IOTA/IOTA-ES occultation update for (253) Mathilde / TYC 0691-00356-1 event on 2023 Nov 28, 01:05 UT Visible from Africa, South America Summary ------- On 2023 Nov 28 UT, the 57.9 km diameter asteroid (253) Mathilde will occult a 9.4 mag star in the constellation Orion for observers along a path across Africa, South America. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.30 mag to 13.69 mag (the magnitude of the asteroid) for at most 5.040 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: 100 * date and approx. time of event: 2023 Nov 28, 00:57 - 2023 Nov 28, 01:14 * geocentric midpoint of event [JD]: 2460276.54561833 * magnitude of target star: 9.41 * magnitude drop [mag]: 4.30 * estimated maximum duration [s]: 5.040 * Moon: 99 % sunlit, 15° distance * Sun: 168° distance * rough path description: Africa, South America The occultation path -------------------- * approximate projected width [km]: 66 * 1 sigma uncertainty interval [path widths]: +/- 0.02 * 1 sigma uncertainty interval [seconds]: +/- 0.7 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.007, +/- 0.001) * 1 sigma uncertainty ellipse (major, minor, PA): (0.007", 0.001", 83°) * approx speed of asteroid's shadow [km/s]: 11.4821 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 0691-00356-1 by 253 Mathilde on 2023 Nov 28 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 - 93 0 0 -38 16 21 1 13 51.5 1 74 -1 -37 57 54 -38 34 51 -37 57 16 -38 35 29 .... - 92 0 0 -38 3 15 1 13 51.3 1 74 -1 -37 44 47 -38 21 46 -37 44 9 -38 22 24 0.32 - 91 0 0 -37 49 57 1 13 51.0 2 73 -2 -37 31 28 -38 8 29 -37 30 50 -38 9 7 0.40 - 90 0 0 -37 36 27 1 13 50.6 3 72 -3 -37 17 57 -37 55 0 -37 17 20 -37 55 38 0.43 - 89 0 0 -37 22 47 1 13 50.1 4 72 -4 -37 4 16 -37 41 21 -37 3 38 -37 41 59 0.46 - 88 0 0 -37 8 55 1 13 49.4 5 71 -5 -36 50 23 -37 27 30 -36 49 46 -37 28 8 0.47 - 87 0 0 -36 54 53 1 13 48.6 6 71 -5 -36 36 20 -37 13 29 -36 35 42 -37 14 7 0.48 - 86 0 0 -36 40 40 1 13 47.6 6 70 -6 -36 22 6 -36 59 17 -36 21 28 -36 59 55 0.49 - 85 0 0 -36 26 17 1 13 46.5 7 69 -7 -36 7 42 -36 44 54 -36 7 4 -36 45 33 0.49 - 84 0 0 -36 11 43 1 13 45.3 8 69 -8 -35 53 8 -36 30 22 -35 52 30 -36 31 0 0.50 - 83 0 0 -35 57 0 1 13 44.0 9 68 -9 -35 38 23 -36 15 39 -35 37 45 -36 16 17 0.50 - 82 0 0 -35 42 6 1 13 42.5 10 68 -9 -35 23 29 -36 0 47 -35 22 51 -36 1 25 0.51 - 81 0 0 -35 27 4 1 13 40.8 11 67 -10 -35 8 26 -35 45 45 -35 7 48 -35 46 23 0.51 - 80 0 0 -35 11 52 1 13 39.0 11 67 -11 -34 53 13 -35 30 34 -34 52 35 -35 31 12 0.51 - 79 0 0 -34 56 31 1 13 37.1 12 66 -12 -34 37 52 -35 15 13 -34 37 14 -35 15 52 0.51 - 78 0 0 -34 41 1 1 13 35.1 13 65 -13 -34 22 22 -34 59 44 -34 21 43 -35 0 23 0.51 - 77 0 0 -34 25 23 1 13 32.9 14 65 -13 -34 6 43 -34 44 7 -34 6 5 -34 44 45 0.52 - 76 0 0 -34 9 37 1 13 30.5 15 64 -14 -33 50 56 -34 28 21 -33 50 18 -34 29 0 0.52 - 75 0 0 -33 53 43 1 13 28.0 16 64 -15 -33 35 1 -34 12 28 -33 34 23 -34 13 6 0.52 - 74 0 0 -33 37 41 1 13 25.4 17 63 -16 -33 18 59 -33 56 27 -33 18 21 -33 57 5 0.52 - 73 0 0 -33 21 32 1 13 22.6 17 62 -17 -33 2 49 -33 40 18 -33 2 11 -33 40 56 0.52 - 72 0 0 -33 5 16 1 13 19.7 18 62 -17 -32 46 33 -33 24 2 -32 45 55 -33 24 41 0.52 - 71 0 0 -32 48 53 1 13 16.6 19 61 -18 -32 30 9 -33 7 39 -32 29 31 -33 8 18 0.52 - 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289 -13 -12 14 18 -12 50 6 -12 13 42 -12 50 43 0.54 54 0 0 -12 38 10 0 58 18.8 22 289 -12 -12 20 17 -12 56 6 -12 19 40 -12 56 42 0.54 55 0 0 -12 44 27 0 58 14.8 22 288 -11 -12 26 33 -13 2 23 -12 25 57 -13 3 0 0.54 56 0 0 -12 51 2 0 58 11.0 21 288 -10 -12 33 8 -13 9 0 -12 32 31 -13 9 37 0.54 57 0 0 -12 57 56 0 58 7.4 20 288 -9 -12 40 1 -13 15 54 -12 39 24 -13 16 31 0.54 58 0 0 -13 5 8 0 58 3.9 19 288 -8 -12 47 12 -13 23 7 -12 46 36 -13 23 44 0.55 59 0 0 -13 12 38 0 58 0.6 18 287 -7 -12 54 41 -13 30 38 -12 54 5 -13 31 15 0.55 60 0 0 -13 20 26 0 57 57.5 17 287 -6 -13 2 28 -13 38 27 -13 1 52 -13 39 4 0.55 61 0 0 -13 28 32 0 57 54.5 16 287 -6 -13 10 33 -13 46 33 -13 9 57 -13 47 10 0.55 62 0 0 -13 36 55 0 57 51.7 15 286 -5 -13 18 56 -13 54 58 -13 18 19 -13 55 35 0.55 63 0 0 -13 45 37 0 57 49.0 14 286 -4 -13 27 37 -14 3 40 -13 27 0 -14 4 17 0.55 64 0 0 -13 54 36 0 57 46.5 13 286 -3 -13 36 34 -14 12 40 -13 35 58 -14 13 17 0.55 65 0 0 -14 3 52 0 57 44.3 12 286 -2 -13 45 50 -14 21 57 -13 45 13 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Prediction of 2023 Oct 15.9 Data for the target star ------------------------ * name: TYC 0691-00356-1 * constellation : Orion * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 04 45 50.2485 DE: +11 50 32.999 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 04 45 50.2485 DE: +11 50 32.999 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 9.4 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (253) Mathilde asteroid class: approx. diameter [km]: 58 approx. diameter ["]: 0.053 distance from Earth [AU]: 1.51150 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#236 date of fit: 2023 Oct 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): 0.007", 0.001", 83.321° remarks: * orbital elements for (253)Mathilde : Mean anomaly = 61.7484982784 deg Arg. of pericenter = 157.7922431218 deg Long. of node = 179.5221604933 deg Inclination = 6.7403347926 deg Eccentricity = 0.2641305785 Semimajor axis = 2.6485157780 AU Perihelion dist = 1.9489617735 AU Mag: H = 10.40, G = 0.15 Epoch of elements : MJD 60276.04548611 TDT (2023 Nov 28.0455) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#2362023Oct09,5.04,2023,11,28,1.094840,0.091791,-0.458855,-6.354816,-1.271716,-0.000769,0.000944,0.000001,0.000000 -11.3105,11.8871,160.51,-21.22,False TYC 0691-00356-1,4.76395791,11.8424998,0.00,9.41,0.00,0.0,4,,4.78638141,11.8871114,4.30,0.00,0,0,0 253,Mathilde,13.69,57.900,1.5115,0,0,-2.518,-7.40,,0.6,0 0,61.5094,2023,11,27,157.7922,179.5222,6.7403,0.26413,2.64852,1.94896,10.41,5.0,0.15 1.017,0.0073,0.0007,83,0.0074,Known errors,-1.00,0,-1,-1 20231128_0356-1,60232.88 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Oct 15, 21:10 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org