.13 - 89 0 0 - 7 27 5 19 44 8.5 7 124 59 - 7 31 6 - 7 23 4 - 7 37 37 - 7 16 33 0.12 - 88 0 0 - 8 9 6 19 44 11.8 8 124 58 - 8 13 7 - 8 5 5 - 8 19 38 - 7 58 34 0.12 - 87 0 0 - 8 51 1 19 44 15.6 9 124 57 - 8 55 2 - 8 47 0 - 9 1 33 - 8 40 29 0.12 - 86 0 0 - 9 32 49 19 44 19.9 11 124 56 - 9 36 50 - 9 28 48 - 9 43 20 - 9 22 17 0.12 - 85 0 0 -10 14 28 19 44 24.7 12 124 55 -10 18 28 -10 10 27 -10 24 59 -10 3 57 0.12 - 84 0 0 -10 55 56 19 44 30.0 13 123 53 -10 59 57 -10 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- 6 13 31 - 5 52 26 0.14 75 0 0 - 5 20 40 20 22 8.4 6 235 -69 - 5 24 41 - 5 16 39 - 5 31 12 - 5 10 7 0.15 76 0 0 - 4 38 22 20 22 10.5 4 235 -68 - 4 42 23 - 4 34 21 - 4 48 54 - 4 27 50 0.16 77 0 0 - 3 56 6 20 22 12.1 3 235 -67 - 4 0 7 - 3 52 5 - 4 6 38 - 3 45 35 0.19 78 0 0 - 3 13 54 20 22 13.1 2 235 -66 - 3 17 55 - 3 9 54 - 3 24 26 - 3 3 23 0.24 79 0 0 - 2 31 48 20 22 13.7 1 235 -65 - 2 35 48 - 2 27 47 - 2 42 19 - 2 21 17 0.49 Uncertainty in time = +/- 6 secs Prediction of 2023 Jul 15.5 Data for the target star ------------------------ * name: G183427.4-344858 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 18 34 27.4367 DE: -34 48 57.711 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 18 34 27.4360 DE: -34 48 57.712 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.300) * V mag [mag]: 7.7 * B mag [mag]: 7.9 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4748) Tokiwagozen asteroid class: approx. diameter [km]: 12 approx. diameter ["]: 0.008 distance from Earth [AU]: 2.03730 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 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): 0.021", 0.003", 105.375° remarks: * orbital elements for (4748)Tokiwagozen : Mean anomaly = 26.3981253957 deg Arg. of pericenter = 184.5262251642 deg Long. of node = 85.2878013032 deg Inclination = 16.3127566008 deg Eccentricity = 0.0567291337 Semimajor axis = 2.7435215882 AU Perihelion dist = 2.5878839851 AU Mag: H = 11.70, G = 0.15 Epoch of elements : MJD 60558.83552479 TDT (2024 Sep 05.8355) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522023Apr25,2.17,2024,9,5,20.052617,0.002546,-0.058927,3.132986,0.041848,0.005101,0.000779,0.000001,0.000000 -7.1782,-34.7985,-121.18,6.39,False G183427.4-344858,18.57428798,-34.8160309,7.85,7.74,7.68,0.1,0,,18.60182378,-34.7985326,0.63,0.52,1,0,1 4748,Tokiwagozen,16.35,12.055,2.0373,0,0,1.098,0.18,,1.2,0 0,26.2169,2024,9,5,184.5262,85.2878,16.3128,0.05673,2.74352,2.58788,11.70,5.0,0.15 1.811,0.0210,0.0032,105,0.0066,Known errors,1.15,0,-1,-1 20240905_344858,60140.54 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org