IOTA/IOTA-ES occultation update for (342842) 2008 YB3 / UCAC4 637-082296 event on 2024 Jul 20, 23:48 UT Visible from Summary ------- On 2024 Jul 20 UT, the 67.176 km diameter asteroid (342842) 2008 YB3 will occult a 14.4 mag star in the constellation Cygnus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.22 mag to 21.58 mag (the magnitude of the asteroid) for at most 2.180 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: 4 * date and approx. time of event: 2024 Jul 20, 23:46 - 2024 Jul 20, 23:49 * geocentric midpoint of event [JD]: 2460512.49193888 * magnitude of target star: 14.36 * magnitude drop [mag]: 7.22 * estimated maximum duration [s]: 2.180 * Moon: 100 % sunlit, 64° distance * Sun: 122° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 162 * 1 sigma uncertainty interval [path widths]: +/- 14.65 * 1 sigma uncertainty interval [seconds]: +/- 16.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.033, +/- 0.098) * 1 sigma uncertainty ellipse (major, minor, PA): (0.098", 0.032", 5°) * approx speed of asteroid's shadow [km/s]: 30.8305 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 637-082296 by 342842 2008 YB3 on 2024 Jul 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 - 32 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -46 49 59 .. .. .. .... - 31 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -45 31 36 .. .. .. .... - 30 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -44 14 38 .. .. .. .... - 29 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -42 59 6 .. .. .. .... - 28 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -41 44 59 .. .. .. .... - 27 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -40 32 21 .. .. .. .... - 26 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -39 21 9 .. .. .. .... - 25 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -38 11 26 .. .. .. .... - 24 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -37 3 11 .. .. .. .... - 23 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -35 56 25 .. .. .. .... - 22 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -34 51 7 .. .. .. .... - 21 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -33 47 17 .. .. .. .... - 20 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -32 44 55 .. .. .. .... - 19 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -31 44 1 .. .. .. .... - 18 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -30 44 34 .. .. .. .... - 17 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -29 46 33 .. .. .. .... - 16 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -28 49 59 .. .. .. .... - 15 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -27 54 51 .. .. .. .... - 14 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -27 1 7 .. .. .. .... - 13 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -26 8 48 .. .. .. .... - 12 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -25 17 52 .. .. .. .... - 11 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -24 28 20 .. .. .. .... - 10 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -23 40 9 .. .. .. .... - 9 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -22 53 20 .. .. .. .... - 8 0 0 .. .. .... .. .. .. .. .. .. -51 57 17 .. .. .. -22 7 52 .. .. .. .... - 7 0 0 .. .. .... .. .. .. .. .. .. -49 2 49 .. .. .. -21 23 43 .. .. .. .... - 6 0 0 -49 26 27 23 49 47.6 3 8 -60 -46 53 33 .. .. .. -20 40 54 .. .. .. .... - 5 0 0 -47 9 30 23 49 46.1 5 7 -62 -45 5 23 -49 58 43 -19 59 22 .. .. .. 1.67 - 4 0 0 -45 17 57 23 49 44.2 7 6 -64 -43 30 29 -47 30 24 -19 19 8 .. .. .. 1.89 - 3 0 0 -43 41 21 23 49 42.1 9 5 -66 -42 5 5 -45 34 14 -18 40 11 .. .. .. 1.99 - 2 0 0 -42 15 8 23 49 39.7 10 4 -68 -40 47 3 -43 55 21 -18 2 29 .. .. .. 2.04 - 1 0 0 -40 56 48 23 49 37.2 12 4 -69 -39 35 1 -42 27 59 -17 26 2 .. .. .. 2.08 0 0 0 -39 44 47 23 49 34.5 13 3 -70 -38 28 3 -41 9 8 -16 50 50 .. .. .. 2.10 1 0 0 -38 38 4 23 49 31.8 14 2 -72 -37 25 29 -39 57 0 -16 16 51 .. .. .. 2.12 2 0 0 -37 35 55 23 49 28.9 15 1 -73 -36 26 48 -38 50 26 -15 44 5 .. .. .. 2.13 3 0 0 -36 37 47 23 49 26.0 16 0 -74 -35 31 37 -37 48 38 -15 12 30 .. .. .. 2.15 4 0 0 -35 43 14 23 49 22.9 17 360 -75 -34 39 37 -36 50 59 -14 42 7 .. .. .. 2.15 5 0 0 -34 51 57 23 49 19.9 18 359 -75 -33 50 34 -35 57 2 -14 12 55 .. .. .. 2.16 6 0 0 -34 3 41 23 49 16.7 19 358 -76 -33 4 15 -35 6 27 -13 44 52 .. .. .. 2.17 7 0 0 -33 18 12 23 49 13.5 19 357 -77 -32 20 29 -34 18 55 -13 17 58 .. .. .. 2.17 8 0 0 -32 35 19 23 49 10.3 20 356 -77 -31 39 9 -33 34 15 -12 52 13 .. .. .. 2.18 9 0 0 -31 54 53 23 49 7.0 21 355 -78 -31 0 6 -32 52 13 -12 27 35 .. .. .. 2.18 10 0 0 -31 16 46 23 49 3.7 21 355 -78 -30 23 14 -32 12 42 -12 4 5 .. .. .. 2.18 11 0 0 -30 40 53 23 49 0.4 22 354 -78 -29 48 28 -31 35 32 -11 41 41 .. .. .. 2.19 12 0 0 -30 7 6 23 48 57.0 22 353 -78 -29 15 42 -31 0 36 -11 20 23 .. .. .. 2.19 13 0 0 -29 35 22 23 48 53.7 23 352 -78 -28 44 53 -30 27 50 -11 0 11 .. .. .. 2.19 14 0 0 -29 5 34 23 48 50.3 23 351 -78 -28 15 55 -29 57 7 -10 41 4 .. .. .. 2.19 15 0 0 -28 37 41 23 48 46.9 23 350 -77 -27 48 47 -29 28 23 -10 23 1 .. .. .. 2.19 16 0 0 -28 11 38 23 48 43.5 24 349 -77 -27 23 25 -29 1 34 -10 6 3 .. .. .. 2.20 17 0 0 -27 47 22 23 48 40.2 24 349 -76 -26 59 47 -28 36 36 - 9 50 8 .. .. .. 2.20 18 0 0 -27 24 51 23 48 36.8 24 348 -76 -26 37 49 -28 13 28 - 9 35 17 .. .. .. 2.20 19 0 0 -27 4 1 23 48 33.4 24 347 -75 -26 17 31 -27 52 5 - 9 21 28 .. .. .. 2.20 20 0 0 -26 44 52 23 48 30.1 24 346 -74 -25 58 49 -27 32 25 - 9 8 41 .. .. .. 2.20 21 0 0 -26 27 21 23 48 26.7 24 345 -74 -25 41 42 -27 14 27 - 8 56 57 .. .. .. 2.20 22 0 0 -26 11 26 23 48 23.4 24 344 -73 -25 26 10 -26 58 8 - 8 46 14 .. .. .. 2.21 23 0 0 -25 57 7 23 48 20.1 24 343 -72 -25 12 9 -26 43 27 - 8 36 33 .. .. .. 2.21 24 0 0 -25 44 21 23 48 16.8 24 343 -71 -24 59 40 -26 30 22 - 8 27 54 .. .. .. 2.21 25 0 0 -25 33 7 23 48 13.5 24 342 -70 -24 48 42 -26 18 52 - 8 20 15 .. .. .. 2.21 26 0 0 -25 23 25 23 48 10.3 24 341 -70 -24 39 13 -26 8 56 - 8 13 37 .. .. .. 2.21 27 0 0 -25 15 14 23 48 7.1 24 340 -69 -24 31 12 -26 0 33 - 8 8 0 .. .. .. 2.21 28 0 0 -25 8 33 23 48 3.9 24 339 -68 -24 24 39 -25 53 43 - 8 3 23 .. .. .. 2.21 29 0 0 -25 3 21 23 48 0.7 23 338 -67 -24 19 34 -25 48 24 - 7 59 47 .. .. .. 2.22 30 0 0 -24 59 39 23 47 57.6 23 338 -66 -24 15 57 -25 44 37 - 7 57 12 .. .. .. 2.22 31 0 0 -24 57 26 23 47 54.6 23 337 -65 -24 13 46 -25 42 22 - 7 55 36 .. .. .. 2.22 32 0 0 -24 56 42 23 47 51.5 23 336 -64 -24 13 2 -25 41 36 - 7 55 1 .. .. .. 2.22 33 0 0 -24 57 26 23 47 48.6 22 335 -63 -24 13 46 -25 42 22 - 7 55 27 .. .. .. 2.22 34 0 0 -24 59 39 23 47 45.6 22 335 -63 -24 15 56 -25 44 39 - 7 56 52 .. .. .. 2.22 35 0 0 -25 3 22 23 47 42.8 21 334 -62 -24 19 33 -25 48 27 - 7 59 18 .. .. .. 2.23 36 0 0 -25 8 34 23 47 39.9 21 333 -61 -24 24 38 -25 53 47 - 8 2 45 .. .. .. 2.23 37 0 0 -25 15 16 23 47 37.2 20 332 -60 -24 31 10 -26 0 39 - 8 7 12 .. .. .. 2.23 38 0 0 -25 23 28 23 47 34.5 20 332 -59 -24 39 12 -26 9 4 - 8 12 40 .. .. .. 2.23 39 0 0 -25 33 12 23 47 31.8 19 331 -58 -24 48 42 -26 19 3 - 8 19 10 .. .. .. 2.24 40 0 0 -25 44 29 23 47 29.2 19 330 -57 -24 59 43 -26 30 36 - 8 26 40 .. .. .. 2.24 41 0 0 -25 57 18 23 47 26.7 18 330 -56 -25 12 15 -26 43 45 - 8 35 12 .. .. .. 2.24 42 0 0 -26 11 43 23 47 24.3 17 329 -55 -25 26 19 -26 58 32 - 8 44 45 .. .. .. 2.25 43 0 0 -26 27 43 23 47 21.9 17 329 -54 -25 41 56 -27 14 58 - 8 55 21 .. .. .. 2.25 44 0 0 -26 45 21 23 47 19.6 16 328 -54 -25 59 9 -27 33 4 - 9 6 58 .. .. .. 2.25 45 0 0 -27 4 39 23 47 17.4 15 327 -53 -26 17 57 -27 52 53 - 9 19 39 .. .. .. 2.26 46 0 0 -27 25 38 23 47 15.3 14 327 -52 -26 38 25 -28 14 27 - 9 33 23 .. .. .. 2.26 47 0 0 -27 48 21 23 47 13.3 14 326 -51 -27 0 33 -28 37 49 - 9 48 10 .. .. .. 2.27 48 0 0 -28 12 50 23 47 11.4 13 326 -50 -27 24 24 -29 3 1 -10 4 1 .. .. .. 2.27 49 0 0 -28 39 9 23 47 9.6 12 325 -49 -27 50 0 -29 30 8 -10 20 56 .. .. .. 2.28 50 0 0 -29 7 21 23 47 7.9 11 324 -48 -28 17 24 -29 59 12 -10 38 56 .. .. .. 2.28 51 0 0 -29 37 29 23 47 6.3 10 324 -47 -28 46 40 -30 30 18 -10 58 2 .. .. .. 2.29 52 0 0 -30 9 37 23 47 4.8 9 323 -47 -29 17 51 -31 3 31 -11 18 14 .. .. .. 2.30 53 0 0 -30 43 50 23 47 3.4 8 323 -46 -29 51 2 -31 38 56 -11 39 32 .. .. .. 2.31 54 0 0 -31 20 15 23 47 2.2 7 322 -45 -30 26 16 -32 16 40 -12 1 58 .. .. .. 2.33 55 0 0 -31 58 56 23 47 1.2 6 322 -44 -31 3 39 -32 56 50 -12 25 32 .. .. .. 2.35 56 0 0 -32 40 1 23 47 0.2 5 321 -43 -31 43 18 -33 39 35 -12 50 14 .. .. .. 2.38 57 0 0 -33 23 39 23 46 59.5 4 321 -42 -32 25 19 -34 25 6 -13 16 5 .. .. .. 2.43 58 0 0 -34 9 59 23 46 58.9 3 320 -41 -33 9 50 -35 13 35 -13 43 6 .. .. .. 2.52 59 0 0 -34 59 14 23 46 58.5 2 319 -40 -33 57 1 -36 5 16 -14 11 18 .. .. .. 2.72 60 0 0 -35 51 37 23 46 58.3 1 319 -40 -34 47 3 .. .. .. -14 40 41 .. .. .. 3.79 61 0 0 .. .. .... .. .. .. .. .. .. -35 40 10 .. .. .. -15 11 16 .. .. .. .... 62 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -15 43 4 .. .. .. .... 63 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -16 16 6 .. .. .. .... 64 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -16 50 23 .. .. .. .... 65 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -17 25 55 .. .. .. .... 66 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -18 2 44 .. .. .. .... 67 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -18 40 49 .. .. .. .... 68 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -19 20 13 .. .. .. .... 69 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -20 0 56 .. .. .. .... 70 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -20 42 59 .. .. .. .... 71 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -21 26 23 .. .. .. .... 72 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -22 11 8 .. .. .. .... 73 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -22 57 16 .. .. .. .... 74 0 0 .. .. .... .. .. .. .. .. .. .. .. .. .. .. .. -23 44 47 .. .. .. .... Uncertainty in time = +/- 34 secs Prediction of 2023 Jul 15.2 Data for the target star ------------------------ * name: UCAC4 637-082296 * constellation : Cygnus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 59 49.5358 DE: +37 13 39.177 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 59 49.5358 DE: +37 13 39.177 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.200) * V mag [mag]: 14.4 * B mag [mag]: 14.7 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (342842) 2008 YB3 asteroid class: Centaur approx. diameter [km]: 67 approx. diameter ["]: 0.006 distance from Earth [AU]: 14.86710 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#19 date of fit: 2022 Feb 05 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): 0.098", 0.032", 4.89700000000001° remarks: * orbital elements for (342842)2008 YB3 : Mean anomaly = 122.5887758282 deg Arg. of pericenter = 330.2555032545 deg Long. of node = 112.4837235820 deg Inclination = 105.1373339254 deg Eccentricity = 0.4412457077 Semimajor axis = 11.5724643736 AU Perihelion dist = 6.4661641409 AU Mag: H = 9.46, G = 0.15 Epoch of elements : MJD 60511.99193888 TDT (2024 Jul 20.9919) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#192022Feb05,2.18,2024,7,20,23.806533,0.279136,-0.866180,-16.561614,-5.341202,0.000068,-0.004900,0.000001,0.000000 3.8437,37.2945,-175.48,20.41,False UCAC4 637-082296,19.99709327,37.2275491,14.68,14.36,14.19,0.0,0,,20.01244283,37.2945400,7.22,6.95,0,0,2 342842,2008 YB3,21.58,67.176,14.8671,0,0,-0.821,-3.15,,6.8,0 0,122.5639,2024,7,20,330.2555,112.4837,105.1373,0.44125,11.57246,6.46616,9.46,5.0,0.15 15.632,0.0980,0.0323,5,0.0913,Known errors,1.08,0,-1,-1 20240720_082296,60140.21 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 05:04 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org