IOTA/IOTA-ES occultation update for (332) Siri / TYC 1883-00305-1 event on 2024 Sep 09, 09:26 UT Visible from Summary ------- On 2024 Sep 09 UT, the 40.653 km diameter asteroid (332) Siri will occult a 11.3 mag star in the constellation Gemini for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.08 mag to 15.36 mag (the magnitude of the asteroid) for at most 1.610 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 Sep 09, 09:22 - 2024 Sep 09, 09:29 * geocentric midpoint of event [JD]: 2460562.89325963 * magnitude of target star: 11.31 * magnitude drop [mag]: 4.08 * estimated maximum duration [s]: 1.610 * Moon: 33 % sunlit, 141° distance * Sun: 71° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 54 * 1 sigma uncertainty interval [path widths]: +/- 0.15 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.009, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.009", 0.003", 92°) * approx speed of asteroid's shadow [km/s]: 25.1799 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1883-00305-1 by 332 Siri on 2024 Sep 9 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 -142 0 0 36 26 43 9 23 6.0 1 59 -49 36 9 32 36 43 59 36 4 35 36 49 0 .... -141 0 0 36 56 59 9 23 6.1 2 59 -48 36 39 46 37 14 18 36 34 47 37 19 20 -0.76 -140 0 0 37 27 19 9 23 6.3 3 60 -48 37 10 3 37 44 40 37 5 4 37 49 43 -0.80 -139 0 0 37 57 41 9 23 6.6 4 61 -47 37 40 23 38 15 5 37 35 23 38 20 8 -0.82 -138 0 0 38 28 6 9 23 7.0 4 61 -46 38 10 45 38 45 32 38 5 45 38 50 35 -0.83 -137 0 0 38 58 31 9 23 7.5 5 62 -46 38 41 8 39 15 59 38 36 7 39 21 3 -0.84 -136 0 0 39 28 55 9 23 8.0 6 62 -45 39 11 31 39 46 26 39 6 29 39 51 31 -0.85 -135 0 0 39 59 19 9 23 8.7 7 63 -45 39 41 52 40 16 51 39 36 50 40 21 57 -0.85 -134 0 0 40 29 40 9 23 9.4 8 64 -44 40 12 12 40 47 14 40 7 9 40 52 20 -0.85 -133 0 0 40 59 57 9 23 10.2 9 64 -43 40 42 27 41 17 33 40 37 24 41 22 40 -0.85 -132 0 0 41 30 10 9 23 11.1 10 65 -43 41 12 39 41 47 47 41 7 36 41 52 55 -0.86 -131 0 0 42 0 18 9 23 12.1 11 66 -42 41 42 45 42 17 56 41 37 41 42 23 4 -0.86 -130 0 0 42 30 19 9 23 13.1 12 67 -41 42 12 45 42 47 59 42 7 41 42 53 7 -0.86 -129 0 0 43 0 13 9 23 14.2 13 67 -41 42 42 38 43 17 54 42 37 33 43 23 2 -0.86 -128 0 0 43 29 58 9 23 15.4 13 68 -40 43 12 22 43 47 40 43 7 17 43 52 48 -0.86 -127 0 0 43 59 34 9 23 16.6 14 69 -39 43 41 57 44 17 17 43 36 52 44 22 25 -0.86 -126 0 0 44 29 0 9 23 17.9 15 69 -39 44 11 22 44 46 43 44 6 17 44 51 52 -0.86 -125 0 0 44 58 14 9 23 19.3 16 70 -38 44 40 36 45 15 58 44 35 31 45 21 7 -0.86 -124 0 0 45 27 16 9 23 20.7 17 71 -37 45 9 38 45 45 0 45 4 33 45 50 9 -0.86 -123 0 0 45 56 5 9 23 22.2 18 72 -37 45 38 27 46 13 50 45 33 22 46 18 59 -0.86 -122 0 0 46 24 41 9 23 23.8 18 73 -36 46 7 3 46 42 25 46 1 57 46 47 34 -0.86 -121 0 0 46 53 2 9 23 25.4 19 73 -35 46 35 24 47 10 46 46 30 18 47 15 55 -0.87 -120 0 0 47 21 8 9 23 27.0 20 74 -34 47 3 30 47 38 51 46 58 24 47 44 0 -0.87 -119 0 0 47 48 57 9 23 28.7 21 75 -34 47 31 20 48 6 40 47 26 14 48 11 49 -0.87 -118 0 0 48 16 30 9 23 30.4 22 76 -33 47 58 53 48 34 12 47 53 48 48 39 21 -0.87 -117 0 0 48 43 45 9 23 32.2 22 77 -32 48 26 9 49 1 27 48 21 4 49 6 35 -0.87 -116 0 0 49 10 42 9 23 34.0 23 78 -31 48 53 7 49 28 23 48 48 2 49 33 31 -0.87 -115 0 0 49 37 20 9 23 35.9 24 79 -31 49 19 46 49 55 0 49 14 42 50 0 8 -0.87 -114 0 0 50 3 40 9 23 37.8 25 79 -30 49 46 7 50 21 18 49 41 3 50 26 26 -0.87 -113 0 0 50 29 39 9 23 39.7 25 80 -29 50 12 8 50 47 16 50 7 4 50 52 23 -0.87 -112 0 0 50 55 18 9 23 41.6 26 81 -29 50 37 48 51 12 54 50 32 45 51 18 0 -0.87 -111 0 0 51 20 36 9 23 43.6 27 82 -28 51 3 8 51 38 10 50 58 5 51 43 16 -0.87 -110 0 0 51 45 33 9 23 45.6 27 83 -27 51 28 7 52 3 5 51 23 5 52 8 11 -0.87 -109 0 0 52 10 9 9 23 47.6 28 84 -27 51 52 44 52 27 39 51 47 43 52 32 44 -0.87 -108 0 0 52 34 23 9 23 49.7 29 85 -26 52 17 0 52 51 51 52 11 59 52 56 55 -0.87 -107 0 0 52 58 14 9 23 51.8 29 86 -25 52 40 54 53 15 40 52 35 53 53 20 44 -0.87 -106 0 0 53 21 43 9 23 53.9 30 87 -24 53 4 25 53 39 6 52 59 25 53 44 10 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29 14 -0.88 24 0 0 58 51 15 9 28 10.2 38 256 35 58 34 45 59 7 49 58 30 0 59 12 37 -0.88 25 0 0 58 34 10 9 28 12.4 37 258 36 58 17 38 58 50 48 58 12 51 58 55 37 -0.88 26 0 0 58 16 43 9 28 14.5 37 259 36 58 0 7 58 33 23 57 55 19 58 38 14 -0.88 27 0 0 57 58 52 9 28 16.6 36 260 37 57 42 12 58 15 36 57 37 24 58 20 27 -0.88 28 0 0 57 40 37 9 28 18.7 36 261 37 57 23 55 57 57 25 57 19 5 58 2 17 -0.88 29 0 0 57 22 0 9 28 20.9 35 262 37 57 5 14 57 38 50 57 0 23 57 43 44 -0.88 30 0 0 57 2 58 9 28 23.0 35 263 38 56 46 9 57 19 52 56 41 18 57 24 47 -0.88 31 0 0 56 43 33 9 28 25.1 34 264 38 56 26 41 57 0 30 56 21 49 57 5 26 -0.88 32 0 0 56 23 44 9 28 27.3 34 265 39 56 6 49 56 40 45 56 1 56 56 45 41 -0.88 33 0 0 56 3 32 9 28 29.4 33 266 39 55 46 34 56 20 35 55 41 40 56 25 33 -0.88 34 0 0 55 42 56 9 28 31.5 33 268 39 55 25 55 56 0 2 55 21 0 56 5 0 -0.88 35 0 0 55 21 56 9 28 33.6 32 269 40 55 4 52 55 39 5 54 59 56 55 44 4 -0.88 36 0 0 55 0 33 9 28 35.7 32 270 40 54 43 26 55 17 45 54 38 30 55 22 45 -0.88 37 0 0 54 38 46 9 28 37.8 31 271 40 54 21 37 54 56 1 54 16 39 55 1 2 -0.88 38 0 0 54 16 36 9 28 39.9 30 272 41 53 59 24 54 33 54 53 54 26 54 38 55 -0.88 39 0 0 53 54 3 9 28 41.9 30 273 41 53 36 48 54 11 23 53 31 49 54 16 25 -0.88 40 0 0 53 31 6 9 28 44.0 29 274 42 53 13 49 53 48 29 53 8 50 53 53 32 -0.88 41 0 0 53 7 47 9 28 46.0 29 275 42 52 50 28 53 25 12 52 45 28 53 30 16 -0.88 42 0 0 52 44 5 9 28 48.0 28 276 42 52 26 44 53 1 32 52 21 43 53 6 37 -0.89 43 0 0 52 20 1 9 28 50.0 27 277 43 52 2 37 52 37 30 51 57 36 52 42 35 -0.89 44 0 0 51 55 35 9 28 52.0 27 278 43 51 38 9 52 13 6 51 33 7 52 18 12 -0.89 45 0 0 51 30 47 9 28 53.9 26 279 43 51 13 20 51 48 20 51 8 17 51 53 26 -0.89 46 0 0 51 5 38 9 28 55.8 25 280 43 50 48 9 51 23 13 50 43 6 51 28 19 -0.89 47 0 0 50 40 8 9 28 57.7 24 280 44 50 22 37 50 57 44 50 17 34 51 2 51 -0.89 48 0 0 50 14 18 9 28 59.6 24 281 44 49 56 45 50 31 55 49 51 42 50 37 3 -0.89 49 0 0 49 48 7 9 29 1.4 23 282 44 49 30 34 50 5 46 49 25 29 50 10 54 -0.89 50 0 0 49 21 37 9 29 3.2 22 283 44 49 4 2 49 39 17 48 58 58 49 44 25 -0.89 51 0 0 48 54 48 9 29 4.9 22 284 45 48 37 12 49 12 29 48 32 8 49 17 38 -0.89 52 0 0 48 27 41 9 29 6.6 21 285 45 48 10 4 48 45 23 48 4 59 48 50 32 -0.90 53 0 0 48 0 16 9 29 8.3 20 286 45 47 42 39 48 17 59 47 37 33 48 23 8 -0.90 54 0 0 47 32 34 9 29 9.9 19 287 45 47 14 56 47 50 17 47 9 51 47 55 26 -0.90 55 0 0 47 4 35 9 29 11.5 18 287 45 46 46 57 47 22 19 46 41 52 47 27 28 -0.90 56 0 0 46 36 21 9 29 13.0 18 288 45 46 18 43 46 54 5 46 13 38 46 59 14 -0.90 57 0 0 46 7 52 9 29 14.5 17 289 45 45 50 14 46 25 36 45 45 9 46 30 46 -0.90 58 0 0 45 39 9 9 29 15.9 16 290 46 45 21 31 45 56 53 45 16 26 46 2 3 -0.91 59 0 0 45 10 13 9 29 17.3 15 291 46 44 52 35 45 27 57 44 47 30 45 33 6 -0.91 60 0 0 44 41 4 9 29 18.6 14 291 46 44 23 27 44 58 48 44 18 21 45 3 57 -0.91 61 0 0 44 11 44 9 29 19.8 14 292 46 43 54 7 44 29 27 43 49 2 44 34 35 -0.92 62 0 0 43 42 13 9 29 21.0 13 293 46 43 24 37 43 59 55 43 19 32 44 5 4 -0.92 63 0 0 43 12 32 9 29 22.1 12 294 46 42 54 57 43 30 13 42 49 52 43 35 22 -0.92 64 0 0 42 42 43 9 29 23.1 11 294 45 42 25 8 43 0 23 42 20 4 43 5 31 -0.93 65 0 0 42 12 45 9 29 24.1 10 295 45 41 55 12 42 30 24 41 50 8 42 35 32 -0.93 66 0 0 41 42 41 9 29 24.9 9 296 45 41 25 9 42 0 19 41 20 6 42 5 26 -0.94 67 0 0 41 12 31 9 29 25.7 8 296 45 40 55 1 41 30 7 40 49 57 41 35 14 -0.95 68 0 0 40 42 16 9 29 26.5 7 297 45 40 24 47 40 59 50 40 19 44 41 4 57 -0.96 69 0 0 40 11 57 9 29 27.1 6 298 45 39 54 30 40 29 30 39 49 28 40 34 36 -0.97 70 0 0 39 41 35 9 29 27.7 6 298 44 39 24 10 39 59 6 39 19 8 40 4 12 -0.99 71 0 0 39 11 12 9 29 28.2 5 299 44 38 53 48 39 28 41 38 48 47 39 33 45 -1.01 72 0 0 38 40 47 9 29 28.6 4 300 44 38 23 26 38 58 14 38 18 26 39 3 18 -1.05 73 0 0 38 10 23 9 29 28.9 3 300 43 37 53 4 38 27 48 37 48 4 38 32 51 -1.10 74 0 0 37 40 1 9 29 29.1 2 301 43 37 22 44 37 57 23 37 17 45 38 2 26 -1.23 75 0 0 37 9 41 9 29 29.3 1 301 43 36 52 27 37 27 0 36 47 28 37 32 3 -1.61 76 0 0 .. .. .... .. .. .. .. .. .. .. .. .. 36 56 41 .. .. .. 37 1 42 .... Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.5 Data for the target star ------------------------ * name: TYC 1883-00305-1 * constellation : Gemini * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 06 25 51.4890 DE: +25 11 40.976 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 06 25 51.4891 DE: +25 11 40.976 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.3 * B mag [mag]: 11.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (332) Siri asteroid class: approx. diameter [km]: 41 approx. diameter ["]: 0.019 distance from Earth [AU]: 2.98600 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#60 date of fit: 2022 Nov 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): 0.009", 0.003", 91.766° remarks: * orbital elements for (332)Siri : Mean anomaly = 96.0270588341 deg Arg. of pericenter = 298.5479110026 deg Long. of node = 31.5142308252 deg Inclination = 2.8404358813 deg Eccentricity = 0.0899446367 Semimajor axis = 2.7758255470 AU Perihelion dist = 2.5261549267 AU Mag: H = 9.74, G = 0.15 Epoch of elements : MJD 60562.39325891 TDT (2024 Sep 09.3933) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#602022Nov25,1.61,2024,9,9,9.438231,-0.004178,0.651877,14.211971,0.091142,-0.005372,0.000317,0.000000,0.000000 -33.6537,25.1813,37.73,5.06,False TYC 1883-00305-1,6.43096913,25.1947155,11.53,11.31,11.19,0.0,0,,6.45617552,25.1813394,4.08,3.75,0,0,0 332,Siri,15.36,40.653,2.9860,0,0,3.084,0.27,,2.4,0 0,95.9432,2024,9,9,298.5479,31.5142,2.8404,0.08994,2.77583,2.52615,9.74,5.0,0.15 1.145,0.0093,0.0027,92,0.0027,Known errors,0.89,0,-1,-1 20240909_0305-1,60140.55 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:12 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org