IOTA/IOTA-ES occultation update for (4179) Toutatis / UCAC4 340-188712 event on 2024 Nov 08, 12:14 UT Visible from Summary ------- On 2024 Nov 08 UT, the 2.879 km diameter asteroid (4179) Toutatis will occult a 12.0 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 6.20 mag to 18.24 mag (the magnitude of the asteroid) for at most 0.120 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: 100 * date and approx. time of event: 2024 Nov 08, 12:10 - 2024 Nov 08, 12:18 * geocentric midpoint of event [JD]: 2460623.01018250 * magnitude of target star: 12.04 * magnitude drop [mag]: 6.20 * estimated maximum duration [s]: 0.120 * Moon: 43 % sunlit, 18° distance * Sun: 64° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 3 * 1 sigma uncertainty interval [path widths]: +/- 0.08 * 1 sigma uncertainty interval [seconds]: +/- 0.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.001, +/- 0.000) * 1 sigma uncertainty ellipse (major, minor, PA): (0.001", 0.000", 75°) * approx speed of asteroid's shadow [km/s]: 24.5805 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 340-188712 by 4179 Toutatis on 2024 Nov 8 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 - 44 0 0 -34 50 56 12 10 53.6 1 117 52 -34 51 57 -34 49 56 -34 52 7 -34 49 46 .... - 43 0 0 -35 16 10 12 10 53.7 2 116 53 -35 17 10 -35 15 9 -35 17 20 -35 14 59 0.51 - 42 0 0 -35 41 11 12 10 53.9 2 116 53 -35 42 12 -35 40 11 -35 42 22 -35 40 1 0.53 - 41 0 0 -36 6 2 12 10 54.2 3 115 54 -36 7 2 -36 5 1 -36 7 12 -36 4 51 0.54 - 40 0 0 -36 30 39 12 10 54.5 4 114 55 -36 31 39 -36 29 39 -36 31 49 -36 29 29 0.55 - 39 0 0 -36 55 4 12 10 54.9 5 114 55 -36 56 4 -36 54 4 -36 56 14 -36 53 54 0.55 - 38 0 0 -37 19 15 12 10 55.4 6 113 56 -37 20 15 -37 18 15 -37 20 25 -37 18 5 0.55 - 37 0 0 -37 43 12 12 10 55.9 7 113 56 -37 44 12 -37 42 12 -37 44 22 -37 42 2 0.56 - 36 0 0 -38 6 55 12 10 56.5 8 112 57 -38 7 55 -38 5 55 -38 8 5 -38 5 45 0.56 - 35 0 0 -38 30 23 12 10 57.2 9 111 57 -38 31 23 -38 29 23 -38 31 32 -38 29 13 0.56 - 34 0 0 -38 53 35 12 10 57.9 10 111 58 -38 54 35 -38 52 35 -38 54 45 -38 52 26 0.56 - 33 0 0 -39 16 32 12 10 58.7 10 110 58 -39 17 32 -39 15 32 -39 17 42 -39 15 22 0.56 - 32 0 0 -39 39 13 12 10 59.5 11 109 58 -39 40 13 -39 38 13 -39 40 22 -39 38 3 0.56 - 31 0 0 -40 1 37 12 11 0.4 12 109 59 -40 2 37 -40 0 37 -40 2 46 -40 0 28 0.56 - 30 0 0 -40 23 44 12 11 1.4 13 108 59 -40 24 44 -40 22 45 -40 24 54 -40 22 35 0.56 - 29 0 0 -40 45 35 12 11 2.4 14 107 59 -40 46 34 -40 44 35 -40 46 44 -40 44 25 0.56 - 28 0 0 -41 7 7 12 11 3.5 15 107 60 -41 8 7 -41 6 8 -41 8 16 -41 5 58 0.56 - 27 0 0 -41 28 22 12 11 4.7 16 106 60 -41 29 22 -41 27 23 -41 29 31 -41 27 13 0.56 - 26 0 0 -41 49 19 12 11 5.9 16 105 60 -41 50 18 -41 48 20 -41 50 28 -41 48 10 0.56 - 25 0 0 -42 9 58 12 11 7.1 17 105 60 -42 10 57 -42 8 59 -42 11 7 -42 8 49 0.56 - 24 0 0 -42 30 18 12 11 8.4 18 104 60 -42 31 17 -42 29 19 -42 31 27 -42 29 9 0.56 - 23 0 0 -42 50 20 12 11 9.7 19 103 61 -42 51 18 -42 49 21 -42 51 28 -42 49 11 0.56 - 22 0 0 -43 10 2 12 11 11.1 20 102 61 -43 11 1 -43 9 3 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25 5 -38 23 5 -38 25 15 -38 22 55 0.57 115 0 0 -38 0 19 12 17 11.2 40 272 -14 -38 1 19 -37 59 19 -38 1 29 -37 59 9 0.57 116 0 0 -37 36 18 12 17 14.2 40 271 -15 -37 37 18 -37 35 18 -37 37 28 -37 35 8 0.57 117 0 0 -37 12 2 12 17 17.2 39 270 -16 -37 13 2 -37 11 2 -37 13 12 -37 10 52 0.57 118 0 0 -36 47 32 12 17 20.1 38 269 -16 -36 48 32 -36 46 31 -36 48 42 -36 46 22 0.57 119 0 0 -36 22 47 12 17 23.0 37 268 -17 -36 23 48 -36 21 47 -36 23 58 -36 21 37 0.57 120 0 0 -35 57 50 12 17 25.8 36 267 -18 -35 58 50 -35 56 50 -35 59 0 -35 56 40 0.58 121 0 0 -35 32 40 12 17 28.7 35 267 -19 -35 33 40 -35 31 39 -35 33 50 -35 31 29 0.58 122 0 0 -35 7 17 12 17 31.4 35 266 -20 -35 8 18 -35 6 17 -35 8 28 -35 6 7 0.58 123 0 0 -34 41 43 12 17 34.2 34 265 -21 -34 42 44 -34 40 43 -34 42 54 -34 40 33 0.58 124 0 0 -34 15 58 12 17 36.8 33 264 -22 -34 16 59 -34 14 57 -34 17 8 -34 14 48 0.58 125 0 0 -33 50 3 12 17 39.5 32 263 -23 -33 51 3 -33 49 2 -33 51 13 -33 48 52 0.58 126 0 0 -33 23 57 12 17 42.1 31 263 -24 -33 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-35 -28 3 31 -28 1 30 -28 3 40 -28 1 20 0.59 139 0 0 -27 35 23 12 18 10.0 19 254 -36 -27 36 24 -27 34 23 -27 36 33 -27 34 13 0.59 140 0 0 -27 8 17 12 18 11.6 18 254 -37 -27 9 17 -27 7 16 -27 9 27 -27 7 7 0.59 141 0 0 -26 41 12 12 18 13.2 17 253 -38 -26 42 12 -26 40 11 -26 42 22 -26 40 2 0.59 142 0 0 -26 14 9 12 18 14.7 16 253 -38 -26 15 9 -26 13 9 -26 15 19 -26 12 59 0.60 143 0 0 -25 47 9 12 18 16.1 15 252 -39 -25 48 9 -25 46 9 -25 48 19 -25 45 59 0.60 144 0 0 -25 20 12 12 18 17.4 14 252 -40 -25 21 12 -25 19 12 -25 21 22 -25 19 2 0.60 145 0 0 -24 53 20 12 18 18.6 13 251 -41 -24 54 20 -24 52 20 -24 54 30 -24 52 11 0.60 146 0 0 -24 26 34 12 18 19.8 12 251 -42 -24 27 34 -24 25 34 -24 27 43 -24 25 24 0.61 147 0 0 -23 59 53 12 18 20.8 11 251 -43 -24 0 53 -23 58 53 -24 1 3 -23 58 43 0.61 148 0 0 -23 33 19 12 18 21.8 10 250 -44 -23 34 19 -23 32 19 -23 34 29 -23 32 10 0.61 149 0 0 -23 6 53 12 18 22.7 9 250 -45 -23 7 52 -23 5 53 -23 8 2 -23 5 43 0.62 150 0 0 -22 40 34 12 18 23.4 8 249 -45 -22 41 34 -22 39 35 -22 41 44 -22 39 25 0.63 151 0 0 -22 14 25 12 18 24.1 7 249 -46 -22 15 25 -22 13 26 -22 15 34 -22 13 16 0.63 152 0 0 -21 48 26 12 18 24.7 6 249 -47 -21 49 25 -21 47 26 -21 49 35 -21 47 17 0.65 153 0 0 -21 22 37 12 18 25.2 5 248 -48 -21 23 36 -21 21 38 -21 23 46 -21 21 28 0.66 154 0 0 -20 56 59 12 18 25.6 4 248 -49 -20 57 58 -20 56 0 -20 58 8 -20 55 50 0.69 155 0 0 -20 31 33 12 18 25.9 3 247 -49 -20 32 32 -20 30 34 -20 32 41 -20 30 24 0.73 156 0 0 -20 6 19 12 18 26.1 2 247 -50 -20 7 18 -20 5 20 -20 7 28 -20 5 10 0.83 157 0 0 -19 41 18 12 18 26.2 1 247 -51 -19 42 17 -19 40 20 -19 42 27 -19 40 10 1.24 Uncertainty in time = +/- 0 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 340-188712 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 27 39.8608 DE: -22 07 27.704 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 27 39.8607 DE: -22 07 27.704 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 12.0 * B mag [mag]: 12.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4179) Toutatis asteroid class: approx. diameter [km]: 3 approx. diameter ["]: 0.003 distance from Earth [AU]: 1.31820 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#627 date of fit: 2023 Jun 16 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): 0.001", 0.000", 74.585° remarks: * orbital elements for (4179)Toutatis : Mean anomaly = 345.1454601547 deg Arg. of pericenter = 277.8778939161 deg Long. of node = 125.3590324696 deg Inclination = 0.4480327439 deg Eccentricity = 0.6247599226 Semimajor axis = 2.5432936735 AU Perihelion dist = 0.9543457150 AU Mag: H = 15.32, G = 0.10 Epoch of elements : MJD 60622.51018245 TDT (2024 Nov 08.5102) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#6272023Jun16,0.12,2024,11,8,12.244380,0.070197,-0.482572,13.728352,2.004427,0.002758,0.000418,-0.000002,0.000000 60.4409,-22.0751,-7.72,-16.80,False UCAC4 340-188712,19.46107252,-22.1243620,12.39,12.04,11.85,0.0,0,,19.48556372,-22.0751374,6.21,5.95,0,0,0 4179,Toutatis,18.24,2.879,1.3182,0,0,6.590,13.38,,0.0,0 0,345.0215,2024,11,8,277.8779,125.3590,0.4480,0.62476,2.54329,0.95435,15.32,5.0,0.10 1.082,0.0013,0.0002,75,0.0002,Known errors,1.20,0,-1,-1 20241108_188712,60140.69 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:29 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org