IOTA/IOTA-ES occultation update for (266) Aline / TYC 5211-00404-1 event on 2024 Dec 17, 01:46 UT Visible from Summary ------- On 2024 Dec 17 UT, the 109.041425185099 km diameter asteroid (266) Aline will occult a 9.9 mag star in the constellation Aquarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.07 mag to 13.91 mag (the magnitude of the asteroid) for at most 3.450 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: 2024 Dec 17, 01:43 - 2024 Dec 17, 01:50 * geocentric midpoint of event [JD]: 2460661.57414025 * magnitude of target star: 9.87 * magnitude drop [mag]: 4.07 * estimated maximum duration [s]: 3.450 * Moon: 96 % sunlit, 134° distance * Sun: 66° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 109 * 1 sigma uncertainty interval [path widths]: +/- 0.06 * 1 sigma uncertainty interval [seconds]: +/- 0.6 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.010, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.011", 0.002", 65°) * approx speed of asteroid's shadow [km/s]: 31.6394 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5211-00404-1 by 266 Aline on 2024 Dec 17 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 127 0 0 -11 51 14 1 43 24.4 0 91 63 -12 20 54 -11 21 35 -12 24 43 -11 17 46 .... 128 0 0 -11 52 6 1 43 24.4 1 91 63 -12 21 45 -11 22 27 -12 25 35 -11 18 37 0.03 129 0 0 -11 52 47 1 43 24.5 2 90 64 -12 22 27 -11 23 9 -12 26 16 -11 19 19 0.03 130 0 0 -11 53 18 1 43 24.7 3 90 65 -12 22 58 -11 23 40 -12 26 47 -11 19 50 0.03 131 0 0 -11 53 39 1 43 24.9 4 90 66 -12 23 18 -11 24 0 -12 27 8 -11 20 11 0.04 132 0 0 -11 53 50 1 43 25.2 5 90 67 -12 23 29 -11 24 11 -12 27 19 -11 20 21 0.04 133 0 0 -11 53 50 1 43 25.5 6 90 68 -12 23 29 -11 24 11 -12 27 19 -11 20 21 0.04 134 0 0 -11 53 39 1 43 25.9 7 89 68 -12 23 19 -11 24 1 -12 27 8 -11 20 11 0.04 135 0 0 -11 53 19 1 43 26.4 8 89 69 -12 22 58 -11 23 40 -12 26 48 -11 19 51 0.04 136 0 0 -11 52 48 1 43 26.9 9 89 70 -12 22 27 -11 23 9 -12 26 17 -11 19 20 0.04 137 0 0 -11 52 7 1 43 27.5 10 89 71 -12 21 46 -11 22 28 -12 25 36 -11 18 38 0.04 138 0 0 -11 51 15 1 43 28.1 11 89 71 -12 20 55 -11 21 36 -12 24 44 -11 17 47 0.04 139 0 0 -11 50 13 1 43 28.8 12 88 72 -12 19 53 -11 20 34 -12 23 43 -11 16 45 0.04 140 0 0 -11 49 1 1 43 29.5 13 88 73 -12 18 41 -11 19 22 -12 22 30 -11 15 32 0.04 141 0 0 -11 47 38 1 43 30.4 14 88 74 -12 17 18 -11 17 59 -12 21 8 -11 14 10 0.04 142 0 0 -11 46 6 1 43 31.2 15 88 74 -12 15 45 -11 16 26 -12 19 35 -11 12 37 0.04 143 0 0 -11 44 22 1 43 32.1 16 88 75 -12 14 2 -11 14 43 -12 17 52 -11 10 53 0.04 144 0 0 -11 42 29 1 43 33.1 17 87 75 -12 12 9 -11 12 49 -12 15 59 -11 9 0 0.04 145 0 0 -11 40 25 1 43 34.2 18 87 76 -12 10 6 -11 10 45 -12 13 56 -11 6 56 0.04 146 0 0 -11 38 11 1 43 35.3 19 87 76 -12 7 52 -11 8 31 -12 11 42 -11 4 42 0.04 147 0 0 -11 35 47 1 43 36.4 20 87 77 -12 5 28 -11 6 7 -12 9 18 -11 2 17 0.04 148 0 0 -11 33 13 1 43 37.6 21 87 77 -12 2 54 -11 3 33 -12 6 44 -10 59 43 0.04 149 0 0 -11 30 29 1 43 38.9 22 86 77 -12 0 10 -11 0 48 -12 4 0 -10 56 58 0.04 150 0 0 -11 27 34 1 43 40.2 23 86 78 -11 57 16 -10 57 53 -12 1 6 -10 54 3 0.04 151 0 0 -11 24 30 1 43 41.6 24 86 78 -11 54 11 -10 54 48 -11 58 1 -10 50 58 0.04 152 0 0 -11 21 15 1 43 43.0 25 86 78 -11 50 57 -10 51 33 -11 54 47 -10 47 43 0.04 153 0 0 -11 17 50 1 43 44.5 26 86 78 -11 47 33 -10 48 9 -11 51 23 -10 44 19 0.04 154 0 0 -11 14 16 1 43 46.1 27 85 78 -11 43 58 -10 44 34 -11 47 49 -10 40 44 0.04 155 0 0 -11 10 31 1 43 47.7 28 85 78 -11 40 14 -10 40 49 -11 44 5 -10 36 59 0.04 156 0 0 -11 6 37 1 43 49.3 29 85 77 -11 36 20 -10 36 55 -11 40 11 -10 33 4 0.04 157 0 0 -11 2 33 1 43 51.0 30 85 77 -11 32 17 -10 32 50 -11 36 7 -10 29 0 0.04 158 0 0 -10 58 20 1 43 52.8 31 85 77 -11 28 3 -10 28 36 -11 31 54 -10 24 46 0.04 159 0 0 -10 53 56 1 43 54.6 32 84 76 -11 23 40 -10 24 12 -11 27 31 -10 20 22 0.04 160 0 0 -10 49 23 1 43 56.5 33 84 76 -11 19 8 -10 19 39 -11 22 58 -10 15 49 0.04 161 0 0 -10 44 41 1 43 58.4 34 84 75 -11 14 26 -10 14 56 -11 18 16 -10 11 6 0.04 162 0 0 -10 39 49 1 44 0.3 35 84 75 -11 9 34 -10 10 4 -11 13 25 -10 6 13 0.04 163 0 0 -10 34 47 1 44 2.4 36 84 74 -11 4 33 -10 5 2 -11 8 24 -10 1 12 0.04 164 0 0 -10 29 37 1 44 4.4 37 83 73 -10 59 23 - 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99 0 0 3 56 52 1 49 10.0 44 265 -19 3 26 57 4 26 46 3 23 5 4 30 38 0.04 - 98 0 0 4 4 39 1 49 12.4 43 265 -20 3 34 45 4 34 33 3 30 53 4 38 24 0.04 - 97 0 0 4 12 18 1 49 14.9 42 265 -21 3 42 24 4 42 12 3 38 33 4 46 3 0.04 - 96 0 0 4 19 50 1 49 17.2 41 265 -22 3 49 57 4 49 43 3 46 5 4 53 34 0.04 - 95 0 0 4 27 14 1 49 19.6 40 265 -23 3 57 21 4 57 7 3 53 30 5 0 58 0.04 - 94 0 0 4 34 31 1 49 21.8 39 265 -24 4 4 38 5 4 23 4 0 47 5 8 14 0.04 - 93 0 0 4 41 40 1 49 24.1 38 265 -25 4 11 47 5 11 31 4 7 56 5 15 22 0.04 - 92 0 0 4 48 40 1 49 26.3 37 265 -26 4 18 49 5 18 31 4 14 57 5 22 22 0.04 - 91 0 0 4 55 33 1 49 28.4 36 265 -27 4 25 41 5 25 23 4 21 50 5 29 14 0.04 - 90 0 0 5 2 17 1 49 30.5 35 265 -28 4 32 26 5 32 7 4 28 35 5 35 58 0.04 - 89 0 0 5 8 53 1 49 32.5 34 265 -29 4 39 2 5 38 42 4 35 11 5 42 33 0.04 - 88 0 0 5 15 20 1 49 34.4 33 265 -30 4 45 30 5 45 9 4 41 39 5 49 0 0.04 - 87 0 0 5 21 39 1 49 36.4 32 266 -31 4 51 50 5 51 28 4 47 58 5 55 19 0.04 - 86 0 0 5 27 49 1 49 38.2 31 266 -32 4 58 0 5 57 37 4 54 9 6 1 28 0.04 - 85 0 0 5 33 50 1 49 40.0 30 266 -33 5 4 2 6 3 38 5 0 11 6 7 29 0.04 - 84 0 0 5 39 43 1 49 41.8 29 266 -34 5 9 55 6 9 30 5 6 4 6 13 21 0.04 - 83 0 0 5 45 26 1 49 43.5 28 266 -35 5 15 39 6 15 13 5 11 48 6 19 4 0.04 - 82 0 0 5 51 1 1 49 45.1 27 266 -36 5 21 14 6 20 47 5 17 23 6 24 38 0.04 - 81 0 0 5 56 26 1 49 46.7 26 266 -37 5 26 39 6 26 12 5 22 49 6 30 3 0.04 - 80 0 0 6 1 42 1 49 48.2 25 266 -37 5 31 56 6 31 28 5 28 5 6 35 18 0.04 - 79 0 0 6 6 49 1 49 49.7 24 266 -38 5 37 3 6 36 34 5 33 12 6 40 25 0.04 - 78 0 0 6 11 46 1 49 51.1 23 266 -39 5 42 1 6 41 31 5 38 10 6 45 22 0.04 - 77 0 0 6 16 34 1 49 52.4 22 266 -40 5 46 49 6 46 19 5 42 58 6 50 9 0.04 - 76 0 0 6 21 12 1 49 53.7 21 267 -41 5 51 27 6 50 56 5 47 37 6 54 47 0.04 - 75 0 0 6 25 41 1 49 55.0 20 267 -42 5 55 56 6 55 25 5 52 6 6 59 15 0.04 - 74 0 0 6 30 0 1 49 56.2 19 267 -43 6 0 16 6 59 43 5 56 25 7 3 34 0.04 - 73 0 0 6 34 9 1 49 57.3 18 267 -44 6 4 25 7 3 52 6 0 35 7 7 42 0.04 - 72 0 0 6 38 8 1 49 58.3 17 267 -45 6 8 25 7 7 51 6 4 35 7 11 41 0.04 - 71 0 0 6 41 58 1 49 59.3 16 267 -46 6 12 15 7 11 40 6 8 25 7 15 31 0.04 - 70 0 0 6 45 38 1 50 0.3 15 267 -47 6 15 55 7 15 20 6 12 4 7 19 10 0.04 - 69 0 0 6 49 7 1 50 1.2 14 267 -48 6 19 25 7 18 49 6 15 34 7 22 39 0.04 - 68 0 0 6 52 27 1 50 2.0 13 267 -49 6 22 44 7 22 8 6 18 54 7 25 58 0.04 - 67 0 0 6 55 36 1 50 2.7 12 268 -50 6 25 54 7 25 18 6 22 4 7 29 7 0.04 - 66 0 0 6 58 36 1 50 3.4 11 268 -50 6 28 54 7 28 17 6 25 4 7 32 7 0.04 - 65 0 0 7 1 25 1 50 4.1 10 268 -51 6 31 43 7 31 6 6 27 53 7 34 56 0.04 - 64 0 0 7 4 4 1 50 4.7 9 268 -52 6 34 23 7 33 44 6 30 33 7 37 34 0.04 - 63 0 0 7 6 33 1 50 5.2 8 268 -53 6 36 52 7 36 13 6 33 2 7 40 3 0.04 - 62 0 0 7 8 51 1 50 5.7 7 268 -54 6 39 10 7 38 31 6 35 20 7 42 21 0.04 - 61 0 0 7 10 59 1 50 6.1 6 268 -55 6 41 19 7 40 39 6 37 29 7 44 29 0.05 - 60 0 0 7 12 57 1 50 6.4 5 268 -56 6 43 17 7 42 37 6 39 27 7 46 27 0.05 - 59 0 0 7 14 45 1 50 6.7 4 269 -57 6 45 5 7 44 25 6 41 15 7 48 14 0.05 - 58 0 0 7 16 22 1 50 6.9 3 269 -57 6 46 42 7 46 2 6 42 52 7 49 51 0.05 - 57 0 0 7 17 49 1 50 7.0 2 269 -58 6 48 9 7 47 28 6 44 19 7 51 18 0.05 - 56 0 0 7 19 5 1 50 7.1 1 269 -59 6 49 25 7 48 45 6 45 36 7 52 34 0.06 - 55 0 0 7 20 11 1 50 7.2 0 269 -60 6 50 32 7 49 51 6 46 42 7 53 40 0.28 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: TYC 5211-00404-1 * constellation : Aquarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 21 54 32.0770 DE: -01 03 40.332 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 21 54 32.0769 DE: -01 03 40.332 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 9.9 * B mag [mag]: 10.7 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (266) Aline asteroid class: approx. diameter [km]: 109 approx. diameter ["]: 0.056 distance from Earth [AU]: 2.66900 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#124 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): 0.011", 0.002", 64.824° remarks: * orbital elements for (266)Aline : Mean anomaly = 333.4107518751 deg Arg. of pericenter = 152.0967815087 deg Long. of node = 235.8116948184 deg Inclination = 13.4030724791 deg Eccentricity = 0.1543798835 Semimajor axis = 2.8043245116 AU Perihelion dist = 2.3713932201 AU Mag: H = 8.80, G = 0.15 Epoch of elements : MJD 60661.07414034 TDT (2024 Dec 17.0741) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1242023Apr24,3.45,2024,12,17,1.779366,0.006246,-0.038613,17.611556,2.957356,0.004764,0.002250,-0.000001,0.000000 -143.9263,-0.9436,152.34,-23.37,False TYC 5211-00404-1,21.90891031,-1.0612030,10.65,9.87,9.45,0.1,0,,21.93012802,-0.9435514,4.07,4.04,0,0,0 266,Aline,13.91,109.235,2.6690,0,0,3.870,9.75,,5.8,0 0,333.1853,2024,12,16,152.0968,235.8117,13.4031,0.15438,2.80432,2.37139,8.80,5.0,0.15 1.065,0.0110,0.0022,65,0.0036,Known errors,0.93,0,-1,-1 20241217_0404-1,60140.74 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 17:49 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org