IOTA/IOTA-ES occultation update for (9298) Geake / TYC 236-00191-1 event on 2024 Oct 24, 18:39 UT Visible from Summary ------- On 2024 Oct 24 UT, the 12.5776811218484 km diameter asteroid (9298) Geake will occult a 10.0 mag star in the constellation Sextans for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 9.58 mag to 19.56 mag (the magnitude of the asteroid) for at most 0.500 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: 87 * date and approx. time of event: 2024 Oct 24, 18:35 - 2024 Oct 24, 18:43 * geocentric midpoint of event [JD]: 2460608.27719987 * magnitude of target star: 9.98 * magnitude drop [mag]: 9.58 * estimated maximum duration [s]: 0.500 * Moon: 45 % sunlit, 26° distance * Sun: 64° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 14 * 1 sigma uncertainty interval [path widths]: +/- 0.57 * 1 sigma uncertainty interval [seconds]: +/- 0.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.006, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.006", 0.003", 105°) * approx speed of asteroid's shadow [km/s]: 25.8806 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 236-00191-1 by 9298 Geake on 2024 Oct 24 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 102 0 0 50 23 43 18 35 22.2 0 87 -47 50 19 59 50 27 27 50 15 39 50 31 47 .... 103 0 0 50 25 24 18 35 22.3 1 88 -46 50 21 40 50 29 8 50 17 20 50 33 27 -0.28 104 0 0 50 26 43 18 35 22.3 2 89 -46 50 22 59 50 30 27 50 18 40 50 34 47 -0.33 105 0 0 50 27 43 18 35 22.4 2 90 -45 50 23 59 50 31 27 50 19 40 50 35 46 -0.35 106 0 0 50 28 21 18 35 22.6 3 90 -45 50 24 37 50 32 5 50 20 18 50 36 25 -0.36 107 0 0 50 28 39 18 35 22.7 4 91 -45 50 24 55 50 32 23 50 20 36 50 36 42 -0.36 108 0 0 50 28 36 18 35 22.9 4 92 -44 50 24 52 50 32 20 50 20 33 50 36 39 -0.37 109 0 0 50 28 12 18 35 23.2 5 93 -44 50 24 29 50 31 56 50 20 9 50 36 16 -0.37 110 0 0 50 27 28 18 35 23.4 5 94 -43 50 23 44 50 31 12 50 19 25 50 35 31 -0.37 111 0 0 50 26 23 18 35 23.7 6 94 -43 50 22 39 50 30 7 50 18 20 50 34 26 -0.38 112 0 0 50 24 57 18 35 24.0 7 95 -42 50 21 13 50 28 41 50 16 54 50 33 1 -0.38 113 0 0 50 23 10 18 35 24.4 7 96 -42 50 19 26 50 26 55 50 15 7 50 31 14 -0.38 114 0 0 50 21 3 18 35 24.8 8 97 -41 50 17 19 50 24 47 50 12 59 50 29 7 -0.38 115 0 0 50 18 34 18 35 25.2 9 97 -41 50 14 50 50 22 19 50 10 30 50 26 39 -0.38 116 0 0 50 15 45 18 35 25.7 9 98 -40 50 12 1 50 19 30 50 7 41 50 23 50 -0.38 117 0 0 50 12 35 18 35 26.2 10 99 -40 50 8 50 50 16 19 50 4 30 50 20 40 -0.38 118 0 0 50 9 3 18 35 26.7 11 100 -39 50 5 18 50 12 48 50 0 58 50 17 9 -0.38 119 0 0 50 5 11 18 35 27.3 11 100 -39 50 1 26 50 8 56 49 57 5 50 13 16 -0.38 120 0 0 50 0 57 18 35 27.9 12 101 -38 49 57 12 50 4 42 49 52 51 50 9 3 -0.38 121 0 0 49 56 22 18 35 28.5 13 102 -38 49 52 36 50 0 7 49 48 15 50 4 28 -0.38 122 0 0 49 51 25 18 35 29.2 13 103 -37 49 47 39 49 55 11 49 43 18 49 59 32 -0.38 123 0 0 49 46 7 18 35 29.9 14 104 -37 49 42 21 49 49 53 49 38 0 49 54 15 -0.38 124 0 0 49 40 27 18 35 30.7 14 104 -36 49 36 41 49 44 14 49 32 19 49 48 36 -0.38 125 0 0 49 34 26 18 35 31.4 15 105 -36 49 30 40 49 38 13 49 26 17 49 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6 - 4 59 28 - 5 11 31 - 4 55 3 -0.42 - 94 0 0 - 5 14 6 18 42 49.8 16 273 77 - 5 17 54 - 5 10 17 - 5 22 18 - 5 5 52 -0.42 - 93 0 0 - 5 24 22 18 42 51.1 15 273 77 - 5 28 10 - 5 20 33 - 5 32 34 - 5 16 9 -0.42 - 92 0 0 - 5 34 5 18 42 52.2 14 273 76 - 5 37 52 - 5 30 17 - 5 42 16 - 5 25 53 -0.42 - 91 0 0 - 5 43 15 18 42 53.3 13 273 75 - 5 47 3 - 5 39 28 - 5 51 26 - 5 35 4 -0.42 - 90 0 0 - 5 51 53 18 42 54.3 12 273 74 - 5 55 40 - 5 48 6 - 6 0 3 - 5 43 43 -0.42 - 89 0 0 - 5 59 58 18 42 55.2 11 273 73 - 6 3 45 - 5 56 11 - 6 8 8 - 5 51 49 -0.42 - 88 0 0 - 6 7 31 18 42 56.0 10 273 72 - 6 11 17 - 6 3 44 - 6 15 40 - 5 59 22 -0.43 - 87 0 0 - 6 14 31 18 42 56.7 9 273 72 - 6 18 17 - 6 10 45 - 6 22 39 - 6 6 22 -0.43 - 86 0 0 - 6 20 58 18 42 57.4 8 273 71 - 6 24 44 - 6 17 12 - 6 29 6 - 6 12 50 -0.43 - 85 0 0 - 6 26 53 18 42 57.9 7 273 70 - 6 30 39 - 6 23 7 - 6 35 0 - 6 18 45 -0.43 - 84 0 0 - 6 32 15 18 42 58.4 6 273 69 - 6 36 1 - 6 28 30 - 6 40 22 - 6 24 8 -0.44 - 83 0 0 - 6 37 5 18 42 58.9 5 272 68 - 6 40 51 - 6 33 20 - 6 45 12 - 6 28 58 -0.45 - 82 0 0 - 6 41 22 18 42 59.2 4 272 67 - 6 45 8 - 6 37 37 - 6 49 28 - 6 33 16 -0.46 - 81 0 0 - 6 45 7 18 42 59.4 3 272 66 - 6 48 52 - 6 41 22 - 6 53 13 - 6 37 1 -0.48 - 80 0 0 - 6 48 20 18 42 59.6 2 272 65 - 6 52 5 - 6 44 34 - 6 56 25 - 6 40 14 -0.53 - 79 0 0 - 6 51 0 18 42 59.7 1 272 64 - 6 54 45 - 6 47 15 - 6 59 5 - 6 42 54 -0.74 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 236-00191-1 * constellation : Sextans * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 09 43 51.7033 DE: +02 03 19.857 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 09 43 51.7038 DE: +02 03 19.855 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.0 * B mag [mag]: 10.3 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (9298) Geake asteroid class: approx. diameter [km]: 13 approx. diameter ["]: 0.005 distance from Earth [AU]: 3.54790 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#50 date of fit: 2023 Feb 09 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): 0.006", 0.003", 105.205° remarks: * orbital elements for (9298)Geake : Mean anomaly = 143.6052218986 deg Arg. of pericenter = 120.1589829255 deg Long. of node = 211.7700908913 deg Inclination = 12.1159462039 deg Eccentricity = 0.2989739747 Semimajor axis = 2.5697387684 AU Perihelion dist = 1.8014537548 AU Mag: H = 13.38, G = 0.15 Epoch of elements : MJD 60607.77719984 TDT (2024 Oct 24.7772) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#502023Feb09,0.50,2024,10,24,18.652797,0.174032,0.325781,12.836543,-6.971966,-0.005165,0.001317,-0.000001,0.000001 -167.1637,1.9442,-103.77,-12.12,False TYC 236-00191-1,9.73102866,2.0555159,10.29,9.98,9.81,0.1,0,,9.75223502,1.9442277,9.58,9.29,0,0,0 9298,Geake,19.56,12.835,3.5479,0,0,2.123,-17.28,,1.0,0 0,143.4193,2024,10,24,120.1590,211.7701,12.1159,0.29897,2.56974,1.80145,13.38,5.0,0.15 1.579,0.0063,0.0025,105,0.0029,Known errors,0.94,0,-1,-1 20241024_0191-1,60140.66 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 15:46 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org