IOTA/IOTA-ES occultation update for (2270) Yazhi / UCAC4 503-054259 event on 2024 Nov 10, 09:10 UT Visible from Summary ------- On 2024 Nov 10 UT, the 24.483 km diameter asteroid (2270) Yazhi will occult a 11.7 mag star in the constellation Leo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 6.08 mag to 17.80 mag (the magnitude of the asteroid) for at most 0.980 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: 99 * date and approx. time of event: 2024 Nov 10, 09:06 - 2024 Nov 10, 09:14 * geocentric midpoint of event [JD]: 2460624.88225141 * magnitude of target star: 11.72 * magnitude drop [mag]: 6.08 * estimated maximum duration [s]: 0.980 * Moon: 63 % sunlit, 176° distance * Sun: 71° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 26 * 1 sigma uncertainty interval [path widths]: +/- 0.29 * 1 sigma uncertainty interval [seconds]: +/- 1.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.014, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.015", 0.003", 111°) * approx speed of asteroid's shadow [km/s]: 25.0234 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 503-054259 by 2270 Yazhi on 2024 Nov 10 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 -116 0 0 - 0 11 44 9 6 26.9 1 80 -60 - 0 18 54 - 0 4 33 - 0 23 1 - 0 0 27 .... -115 0 0 - 0 1 4 9 6 27.0 2 80 -59 - 0 8 14 0 6 6 - 0 12 20 0 10 12 0.21 -114 0 0 0 9 13 9 6 27.2 3 80 -59 0 2 3 0 16 22 - 0 2 3 0 20 27 0.27 -113 0 0 0 19 5 9 6 27.5 4 80 -58 0 11 56 0 26 14 0 7 50 0 30 19 0.29 -112 0 0 0 28 33 9 6 27.8 5 80 -57 0 21 24 0 35 41 0 17 19 0 39 46 0.31 -111 0 0 0 37 37 9 6 28.3 6 80 -56 0 30 29 0 44 45 0 26 23 0 48 50 0.32 -110 0 0 0 46 17 9 6 28.8 7 80 -56 0 39 9 0 53 24 0 35 4 0 57 29 0.33 -109 0 0 0 54 32 9 6 29.4 8 80 -55 0 47 24 1 1 39 0 43 19 1 5 43 0.33 -108 0 0 1 2 22 9 6 30.1 9 80 -54 0 55 15 1 9 29 0 51 11 1 13 33 0.33 -107 0 0 1 9 48 9 6 30.9 10 80 -53 1 2 41 1 16 55 0 58 37 1 20 59 0.34 -106 0 0 1 16 49 9 6 31.7 11 80 -52 1 9 43 1 23 55 1 5 38 1 27 59 0.34 -105 0 0 1 23 25 9 6 32.7 12 80 -52 1 16 19 1 30 31 1 12 15 1 34 35 0.34 -104 0 0 1 29 37 9 6 33.7 13 80 -51 1 22 31 1 36 42 1 18 27 1 40 46 0.34 -103 0 0 1 35 23 9 6 34.8 14 80 -50 1 28 17 1 42 28 1 24 13 1 46 31 0.35 -102 0 0 1 40 44 9 6 36.0 15 80 -49 1 33 38 1 47 49 1 29 35 1 51 52 0.35 -101 0 0 1 45 39 9 6 37.2 16 80 -48 1 38 34 1 52 44 1 34 31 1 56 47 0.35 -100 0 0 1 50 10 9 6 38.6 17 80 -47 1 43 5 1 57 15 1 39 2 2 1 18 0.35 - 99 0 0 1 54 15 9 6 40.0 18 80 -46 1 47 10 2 1 20 1 43 7 2 5 22 0.35 - 98 0 0 1 57 55 9 6 41.5 19 80 -45 1 50 50 2 4 59 1 46 47 2 9 2 0.35 - 97 0 0 2 1 9 9 6 43.1 20 80 -44 1 54 4 2 8 13 1 50 1 2 12 16 0.35 - 96 0 0 2 3 58 9 6 44.7 21 80 -44 1 56 53 2 11 2 1 52 50 2 15 4 0.35 - 95 0 0 2 6 21 9 6 46.5 22 80 -43 1 59 16 2 13 25 1 55 14 2 17 27 0.35 - 94 0 0 2 8 18 9 6 48.3 23 80 -42 2 1 14 2 15 22 1 57 11 2 19 25 0.35 - 93 0 0 2 9 50 9 6 50.2 24 80 -41 2 2 46 2 16 54 1 58 43 2 20 56 0.36 - 92 0 0 2 10 56 9 6 52.1 25 79 -40 2 3 52 2 18 0 1 59 49 2 22 2 0.36 - 91 0 0 2 11 36 9 6 54.2 26 79 -39 2 4 32 2 18 40 2 0 30 2 22 43 0.36 - 90 0 0 2 11 51 9 6 56.3 27 79 -38 2 4 47 2 18 55 2 0 44 2 22 57 0.36 - 89 0 0 2 11 40 9 6 58.5 28 79 -37 2 4 36 2 18 44 2 0 33 2 22 46 0.36 - 88 0 0 2 11 3 9 7 0.7 29 79 -36 2 3 58 2 18 7 1 59 56 2 22 9 0.36 - 87 0 0 2 10 0 9 7 3.1 30 79 -35 2 2 55 2 17 4 1 58 53 2 21 6 0.36 - 86 0 0 2 8 31 9 7 5.5 31 79 -34 2 1 27 2 15 35 1 57 24 2 19 37 0.36 - 85 0 0 2 6 36 9 7 8.0 32 79 -33 1 59 32 2 13 40 1 55 29 2 17 43 0.36 - 84 0 0 2 4 16 9 7 10.5 33 79 -32 1 57 11 2 11 20 1 53 8 2 15 23 0.36 - 83 0 0 2 1 29 9 7 13.1 34 79 -31 1 54 25 2 8 34 1 50 21 2 12 36 0.36 - 82 0 0 1 58 17 9 7 15.8 35 79 -30 1 51 12 2 5 22 1 47 9 2 9 25 0.36 - 81 0 0 1 54 39 9 7 18.6 36 78 -29 1 47 34 2 1 44 1 43 30 2 5 47 0.36 - 80 0 0 1 50 35 9 7 21.4 37 78 -28 1 43 30 1 57 40 1 39 26 2 1 43 0.36 - 79 0 0 1 46 5 9 7 24.3 38 78 -27 1 39 0 1 53 10 1 34 56 1 57 14 0.36 - 78 0 0 1 41 10 9 7 27.3 39 78 -26 1 34 4 1 48 15 1 30 0 1 52 18 0.36 - 77 0 0 1 35 48 9 7 30.3 40 78 -25 1 28 42 1 42 54 1 24 38 1 46 57 0.36 - 76 0 0 1 30 1 9 7 33.4 41 78 -24 1 22 55 1 37 7 1 18 50 1 41 11 0.36 - 75 0 0 1 23 48 9 7 36.6 42 77 -23 1 16 41 1 30 54 1 12 37 1 34 58 0.36 - 74 0 0 1 17 9 9 7 39.8 42 77 -22 1 10 2 1 24 16 1 5 58 1 28 20 0.36 - 73 0 0 1 10 5 9 7 43.1 43 77 -21 1 2 58 1 17 12 0 58 53 1 21 16 0.36 - 72 0 0 1 2 35 9 7 46.4 44 76 -20 0 55 28 1 9 43 0 51 23 1 13 47 0.36 - 71 0 0 0 54 40 9 7 49.8 45 76 -19 0 47 32 1 1 48 0 43 27 1 5 53 0.36 - 70 0 0 0 46 19 9 7 53.3 46 76 -18 0 39 11 0 53 27 0 35 5 0 57 32 0.36 - 69 0 0 0 37 33 9 7 56.9 47 75 -17 0 30 24 0 44 42 0 26 18 0 48 47 0.36 - 68 0 0 0 28 21 9 8 0.5 48 75 -16 0 21 12 0 35 31 0 17 6 0 39 36 0.36 - 67 0 0 0 18 45 9 8 4.1 49 74 -15 0 11 35 0 25 54 0 7 29 0 30 0 0.36 - 66 0 0 0 8 43 9 8 7.8 50 74 -14 0 1 32 0 15 53 - 0 2 34 0 19 59 0.36 - 65 0 0 - 0 1 44 9 8 11.6 51 73 -13 - 0 8 55 0 5 27 - 0 13 2 0 9 33 0.36 - 64 0 0 - 0 12 36 9 8 15.4 52 73 -12 - 0 19 47 - 0 5 24 - 0 23 54 - 0 1 18 0.36 - 63 0 0 - 0 23 52 9 8 19.3 53 72 -11 - 0 31 4 - 0 16 40 - 0 35 11 - 0 12 34 0.36 - 62 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44 34 0.36 0 0 0 -22 21 33 9 12 56.5 47 317 54 -22 29 16 -22 13 50 -22 33 41 -22 9 25 0.36 1 0 0 -22 46 19 9 13 0.0 46 316 55 -22 54 2 -22 38 36 -22 58 27 -22 34 11 0.36 2 0 0 -23 10 58 9 13 3.5 45 315 56 -23 18 41 -23 3 15 -23 23 6 -22 58 51 0.36 3 0 0 -23 35 31 9 13 6.9 44 314 57 -23 43 13 -23 27 48 -23 47 38 -23 23 24 0.36 4 0 0 -23 59 56 9 13 10.2 43 314 58 -24 7 38 -23 52 13 -24 12 3 -23 47 49 0.36 5 0 0 -24 24 13 9 13 13.4 42 313 59 -24 31 55 -24 16 31 -24 36 20 -24 12 7 0.36 6 0 0 -24 48 21 9 13 16.6 41 312 60 -24 56 4 -24 40 40 -25 0 28 -24 36 16 0.36 7 0 0 -25 12 21 9 13 19.7 40 311 60 -25 20 3 -25 4 39 -25 24 27 -25 0 15 0.36 8 0 0 -25 36 11 9 13 22.7 39 311 61 -25 43 52 -25 28 29 -25 48 16 -25 24 6 0.36 9 0 0 -25 59 50 9 13 25.7 39 310 62 -26 7 31 -25 52 9 -26 11 55 -25 47 46 0.36 10 0 0 -26 23 19 9 13 28.5 38 309 63 -26 31 0 -26 15 38 -26 35 24 -26 11 15 0.36 11 0 0 -26 46 37 9 13 31.4 37 309 64 -26 54 17 -26 38 56 -26 58 41 -26 34 33 0.36 12 0 0 -27 9 43 9 13 34.1 36 308 64 -27 17 23 -27 2 3 -27 21 46 -26 57 40 0.36 13 0 0 -27 32 36 9 13 36.8 35 307 65 -27 40 16 -27 24 57 -27 44 39 -27 20 34 0.36 14 0 0 -27 55 18 9 13 39.3 34 307 66 -28 2 57 -27 47 39 -28 7 20 -27 43 16 0.36 15 0 0 -28 17 46 9 13 41.9 33 306 67 -28 25 25 -28 10 7 -28 29 47 -28 5 45 0.36 16 0 0 -28 40 1 9 13 44.3 32 306 67 -28 47 39 -28 32 23 -28 52 1 -28 28 1 0.36 17 0 0 -29 2 2 9 13 46.7 31 305 68 -29 9 40 -28 54 24 -29 14 2 -28 50 3 0.36 18 0 0 -29 23 48 9 13 48.9 30 304 68 -29 31 26 -29 16 11 -29 35 48 -29 11 50 0.36 19 0 0 -29 45 20 9 13 51.2 29 304 69 -29 52 57 -29 37 44 -29 57 19 -29 33 23 0.36 20 0 0 -30 6 38 9 13 53.3 28 303 70 -30 14 14 -29 59 2 -30 18 35 -29 54 41 0.36 21 0 0 -30 27 40 9 13 55.4 27 303 70 -30 35 15 -30 20 4 -30 39 36 -30 15 44 0.36 22 0 0 -30 48 26 9 13 57.4 26 302 70 -30 56 1 -30 40 51 -31 0 22 -30 36 31 0.36 23 0 0 -31 8 57 9 13 59.3 25 301 71 -31 16 31 -31 1 22 -31 20 51 -30 57 3 0.36 24 0 0 -31 29 11 9 14 1.1 25 301 71 -31 36 45 -31 21 37 -31 41 5 -31 17 18 0.36 25 0 0 -31 49 9 9 14 2.9 24 300 72 -31 56 42 -31 41 36 -32 1 1 -31 37 17 0.36 26 0 0 -32 8 50 9 14 4.6 23 300 72 -32 16 22 -32 1 17 -32 20 42 -31 56 59 0.36 27 0 0 -32 28 14 9 14 6.2 22 299 72 -32 35 46 -32 20 42 -32 40 5 -32 16 24 0.36 28 0 0 -32 47 21 9 14 7.8 21 298 72 -32 54 52 -32 39 50 -32 59 11 -32 35 32 0.36 29 0 0 -33 6 10 9 14 9.3 20 298 72 -33 13 41 -32 58 40 -33 17 59 -32 54 23 0.36 30 0 0 -33 24 42 9 14 10.7 19 297 73 -33 32 12 -33 17 13 -33 36 30 -33 12 56 0.36 31 0 0 -33 42 57 9 14 12.1 18 297 73 -33 50 26 -33 35 28 -33 54 43 -33 31 11 0.36 32 0 0 -34 0 53 9 14 13.3 17 296 73 -34 8 21 -33 53 24 -34 12 38 -33 49 8 0.36 33 0 0 -34 18 31 9 14 14.5 16 295 73 -34 25 59 -34 11 3 -34 30 15 -34 6 47 0.36 34 0 0 -34 35 50 9 14 15.7 16 295 72 -34 43 18 -34 28 24 -34 47 34 -34 24 8 0.36 35 0 0 -34 52 52 9 14 16.8 15 294 72 -35 0 18 -34 45 26 -35 4 34 -34 41 11 0.36 36 0 0 -35 9 35 9 14 17.8 14 294 72 -35 17 0 -35 2 9 -35 21 16 -34 57 54 0.36 37 0 0 -35 25 59 9 14 18.7 13 293 72 -35 33 24 -35 18 34 -35 37 39 -35 14 20 0.36 38 0 0 -35 42 4 9 14 19.6 12 292 72 -35 49 28 -35 34 40 -35 53 43 -35 30 26 0.36 39 0 0 -35 57 51 9 14 20.4 11 292 71 -36 5 14 -35 50 27 -36 9 28 -35 46 14 0.36 40 0 0 -36 13 18 9 14 21.2 10 291 71 -36 20 41 -36 5 55 -36 24 55 -36 1 42 0.36 41 0 0 -36 28 26 9 14 21.9 10 291 71 -36 35 49 -36 21 4 -36 40 2 -36 16 52 0.36 42 0 0 -36 43 16 9 14 22.5 9 290 70 -36 50 37 -36 35 55 -36 54 50 -36 31 42 0.36 43 0 0 -36 57 46 9 14 23.1 8 289 70 -37 5 7 -36 50 25 -37 9 19 -36 46 14 0.37 44 0 0 -37 11 57 9 14 23.6 7 289 69 -37 19 17 -37 4 37 -37 23 29 -37 0 26 0.37 45 0 0 -37 25 49 9 14 24.1 6 288 69 -37 33 8 -37 18 30 -37 37 20 -37 14 18 0.37 46 0 0 -37 39 21 9 14 24.5 5 288 68 -37 46 40 -37 32 3 -37 50 51 -37 27 52 0.37 47 0 0 -37 52 34 9 14 24.8 5 287 68 -37 59 53 -37 45 17 -38 4 3 -37 41 6 0.37 48 0 0 -38 5 28 9 14 25.1 4 286 67 -38 12 46 -37 58 11 -38 16 56 -37 54 1 0.37 49 0 0 -38 18 3 9 14 25.3 3 286 67 -38 25 20 -38 10 46 -38 29 30 -38 6 37 0.38 50 0 0 -38 30 18 9 14 25.5 2 285 66 -38 37 34 -38 23 2 -38 41 44 -38 18 53 0.38 51 0 0 -38 42 14 9 14 25.6 1 285 66 -38 49 29 -38 34 58 -38 53 39 -38 30 49 0.40 52 0 0 -38 53 50 9 14 25.7 1 284 65 -39 1 5 -38 46 35 -39 5 14 -38 42 27 0.46 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 15.7 Data for the target star ------------------------ * name: UCAC4 503-054259 * constellation : Leo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 10 38 15.4705 DE: +10 34 15.047 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 10 38 15.4705 DE: +10 34 15.047 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.7 * B mag [mag]: 12.2 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2270) Yazhi asteroid class: approx. diameter [km]: 24 approx. diameter ["]: 0.010 distance from Earth [AU]: 3.53050 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#53 date of fit: 2023 Apr 27 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): 0.015", 0.003", 110.682° remarks: * orbital elements for (2270)Yazhi : Mean anomaly = 251.4541601753 deg Arg. of pericenter = 188.1951332472 deg Long. of node = 75.8202839720 deg Inclination = 2.1210663147 deg Eccentricity = 0.1432319591 Semimajor axis = 3.1444593003 AU Perihelion dist = 2.6940722344 AU Mag: H = 11.56, G = 0.15 Epoch of elements : MJD 60624.38225146 TDT (2024 Nov 10.3823) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#532023Apr27,0.98,2024,11,10,9.174034,-0.114528,-0.321608,13.302419,-4.746684,-0.005227,0.002173,0.000000,0.000000 -27.7427,10.4427,38.38,-17.32,False UCAC4 503-054259,10.63763066,10.5708466,12.22,11.72,11.45,0.0,0,,10.65932525,10.4426683,6.08,5.90,0,0,0 2270,Yazhi,17.80,24.483,3.5305,0,0,2.247,-11.83,,2.2,0 0,251.3866,2024,11,10,188.1951,75.8203,2.1211,0.14323,3.14446,2.69407,11.56,5.0,0.15 1.286,0.0147,0.0027,111,0.0027,Known errors,0.89,0,-1,-1 20241110_054259,60140.69 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 16:35 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org