IOTA/IOTA-ES occultation update for (1266) Tone / TYC 2866-01461-1 event on 2024 Dec 29, 07:57 UT Visible from Summary ------- On 2024 Dec 29 UT, the 80.644 km diameter asteroid (1266) Tone will occult a 11.1 mag star in the constellation Perseus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.03 mag to 15.05 mag (the magnitude of the asteroid) for at most 6.900 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: 96 * date and approx. time of event: 2024 Dec 29, 07:52 - 2024 Dec 29, 08:02 * geocentric midpoint of event [JD]: 2460673.83139083 * magnitude of target star: 11.05 * magnitude drop [mag]: 4.03 * estimated maximum duration [s]: 6.900 * Moon: 3 % sunlit, 157° distance * Sun: 139° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 163 * 1 sigma uncertainty interval [path widths]: +/- 0.42 * 1 sigma uncertainty interval [seconds]: +/- 3.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.026, +/- 0.007) * 1 sigma uncertainty ellipse (major, minor, PA): (0.026", 0.004", 78°) * approx speed of asteroid's shadow [km/s]: 11.6861 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2866-01461-1 by 1266 Tone on 2024 Dec 29 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 ' " Longitude Longitude Longitude Longitude .. .. .. -45 0 0 .. .. .... .. .. .. ... .. .. ... .. .. -134 2 30 ... .. .. .... -132 34 55 -44 0 0 8 1 41.2 1 337 -22 -133 41 18 -131 26 23 -134 35 0 ... .. .. .... -133 6 52 -43 0 0 8 1 40.9 2 337 -23 -134 11 15 -132 0 30 -135 3 23 -131 3 43 -1.08 -133 34 38 -42 0 0 8 1 40.2 3 338 -24 -134 37 15 -132 30 12 -135 28 1 -131 35 8 -1.37 -133 58 36 -41 0 0 8 1 39.1 4 338 -25 -134 59 38 -132 55 52 -135 49 9 -132 2 19 -1.50 -134 19 2 -40 0 0 8 1 37.7 5 338 -26 -135 18 39 -133 17 49 -136 7 4 -132 25 37 -1.57 -134 36 12 -39 0 0 8 1 36.0 6 338 -26 -135 34 33 -133 36 19 -136 21 58 -132 45 19 -1.62 -134 50 17 -38 0 0 8 1 33.9 7 338 -27 -135 47 30 -133 51 38 -136 34 2 -133 1 41 -1.65 -135 1 30 -37 0 0 8 1 31.5 8 338 -28 -135 57 43 -134 3 55 -136 43 26 -133 14 56 -1.67 -135 10 0 -36 0 0 8 1 28.8 9 339 -29 -136 5 18 -134 13 23 -136 50 18 -133 25 14 -1.69 -135 15 55 -35 0 0 8 1 25.7 10 339 -30 -136 10 24 -134 20 8 -136 54 46 -133 32 45 -1.70 -135 19 21 -34 0 0 8 1 22.4 11 339 -31 -136 13 7 -134 24 20 -136 56 55 -133 37 36 -1.71 -135 20 26 -33 0 0 8 1 18.8 12 339 -32 -136 13 34 -134 26 5 -136 56 51 -133 39 56 -1.72 -135 19 14 -32 0 0 8 1 14.8 12 338 -33 -136 11 48 -134 25 28 -136 54 38 -133 39 49 1.73 -135 15 49 -31 0 0 8 1 10.6 13 338 -34 -136 7 54 -134 22 34 -136 50 21 -133 37 21 1.74 -135 10 15 -30 0 0 8 1 6.0 14 338 -35 -136 1 56 -134 17 26 -136 44 3 -133 32 35 1.74 -135 2 35 -29 0 0 8 1 1.2 15 338 -36 -135 53 55 -134 10 7 -136 35 45 -133 25 35 1.75 -134 52 52 -28 0 0 8 0 56.0 16 338 -37 -135 43 55 -134 0 41 -136 25 32 -133 16 24 1.75 -134 41 7 -27 0 0 8 0 50.5 17 338 -38 -135 31 56 -133 49 9 -136 13 23 -133 5 3 1.75 -134 27 21 -26 0 0 8 0 44.8 18 337 -39 -135 18 1 -133 35 32 -135 59 20 -132 51 33 1.75 -134 11 34 -25 0 0 8 0 38.7 19 337 -40 -135 2 9 -133 19 50 -135 43 23 -132 35 55 1.76 -133 53 47 -24 0 0 8 0 32.3 19 337 -41 -134 44 21 -133 2 5 -135 25 33 -132 18 10 1.76 -133 33 59 -23 0 0 8 0 25.6 20 336 -42 -134 24 36 -132 42 13 -135 5 49 -131 58 15 1.76 -133 12 10 -22 0 0 8 0 18.6 21 336 -43 -134 2 52 -132 20 16 -134 44 10 -131 36 10 1.76 -132 48 16 -21 0 0 8 0 11.2 22 336 -44 -133 39 9 -131 56 10 -134 20 35 -131 11 53 1.76 -132 22 16 -20 0 0 8 0 3.5 23 335 -45 -133 13 24 -131 29 53 -133 55 1 -130 45 20 1.76 -131 54 6 -19 0 0 7 59 55.5 23 335 -46 -132 45 34 -131 1 22 -133 27 25 -130 16 29 1.76 -131 23 43 -18 0 0 7 59 47.1 24 334 -47 -132 15 35 -130 30 31 -132 57 46 -129 45 13 1.76 -130 51 2 -17 0 0 7 59 38.4 25 334 -48 -131 43 24 -129 57 17 -132 25 57 -129 11 28 1.76 -130 15 56 -16 0 0 7 59 29.3 25 333 -49 -131 8 54 -129 21 32 -131 51 55 -128 35 7 1.76 -129 38 20 -15 0 0 7 59 19.8 26 332 -51 -130 32 0 -128 43 8 -131 15 33 -127 56 0 1.76 -128 58 3 -14 0 0 7 59 9.9 27 332 -52 -129 52 34 -128 1 56 -130 36 44 -127 13 58 1.76 -128 14 57 -13 0 0 7 58 59.6 27 331 -53 -129 10 26 -127 17 46 -129 55 20 -126 28 48 1.76 -127 28 50 -12 0 0 7 58 48.9 28 330 -54 -128 25 26 -126 30 23 -129 11 11 -125 40 15 1.75 -126 39 26 -11 0 0 7 58 37.6 28 330 -55 -127 37 21 -125 39 30 -128 24 6 -124 48 1 1.75 -125 46 28 -10 0 0 7 58 25.9 29 329 -56 -126 45 55 -124 44 49 -127 33 49 -123 51 42 1.75 -124 49 34 - 9 0 0 7 58 13.7 29 328 -57 -125 50 50 -123 45 53 -126 40 5 -122 50 51 1.75 -123 48 19 - 8 0 0 7 58 0.8 29 327 -58 -124 51 42 -122 42 11 -125 42 32 -121 44 51 1.75 -122 42 6 - 7 0 0 7 57 47.3 29 326 -60 -123 48 2 -121 33 2 -124 40 44 -120 32 53 1.75 -121 30 13 - 6 0 0 7 57 33.0 30 325 -61 -122 39 13 -120 17 33 -123 34 10 -119 13 54 1.75 -120 11 40 - 5 0 0 7 57 17.9 30 324 -62 -121 24 28 -118 54 30 -122 22 7 -117 46 23 1.75 -118 45 7 - 4 0 0 7 57 1.8 30 323 -63 -120 2 40 -117 22 8 -121 3 42 -116 8 5 1.75 -117 8 35 - 3 0 0 7 56 44.4 30 322 -64 -118 32 20 -115 37 48 -119 37 39 -114 15 28 1.75 -115 19 4 - 2 0 0 7 56 25.5 29 321 -65 -116 51 16 -113 37 6 -118 2 12 -112 2 6 1.75 -113 11 23 - 1 0 0 7 56 4.4 29 319 -65 -114 55 56 -111 11 40 -116 14 43 -109 13 58 1.76 Latitude Latitude Latitude Latitude -113 0 0 - 0 55 9 7 56 2.5 29 319 -65 - 0 8 5 - 1 43 28 0 30 9 - 2 24 39 1.74 -112 0 0 - 0 30 49 7 55 53.0 28 319 -65 0 15 41 - 1 18 31 0 53 28 - 1 59 9 1.75 -111 0 0 - 0 8 35 7 55 43.7 28 318 -66 0 37 24 - 0 55 44 1 14 48 - 1 35 53 1.75 -110 0 0 0 11 36 7 55 34.6 28 318 -66 0 57 8 - 0 35 4 1 34 11 - 1 14 46 1.75 -109 0 0 0 29 49 7 55 25.7 27 317 -66 1 14 57 - 0 16 26 1 51 41 - 0 55 45 1.76 -108 0 0 0 46 5 7 55 17.0 27 317 -65 1 30 52 0 0 13 2 7 20 - 0 38 47 1.76 -107 0 0 1 0 27 7 55 8.5 26 316 -65 1 44 57 0 14 54 2 21 10 - 0 23 48 1.76 -106 0 0 1 12 58 7 55 0.2 26 316 -65 1 57 12 0 27 41 2 33 14 - 0 10 47 1.76 -105 0 0 1 23 38 7 54 52.1 25 316 -65 2 7 40 0 38 35 2 43 31 0 0 19 1.76 -104 0 0 1 32 29 7 54 44.2 25 315 -64 2 16 21 0 47 37 2 52 5 0 9 31 1.76 -103 0 0 1 39 33 7 54 36.5 24 315 -64 2 23 17 0 54 50 2 58 55 0 16 50 1.77 -102 0 0 1 44 50 7 54 29.0 23 315 -63 2 28 29 1 0 12 3 4 3 0 22 18 1.77 -101 0 0 1 48 21 7 54 21.8 23 314 -63 2 31 57 1 3 46 3 7 28 0 25 55 1.77 -100 0 0 1 50 6 7 54 14.7 22 314 -62 2 33 41 1 5 32 3 9 12 0 27 41 1.77 - 99 0 0 1 50 5 7 54 7.8 21 314 -62 2 33 41 1 5 28 3 9 14 0 27 36 1.78 - 98 0 0 1 48 17 7 54 1.1 21 314 -61 2 31 58 1 3 36 3 7 33 0 25 40 1.78 - 97 0 0 1 44 42 7 53 54.7 20 313 -60 2 28 30 0 59 54 3 4 10 0 21 52 1.78 - 96 0 0 1 39 20 7 53 48.4 19 313 -60 2 23 16 0 54 22 2 59 4 0 16 11 1.79 - 95 0 0 1 32 8 7 53 42.4 18 313 -59 2 16 16 0 46 59 2 52 13 0 8 36 1.79 - 94 0 0 1 23 7 7 53 36.6 17 313 -58 2 7 29 0 37 42 2 43 36 - 0 0 54 1.80 - 93 0 0 1 12 13 7 53 31.0 17 313 -57 1 56 52 0 26 30 2 33 12 - 0 12 22 1.80 - 92 0 0 0 59 25 7 53 25.6 16 313 -57 1 44 23 0 13 21 2 20 59 - 0 25 50 1.81 - 91 0 0 0 44 40 7 53 20.5 15 313 -56 1 30 1 - 0 1 48 2 6 55 - 0 41 20 1.81 - 90 0 0 0 27 56 7 53 15.6 14 312 -55 1 13 43 - 0 19 0 1 50 57 - 0 58 57 1.82 - 89 0 0 0 9 9 7 53 11.0 13 312 -54 0 55 26 - 0 38 18 1 33 2 - 1 18 44 1.83 - 88 0 0 - 0 11 44 7 53 6.7 12 312 -53 0 35 5 - 0 59 48 1 13 7 - 1 40 45 1.83 - 87 0 0 - 0 34 49 7 53 2.6 11 312 -52 0 12 38 - 1 23 32 0 51 9 - 2 5 6 1.84 - 86 0 0 - 1 0 9 7 52 58.8 10 312 -51 - 0 12 1 - 1 49 38 0 27 2 - 2 31 52 1.85 - 85 0 0 - 1 27 51 7 52 55.4 9 312 -50 - 0 38 57 - 2 18 10 0 0 42 - 3 1 10 1.87 - 84 0 0 - 1 58 1 7 52 52.2 8 312 -49 - 1 8 15 - 2 49 17 - 0 27 56 - 3 33 8 1.88 - 83 0 0 - 2 30 47 7 52 49.4 7 312 -48 - 1 40 3 - 3 23 7 - 0 58 59 - 4 7 56 1.90 - 82 0 0 - 3 6 17 7 52 47.0 6 312 -46 - 2 14 28 - 3 59 49 - 1 32 34 - 4 45 43 1.93 - 81 0 0 - 3 44 42 7 52 45.0 5 312 -45 - 2 51 39 - 4 39 33 - 2 8 50 - 5 26 41 1.98 - 80 0 0 - 4 26 11 7 52 43.4 3 312 -44 - 3 31 47 - 5 22 34 - 2 47 56 - 6 11 6 2.05 - 79 0 0 - 5 11 1 7 52 42.2 2 312 -43 - 4 15 4 - 6 9 7 - 3 30 2 - 6 59 15 2.21 - 78 0 0 - 5 59 27 7 52 41.6 1 312 -42 - 5 1 44 - 6 59 31 - 4 15 23 .. .. .. 2.84 - 77 0 0 .. .. .... .. .. .. .. .. .. - 5 52 4 .. .. .. - 5 4 13 .. .. .. .... Uncertainty in time = +/- 4 secs Prediction of 2023 Jul 15.8 Data for the target star ------------------------ * name: TYC 2866-01461-1 * constellation : Perseus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 03 37 41.1075 DE: +41 01 13.249 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 03 37 41.1074 DE: +41 01 13.250 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 11.1 * B mag [mag]: 11.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1266) Tone asteroid class: approx. diameter [km]: 81 approx. diameter ["]: 0.041 distance from Earth [AU]: 2.72520 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 date of fit: 2023 Feb 11 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): 0.026", 0.004", 77.58° remarks: * orbital elements for (1266)Tone : Mean anomaly = 165.5112600788 deg Arg. of pericenter = 303.6618926867 deg Long. of node = 320.3415968575 deg Inclination = 17.1705137974 deg Eccentricity = 0.0494110357 Semimajor axis = 3.3673587897 AU Perihelion dist = 3.2009741044 AU Mag: H = 9.47, G = 0.15 Epoch of elements : MJD 60673.33138971 TDT (2024 Dec 29.3314) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Feb11,6.90,2024,12,29,7.953380,0.680256,-0.539475,-4.099032,-5.167684,0.003901,-0.000848,0.000001,0.000001 -162.7252,41.1051,61.25,-23.19,False TYC 2866-01461-1,3.62808542,41.0203470,11.15,11.05,11.00,0.0,0,,3.65631464,41.1051142,4.03,3.64,0,0,0 1266,Tone,15.05,80.644,2.7252,0,0,-1.169,-16.67,,4.2,0 0,165.4584,2024,12,29,303.6619,320.3416,17.1705,0.04941,3.36736,3.20097,9.47,5.0,0.15 1.415,0.0263,0.0043,78,0.0170,Known errors,1.09,0,-1,-1 20241229_1461-1,60140.76 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 18:14 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org