IOTA/IOTA-ES occultation update for (43) Ariadne / TYC 1864-01023-1 event on 2012 Nov 20, 05:31 UT Visible from W Africa, Venezuela, Colombia Summary ------- On 2012 Nov 20 UT, the 66 km diameter asteroid (43) Ariadne will occult a 10.5 mag star in the constellation Gemini for observers along a path across W Africa, Venezuela, Colombia. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.6 mag to 11.8 mag (the magnitude of the asteroid) for at most 7.4 seconds. This update is based on UNSO/Flagstaff astrometry for the asteroid kindly provided by Alice Monet, TMO astrometry for the asteroid kindly provided by Bill Owen, historical astrometry from the MPC files (via AstDys), and the following catalogs for the star position: UCAC. The event at a glimpse ---------------------- * Rank: 87 * date and approx. time of event: 2012 Nov 20, 05:21 - 2012 Nov 20, 05:42 UT * geocentric midpoint of event [JD]: 2456251.7298 * magnitude of target star: 10.5 * magnitude drop [mag]: 1.6 * estimated maximum duration [s]: 7.4 * Moon: 46 % sunlit, 128° distance * Sun: 146° distance * rough path description: W Africa, Venezuela, Colombia Additional comments ------------------- 10" double star The occultation path -------------------- * approximate projected width [km]: 68 * 1 sigma uncertainty interval [path widths]: +/- 0.57 * 1 sigma uncertainty interval [seconds]: +/- 2.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .023 +/- .032) * 1 sigma uncertainty ellipse (major, minor, PA): ( .032", .023", 0° ) * approx speed of asteroid's shadow [km/s]: 8.8871 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1864-01023-1 by 43 Ariadne on 2012 Nov 20 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 ' " Latitude Latitude Latitude Latitude -135 0 0 -17 34 53 5 42 30 0 65 -32 -17 14 24 .. .. .. -16 51 6 .. .. .. -134 0 0 -17 7 45 5 42 30 1 64 -33 -16 47 16 -17 28 17 -16 23 58 -17 51 43 -133 0 0 -16 40 33 5 42 30 2 64 -34 -16 20 4 -17 1 5 -15 56 46 -17 24 31 -132 0 0 -16 13 18 5 42 29 3 64 -35 -15 52 49 -16 33 49 -15 29 30 -16 57 15 -131 0 0 -15 45 59 5 42 28 4 64 -36 -15 25 30 -16 6 30 -15 2 12 -16 29 56 -130 0 0 -15 18 38 5 42 27 5 63 -37 -14 58 9 -15 39 9 -14 34 51 -16 2 35 -129 0 0 -14 51 16 5 42 25 6 63 -38 -14 30 47 -15 11 46 -14 7 29 -15 35 12 -128 0 0 -14 23 53 5 42 24 8 63 -39 -14 3 24 -14 44 23 -13 40 7 -15 7 48 -127 0 0 -13 56 29 5 42 22 9 63 -40 -13 36 2 -14 16 59 -13 12 45 -14 40 24 -126 0 0 -13 29 6 5 42 20 10 62 -41 -13 8 39 -13 49 36 -12 45 23 -14 13 0 -125 0 0 -13 1 45 5 42 17 11 62 -42 -12 41 19 -13 22 14 -12 18 3 -13 45 37 -124 0 0 -12 34 26 5 42 15 12 62 -43 -12 14 0 -12 54 54 -11 50 45 -13 18 16 -123 0 0 -12 7 9 5 42 12 13 62 -44 -11 46 44 -12 27 36 -11 23 30 -12 50 58 -122 0 0 -11 39 56 5 42 8 14 61 -45 -11 19 32 -12 0 22 -10 56 19 -12 23 42 -121 0 0 -11 12 47 5 42 5 15 61 -46 -10 52 24 -11 33 12 -10 29 12 -11 56 31 -120 0 0 -10 45 42 5 42 1 16 61 -47 -10 25 20 -11 6 7 -10 2 10 -11 29 25 -119 0 0 -10 18 43 5 41 57 17 61 -48 - 9 58 22 -10 39 7 - 9 35 13 -11 2 24 -118 0 0 - 9 51 51 5 41 53 18 61 -49 - 9 31 31 -10 12 13 - 9 8 23 -10 35 28 -117 0 0 - 9 25 5 5 41 49 19 60 -50 - 9 4 46 - 9 45 25 - 8 41 39 -10 8 40 -116 0 0 - 8 58 26 5 41 44 20 60 -51 - 8 38 9 - 9 18 46 - 8 15 4 - 9 41 58 -115 0 0 - 8 31 56 5 41 39 21 60 -52 - 8 11 40 - 8 52 14 - 7 48 36 - 9 15 25 -114 0 0 - 8 5 34 5 41 34 22 60 -53 - 7 45 19 - 8 25 50 - 7 22 17 - 8 49 0 -113 0 0 - 7 39 21 5 41 29 23 60 -54 - 7 19 8 - 7 59 36 - 6 56 8 - 8 22 44 -112 0 0 - 7 13 19 5 41 23 25 60 -55 - 6 53 7 - 7 33 32 - 6 30 8 - 7 56 38 -111 0 0 - 6 47 26 5 41 17 26 59 -56 - 6 27 16 - 7 7 38 - 6 4 20 - 7 30 43 -110 0 0 - 6 21 45 5 41 11 27 59 -57 - 6 1 37 - 6 41 56 - 5 38 42 - 7 4 58 -109 0 0 - 5 56 16 5 41 5 28 59 -58 - 5 36 9 - 6 16 24 - 5 13 16 - 6 39 25 -108 0 0 - 5 30 58 5 40 59 29 59 -58 - 5 10 53 - 5 51 5 - 4 48 2 - 6 14 4 -107 0 0 - 5 5 53 5 40 52 30 59 -59 - 4 45 50 - 5 25 59 - 4 23 1 - 5 48 55 -106 0 0 - 4 41 2 5 40 45 31 58 -60 - 4 21 0 - 5 1 5 - 3 58 13 - 5 24 0 -105 0 0 - 4 16 24 5 40 38 32 58 -61 - 3 56 24 - 4 36 26 - 3 33 39 - 4 59 18 -104 0 0 - 3 52 0 5 40 31 33 58 -62 - 3 32 2 - 4 12 0 - 3 9 19 - 4 34 50 -103 0 0 - 3 27 51 5 40 24 34 58 -63 - 3 7 55 - 3 47 49 - 2 45 14 - 4 10 37 -102 0 0 - 3 3 57 5 40 16 35 58 -64 - 2 44 3 - 3 23 53 - 2 21 24 - 3 46 39 -101 0 0 - 2 40 18 5 40 8 36 58 -64 - 2 20 26 - 3 0 13 - 1 57 50 - 3 22 56 -100 0 0 - 2 16 56 5 40 0 37 57 -65 - 1 57 6 - 2 36 48 - 1 34 31 - 2 59 29 - 99 0 0 - 1 53 50 5 39 52 38 57 -66 - 1 34 2 - 2 13 40 - 1 11 29 - 2 36 19 - 98 0 0 - 1 31 0 5 39 44 39 57 -67 - 1 11 14 - 1 50 48 - 0 48 44 - 2 13 25 - 97 0 0 - 1 8 28 5 39 35 40 57 -67 - 0 48 44 - 1 28 14 - 0 26 16 - 1 50 48 - 96 0 0 - 0 46 13 5 39 27 41 57 -68 - 0 26 31 - 1 5 57 - 0 4 5 - 1 28 29 - 95 0 0 - 0 24 16 5 39 18 42 56 -69 - 0 4 36 - 0 43 58 0 17 47 - 1 6 28 - 94 0 0 - 0 2 37 5 39 9 43 56 -69 0 17 1 - 0 22 17 0 39 22 - 0 44 45 - 93 0 0 0 18 43 5 39 0 44 56 -70 0 38 19 - 0 0 55 1 0 38 - 0 23 20 - 92 0 0 0 39 45 5 38 50 45 56 -71 0 59 19 0 20 9 1 21 35 - 0 2 14 - 91 0 0 1 0 27 5 38 41 46 55 -71 1 19 59 0 40 53 1 42 13 0 18 32 - 90 0 0 1 20 50 5 38 32 47 55 -71 1 40 20 1 1 18 2 2 31 0 39 0 - 89 0 0 1 40 53 5 38 22 48 55 -72 2 0 21 1 21 23 2 22 30 0 59 7 - 88 0 0 2 0 36 5 38 12 49 55 -72 2 20 2 1 41 9 2 42 9 1 18 55 - 87 0 0 2 20 0 5 38 2 50 54 -73 2 39 24 2 0 34 3 1 28 1 38 23 - 86 0 0 2 39 2 5 37 52 51 54 -73 2 58 24 2 19 38 3 20 27 1 57 30 - 85 0 0 2 57 44 5 37 42 52 54 -73 3 17 4 2 38 23 3 39 5 2 16 16 - 84 0 0 3 16 6 5 37 32 53 53 -73 3 35 24 2 56 46 3 57 22 2 34 41 - 83 0 0 3 34 6 5 37 21 54 53 -73 3 53 22 3 14 48 4 15 18 2 52 46 - 82 0 0 3 51 45 5 37 11 55 53 -73 4 10 59 3 32 29 4 32 53 3 10 29 - 81 0 0 4 9 2 5 37 0 56 52 -73 4 28 14 3 49 48 4 50 6 3 27 50 - 80 0 0 4 25 58 5 36 50 57 52 -73 4 45 8 4 6 46 5 6 58 3 44 50 - 79 0 0 4 42 32 5 36 39 57 51 -73 5 1 41 4 23 22 5 23 28 4 1 28 - 78 0 0 4 58 44 5 36 28 58 51 -72 5 17 51 4 39 36 5 39 36 4 17 45 - 77 0 0 5 14 34 5 36 17 59 50 -72 5 33 39 4 55 28 5 55 22 4 33 39 - 76 0 0 5 30 2 5 36 6 60 49 -72 5 49 6 5 10 58 6 10 47 4 49 11 - 75 0 0 5 45 8 5 35 55 61 49 -71 6 4 9 5 26 5 6 25 49 5 4 20 - 74 0 0 5 59 51 5 35 44 62 48 -71 6 18 51 5 40 50 6 40 28 5 19 7 - 73 0 0 6 14 12 5 35 33 63 47 -70 6 33 10 5 55 12 6 54 45 5 33 31 - 72 0 0 6 28 10 5 35 22 64 46 -70 6 47 6 6 9 12 7 8 39 5 47 33 - 71 0 0 6 41 45 5 35 11 64 45 -69 7 0 40 6 22 49 7 22 11 6 1 11 - 70 0 0 6 54 57 5 34 59 65 44 -69 7 13 50 6 36 3 7 35 20 6 14 27 - 69 0 0 7 7 47 5 34 48 66 43 -68 7 26 38 6 48 54 7 48 6 6 27 20 - 68 0 0 7 20 13 5 34 36 67 42 -68 7 39 3 7 1 21 8 0 29 6 39 49 - 67 0 0 7 32 16 5 34 25 68 41 -67 7 51 5 7 13 26 8 12 29 6 51 56 - 66 0 0 7 43 56 5 34 13 68 40 -66 8 2 43 7 25 8 8 24 6 7 3 39 - 65 0 0 7 55 13 5 34 2 69 38 -66 8 13 59 7 36 26 8 35 20 7 14 59 - 64 0 0 8 6 7 5 33 50 70 37 -65 8 24 51 7 47 21 8 46 11 7 25 55 - 63 0 0 8 16 37 5 33 39 71 35 -64 8 35 20 7 57 52 8 56 38 7 36 28 - 62 0 0 8 26 44 5 33 27 71 33 -63 8 45 25 8 8 0 9 6 42 7 46 38 - 61 0 0 8 36 27 5 33 15 72 31 -63 8 55 8 8 17 45 9 16 23 7 56 24 - 60 0 0 8 45 47 5 33 4 72 29 -62 9 4 26 8 27 6 9 25 40 8 5 46 - 59 0 0 8 54 43 5 32 52 73 27 -61 9 13 21 8 36 3 9 34 34 8 14 45 - 58 0 0 9 3 16 5 32 40 73 24 -60 9 21 53 8 44 37 9 43 5 8 23 20 - 57 0 0 9 11 25 5 32 28 74 21 -59 9 30 1 8 52 47 9 51 11 8 31 31 - 56 0 0 9 19 10 5 32 17 74 19 -59 9 37 45 9 0 33 9 58 55 8 39 18 - 55 0 0 9 26 32 5 32 5 75 16 -58 9 45 6 9 7 56 10 6 14 8 46 42 - 54 0 0 9 33 30 5 31 53 75 12 -57 9 52 3 9 14 55 10 13 10 8 53 42 - 53 0 0 9 40 4 5 31 41 75 9 -56 9 58 36 9 21 30 10 19 43 9 0 18 - 52 0 0 9 46 14 5 31 29 76 6 -55 10 4 46 9 27 41 10 25 51 9 6 30 - 51 0 0 9 52 1 5 31 18 76 2 -54 10 10 32 9 33 28 10 31 36 9 12 18 - 50 0 0 9 57 23 5 31 6 76 359 -54 10 15 54 9 38 52 10 36 58 9 17 43 - 49 0 0 10 2 22 5 30 54 76 355 -53 10 20 52 9 43 51 10 41 55 9 22 43 - 48 0 0 10 6 57 5 30 42 76 352 -52 10 25 26 9 48 27 10 46 29 9 27 19 - 47 0 0 10 11 9 5 30 31 76 348 -51 10 29 37 9 52 39 10 50 39 9 31 31 - 46 0 0 10 14 56 5 30 19 76 345 -50 10 33 24 9 56 26 10 54 25 9 35 20 - 45 0 0 10 18 19 5 30 7 75 341 -49 10 36 47 9 59 50 10 57 47 9 38 44 - 44 0 0 10 21 18 5 29 55 75 338 -48 10 39 46 10 2 50 11 0 46 9 41 44 - 43 0 0 10 23 54 5 29 44 75 335 -48 10 42 21 10 5 26 11 3 21 9 44 20 - 42 0 0 10 26 5 5 29 32 74 332 -47 10 44 32 10 7 37 11 5 31 9 46 32 - 41 0 0 10 27 53 5 29 20 74 329 -46 10 46 19 10 9 25 11 7 18 9 48 20 - 40 0 0 10 29 16 5 29 9 74 327 -45 10 47 42 10 10 48 11 8 41 9 49 44 - 39 0 0 10 30 15 5 28 57 73 324 -44 10 48 42 10 11 48 11 9 41 9 50 44 - 38 0 0 10 30 51 5 28 46 72 322 -43 10 49 17 10 12 23 11 10 16 9 51 19 - 37 0 0 10 31 2 5 28 34 72 320 -42 10 49 28 10 12 35 11 10 27 9 51 30 - 36 0 0 10 30 49 5 28 23 71 318 -41 10 49 15 10 12 22 11 10 15 9 51 18 - 35 0 0 10 30 13 5 28 11 71 316 -40 10 48 39 10 11 45 11 9 38 9 50 41 - 34 0 0 10 29 12 5 28 0 70 314 -40 10 47 38 10 10 44 11 8 37 9 49 39 - 33 0 0 10 27 47 5 27 49 69 313 -39 10 46 13 10 9 19 11 7 13 9 48 14 - 32 0 0 10 25 58 5 27 37 69 311 -38 10 44 25 10 7 30 11 5 24 9 46 24 - 31 0 0 10 23 45 5 27 26 68 310 -37 10 42 12 10 5 16 11 3 12 9 44 10 - 30 0 0 10 21 7 5 27 15 67 309 -36 10 39 35 10 2 38 11 0 35 9 41 32 - 29 0 0 10 18 6 5 27 4 66 308 -35 10 36 34 9 59 37 10 57 35 9 38 30 - 28 0 0 10 14 40 5 26 53 65 307 -34 10 33 9 9 56 11 10 54 10 9 35 3 - 27 0 0 10 10 51 5 26 42 65 306 -33 10 29 20 9 52 20 10 50 22 9 31 13 - 26 0 0 10 6 37 5 26 31 64 305 -32 10 25 6 9 48 6 10 46 9 9 26 58 - 25 0 0 10 1 59 5 26 20 63 304 -31 10 20 29 9 43 27 10 41 33 9 22 18 - 24 0 0 9 56 57 5 26 9 62 304 -30 10 15 28 9 38 24 10 36 32 9 17 15 - 23 0 0 9 51 30 5 25 58 61 303 -29 10 10 2 9 32 57 10 31 7 9 11 47 - 22 0 0 9 45 40 5 25 47 61 302 -29 10 4 12 9 27 6 10 25 19 9 5 54 - 21 0 0 9 39 25 5 25 37 60 302 -28 9 57 59 9 20 51 10 19 6 8 59 38 - 20 0 0 9 32 47 5 25 26 59 301 -27 9 51 21 9 14 11 10 12 29 8 52 57 - 19 0 0 9 25 44 5 25 16 58 301 -26 9 44 19 9 7 7 10 5 28 8 45 52 - 18 0 0 9 18 16 5 25 5 57 300 -25 9 36 53 8 59 39 9 58 3 8 38 23 - 17 0 0 9 10 25 5 24 55 56 300 -24 9 29 2 8 51 47 9 50 14 8 30 29 - 16 0 0 9 2 10 5 24 45 55 300 -23 9 20 48 8 43 30 9 42 1 8 22 12 - 15 0 0 8 53 30 5 24 35 54 299 -22 9 12 10 8 34 49 9 33 24 8 13 30 - 14 0 0 8 44 27 5 24 25 54 299 -21 9 3 7 8 25 45 9 24 23 8 4 23 - 13 0 0 8 34 59 5 24 15 53 299 -20 8 53 41 8 16 16 9 14 58 7 54 53 - 12 0 0 8 25 7 5 24 5 52 298 -19 8 43 50 8 6 22 9 5 9 7 44 58 - 11 0 0 8 14 51 5 23 55 51 298 -18 8 33 36 7 56 5 8 54 56 7 34 40 - 10 0 0 8 4 11 5 23 46 50 298 -17 8 22 57 7 45 24 8 44 19 7 23 57 - 9 0 0 7 53 8 5 23 36 49 298 -16 8 11 55 7 34 19 8 33 18 7 12 50 - 8 0 0 7 41 40 5 23 27 48 298 -15 8 0 28 7 22 49 8 21 53 7 1 19 - 7 0 0 7 29 48 5 23 18 47 297 -14 7 48 38 7 10 56 8 10 5 6 49 24 - 6 0 0 7 17 32 5 23 8 46 297 -13 7 36 24 6 58 39 7 57 52 6 37 5 - 5 0 0 7 4 53 5 22 59 45 297 -12 7 23 46 6 45 58 7 45 16 6 24 22 - 4 0 0 6 51 50 5 22 50 44 297 -11 7 10 45 6 32 53 7 32 17 6 11 15 - 3 0 0 6 38 23 5 22 42 43 297 -10 6 57 20 6 19 24 7 18 54 5 57 45 - 2 0 0 6 24 32 5 22 33 42 297 -9 6 43 31 6 5 32 7 5 7 5 43 50 - 1 0 0 6 10 18 5 22 25 41 297 -8 6 29 19 5 51 16 6 50 56 5 29 32 0 0 0 5 55 41 5 22 16 40 297 -7 6 14 43 5 36 37 6 36 23 5 14 51 1 0 0 5 40 40 5 22 8 39 297 -6 5 59 44 5 21 34 6 21 26 4 59 46 2 0 0 5 25 16 5 22 0 38 296 -6 5 44 21 5 6 8 6 6 6 4 44 18 3 0 0 5 9 28 5 21 52 38 296 -5 5 28 36 4 50 19 5 50 22 4 28 27 4 0 0 4 53 18 5 21 44 37 296 -4 5 12 27 4 34 7 5 34 16 4 12 12 5 0 0 4 36 45 5 21 37 36 296 -3 4 55 56 4 17 31 5 17 47 3 55 34 6 0 0 4 19 48 5 21 29 35 296 -2 4 39 2 4 0 33 5 0 55 3 38 34 7 0 0 4 2 30 5 21 22 34 296 0 4 21 45 3 43 12 4 43 40 3 21 11 Uncertainty in time = +/- 4 secs Prediction of 2012 Nov 16.0 Data for the target star ------------------------ * name: TYC 1864-01023-1 * constellation : Gemini * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 06 07 29.6784 DE: +23 56 56.916 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .020, .031 ) * V mag [mag]: 10.5 * B mag [mag]: 11.7 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (43) Ariadne approx. diameter [km]: 66 approx. diameter ["]: .055 distance from Earth [AU]: 1.65500 * orbital information: orbit source: Preston date of fit: 2012 Nov 16 source of used astrometry: FASTT TMO MPC (via Astdys) number of used observations: 1273 number of rejected observations: 158 time covered by the observations: 1904 Nov 17 - 2012 Nov 08 1 sigma uncertainty ellipse (major, minor, PA): 0.012, 0.008, 94° remarks: * orbital elements for (43) Ariadne : Mean anomaly = 150.08464792 deg Arg. of pericenter = 16.23044840 deg Long. of node = 264.87204427 deg Inclination = 3.46956282 deg Eccentricity = 0.16771784 Semimajor axis = 2.20451357 AU Perihelion dist = 1.83477732 AU Mag: H = 7.80, G = 0.11 Epoch of elements : MJD 56251.23000000 TDT (2012 Nov 20.230) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Nov 20 43 Ariadne 5h 30.9m UT 10.5 6 7 29.678 23 56 56.92TYC 1864-01023-1 11.7 11.8 66 7.4 1.655 -1.938 -2.42 -50.4945 23.949 93.69 -19.78 5.5152 0.02112 -0.24140 -4.99537 -0.45589 -0.00319 -0.00001 2000 149.71427420121119.00000 16.230448264.872044 3.4695630.16771784 2.2045136 1.8347773 7.9 5.00.11 RATE 3.0111680 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.032 0.023 0 1.57 0.032 0 0 4-4 056247.0020121120_1023-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Nov 16, 08:23 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org