IOTA/IOTA-ES occultation update for (4186) Tamashima / TYC 5858-01349-1 event on 2024 Nov 15, 19:50 UT Visible from Summary ------- On 2024 Nov 15 UT, the 28.9439774301672 km diameter asteroid (4186) Tamashima will occult a 10.2 mag star in the constellation Cetus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.20 mag to 16.37 mag (the magnitude of the asteroid) for at most 3.310 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 Nov 15, 19:40 - 2024 Nov 15, 20:01 * geocentric midpoint of event [JD]: 2460630.32690096 * magnitude of target star: 10.17 * magnitude drop [mag]: 6.20 * estimated maximum duration [s]: 3.310 * Moon: 100 % sunlit, 47° distance * Sun: 135° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 34 * 1 sigma uncertainty interval [path widths]: +/- 0.37 * 1 sigma uncertainty interval [seconds]: +/- 4.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.028, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.029", 0.003", 82°) * approx speed of asteroid's shadow [km/s]: 8.8351 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5858-01349-1 by 4186 Tamashima on 2024 Nov 15 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 - 65 0 0 -25 22 5 20 1 4.5 0 113 35 .. .. .. -25 32 6 .. .. .. -25 39 26 .... - 64 0 0 -25 45 50 20 1 4.4 1 113 34 -25 35 49 -25 55 51 -25 28 31 -26 3 12 0.46 - 63 0 0 -26 9 39 20 1 4.0 2 113 34 -25 59 38 -26 19 41 -25 52 19 -26 27 2 0.52 - 62 0 0 -26 33 32 20 1 3.3 3 112 33 -26 23 31 -26 43 34 -26 16 11 -26 50 56 0.54 - 61 0 0 -26 57 28 20 1 2.5 4 112 32 -26 47 27 -27 7 32 -26 40 7 -27 14 54 0.55 - 60 0 0 -27 21 28 20 1 1.3 5 111 31 -27 11 25 -27 31 31 -27 4 5 -27 38 54 0.56 - 59 0 0 -27 45 29 20 1 0.0 6 111 30 -27 35 26 -27 55 33 -27 28 6 -28 2 56 0.56 - 58 0 0 -28 9 32 20 0 58.4 7 110 29 -27 59 29 -28 19 37 -27 52 8 -28 27 0 0.56 - 57 0 0 -28 33 36 20 0 56.6 8 110 29 -28 23 32 -28 43 41 -28 16 11 -28 51 4 0.57 - 56 0 0 -28 57 40 20 0 54.5 9 109 28 -28 47 36 -29 7 45 -28 40 14 -29 15 9 0.57 - 55 0 0 -29 21 43 20 0 52.3 10 109 27 -29 11 39 -29 31 49 -29 4 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129 0 0 -38 30 44 19 40 54.5 14 254 -4 -38 20 40 -38 40 49 -38 13 19 -38 48 13 0.61 130 0 0 -38 9 12 19 40 51.5 13 253 -4 -37 59 7 -38 19 17 -37 51 46 -38 26 41 0.62 131 0 0 -37 47 27 19 40 48.7 12 253 -3 -37 37 22 -37 57 33 -37 30 0 -38 4 57 0.62 132 0 0 -37 25 30 19 40 46.0 11 252 -3 -37 15 25 -37 35 36 -37 8 2 -37 43 1 0.62 133 0 0 -37 3 21 19 40 43.5 11 252 -2 -36 53 15 -37 13 27 -36 45 52 -37 20 52 0.62 134 0 0 -36 41 0 19 40 41.2 10 251 -2 -36 30 54 -36 51 7 -36 23 31 -36 58 32 0.63 135 0 0 -36 18 28 19 40 39.1 9 250 -1 -36 8 21 -36 28 35 -36 0 58 -36 36 0 0.63 136 0 0 -35 55 44 19 40 37.2 8 250 -1 -35 45 38 -36 5 52 -35 38 15 -36 13 18 0.64 137 0 0 -35 32 51 19 40 35.4 7 249 0 -35 22 44 -35 42 59 -35 15 21 -35 50 25 0.64 138 0 0 -35 9 48 19 40 33.9 6 249 1 -34 59 41 -35 19 56 -34 52 17 -35 27 22 0.65 139 0 0 -34 46 35 19 40 32.5 5 248 1 -34 36 28 -34 56 44 -34 29 4 -35 4 10 0.66 140 0 0 -34 23 14 19 40 31.4 4 247 2 -34 13 6 -34 33 22 -34 5 42 -34 40 49 0.68 141 0 0 -33 59 44 19 40 30.5 3 247 2 -33 49 36 -34 9 52 -33 42 12 -34 17 19 0.71 142 0 0 -33 36 6 19 40 29.7 3 246 3 -33 25 58 -33 46 14 -33 18 34 -33 53 41 0.75 143 0 0 -33 12 20 19 40 29.2 2 246 4 -33 2 13 -33 22 29 -32 54 49 -33 29 55 0.85 144 0 0 -32 48 28 19 40 28.9 1 245 4 -32 38 20 -32 58 37 -32 30 56 -33 6 3 1.20 Uncertainty in time = +/- 5 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 5858-01349-1 * constellation : Cetus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 02 03 20.3945 DE: -21 13 54.037 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 02 03 20.3934 DE: -21 13 54.066 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.400,0.300) * V mag [mag]: 10.2 * B mag [mag]: 11.4 * Diameter [mas]: 0.20 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4186) Tamashima asteroid class: approx. diameter [km]: 29 approx. diameter ["]: 0.019 distance from Earth [AU]: 2.12350 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#53 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): 0.029", 0.003", 81.523° remarks: * orbital elements for (4186)Tamashima : Mean anomaly = 336.8830240229 deg Arg. of pericenter = 275.4668537156 deg Long. of node = 144.6859743599 deg Inclination = 24.0867000524 deg Eccentricity = 0.0689530680 Semimajor axis = 3.1059949347 AU Perihelion dist = 2.8918270546 AU Mag: H = 11.62, G = 0.15 Epoch of elements : MJD 60629.82689975 TDT (2024 Nov 15.8269) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr24,3.31,2024,11,15,19.845623,-0.031943,-0.514864,-4.975274,0.338645,0.001946,0.003642,0.000001,0.000000 38.0588,-21.1116,-121.50,-18.76,False TYC 5858-01349-1,2.05566514,-21.2316766,11.41,10.17,9.50,0.2,0,,2.07544263,-21.1115974,6.20,6.42,0,0,0 4186,Tamashima,16.37,29.252,2.1235,0,0,-1.472,1.41,,2.0,0 0,336.7341,2024,11,15,275.4669,144.6860,24.0867,0.06895,3.10599,2.89183,11.62,5.0,0.15 1.366,0.0287,0.0033,82,0.0070,Known errors,2.02,0,-1,-1 20241115_1349-1,60140.70 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:48 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org