IOTA/IOTA-ES occultation update for (1166) Sakuntala / TYC 4734-01142-1 event on 2024 Nov 03, 12:45 UT Visible from Summary ------- On 2024 Nov 03 UT, the 27.23 km diameter asteroid (1166) Sakuntala will occult a 11.7 mag star in the constellation Eridanus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 2.99 mag to 14.57 mag (the magnitude of the asteroid) for at most 2.370 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 Nov 03, 12:38 - 2024 Nov 03, 12:52 * geocentric midpoint of event [JD]: 2460618.03152005 * magnitude of target star: 11.65 * magnitude drop [mag]: 2.99 * estimated maximum duration [s]: 2.370 * Moon: 4 % sunlit, 153° distance * Sun: 147° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 35 * 1 sigma uncertainty interval [path widths]: +/- 0.30 * 1 sigma uncertainty interval [seconds]: +/- 2.0 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.017, +/- 0.008) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.003", 66°) * approx speed of asteroid's shadow [km/s]: 11.4981 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 4734-01142-1 by 1166 Sakuntala on 2024 Nov 3 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 -46 34 20 12 52 31.6 0 90 -8 -46 24 49 -46 43 52 -46 19 2 -46 49 41 .... 103 0 0 -46 34 39 12 52 31.5 1 90 -8 -46 25 9 -46 44 12 -46 19 21 -46 50 1 0.53 104 0 0 -46 34 52 12 52 31.3 2 89 -9 -46 25 22 -46 44 24 -46 19 34 -46 50 14 0.65 105 0 0 -46 34 58 12 52 31.0 2 88 -9 -46 25 28 -46 44 31 -46 19 40 -46 50 20 0.70 106 0 0 -46 34 58 12 52 30.6 3 87 -10 -46 25 27 -46 44 30 -46 19 39 -46 50 19 0.73 107 0 0 -46 34 50 12 52 30.1 4 87 -11 -46 25 19 -46 44 22 -46 19 32 -46 50 11 0.74 108 0 0 -46 34 35 12 52 29.5 4 86 -11 -46 25 4 -46 44 7 -46 19 17 -46 49 57 0.75 109 0 0 -46 34 14 12 52 28.8 5 85 -12 -46 24 43 -46 43 46 -46 18 55 -46 49 35 0.76 110 0 0 -46 33 45 12 52 28.0 6 85 -12 -46 24 14 -46 43 18 -46 18 27 -46 49 7 0.77 111 0 0 -46 33 10 12 52 27.0 6 84 -13 -46 23 39 -46 42 42 -46 17 52 -46 48 32 0.78 112 0 0 -46 32 28 12 52 26.0 7 83 -13 -46 22 57 -46 42 0 -46 17 10 -46 47 50 0.78 113 0 0 -46 31 39 12 52 24.9 8 82 -14 -46 22 8 -46 41 12 -46 16 21 -46 47 1 0.78 114 0 0 -46 30 44 12 52 23.7 9 82 -14 -46 21 12 -46 40 16 -46 15 25 -46 46 6 0.79 115 0 0 -46 29 41 12 52 22.4 9 81 -15 -46 20 10 -46 39 14 -46 14 22 -46 45 3 0.79 116 0 0 -46 28 32 12 52 20.9 10 80 -15 -46 19 1 -46 38 5 -46 13 13 -46 43 54 0.79 117 0 0 -46 27 16 12 52 19.4 11 79 -16 -46 17 45 -46 36 49 -46 11 57 -46 42 39 0.79 118 0 0 -46 25 54 12 52 17.8 11 79 -16 -46 16 22 -46 35 26 -46 10 34 -46 41 16 0.79 119 0 0 -46 24 24 12 52 16.1 12 78 -17 -46 14 53 -46 33 57 -46 9 5 -46 39 47 0.80 120 0 0 -46 22 48 12 52 14.3 13 77 -17 -46 13 17 -46 32 21 -46 7 29 -46 38 11 0.80 121 0 0 -46 21 6 12 52 12.3 13 76 -18 -46 11 34 -46 30 39 -46 5 46 -46 36 29 0.80 122 0 0 -46 19 17 12 52 10.3 14 76 -18 -46 9 45 -46 28 50 -46 3 57 -46 34 40 0.80 123 0 0 -46 17 21 12 52 8.2 15 75 -19 -46 7 49 -46 26 54 -46 2 1 -46 32 44 0.80 124 0 0 -46 15 19 12 52 6.0 15 74 -19 -46 5 46 -46 24 52 -45 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40 41 -32 59 46 -32 34 53 -33 5 36 0.84 - 90 0 0 -32 47 34 12 38 33.5 13 278 20 -32 38 2 -32 57 7 -32 32 14 -33 2 57 0.84 - 89 0 0 -32 45 2 12 38 31.2 12 278 20 -32 35 30 -32 54 35 -32 29 42 -33 0 25 0.84 - 88 0 0 -32 42 38 12 38 29.0 12 277 21 -32 33 6 -32 52 11 -32 27 19 -32 58 1 0.85 - 87 0 0 -32 40 22 12 38 27.0 11 276 22 -32 30 50 -32 49 55 -32 25 3 -32 55 45 0.85 - 86 0 0 -32 38 14 12 38 25.1 10 276 23 -32 28 42 -32 47 47 -32 22 54 -32 53 37 0.85 - 85 0 0 -32 36 14 12 38 23.3 9 275 24 -32 26 42 -32 45 47 -32 20 54 -32 51 37 0.86 - 84 0 0 -32 34 22 12 38 21.8 8 275 25 -32 24 50 -32 43 55 -32 19 2 -32 49 44 0.86 - 83 0 0 -32 32 38 12 38 20.3 7 274 25 -32 23 6 -32 42 11 -32 17 18 -32 48 0 0.86 - 82 0 0 -32 31 2 12 38 19.0 7 274 26 -32 21 30 -32 40 35 -32 15 42 -32 46 24 0.87 - 81 0 0 -32 29 34 12 38 17.9 6 273 27 -32 20 2 -32 39 7 -32 14 15 -32 44 57 0.88 - 80 0 0 -32 28 14 12 38 16.9 5 273 28 -32 18 43 -32 37 47 -32 12 55 -32 43 37 0.89 - 79 0 0 -32 27 3 12 38 16.1 4 272 29 -32 17 31 -32 36 36 -32 11 44 -32 42 26 0.90 - 78 0 0 -32 26 0 12 38 15.4 3 272 30 -32 16 29 -32 35 33 -32 10 41 -32 41 23 0.93 - 77 0 0 -32 25 6 12 38 14.9 2 271 30 -32 15 34 -32 34 39 -32 9 46 -32 40 28 0.96 - 76 0 0 -32 24 19 12 38 14.5 2 271 31 -32 14 48 -32 33 52 -32 9 0 -32 39 42 1.04 - 75 0 0 -32 23 42 12 38 14.3 1 270 32 -32 14 10 -32 33 15 -32 8 22 -32 39 4 1.30 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 4734-01142-1 * constellation : Eridanus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 04 32 26.4317 DE: -00 28 08.361 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 04 32 26.4318 DE: -00 28 08.362 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.7 * B mag [mag]: 11.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1166) Sakuntala asteroid class: approx. diameter [km]: 27 approx. diameter ["]: 0.021 distance from Earth [AU]: 1.80940 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#70 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): 0.019", 0.003", 65.729° remarks: * orbital elements for (1166)Sakuntala : Mean anomaly = 96.2095072808 deg Arg. of pericenter = 190.1128567902 deg Long. of node = 106.6387923800 deg Inclination = 18.9260817257 deg Eccentricity = 0.2083345367 Semimajor axis = 2.5368390550 AU Perihelion dist = 2.0083278658 AU Mag: H = 10.43, G = 0.15 Epoch of elements : MJD 60617.53151775 TDT (2024 Nov 03.5315) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#702023Apr24,2.37,2024,11,3,12.756481,0.077584,-0.627728,-6.440591,-0.797990,-0.002747,0.001585,0.000001,0.000000 -166.1850,-0.4139,-15.45,-15.31,False TYC 4734-01142-1,4.54067547,-0.4689892,11.93,11.65,11.50,0.0,0,,4.56211159,-0.4138681,2.99,2.71,0,0,0 1166,Sakuntala,14.57,27.230,1.8094,0,0,-2.087,-3.88,,1.4,0 0,96.0799,2024,11,3,190.1129,106.6388,18.9261,0.20833,2.53684,2.00833,10.42,5.0,0.15 1.305,0.0187,0.0032,66,0.0063,Known errors,1.13,0,-1,-1 20241103_1142-1,60140.68 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:16 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org