IOTA/IOTA-ES occultation update for (1166) Sakuntala / TYC 4726-00413-1 event on 2024 Nov 22, 18:06 UT Visible from Summary ------- On 2024 Nov 22 UT, the 27.232 km diameter asteroid (1166) Sakuntala will occult a 11.5 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 2.96 mag to 14.41 mag (the magnitude of the asteroid) for at most 1.900 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: 93 * date and approx. time of event: 2024 Nov 22, 18:00 - 2024 Nov 22, 18:13 * geocentric midpoint of event [JD]: 2460637.25470688 * magnitude of target star: 11.52 * magnitude drop [mag]: 2.96 * estimated maximum duration [s]: 1.900 * Moon: 53 % sunlit, 87° distance * Sun: 159° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 31 * 1 sigma uncertainty interval [path widths]: +/- 0.48 * 1 sigma uncertainty interval [seconds]: +/- 1.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.018, +/- 0.008) * 1 sigma uncertainty ellipse (major, minor, PA): (0.019", 0.003", 67°) * approx speed of asteroid's shadow [km/s]: 14.3023 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 4726-00413-1 by 1166 Sakuntala on 2024 Nov 22 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 - 1 0 0 -20 39 5 18 13 23.8 1 90 2 -20 30 48 -20 47 23 -20 22 53 -20 55 19 .... 0 0 0 -20 39 41 18 13 23.6 2 90 1 -20 31 24 -20 47 59 -20 23 29 -20 55 56 0.38 1 0 0 -20 40 25 18 13 23.3 3 89 0 -20 32 8 -20 48 43 -20 24 13 -20 56 40 0.42 2 0 0 -20 41 16 18 13 22.8 4 89 -1 -20 32 59 -20 49 34 -20 25 4 -20 57 31 0.45 3 0 0 -20 42 15 18 13 22.2 5 89 -2 -20 33 58 -20 50 33 -20 26 3 -20 58 29 0.46 4 0 0 -20 43 21 18 13 21.5 6 88 -2 -20 35 4 -20 51 39 -20 27 9 -20 59 35 0.47 5 0 0 -20 44 34 18 13 20.7 7 88 -3 -20 36 17 -20 52 52 -20 28 22 -21 0 49 0.47 6 0 0 -20 45 55 18 13 19.7 7 88 -4 -20 37 37 -20 54 12 -20 29 42 -21 2 9 0.48 7 0 0 -20 47 22 18 13 18.6 8 87 -5 -20 39 5 -20 55 40 -20 31 10 -21 3 37 0.48 8 0 0 -20 48 57 18 13 17.3 9 87 -6 -20 40 40 -20 57 15 -20 32 45 -21 5 12 0.48 9 0 0 -20 50 39 18 13 15.9 10 87 -7 -20 42 22 -20 58 57 -20 34 27 -21 6 54 0.49 10 0 0 -20 52 28 18 13 14.4 11 86 -7 -20 44 11 -21 0 46 -20 36 16 -21 8 43 0.49 11 0 0 -20 54 25 18 13 12.8 12 86 -8 -20 46 7 -21 2 42 -20 38 12 -21 10 39 0.49 12 0 0 -20 56 28 18 13 11.0 13 85 -9 -20 48 11 -21 4 46 -20 40 15 -21 12 43 0.49 13 0 0 -20 58 38 18 13 9.1 14 85 -10 -20 50 21 -21 6 56 -20 42 26 -21 14 53 0.49 14 0 0 -21 0 55 18 13 7.1 15 85 -11 -20 52 38 -21 9 13 -20 44 43 -21 17 10 0.49 15 0 0 -21 3 19 18 13 5.0 16 84 -12 -20 55 2 -21 11 37 -20 47 7 -21 19 34 0.49 16 0 0 -21 5 50 18 13 2.7 17 84 -12 -20 57 33 -21 14 8 -20 49 37 -21 22 5 0.50 17 0 0 -21 8 27 18 13 0.4 18 83 -13 -21 0 10 -21 16 45 -20 52 15 -21 24 42 0.50 18 0 0 -21 11 12 18 12 57.9 18 83 -14 -21 2 54 -21 19 30 -20 54 59 -21 27 27 0.50 19 0 0 -21 14 2 18 12 55.2 19 83 -15 -21 5 45 -21 22 20 -20 57 49 -21 30 17 0.50 20 0 0 -21 17 0 18 12 52.5 20 82 -15 -21 8 42 -21 25 18 -21 0 47 -21 33 15 0.50 21 0 0 -21 20 4 18 12 49.6 21 82 -16 -21 11 46 -21 28 22 -21 3 51 -21 36 19 0.50 22 0 0 -21 23 14 18 12 46.7 22 81 -17 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17.0 10 276 6 -33 27 52 -33 44 26 -33 19 58 -33 52 23 0.53 171 0 0 -33 36 58 18 0 15.8 9 275 7 -33 28 42 -33 45 15 -33 20 47 -33 53 12 0.53 172 0 0 -33 37 41 18 0 14.7 8 275 7 -33 29 24 -33 45 58 -33 21 29 -33 53 54 0.54 173 0 0 -33 38 17 18 0 13.8 7 274 8 -33 30 0 -33 46 34 -33 22 6 -33 54 30 0.54 174 0 0 -33 38 46 18 0 12.9 6 274 9 -33 30 30 -33 47 3 -33 22 35 -33 55 0 0.54 175 0 0 -33 39 9 18 0 12.1 6 273 10 -33 30 53 -33 47 26 -33 22 58 -33 55 23 0.55 176 0 0 -33 39 25 18 0 11.5 5 273 11 -33 31 9 -33 47 42 -33 23 14 -33 55 39 0.55 177 0 0 -33 39 35 18 0 10.9 4 272 11 -33 31 18 -33 47 52 -33 23 24 -33 55 48 0.56 178 0 0 -33 39 38 18 0 10.5 3 272 12 -33 31 21 -33 47 55 -33 23 27 -33 55 51 0.58 179 0 0 -33 39 34 18 0 10.1 2 271 13 -33 31 18 -33 47 51 -33 23 23 -33 55 48 0.60 180 0 0 -33 39 24 18 0 9.9 1 270 14 -33 31 8 -33 47 41 -33 23 13 -33 55 37 0.66 -179 0 0 -33 39 7 18 0 9.8 1 270 15 -33 30 51 -33 47 24 -33 22 56 -33 55 21 0.84 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 4726-00413-1 * constellation : Eridanus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 04 13 44.0605 DE: -00 28 02.528 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 04 13 44.0605 DE: -00 28 02.528 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.5 * B mag [mag]: 11.8 * 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]: 1.79090 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", 66.623° remarks: * orbital elements for (1166)Sakuntala : Mean anomaly = 100.8726803090 deg Arg. of pericenter = 190.1375445700 deg Long. of node = 106.6361521109 deg Inclination = 18.9268223039 deg Eccentricity = 0.2083315564 Semimajor axis = 2.5370370038 AU Perihelion dist = 2.0084921362 AU Mag: H = 10.43, G = 0.15 Epoch of elements : MJD 60636.75470567 TDT (2024 Nov 22.7547) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#702023Apr24,1.90,2024,11,22,18.112965,-0.051127,-0.450709,-8.021228,0.909334,-0.000507,0.002077,0.000001,0.000000 89.8452,-0.4025,-95.11,-20.35,False TYC 4726-00413-1,4.22890570,-0.4673688,11.81,11.52,11.36,0.0,0,,4.25045027,-0.4025406,2.97,2.69,0,0,0 1166,Sakuntala,14.41,27.232,1.7909,0,0,-2.626,4.47,,1.4,0 0,100.6886,2024,11,22,190.1375,106.6362,18.9268,0.20833,2.53704,2.00849,10.42,5.0,0.15 1.478,0.0193,0.0033,67,0.0100,Known errors,1.27,0,-1,-1 20241122_0413-1,60140.71 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org