IOTA/IOTA-ES occultation update for (2759) Idomeneus / TYC 4821-00309-1 event on 2023 Dec 10, 08:17 UT Visible from South America Summary ------- On 2023 Dec 10 UT, the 54.6 km diameter asteroid (2759) Idomeneus will occult a 9.9 mag star in the constellation Monoceros for observers along a path across South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 7.41 mag to 17.32 mag (the magnitude of the asteroid) for at most 4.400 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: 2023 Dec 10, 08:08 - 2023 Dec 10, 08:26 * geocentric midpoint of event [JD]: 2460288.84551075 * magnitude of target star: 9.91 * magnitude drop [mag]: 7.41 * estimated maximum duration [s]: 4.400 * Moon: 8 % sunlit, 109° distance * Sun: 138° distance * rough path description: South America The occultation path -------------------- * approximate projected width [km]: 55 * 1 sigma uncertainty interval [path widths]: +/- 0.19 * 1 sigma uncertainty interval [seconds]: +/- 4.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.020, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.020", 0.001", 88°) * approx speed of asteroid's shadow [km/s]: 12.4149 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 4821-00309-1 by 2759 Idomeneus on 2023 Dec 10 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 176 0 0 -19 35 33 8 26 0.5 0 92 -21 -19 20 36 -19 50 31 -19 14 57 -19 56 10 .... 177 0 0 -19 37 36 8 26 0.4 1 92 -22 -19 22 39 -19 52 34 -19 17 0 -19 58 13 0.10 178 0 0 -19 39 28 8 26 0.1 2 91 -23 -19 24 30 -19 54 25 -19 18 52 -20 0 4 0.12 179 0 0 -19 41 7 8 25 59.7 3 91 -23 -19 26 10 -19 56 4 -19 20 31 -20 1 44 0.12 -180 0 0 -19 42 34 8 25 59.1 4 91 -24 -19 27 37 -19 57 31 -19 21 58 -20 3 11 0.13 -179 0 0 -19 43 49 8 25 58.4 5 90 -25 -19 28 52 -19 58 47 -19 23 14 -20 4 26 0.13 -178 0 0 -19 44 53 8 25 57.6 6 90 -26 -19 29 56 -19 59 50 -19 24 17 -20 5 29 0.13 -177 0 0 -19 45 44 8 25 56.6 7 90 -26 -19 30 47 -20 0 41 -19 25 8 -20 6 20 0.13 -176 0 0 -19 46 23 8 25 55.5 8 89 -27 -19 31 27 -20 1 21 -19 25 48 -20 7 0 0.13 -175 0 0 -19 46 51 8 25 54.2 9 89 -28 -19 31 54 -20 1 48 -19 26 16 -20 7 27 0.14 -174 0 0 -19 47 7 8 25 52.8 10 89 -28 -19 32 10 -20 2 4 -19 26 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0 0 -19 32 39 8 25 22.7 22 84 -37 -19 17 41 -19 47 37 -19 12 2 -19 53 17 0.14 -160 0 0 -19 30 11 8 25 19.5 23 84 -38 -19 15 13 -19 45 9 -19 9 34 -19 50 49 0.14 -159 0 0 -19 27 31 8 25 16.2 24 84 -38 -19 12 33 -19 42 30 -19 6 54 -19 48 9 0.14 -158 0 0 -19 24 40 8 25 12.7 25 83 -39 -19 9 42 -19 39 39 -19 4 3 -19 45 19 0.14 -157 0 0 -19 21 38 8 25 9.1 26 83 -39 -19 6 40 -19 36 37 -19 1 0 -19 42 17 0.14 -156 0 0 -19 18 25 8 25 5.4 27 83 -40 -19 3 26 -19 33 24 -18 57 47 -19 39 4 0.14 -155 0 0 -19 15 0 8 25 1.5 28 82 -40 -19 0 1 -19 29 59 -18 54 22 -19 35 39 0.14 -154 0 0 -19 11 24 8 24 57.6 28 82 -41 -18 56 25 -19 26 24 -18 50 46 -19 32 4 0.14 -153 0 0 -19 7 38 8 24 53.5 29 81 -42 -18 52 38 -19 22 37 -18 46 59 -19 28 17 0.14 -152 0 0 -19 3 40 8 24 49.3 30 81 -42 -18 48 40 -19 18 40 -18 43 1 -19 24 20 0.14 -151 0 0 -18 59 31 8 24 45.0 31 81 -43 -18 44 31 -19 14 31 -18 38 52 -19 20 11 0.14 -150 0 0 -18 55 11 8 24 40.5 32 80 -43 -18 40 12 -19 10 12 -18 34 32 -19 15 52 0.14 -149 0 0 -18 50 41 8 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22.1 52 270 -15 - 2 34 19 - 3 4 41 - 2 28 35 - 3 10 26 0.14 - 51 0 0 - 2 38 54 8 12 15.1 51 270 -14 - 2 23 43 - 2 54 5 - 2 17 59 - 2 59 50 0.14 - 50 0 0 - 2 28 24 8 12 8.2 50 270 -13 - 2 13 13 - 2 43 34 - 2 7 29 - 2 49 19 0.14 - 49 0 0 - 2 17 59 8 12 1.5 49 269 -12 - 2 2 49 - 2 33 10 - 1 57 5 - 2 38 54 0.14 - 48 0 0 - 2 7 41 8 11 54.8 48 269 -11 - 1 52 31 - 2 22 51 - 1 46 47 - 2 28 35 0.14 - 47 0 0 - 1 57 29 8 11 48.2 47 269 -10 - 1 42 19 - 2 12 39 - 1 36 36 - 2 18 23 0.14 - 46 0 0 - 1 47 23 8 11 41.8 46 269 -10 - 1 32 14 - 2 2 33 - 1 26 30 - 2 8 17 0.14 - 45 0 0 - 1 37 24 8 11 35.4 45 269 -9 - 1 22 15 - 1 52 34 - 1 16 32 - 1 58 18 0.14 - 44 0 0 - 1 27 32 8 11 29.1 44 268 -8 - 1 12 24 - 1 42 42 - 1 6 40 - 1 48 25 0.14 - 43 0 0 - 1 17 47 8 11 23.0 43 268 -7 - 1 2 39 - 1 32 56 - 0 56 56 - 1 38 40 0.14 - 42 0 0 - 1 8 10 8 11 17.0 42 268 -6 - 0 53 1 - 1 23 18 - 0 47 18 - 1 29 2 0.14 - 41 0 0 - 0 58 39 8 11 11.0 41 268 -5 - 0 43 31 - 1 13 48 - 0 37 49 - 1 19 31 0.14 - 40 0 0 - 0 49 17 8 11 5.2 40 268 -5 - 0 34 9 - 1 4 25 - 0 28 26 - 1 10 8 0.14 - 39 0 0 - 0 40 2 8 10 59.5 39 268 -4 - 0 24 54 - 0 55 9 - 0 19 12 - 1 0 53 0.14 - 38 0 0 - 0 30 54 8 10 54.0 38 268 -3 - 0 15 47 - 0 46 2 - 0 10 5 - 0 51 45 0.14 - 37 0 0 - 0 21 55 8 10 48.5 37 268 -2 - 0 6 49 - 0 37 3 - 0 1 6 - 0 42 46 0.14 - 36 0 0 - 0 13 5 8 10 43.2 36 268 -1 0 2 2 - 0 28 11 0 7 44 - 0 33 54 0.14 - 35 0 0 - 0 4 22 8 10 38.0 35 267 0 0 10 44 - 0 19 29 0 16 26 - 0 25 11 0.14 - 34 0 0 0 4 12 8 10 32.9 34 267 0 0 19 18 - 0 10 55 0 25 0 - 0 16 37 0.14 - 33 0 0 0 12 37 8 10 27.9 33 267 1 0 27 42 - 0 2 29 0 33 24 - 0 8 12 0.14 - 32 0 0 0 20 53 8 10 23.1 32 267 2 0 35 58 0 5 47 0 41 40 0 0 5 0.14 - 31 0 0 0 29 0 8 10 18.4 31 267 3 0 44 5 0 13 55 0 49 47 0 8 13 0.14 - 30 0 0 0 36 58 8 10 13.8 30 267 4 0 52 3 0 21 53 0 57 45 0 16 11 0.14 - 29 0 0 0 44 47 8 10 9.4 29 267 5 0 59 51 0 29 42 1 5 33 0 24 0 0.14 - 28 0 0 0 52 26 8 10 5.1 28 267 6 1 7 30 0 37 22 1 13 12 0 31 40 0.14 - 27 0 0 0 59 56 8 10 0.9 27 267 6 1 15 0 0 44 52 1 20 41 0 39 10 0.14 - 26 0 0 1 7 16 8 9 56.9 26 267 7 1 22 19 0 52 12 1 28 1 0 46 30 0.14 - 25 0 0 1 14 26 8 9 53.0 25 267 8 1 29 29 0 59 22 1 35 10 0 53 41 0.14 - 24 0 0 1 21 26 8 9 49.2 24 267 9 1 36 29 1 6 22 1 42 10 1 0 41 0.14 - 23 0 0 1 28 16 8 9 45.6 23 267 10 1 43 18 1 13 12 1 48 59 1 7 31 0.14 - 22 0 0 1 34 55 8 9 42.2 22 267 11 1 49 57 1 19 52 1 55 38 1 14 11 0.14 - 21 0 0 1 41 24 8 9 38.8 21 267 12 1 56 26 1 26 22 2 2 7 1 20 40 0.14 - 20 0 0 1 47 43 8 9 35.6 20 267 12 2 2 45 1 32 40 2 8 25 1 26 59 0.14 - 19 0 0 1 53 51 8 9 32.6 19 267 13 2 8 52 1 38 49 2 14 33 1 33 8 0.14 - 18 0 0 1 59 48 8 9 29.7 18 267 14 2 14 49 1 44 46 2 20 29 1 39 5 0.14 - 17 0 0 2 5 34 8 9 27.0 17 267 15 2 20 35 1 50 32 2 26 15 1 44 52 0.15 - 16 0 0 2 11 9 8 9 24.4 16 267 16 2 26 10 1 56 8 2 31 50 1 50 27 0.15 - 15 0 0 2 16 33 8 9 21.9 15 267 17 2 31 34 2 1 32 2 37 14 1 55 52 0.15 - 14 0 0 2 21 46 8 9 19.6 14 267 18 2 36 47 2 6 45 2 42 27 2 1 5 0.15 - 13 0 0 2 26 48 8 9 17.5 13 267 18 2 41 48 2 11 47 2 47 28 2 6 7 0.15 - 12 0 0 2 31 38 8 9 15.5 12 267 19 2 46 38 2 16 37 2 52 18 2 10 57 0.15 - 11 0 0 2 36 16 8 9 13.6 11 267 20 2 51 16 2 21 16 2 56 56 2 15 36 0.15 - 10 0 0 2 40 43 8 9 11.9 10 267 21 2 55 43 2 25 43 3 1 23 2 20 3 0.15 - 9 0 0 2 44 59 8 9 10.4 9 267 22 2 59 58 2 29 59 3 5 38 2 24 19 0.15 - 8 0 0 2 49 2 8 9 9.0 8 267 23 3 4 1 2 34 3 3 9 41 2 28 22 0.15 - 7 0 0 2 52 54 8 9 7.8 7 267 24 3 7 53 2 37 54 3 13 32 2 32 14 0.15 - 6 0 0 2 56 33 8 9 6.7 6 268 24 3 11 32 2 41 34 3 17 12 2 35 54 0.15 - 5 0 0 3 0 1 8 9 5.8 5 268 25 3 14 59 2 45 2 3 20 39 2 39 22 0.16 - 4 0 0 3 3 16 8 9 5.0 4 268 26 3 18 15 2 48 17 3 23 54 2 42 37 0.16 - 3 0 0 3 6 20 8 9 4.4 3 268 27 3 21 18 2 51 21 3 26 57 2 45 41 0.17 - 2 0 0 3 9 10 8 9 4.0 2 268 28 3 24 9 2 54 12 3 29 48 2 48 32 0.18 - 1 0 0 3 11 49 8 9 3.7 1 268 29 3 26 47 2 56 50 3 32 26 2 51 11 0.20 0 0 0 3 14 15 8 9 3.5 0 268 30 3 29 13 2 59 17 3 34 52 2 53 37 0.37 Uncertainty in time = +/- 5 secs Prediction of 2023 Oct 15.9 Data for the target star ------------------------ * name: TYC 4821-00309-1 * constellation : Monoceros * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 07 25 00.7426 DE: -02 05 33.247 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 07 25 00.7426 DE: -02 05 33.247 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 9.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2759) Idomeneus asteroid class: approx. diameter [km]: 55 approx. diameter ["]: 0.017 distance from Earth [AU]: 4.30740 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#86 date of fit: 2023 Oct 11 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): 0.020", 0.001", 88.033° remarks: * orbital elements for (2759)Idomeneus : Mean anomaly = 293.1687862141 deg Arg. of pericenter = 7.5299034519 deg Long. of node = 171.2227124069 deg Inclination = 21.9370425194 deg Eccentricity = 0.0655429456 Semimajor axis = 5.1967247579 AU Perihelion dist = 4.8561161097 AU Mag: H = 10.09, G = 0.15 Epoch of elements : MJD 60288.34548611 TDT (2023 Dec 10.3455) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#862023Oct11,4.40,2023,12,10,8.292258,0.027805,-0.138472,-6.870312,-1.378810,-0.003255,0.002583,0.000001,0.000000 -91.6327,-2.1383,53.76,-22.90,False TYC 4821-00309-1,7.41687294,-2.0925684,0.00,9.91,0.00,0.0,0,,7.43721741,-2.1382842,7.41,0.00,0,0,0 2759,Idomeneus,17.32,54.600,4.3074,0,0,-0.935,-2.82,,4.0,0 0,293.1400,2023,12,10,7.5299,171.2227,21.9370,0.06554,5.19672,4.85612,10.08,5.0,0.15 1.189,0.0197,0.0008,88,0.0197,Known errors,-1.00,0,-1,-1 20231210_0309-1,60232.89 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Oct 15, 21:15 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org