IOTA/IOTA-ES occultation update for (934) Thuringia / TYC 2947-00224-1 event on 2012 Dec 20, 23:27 UT Visible from India, Arabia, Africa Summary ------- On 2012 Dec 20 UT, the 58 km diameter asteroid (934) Thuringia will occult a 10.1 mag star in the constellation Auriga for observers along a path across India, Arabia, Africa. In the case of an occultation, the combined light of the asteroid and the star will drop by 3.5 mag to 13.6 mag (the magnitude of the asteroid) for at most 5.6 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: 80 * date and approx. time of event: 2012 Dec 20, 23:17 - 2012 Dec 20, 23:36 UT * geocentric midpoint of event [JD]: 2456282.47701667 * magnitude of target star: 10.1 * magnitude drop [mag]: 3.5 * estimated maximum duration [s]: 5.6 * Moon: 57 % sunlit, 94° distance * Sun: 158° distance * rough path description: India, Arabia, Africa Additional comments ------------------- 1.5" double star The occultation path -------------------- * approximate projected width [km]: 60 * 1 sigma uncertainty interval [path widths]: +/- 0.68 * 1 sigma uncertainty interval [seconds]: +/- 3.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .045 +/- .037) * 1 sigma uncertainty ellipse (major, minor, PA): ( .045", .037", 99° ) * approx speed of asteroid's shadow [km/s]: 10.3908 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2947-00224-1 by 934 Thuringia on 2012 Dec 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 - 53 0 0 -15 6 37 23 36 45 1 48 -21 -14 44 30 -15 28 47 -14 14 31 -15 59 2 - 52 0 0 -14 14 17 23 36 44 2 48 -23 -13 52 13 -14 36 24 -13 22 18 -15 6 35 - 51 0 0 -13 22 2 23 36 44 3 47 -24 -13 0 2 -13 44 6 -12 30 12 -14 14 13 - 50 0 0 -12 29 56 23 36 43 5 47 -25 -12 7 59 -12 51 56 -11 38 14 -13 21 57 - 49 0 0 -11 38 0 23 36 41 6 47 -26 -11 16 7 -11 59 56 -10 46 27 -12 29 52 - 48 0 0 -10 46 17 23 36 40 7 47 -28 -10 24 28 -11 8 8 - 9 54 54 -11 37 58 - 47 0 0 - 9 54 48 23 36 38 9 47 -29 - 9 33 4 -10 16 36 - 9 3 36 -10 46 19 - 46 0 0 - 9 3 37 23 36 35 10 46 -30 - 8 41 57 - 9 25 20 - 8 12 35 - 9 54 57 - 45 0 0 - 8 12 45 23 36 33 11 46 -32 - 7 51 10 - 8 34 23 - 7 21 55 - 9 3 53 - 44 0 0 - 7 22 14 23 36 30 12 46 -33 - 7 0 45 - 7 43 47 - 6 31 36 - 8 13 10 - 43 0 0 - 6 32 7 23 36 27 14 46 -34 - 6 10 43 - 6 53 34 - 5 41 42 - 7 22 50 - 42 0 0 - 5 42 25 23 36 23 15 46 -35 - 5 21 6 - 6 3 47 - 4 52 12 - 6 32 55 - 41 0 0 - 4 53 10 23 36 19 16 46 -37 - 4 31 57 - 5 14 26 - 4 3 10 - 5 43 26 - 40 0 0 - 4 4 23 23 36 15 18 46 -38 - 3 43 16 - 4 25 34 - 3 14 37 - 4 54 26 - 39 0 0 - 3 16 7 23 36 11 19 45 -39 - 2 55 6 - 3 37 12 - 2 26 35 - 4 5 56 - 38 0 0 - 2 28 23 23 36 6 20 45 -40 - 2 7 27 - 2 49 21 - 1 39 5 - 3 17 57 - 37 0 0 - 1 41 12 23 36 1 21 45 -42 - 1 20 22 - 2 2 4 - 0 52 8 - 2 30 32 - 36 0 0 - 0 54 35 23 35 56 23 45 -43 - 0 33 52 - 1 15 21 - 0 5 46 - 1 43 40 - 35 0 0 - 0 8 34 23 35 50 24 45 -44 0 12 3 - 0 29 14 0 40 1 - 0 57 24 - 34 0 0 0 36 50 23 35 45 25 45 -45 0 57 21 0 16 17 1 25 10 - 0 11 45 - 33 0 0 1 21 36 23 35 39 26 45 -47 1 42 1 1 1 9 2 9 42 0 33 16 - 32 0 0 2 5 44 23 35 33 27 45 -48 2 26 2 1 45 23 2 53 34 1 17 39 - 31 0 0 2 49 12 23 35 26 29 45 -49 3 9 23 2 28 57 3 36 47 2 1 21 - 30 0 0 3 31 59 23 35 20 30 45 -50 3 52 4 3 11 51 4 19 19 2 44 24 - 29 0 0 4 14 5 23 35 13 31 45 -51 4 34 3 3 54 3 5 1 10 3 26 45 - 28 0 0 4 55 29 23 35 6 32 45 -53 5 15 21 4 35 34 5 42 19 4 8 24 - 27 0 0 5 36 10 23 34 59 33 45 -54 5 55 56 5 16 22 6 22 46 4 49 21 - 26 0 0 6 16 9 23 34 52 34 45 -55 6 35 49 5 56 27 7 2 30 5 29 35 - 25 0 0 6 55 24 23 34 45 36 45 -56 7 14 58 6 35 48 7 41 30 6 9 5 - 24 0 0 7 33 56 23 34 37 37 45 -57 7 53 24 7 14 26 8 19 48 6 47 52 - 23 0 0 8 11 44 23 34 29 38 44 -58 8 31 5 7 52 20 8 57 21 7 25 54 - 22 0 0 8 48 47 23 34 21 39 44 -60 9 8 2 8 29 30 9 34 10 8 3 12 - 21 0 0 9 25 6 23 34 13 40 44 -61 9 44 15 9 5 55 10 10 15 8 39 46 - 20 0 0 10 0 41 23 34 5 41 44 -62 10 19 44 9 41 36 10 45 35 9 15 35 - 19 0 0 10 35 31 23 33 57 42 44 -63 10 54 28 10 16 31 11 20 11 9 50 38 - 18 0 0 11 9 36 23 33 49 43 44 -64 11 28 27 10 50 42 11 54 2 10 24 57 - 17 0 0 11 42 56 23 33 40 44 44 -65 12 1 41 11 24 8 12 27 9 10 58 31 - 16 0 0 12 15 31 23 33 32 45 44 -66 12 34 11 11 56 49 12 59 31 11 31 20 - 15 0 0 12 47 22 23 33 23 46 44 -67 13 5 56 12 28 46 13 31 8 12 3 25 - 14 0 0 13 18 28 23 33 14 47 44 -68 13 36 57 12 59 58 14 2 2 12 34 44 - 13 0 0 13 48 50 23 33 6 48 44 -69 14 7 13 13 30 25 14 32 11 13 5 18 - 12 0 0 14 18 27 23 32 57 49 43 -70 14 36 45 14 0 7 15 1 35 13 35 8 - 11 0 0 14 47 20 23 32 48 50 43 -71 15 5 33 14 29 6 15 30 16 14 4 14 - 10 0 0 15 15 29 23 32 39 51 43 -72 15 33 37 14 57 20 15 58 13 14 32 35 - 9 0 0 15 42 55 23 32 30 52 43 -73 16 0 57 15 24 50 16 25 27 15 0 12 - 8 0 0 16 9 36 23 32 21 53 43 -75 16 27 34 15 51 37 16 51 57 15 27 5 - 7 0 0 16 35 34 23 32 11 54 42 -76 16 53 27 16 17 40 17 17 44 15 53 15 - 6 0 0 17 0 49 23 32 2 55 42 -77 17 18 38 16 42 59 17 42 48 16 18 41 - 5 0 0 17 25 21 23 31 53 56 42 -78 17 43 5 17 7 36 18 7 9 16 43 24 - 4 0 0 17 49 11 23 31 44 57 41 -78 18 6 50 17 31 30 18 30 48 17 7 24 - 3 0 0 18 12 18 23 31 34 58 41 -79 18 29 53 17 54 41 18 53 45 17 30 42 - 2 0 0 18 34 43 23 31 25 59 40 -80 18 52 13 18 17 10 19 16 0 17 53 17 - 1 0 0 18 56 26 23 31 16 60 40 -81 19 13 52 18 38 58 19 37 33 18 15 10 0 0 0 19 17 28 23 31 6 60 40 -82 19 34 50 19 0 3 19 58 25 18 36 21 1 0 0 19 37 48 23 30 57 61 39 -83 19 55 6 19 20 28 20 18 37 18 56 50 2 0 0 19 57 27 23 30 48 62 38 -84 20 14 42 19 40 11 20 38 7 19 16 38 3 0 0 20 16 26 23 30 38 63 38 -85 20 33 37 19 59 13 20 56 57 19 35 46 4 0 0 20 34 44 23 30 29 64 37 -86 20 51 52 20 17 35 21 15 7 19 54 12 5 0 0 20 52 22 23 30 19 64 36 -86 21 9 26 20 35 16 21 32 37 20 11 58 6 0 0 21 9 20 23 30 10 65 35 -87 21 26 21 20 52 18 21 49 27 20 29 4 7 0 0 21 25 39 23 30 0 66 34 -87 21 42 37 21 8 39 22 5 39 20 45 31 8 0 0 21 41 18 23 29 51 67 33 -87 21 58 13 21 24 22 22 21 11 21 1 17 9 0 0 21 56 18 23 29 41 67 32 -87 22 13 10 21 39 25 22 36 4 21 16 24 10 0 0 22 10 39 23 29 32 68 31 -87 22 27 29 21 53 49 22 50 19 21 30 52 11 0 0 22 24 22 23 29 22 69 30 -86 22 41 9 22 7 34 23 3 55 21 44 41 12 0 0 22 37 27 23 29 13 69 28 -85 22 54 11 22 20 41 23 16 54 21 57 52 13 0 0 22 49 53 23 29 3 70 27 -84 23 6 34 22 33 10 23 29 14 22 10 24 14 0 0 23 1 42 23 28 54 70 25 -84 23 18 21 22 45 1 23 40 57 22 22 18 15 0 0 23 12 52 23 28 44 71 24 -83 23 29 29 22 56 14 23 52 3 22 33 34 16 0 0 23 23 26 23 28 35 71 22 -82 23 40 1 23 6 50 24 2 31 22 44 13 17 0 0 23 33 22 23 28 25 72 20 -81 23 49 55 23 16 48 24 12 23 22 54 13 18 0 0 23 42 41 23 28 16 72 18 -80 23 59 12 23 26 9 24 21 37 23 3 37 19 0 0 23 51 23 23 28 6 73 16 -79 24 7 52 23 34 53 24 30 16 23 12 23 20 0 0 23 59 29 23 27 57 73 13 -78 24 15 56 23 43 0 24 38 17 23 20 32 21 0 0 24 6 57 23 27 47 73 11 -78 24 23 24 23 50 30 24 45 43 23 28 5 22 0 0 24 13 50 23 27 38 74 8 -77 24 30 15 23 57 24 24 52 32 23 35 0 23 0 0 24 20 6 23 27 29 74 6 -76 24 36 29 24 3 41 24 58 45 23 41 19 24 0 0 24 25 46 23 27 19 74 3 -75 24 42 8 24 9 22 25 4 22 23 47 2 25 0 0 24 30 50 23 27 10 74 0 -74 24 47 11 24 14 27 25 9 24 23 52 8 26 0 0 24 35 18 23 27 0 74 358 -73 24 51 38 24 18 56 25 13 50 23 56 38 27 0 0 24 39 10 23 26 51 74 355 -72 24 55 30 24 22 49 25 17 40 24 0 32 28 0 0 24 42 26 23 26 42 74 352 -71 24 58 45 24 26 6 25 20 55 24 3 50 29 0 0 24 45 7 23 26 32 74 350 -71 25 1 25 24 28 47 25 23 34 24 6 32 30 0 0 24 47 11 23 26 23 74 347 -70 25 3 29 24 30 52 25 25 38 24 8 38 31 0 0 24 48 40 23 26 14 74 344 -69 25 4 58 24 32 21 25 27 6 24 10 7 32 0 0 24 49 34 23 26 4 73 342 -68 25 5 52 24 33 15 25 27 59 24 11 1 33 0 0 24 49 52 23 25 55 73 340 -67 25 6 9 24 33 33 25 28 17 24 11 19 34 0 0 24 49 34 23 25 46 73 337 -66 25 5 52 24 33 15 25 27 59 24 11 1 35 0 0 24 48 41 23 25 36 73 335 -65 25 4 58 24 32 21 25 27 6 24 10 7 36 0 0 24 47 12 23 25 27 72 333 -65 25 3 30 24 30 52 25 25 38 24 8 38 37 0 0 24 45 7 23 25 18 72 331 -64 25 1 25 24 28 47 25 23 34 24 6 32 38 0 0 24 42 26 23 25 9 71 329 -63 24 58 45 24 26 6 25 20 55 24 3 50 39 0 0 24 39 10 23 24 59 71 328 -62 24 55 30 24 22 49 25 17 40 24 0 32 40 0 0 24 35 18 23 24 50 70 326 -61 24 51 38 24 18 56 25 13 50 23 56 38 41 0 0 24 30 49 23 24 41 70 325 -60 24 47 11 24 14 27 25 9 24 23 52 8 42 0 0 24 25 45 23 24 32 69 323 -59 24 42 8 24 9 21 25 4 22 23 47 1 43 0 0 24 20 5 23 24 23 68 322 -58 24 36 28 24 3 40 24 58 44 23 41 18 44 0 0 24 13 48 23 24 14 68 321 -58 24 30 13 23 57 22 24 52 31 23 34 58 45 0 0 24 6 55 23 24 4 67 320 -57 24 23 21 23 50 27 24 45 41 23 28 1 46 0 0 23 59 25 23 23 55 67 319 -56 24 15 53 23 42 56 24 38 14 23 20 28 47 0 0 23 51 18 23 23 46 66 318 -55 24 7 48 23 34 47 24 30 12 23 12 17 48 0 0 23 42 35 23 23 37 65 317 -54 23 59 6 23 26 2 24 21 32 23 3 30 49 0 0 23 33 14 23 23 28 64 316 -53 23 49 47 23 16 40 24 12 16 22 54 5 50 0 0 23 23 16 23 23 19 64 316 -52 23 39 52 23 6 40 24 2 23 22 44 2 51 0 0 23 12 41 23 23 10 63 315 -51 23 29 18 22 56 2 23 51 53 22 33 21 52 0 0 23 1 28 23 23 1 62 314 -50 23 18 7 22 44 47 23 40 45 22 22 3 53 0 0 22 49 37 23 22 52 61 314 -49 23 6 19 22 32 53 23 28 59 22 10 6 54 0 0 22 37 8 23 22 43 61 313 -49 22 53 52 22 20 22 23 16 36 21 57 31 55 0 0 22 24 0 23 22 35 60 313 -48 22 40 47 22 7 11 23 3 34 21 44 17 56 0 0 22 10 14 23 22 26 59 313 -47 22 27 3 21 53 22 22 49 55 21 30 24 57 0 0 21 55 48 23 22 17 58 312 -46 22 12 41 21 38 54 22 35 36 21 15 52 58 0 0 21 40 44 23 22 8 57 312 -45 21 57 40 21 23 47 22 20 39 21 0 41 59 0 0 21 25 0 23 22 0 57 312 -44 21 41 59 21 8 0 22 5 2 20 44 49 60 0 0 21 8 36 23 21 51 56 311 -43 21 25 38 20 51 33 21 48 46 20 28 18 61 0 0 20 51 33 23 21 42 55 311 -42 21 8 38 20 34 26 21 31 50 20 11 6 62 0 0 20 33 49 23 21 34 54 311 -41 20 50 58 20 16 38 21 14 14 19 53 14 63 0 0 20 15 24 23 21 25 53 311 -40 20 32 36 19 58 10 20 55 58 19 34 41 64 0 0 19 56 18 23 21 17 52 311 -39 20 13 35 19 39 1 20 37 1 19 15 26 65 0 0 19 36 32 23 21 8 51 311 -38 19 53 52 19 19 10 20 17 24 18 55 30 66 0 0 19 16 3 23 21 0 50 311 -37 19 33 27 18 58 37 19 57 5 18 34 52 67 0 0 18 54 53 23 20 51 49 311 -36 19 12 21 18 37 23 19 36 4 18 13 32 68 0 0 18 33 0 23 20 43 49 310 -35 18 50 33 18 15 26 19 14 21 17 51 30 69 0 0 18 10 26 23 20 35 48 310 -34 18 28 2 17 52 47 18 51 57 17 28 45 70 0 0 17 47 8 23 20 27 47 310 -33 18 4 49 17 29 25 18 28 49 17 5 17 71 0 0 17 23 7 23 20 19 46 310 -32 17 40 53 17 5 20 18 4 59 16 41 5 72 0 0 16 58 23 23 20 11 45 310 -31 17 16 13 16 40 31 17 40 26 16 16 10 73 0 0 16 32 55 23 20 3 44 310 -30 16 50 50 16 14 58 17 15 10 15 50 30 74 0 0 16 6 43 23 19 55 43 310 -29 16 24 44 15 48 41 16 49 10 15 24 7 75 0 0 15 39 48 23 19 47 42 310 -28 15 57 53 15 21 40 16 22 26 14 56 59 76 0 0 15 12 7 23 19 40 41 310 -27 15 30 17 14 53 55 15 54 57 14 29 6 77 0 0 14 43 42 23 19 32 40 310 -26 15 1 58 14 25 24 15 26 45 14 0 29 78 0 0 14 14 32 23 19 25 39 311 -25 14 32 53 13 56 9 14 57 47 13 31 6 79 0 0 13 44 37 23 19 17 38 311 -24 14 3 3 13 26 8 14 28 5 13 0 58 80 0 0 13 13 56 23 19 10 37 311 -23 13 32 28 12 55 22 13 57 37 12 30 4 81 0 0 12 42 30 23 19 3 36 311 -22 13 1 8 12 23 51 13 26 25 11 58 24 82 0 0 12 10 19 23 18 56 34 311 -21 12 29 2 11 51 33 12 54 27 11 25 59 83 0 0 11 37 21 23 18 49 33 311 -20 11 56 11 11 18 30 12 21 43 10 52 48 84 0 0 11 3 38 23 18 43 32 311 -19 11 22 34 10 44 41 11 48 14 10 18 50 85 0 0 10 29 9 23 18 36 31 311 -18 10 48 11 10 10 6 11 13 59 9 44 7 86 0 0 9 53 55 23 18 30 30 311 -17 10 13 2 9 34 45 10 38 59 9 8 38 87 0 0 9 17 54 23 18 24 29 311 -15 9 37 8 8 58 38 10 3 13 8 32 22 88 0 0 8 41 8 23 18 17 28 311 -14 9 0 28 8 21 45 9 26 42 7 55 21 89 0 0 8 3 36 23 18 12 27 311 -13 8 23 2 7 44 7 8 49 25 7 17 34 90 0 0 7 25 19 23 18 6 26 311 -12 7 44 51 7 5 44 8 11 22 6 39 2 91 0 0 6 46 16 23 18 0 24 311 -11 7 5 56 6 26 35 7 32 35 5 59 44 92 0 0 6 6 29 23 17 55 23 311 -10 6 26 15 5 46 41 6 53 3 5 19 41 93 0 0 5 25 58 23 17 50 22 311 -9 5 45 50 5 6 3 6 12 47 4 38 54 94 0 0 4 44 42 23 17 45 21 311 -7 5 4 41 4 24 41 5 31 47 3 57 23 95 0 0 4 2 43 23 17 41 20 311 -6 4 22 48 3 42 35 4 50 3 3 15 8 96 0 0 3 20 1 23 17 36 19 311 -5 3 40 13 2 59 46 4 7 37 2 32 10 97 0 0 2 36 37 23 17 32 17 311 -4 2 56 55 2 16 15 3 24 28 1 48 30 98 0 0 1 52 31 23 17 28 16 311 -3 2 12 56 1 32 3 2 40 37 1 4 9 99 0 0 1 7 44 23 17 24 15 311 -2 1 28 16 0 47 10 1 56 6 0 19 6 100 0 0 0 22 18 23 17 21 14 311 0 0 42 56 0 1 37 1 10 55 - 0 26 35 Uncertainty in time = +/- 5 secs Prediction of 2012 Dec 17.0 Data for the target star ------------------------ * name: TYC 2947-00224-1 * constellation : Auriga * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 07 06 40.1564 DE: +40 09 38.904 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .034, .033 ) * V mag [mag]: 10.1 * B mag [mag]: 11.0 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (934) Thuringia approx. diameter [km]: 58 approx. diameter ["]: .055 distance from Earth [AU]: 1.46600 * orbital information: orbit source: Preston date of fit: 2012 Dec 16 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 889 number of rejected observations: 34 time covered by the observations: 1920 Sep 02 - 2012 Dec 12 1 sigma uncertainty ellipse (major, minor, PA): 0.031, 0.017, 110° remarks: * orbital elements for (934) Thuringia : Mean anomaly = 45.02985823 deg Arg. of pericenter = 64.62216458 deg Long. of node = 325.52881610 deg Inclination = 14.06942750 deg Eccentricity = 0.21934857 Semimajor axis = 2.74801817 AU Perihelion dist = 2.14524431 AU Mag: H = 9.97, G = 0.15 Epoch of elements : MJD 56281.97700000 TDT (2012 Dec 20.977) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Dec 20 934 Thuringia 23h 26.9m UT 10.1 7 6 40.156 40 9 38.90TYC 2947-00224-1 11.1 13.6 58 5.6 1.466 -3.059 -3.00 24.9961 40.161 -172.21 -23.43 23.4484 0.02253 -0.26944 -5.84370 -0.49739 -0.00156 -0.00152 2000 44.60211720121219.00000 64.622165325.528816 14.0694280.21934857 2.7480182 2.145244310.3 5.00.15 RATE 2.1635880 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.045 0.037 99 1.68 0.037 0 0 4 4 056278.0020121220_0224-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Dec 16, 19:01 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org