IOTA/IOTA-ES occultation update for (4103) Chahine / TYC 1790-00672-1 event on 2009 Oct 11, 03:20 UT Visible from Summary ------- On 2009 Oct 11 UT, the 13 km diameter asteroid (4103) Chahine will occult a 9.7 mag star in the constellation Aries for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.1 mag to 13.8 mag (the magnitude of the asteroid) for at most 1.0 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 6 * date and approx. time of event: 2009 Oct 11, 03:12 - 2009 Oct 11, 03:27 UT * magnitude of target star: 9.7 * magnitude drop [mag]: 4.1 * estimated maximum duration [s]: 1.0 * Moon: 52 % sunlit, 56° distance * Sun: 147° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 14 * 1 sigma uncertainty interval [path widths]: +/- 11.40 * 1 sigma uncertainty interval [seconds]: +/- 4.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .148 +/- .133) * 1 sigma uncertainty ellipse (major, minor, PA): ( .185", .074", 49° ) * approx speed of asteroid's shadow [km/s]: 13.3216 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1790-00672-1 by 4103 Chahine on 2009 Oct 11 Centre Star Star Sun Path Limits Error Limits E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Longitude Longitude Longitude Longitude 17 4 41 -54 0 0 3 12 42 1 325 -7 17 12 47 16 56 35 ... .. .. 13 53 15 15 52 37 -53 0 0 3 12 42 2 326 -8 16 0 29 15 44 45 ... .. .. 12 46 22 14 43 9 -52 0 0 3 12 43 4 327 -9 14 50 48 14 35 29 ... .. .. 11 41 42 13 36 2 -51 0 0 3 12 44 5 327 -10 13 43 30 13 28 34 ... .. .. 10 39 1 12 31 2 -50 0 0 3 12 45 6 328 -11 12 38 20 12 23 45 ... .. .. 9 38 9 11 27 58 -49 0 0 3 12 46 7 329 -12 11 35 6 11 20 51 ... .. .. 8 38 55 10 26 39 -48 0 0 3 12 48 8 330 -13 10 33 37 10 19 40 13 13 7 7 41 9 9 26 54 -47 0 0 3 12 49 10 331 -14 9 33 44 9 20 4 12 9 52 6 44 44 8 28 35 -46 0 0 3 12 51 11 331 -15 8 35 17 8 21 54 11 8 18 5 49 31 7 31 35 -45 0 0 3 12 53 12 332 -16 7 38 9 7 25 1 10 8 15 4 55 25 6 35 46 -44 0 0 3 12 56 13 333 -17 6 42 13 6 29 18 9 9 35 4 2 19 5 41 1 -43 0 0 3 12 58 14 333 -18 5 47 21 5 34 40 8 12 11 3 10 6 4 47 14 -42 0 0 3 13 1 16 334 -19 4 53 29 4 41 0 7 15 55 2 18 42 3 54 21 -41 0 0 3 13 4 17 335 -20 4 0 30 3 48 12 6 20 42 1 28 3 3 2 16 -40 0 0 3 13 7 18 335 -21 3 8 19 2 56 12 5 26 26 0 38 2 2 10 53 -39 0 0 3 13 11 19 336 -22 2 16 52 2 4 55 4 33 2 - 0 11 23 1 20 10 -38 0 0 3 13 14 20 336 -23 1 26 3 1 14 16 3 40 24 - 1 0 17 0 30 1 -37 0 0 3 13 18 22 337 -24 0 35 50 0 24 11 2 48 28 - 1 48 43 - 0 19 38 -36 0 0 3 13 22 23 337 -26 - 0 13 52 - 0 25 23 1 57 10 - 2 36 45 - 1 8 48 -35 0 0 3 13 27 24 338 -27 - 1 3 7 - 1 14 30 1 6 25 - 3 24 27 - 1 57 35 -34 0 0 3 13 31 25 339 -28 - 1 51 58 - 2 3 13 0 16 11 - 4 11 50 - 2 46 2 -33 0 0 3 13 36 26 339 -29 - 2 40 27 - 2 51 36 - 0 33 37 - 4 58 59 - 3 34 10 -32 0 0 3 13 41 27 340 -30 - 3 28 39 - 3 39 42 - 1 23 1 - 5 45 55 - 4 22 4 -31 0 0 3 13 46 29 340 -31 - 4 16 36 - 4 27 33 - 2 12 6 - 6 32 42 - 5 9 47 -30 0 0 3 13 51 30 341 -32 - 5 4 21 - 5 15 12 - 3 0 53 - 7 19 22 - 5 57 19 -29 0 0 3 13 57 31 341 -33 - 5 51 56 - 6 2 43 - 3 49 26 - 8 5 58 - 6 44 46 -28 0 0 3 14 3 32 342 -34 - 6 39 25 - 6 50 7 - 4 37 48 - 8 52 32 - 7 32 8 -27 0 0 3 14 8 33 343 -35 - 7 26 49 - 7 37 27 - 5 26 0 - 9 39 7 - 8 19 28 -26 0 0 3 14 15 34 343 -36 - 8 14 11 - 8 24 45 - 6 14 7 - 10 25 44 - 9 6 49 -25 0 0 3 14 21 35 344 -38 - 9 1 34 - 9 12 5 - 7 2 10 - 11 12 27 - 9 54 14 -24 0 0 3 14 27 37 344 -39 - 9 49 0 - 9 59 27 - 7 50 11 - 11 59 16 - 10 41 43 -23 0 0 3 14 34 38 345 -40 - 10 36 30 - 10 46 56 - 8 38 14 - 12 46 16 - 11 29 20 -22 0 0 3 14 41 39 346 -41 - 11 24 9 - 11 34 32 - 9 26 20 - 13 33 27 - 12 17 7 -21 0 0 3 14 48 40 346 -42 - 12 11 57 - 12 22 18 - 10 14 32 - 14 20 52 - 13 5 6 -20 0 0 3 14 55 41 347 -43 - 12 59 57 - 13 10 16 - 11 2 52 - 15 8 33 - 13 53 20 -19 0 0 3 15 3 42 348 -44 - 13 48 11 - 13 58 29 - 11 51 23 - 15 56 33 - 14 41 50 -18 0 0 3 15 11 43 348 -45 - 14 36 42 - 14 46 59 - 12 40 6 - 16 44 54 - 15 30 39 -17 0 0 3 15 19 45 349 -47 - 15 25 31 - 15 35 47 - 13 29 4 - 17 33 38 - 16 19 50 -16 0 0 3 15 27 46 350 -48 - 16 14 42 - 16 24 58 - 14 18 20 - 18 22 48 - 17 9 24 -15 0 0 3 15 35 47 351 -49 - 17 4 16 - 17 14 32 - 15 7 55 - 19 12 25 - 17 59 25 -14 0 0 3 15 43 48 351 -50 - 17 54 17 - 18 4 33 - 15 57 52 - 20 2 33 - 18 49 54 -13 0 0 3 15 52 49 352 -51 - 18 44 46 - 18 55 3 - 16 48 14 - 20 53 14 - 19 40 55 -12 0 0 3 16 1 50 353 -52 - 19 35 46 - 19 46 5 - 17 39 3 - 21 44 31 - 20 32 30 -11 0 0 3 16 10 51 354 -54 - 20 27 20 - 20 37 40 - 18 30 22 - 22 36 27 - 21 24 42 -10 0 0 3 16 19 52 355 -55 - 21 19 31 - 21 29 53 - 19 22 13 - 23 29 4 - 22 17 33 - 9 0 0 3 16 29 53 357 -56 - 22 12 21 - 22 22 45 - 20 14 39 - 24 22 26 - 23 11 7 - 8 0 0 3 16 38 54 358 -57 - 23 5 54 - 23 16 21 - 21 7 44 - 25 16 36 - 24 5 28 - 7 0 0 3 16 48 55 359 -58 - 24 0 13 - 24 10 43 - 22 1 29 - 26 11 37 - 25 0 38 - 6 0 0 3 16 58 56 0 -60 - 24 55 21 - 25 5 55 - 22 55 59 - 27 7 34 - 25 56 41 - 5 0 0 3 17 8 57 2 -61 - 25 51 22 - 26 2 0 - 23 51 17 - 28 4 30 - 26 53 41 - 4 0 0 3 17 19 58 3 -62 - 26 48 20 - 26 59 3 - 24 47 26 - 29 2 29 - 27 51 42 - 3 0 0 3 17 29 59 5 -63 - 27 46 19 - 27 57 6 - 25 44 29 - 30 1 35 - 28 50 49 - 2 0 0 3 17 40 60 7 -65 - 28 45 23 - 28 56 16 - 26 42 33 - 31 1 55 - 29 51 6 - 1 0 0 3 17 51 61 9 -66 - 29 45 36 - 29 56 36 - 27 41 39 - 32 3 32 - 30 52 39 0 0 0 3 18 2 62 11 -67 - 30 47 6 - 30 58 12 - 28 41 53 - 33 6 34 - 31 55 32 1 0 0 3 18 14 63 13 -68 - 31 49 55 - 32 1 10 - 29 43 21 - 34 11 5 Latitude Latitude Latitude Latitude - 33 0 0 2 0 6 3 18 25 63 16 -70 2 5 21 1 54 51 4 3 37 - 0 6 11 - 34 0 0 2 54 47 3 18 36 64 18 -71 2 59 58 2 49 35 4 57 5 0 49 48 - 35 0 0 3 48 14 3 18 47 64 20 -72 3 53 23 3 43 6 5 49 21 1 44 31 - 36 0 0 4 40 28 3 18 57 65 23 -73 4 45 33 4 35 22 6 40 25 2 38 0 - 37 0 0 5 31 29 3 19 8 65 25 -74 5 36 31 5 26 26 7 30 17 3 30 13 - 38 0 0 6 21 16 3 19 18 65 28 -75 6 26 15 6 16 16 8 18 58 4 21 12 - 39 0 0 7 9 51 3 19 29 66 31 -76 7 14 47 7 4 54 9 6 27 5 10 56 - 40 0 0 7 57 13 3 19 39 66 33 -77 8 2 7 7 52 19 9 52 46 5 59 26 - 41 0 0 8 43 23 3 19 49 66 36 -78 8 48 14 8 38 32 10 37 54 6 46 42 - 42 0 0 9 28 22 3 19 59 66 38 -79 9 33 11 9 23 33 11 21 52 7 32 46 - 43 0 0 10 12 10 3 20 9 66 41 -79 10 16 56 10 7 24 12 4 41 8 17 36 - 44 0 0 10 54 48 3 20 19 66 43 -80 10 59 32 10 50 5 12 46 22 9 1 15 - 45 0 0 11 36 17 3 20 29 66 46 -81 11 40 58 11 31 36 13 26 54 9 43 43 - 46 0 0 12 16 37 3 20 38 65 48 -81 12 21 15 12 11 58 14 6 19 10 25 1 - 47 0 0 12 55 48 3 20 48 65 50 -81 13 0 25 12 51 12 14 44 37 11 5 8 - 48 0 0 13 33 53 3 20 57 65 52 -81 13 38 27 13 29 18 15 21 50 11 44 7 - 49 0 0 14 10 50 3 21 6 64 54 -82 14 15 23 14 6 18 15 57 57 12 21 58 - 50 0 0 14 46 43 3 21 15 64 56 -81 14 51 13 14 42 12 16 33 1 12 58 41 - 51 0 0 15 21 30 3 21 24 64 58 -81 15 25 58 15 17 2 17 7 1 13 34 18 - 52 0 0 15 55 13 3 21 33 63 59 -81 15 59 39 15 50 47 17 39 58 14 8 50 - 53 0 0 16 27 53 3 21 42 63 61 -81 16 32 17 16 23 29 18 11 53 14 42 16 - 54 0 0 16 59 30 3 21 51 62 62 -80 17 3 52 16 55 8 18 42 47 15 14 39 - 55 0 0 17 30 6 3 21 59 61 64 -79 17 34 26 17 25 45 19 12 41 15 45 58 - 56 0 0 17 59 41 3 22 7 61 65 -79 18 4 0 17 55 22 19 41 36 16 16 15 - 57 0 0 18 28 16 3 22 16 60 66 -78 18 32 33 18 23 59 20 9 32 16 45 31 - 58 0 0 18 55 51 3 22 24 59 67 -77 19 0 7 18 51 36 20 36 30 17 13 46 - 59 0 0 19 22 29 3 22 32 59 68 -77 19 26 42 19 18 15 21 2 30 17 41 1 - 60 0 0 19 48 8 3 22 40 58 69 -76 19 52 20 19 43 55 21 27 35 18 7 17 - 61 0 0 20 12 50 3 22 47 57 70 -75 20 17 1 20 8 39 21 51 43 18 32 35 - 62 0 0 20 36 37 3 22 55 57 70 -74 20 40 46 20 32 27 22 14 57 18 56 55 - 63 0 0 20 59 27 3 23 2 56 71 -74 21 3 35 20 55 19 22 37 16 19 20 18 - 64 0 0 21 21 23 3 23 10 55 72 -73 21 25 30 21 17 16 22 58 42 19 42 45 - 65 0 0 21 42 25 3 23 17 54 72 -72 21 46 30 21 38 19 23 19 15 20 4 17 - 66 0 0 22 2 33 3 23 24 54 73 -71 22 6 37 21 58 28 23 38 55 20 24 54 - 67 0 0 22 21 48 3 23 31 53 73 -70 22 25 51 22 17 45 23 57 44 20 44 36 - 68 0 0 22 40 11 3 23 38 52 73 -70 22 44 13 22 36 9 24 15 42 21 3 25 - 69 0 0 22 57 42 3 23 45 51 74 -69 23 1 44 22 53 41 24 32 49 21 21 21 - 70 0 0 23 14 22 3 23 51 51 74 -68 23 18 23 23 10 22 24 49 7 21 38 25 - 71 0 0 23 30 12 3 23 58 50 74 -67 23 34 11 23 26 12 25 4 34 21 54 37 - 72 0 0 23 45 11 3 24 4 49 74 -66 23 49 10 23 41 13 25 19 13 22 9 58 - 73 0 0 23 59 21 3 24 11 48 74 -65 24 3 19 23 55 23 25 33 4 22 24 27 - 74 0 0 24 12 41 3 24 17 47 75 -65 24 16 38 24 8 44 25 46 6 22 38 7 - 75 0 0 24 25 13 3 24 23 47 75 -64 24 29 9 24 21 17 25 58 21 22 50 56 - 76 0 0 24 36 57 3 24 29 46 75 -63 24 40 52 24 33 1 26 9 48 23 2 56 - 77 0 0 24 47 52 3 24 35 45 75 -62 24 51 47 24 43 57 26 20 29 23 14 7 - 78 0 0 24 58 0 3 24 41 44 75 -61 25 1 54 24 54 6 26 30 23 23 24 29 - 79 0 0 25 7 20 3 24 46 43 75 -60 25 11 14 25 3 27 26 39 31 23 34 2 - 80 0 0 25 15 54 3 24 52 43 75 -60 25 19 47 25 12 1 26 47 53 23 42 47 - 81 0 0 25 23 41 3 24 57 42 74 -59 25 27 33 25 19 48 26 55 29 23 50 45 - 82 0 0 25 30 41 3 25 3 41 74 -58 25 34 33 25 26 48 27 2 20 23 57 55 - 83 0 0 25 36 55 3 25 8 40 74 -57 25 40 47 25 33 3 27 8 26 24 4 17 - 84 0 0 25 42 23 3 25 13 39 74 -56 25 46 14 25 38 31 27 13 47 24 9 52 - 85 0 0 25 47 4 3 25 18 38 74 -56 25 50 56 25 43 13 27 18 23 24 14 40 - 86 0 0 25 51 0 3 25 23 38 74 -55 25 54 51 25 47 9 27 22 14 24 18 41 - 87 0 0 25 54 10 3 25 28 37 74 -54 25 58 1 25 50 19 27 25 20 24 21 55 - 88 0 0 25 56 35 3 25 33 36 73 -53 26 0 26 25 52 44 27 27 42 24 24 22 - 89 0 0 25 58 14 3 25 38 35 73 -52 26 2 5 25 54 23 27 29 19 24 26 3 - 90 0 0 25 59 7 3 25 42 34 73 -51 26 2 58 25 55 16 27 30 11 24 26 56 - 91 0 0 25 59 14 3 25 47 33 73 -51 26 3 5 25 55 23 27 30 19 24 27 3 - 92 0 0 25 58 36 3 25 51 33 72 -50 26 2 27 25 54 45 27 29 43 24 26 23 - 93 0 0 25 57 12 3 25 55 32 72 -49 26 1 3 25 53 21 27 28 22 24 24 56 - 94 0 0 25 55 2 3 26 0 31 72 -48 25 58 53 25 51 11 27 26 16 24 22 42 - 95 0 0 25 52 6 3 26 4 30 72 -47 25 55 58 25 48 14 27 23 24 24 19 41 - 96 0 0 25 48 24 3 26 8 29 71 -47 25 52 16 25 44 32 27 19 48 24 15 52 - 97 0 0 25 43 55 3 26 12 28 71 -46 25 47 47 25 40 3 27 15 27 24 11 16 - 98 0 0 25 38 40 3 26 15 27 71 -45 25 42 32 25 34 47 27 10 20 24 5 52 - 99 0 0 25 32 38 3 26 19 27 70 -44 25 36 30 25 28 45 27 4 27 23 59 40 -100 0 0 25 25 48 3 26 23 26 70 -43 25 29 41 25 21 55 26 57 48 23 52 39 -101 0 0 25 18 11 3 26 26 25 70 -42 25 22 5 25 14 17 26 50 23 23 44 49 -102 0 0 25 9 46 3 26 30 24 69 -42 25 13 40 25 5 51 26 42 11 23 36 11 -103 0 0 25 0 33 3 26 33 23 69 -41 25 4 28 24 56 38 26 33 12 23 26 43 -104 0 0 24 50 31 3 26 36 22 69 -40 24 54 26 24 46 35 26 23 26 23 16 25 -105 0 0 24 39 39 3 26 39 21 68 -39 24 43 36 24 35 43 26 12 51 23 5 16 -106 0 0 24 27 58 3 26 42 20 68 -38 24 31 56 24 24 1 26 1 28 22 53 16 -107 0 0 24 15 27 3 26 45 19 68 -37 24 19 25 24 11 29 25 49 16 22 40 25 -108 0 0 24 2 5 3 26 48 19 67 -37 24 6 4 23 58 6 25 36 14 22 26 42 -109 0 0 23 47 52 3 26 51 18 67 -36 23 51 52 23 43 52 25 22 23 22 12 6 -110 0 0 23 32 47 3 26 53 17 67 -35 23 36 47 23 28 46 25 7 41 21 56 37 -111 0 0 23 16 49 3 26 56 16 66 -34 23 20 50 23 12 47 24 52 7 21 40 13 -112 0 0 22 59 57 3 26 58 15 66 -33 23 4 0 22 55 54 24 35 41 21 22 55 -113 0 0 22 42 12 3 27 0 14 65 -32 22 46 16 22 38 8 24 18 23 21 4 41 -114 0 0 22 23 31 3 27 2 13 65 -31 22 27 37 22 19 26 24 0 11 20 45 31 -115 0 0 22 3 55 3 27 4 12 65 -30 22 8 2 21 59 49 23 41 5 20 25 24 -116 0 0 21 43 23 3 27 6 11 64 -30 21 47 31 21 39 15 23 21 4 20 4 18 -117 0 0 21 21 53 3 27 7 10 64 -29 21 26 2 21 17 43 23 0 7 19 42 14 -118 0 0 20 59 25 3 27 9 9 64 -28 21 3 35 20 55 14 22 38 13 19 19 9 -119 0 0 20 35 57 3 27 10 8 63 -27 20 40 9 20 31 44 22 15 21 18 55 4 -120 0 0 20 11 29 3 27 12 7 63 -26 20 15 43 20 7 15 21 51 31 18 29 57 -121 0 0 19 46 0 3 27 13 6 63 -25 19 50 16 19 41 44 .. .. .. 18 3 47 -122 0 0 19 19 29 3 27 14 5 62 -24 19 23 46 19 15 11 .. .. .. 17 36 33 -123 0 0 18 51 54 3 27 14 4 62 -23 18 56 13 18 47 34 .. .. .. 17 8 13 -124 0 0 18 23 14 3 27 15 3 62 -22 18 27 35 18 18 53 .. .. .. 16 38 48 -125 0 0 17 53 29 3 27 15 2 61 -21 17 57 52 17 49 6 .. .. .. 16 8 14 -126 0 0 17 22 37 3 27 15 1 61 -20 17 27 2 17 18 12 .. .. .. .. .. .. Uncertainty in time = +/- 11 secs [Prediction of 2008 Apr 25.0] Data for the target star ------------------------ * name: TYC 1790-00672-1 * constellation : Aries * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 02 56 50.2435 DE: +27 38 32.412 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .016, .018 ) * V mag [mag]: 9.7 * B mag [mag]: 10.8 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4103) Chahine approx. diameter [km]: 13 approx. diameter ["]: .016 distance from Earth [AU]: 1.10400 * orbital information: orbit source: Preston date of fit: 2008 Apr 25 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 573 number of rejected observations: 5 time covered by the observations: 1949 Apr 04 - 2008 Mar 15 1 sigma uncertainty ellipse (major, minor, PA): 0.184, 0.072, 49° remarks: * orbital elements for (4103) Chahine : Mean anomaly = 29.99630614 deg Arg. of pericenter = 328.87056987 deg Long. of node = 23.26978566 deg Inclination = 26.99038288 deg Eccentricity = 0.19173926 Semimajor axis = 2.38002971 AU Perihelion dist = 1.92368458 AU Mag: H = 11.17, G = 0.15 Epoch of elements : MJD 55115.13900000 TDT (2009 Oct 11.139) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Oct 11 4103 Chahine 3h 20.0m UT 9.7 2 56 50.244 27 38 32.41TYC 1790-00672-1 10.8 13.8 13 1.0 1.104 -3.285 41.06 -25.6385 27.630 126.71 -7.04 3.3328 -0.27862 -0.29626 -5.47479 5.15398 -0.00249 -0.00160 2000 28.616846200910 6.00000328.870570 23.269786 26.9903830.19173926 2.3800297 1.923684611.2 5.00.15 RATE 2.6842970 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.185 0.074 49 12.40 0.185 0 54581.5020091011_0672-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Apr 25, 08:56 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org