IOTA/IOTA-ES occultation update for (5666) Rabelais / TYC 6317-00174-1 event on 2024 Nov 20, 17:33 UT Visible from Summary ------- On 2024 Nov 20 UT, the 15.196 km diameter asteroid (5666) Rabelais will occult a 11.1 mag star in the constellation Sagittarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 8.10 mag to 19.15 mag (the magnitude of the asteroid) for at most 0.480 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: 98 * date and approx. time of event: 2024 Nov 20, 17:30 - 2024 Nov 20, 17:36 * geocentric midpoint of event [JD]: 2460635.23164875 * magnitude of target star: 11.05 * magnitude drop [mag]: 8.10 * estimated maximum duration [s]: 0.480 * Moon: 72 % sunlit, 172° distance * Sun: 59° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 15 * 1 sigma uncertainty interval [path widths]: +/- 0.36 * 1 sigma uncertainty interval [seconds]: +/- 0.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.008, +/- 0.003) * 1 sigma uncertainty ellipse (major, minor, PA): (0.009", 0.002", 77°) * approx speed of asteroid's shadow [km/s]: 31.6772 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6317-00174-1 by 5666 Rabelais on 2024 Nov 20 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 -119 0 0 -17 48 8 17 30 15.0 0 109 59 -17 52 33 -17 43 44 -17 55 43 -17 40 34 .... -118 0 0 -18 7 26 17 30 15.1 1 108 60 -18 11 50 -18 3 2 -18 15 0 -17 59 51 0.19 -117 0 0 -18 26 31 17 30 15.2 2 108 61 -18 30 54 -18 22 7 -18 34 5 -18 18 57 0.17 -116 0 0 -18 45 23 17 30 15.4 3 108 62 -18 49 46 -18 41 0 -18 52 57 -18 37 50 0.17 -115 0 0 -19 4 2 17 30 15.6 4 107 63 -19 8 25 -18 59 39 -19 11 36 -18 56 29 0.16 -114 0 0 -19 22 28 17 30 15.9 5 107 64 -19 26 51 -19 18 6 -19 30 1 -19 14 56 0.16 -113 0 0 -19 40 41 17 30 16.2 6 107 65 -19 45 3 -19 36 18 -19 48 13 -19 33 9 0.16 -112 0 0 -19 58 39 17 30 16.6 7 106 66 -20 3 1 -19 54 17 -20 6 11 -19 51 7 0.16 -111 0 0 -20 16 23 17 30 17.1 8 106 67 -20 20 45 -20 12 1 -20 23 55 -20 8 52 0.16 -110 0 0 -20 33 53 17 30 17.6 9 106 68 -20 38 15 -20 29 31 -20 41 24 -20 26 22 0.16 -109 0 0 -20 51 8 17 30 18.2 10 105 68 -20 55 29 -20 46 46 -20 58 38 -20 43 38 0.16 -108 0 0 -21 8 8 17 30 18.9 11 105 69 -21 12 29 -21 3 47 -21 15 38 -21 0 38 0.16 -107 0 0 -21 24 52 17 30 19.6 12 105 70 -21 29 13 -21 20 31 -21 32 21 -21 17 23 0.16 -106 0 0 -21 41 21 17 30 20.3 13 104 71 -21 45 42 -21 37 1 -21 48 50 -21 33 52 0.16 -105 0 0 -21 57 34 17 30 21.1 14 104 72 -22 1 54 -21 53 14 -22 5 3 -21 50 6 0.16 -104 0 0 -22 13 31 17 30 22.0 15 103 73 -22 17 51 -22 9 12 -22 20 59 -22 6 4 0.16 -103 0 0 -22 29 12 17 30 22.9 16 103 74 -22 33 32 -22 24 53 -22 36 40 -22 21 45 0.16 -102 0 0 -22 44 37 17 30 23.9 17 103 75 -22 48 56 -22 40 18 -22 52 4 -22 37 10 0.16 -101 0 0 -22 59 45 17 30 24.9 18 102 76 -23 4 4 -22 55 26 -23 7 11 -22 52 19 0.16 -100 0 0 -23 14 36 17 30 26.0 19 102 77 -23 18 54 -23 10 17 -23 22 1 -23 7 10 0.16 - 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1 1 43 - 0 52 54 - 1 4 55 - 0 49 43 0.19 59 0 0 - 0 36 46 17 36 52.0 6 252 -52 - 0 41 10 - 0 32 21 - 0 44 21 - 0 29 10 0.19 60 0 0 - 0 16 24 17 36 52.4 5 252 -53 - 0 20 48 - 0 11 59 - 0 23 59 - 0 8 49 0.20 61 0 0 0 3 47 17 36 52.7 4 252 -54 - 0 0 37 0 8 11 - 0 3 47 0 11 22 0.21 62 0 0 0 23 47 17 36 52.9 3 252 -55 0 19 23 0 28 10 0 16 12 0 31 21 0.23 63 0 0 0 43 34 17 36 53.0 2 252 -56 0 39 10 0 47 57 0 36 0 0 51 7 0.27 64 0 0 1 3 8 17 36 53.1 1 252 -57 0 58 45 1 7 31 0 55 35 1 10 41 0.47 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 6317-00174-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 56 18.9241 DE: -17 49 21.344 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 56 18.9236 DE: -17 49 21.346 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 11.1 * B mag [mag]: 11.5 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (5666) Rabelais asteroid class: approx. diameter [km]: 15 approx. diameter ["]: 0.007 distance from Earth [AU]: 3.16810 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#44 date of fit: 2023 Apr 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", 0.002", 77.236° remarks: * orbital elements for (5666)Rabelais : Mean anomaly = 180.1770730785 deg Arg. of pericenter = 253.6758036097 deg Long. of node = 241.5066132085 deg Inclination = 3.3946064417 deg Eccentricity = 0.1246297951 Semimajor axis = 2.4829581535 AU Perihelion dist = 2.1735075876 AU Mag: H = 13.49, G = 0.15 Epoch of elements : MJD 60634.73164854 TDT (2024 Nov 20.7316) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#442023Apr25,0.48,2024,11,20,17.559570,0.027781,-0.147320,17.612243,3.079647,0.004935,0.001135,-0.000001,0.000000 -24.1834,-17.7575,-86.95,-19.91,False TYC 6317-00174-1,19.93859007,-17.8225955,11.52,11.05,10.80,0.0,0,,19.96221026,-17.7574613,8.10,7.90,0,0,0 5666,Rabelais,19.15,15.196,3.1681,0,0,3.423,8.55,,1.0,0 0,179.9928,2024,11,20,253.6758,241.5066,3.3946,0.12463,2.48296,2.17351,13.49,5.0,0.15 1.361,0.0087,0.0024,77,0.0024,Known errors,0.94,0,-1,-1 20241120_0174-1,60140.71 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:58 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org