IOTA/IOTA-ES occultation update for (346) Hermentaria / TYC 1280-01141-1 event on 2009 Nov 02, 06:41 UT Visible from Summary ------- On 2009 Nov 02 UT, the 107 km diameter asteroid (346) Hermentaria will occult a 11.4 mag star in the constellation Orion for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 0.6 mag to 11.1 mag (the magnitude of the asteroid) for at most 15.3 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: 96 * date and approx. time of event: 2009 Nov 02, 06:29 - 2009 Nov 02, 06:57 UT * magnitude of target star: 11.4 * magnitude drop [mag]: 0.6 * estimated maximum duration [s]: 15.3 * Moon: 99 % sunlit, 42° distance * Sun: 146° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 108 * 1 sigma uncertainty interval [path widths]: +/- 0.41 * 1 sigma uncertainty interval [seconds]: +/- 6.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .041 +/- .036) * 1 sigma uncertainty ellipse (major, minor, PA): ( .041", .036", 86° ) * approx speed of asteroid's shadow [km/s]: 6.9488 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 1280-01141-1 by 346 Hermentaria on 2009 Nov 2 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 -161 0 0 - 5 13 7 6 57 17 1 74 -34 - 4 42 39 - 5 43 38 - 4 17 42 - 6 8 41 -160 0 0 - 4 56 27 6 57 16 2 74 -35 - 4 25 59 - 5 26 57 - 4 1 3 - 5 51 59 -159 0 0 - 4 39 51 6 57 16 3 74 -36 - 4 9 24 - 5 10 20 - 3 44 28 - 5 35 22 -158 0 0 - 4 23 20 6 57 15 4 74 -37 - 3 52 54 - 4 53 48 - 3 27 58 - 5 18 50 -157 0 0 - 4 6 54 6 57 13 5 74 -38 - 3 36 28 - 4 37 22 - 3 11 34 - 5 2 22 -156 0 0 - 3 50 33 6 57 12 6 74 -39 - 3 20 9 - 4 21 0 - 2 55 15 - 4 46 1 -155 0 0 - 3 34 19 6 57 10 7 74 -40 - 3 3 55 - 4 4 45 - 2 39 2 - 4 29 45 -154 0 0 - 3 18 11 6 57 8 8 74 -41 - 2 47 48 - 3 48 36 - 2 22 55 - 4 13 35 -153 0 0 - 3 2 9 6 57 6 9 74 -42 - 2 31 47 - 3 32 33 - 2 6 55 - 3 57 31 -152 0 0 - 2 46 14 6 57 3 10 74 -43 - 2 15 53 - 3 16 38 - 1 51 2 - 3 41 35 -151 0 0 - 2 30 26 6 57 0 11 74 -44 - 2 0 6 - 3 0 49 - 1 35 16 - 3 25 45 -150 0 0 - 2 14 46 6 56 57 12 74 -45 - 1 44 27 - 2 45 7 - 1 19 37 - 3 10 3 -149 0 0 - 1 59 13 6 56 53 13 74 -46 - 1 28 55 - 2 29 33 - 1 4 6 - 2 54 28 -148 0 0 - 1 43 48 6 56 49 14 74 -47 - 1 13 31 - 2 14 8 - 0 48 43 - 2 39 1 -147 0 0 - 1 28 31 6 56 45 15 74 -48 - 0 58 16 - 1 58 50 - 0 33 28 - 2 23 43 -146 0 0 - 1 13 23 6 56 41 16 73 -49 - 0 43 9 - 1 43 40 - 0 18 22 - 2 8 33 -145 0 0 - 0 58 24 6 56 36 17 73 -50 - 0 28 10 - 1 28 40 - 0 3 25 - 1 53 31 -144 0 0 - 0 43 33 6 56 31 18 73 -51 - 0 13 21 - 1 13 48 0 11 24 - 1 38 38 -143 0 0 - 0 28 52 6 56 26 19 73 -52 0 1 19 - 0 59 6 0 26 3 - 1 23 55 -142 0 0 - 0 14 20 6 56 21 20 73 -53 0 15 50 - 0 44 33 0 40 33 - 1 9 21 -141 0 0 0 0 2 6 56 15 21 73 -54 0 30 11 - 0 30 9 0 54 53 - 0 54 57 -140 0 0 0 14 14 6 56 9 22 73 -55 0 44 22 - 0 15 56 1 9 3 - 0 40 42 -139 0 0 0 28 17 6 56 3 23 73 -56 0 58 23 - 0 1 52 1 23 3 - 0 26 38 -138 0 0 0 42 8 6 55 56 24 73 -57 1 12 14 0 12 1 1 36 53 - 0 12 44 -137 0 0 0 55 50 6 55 50 25 73 -58 1 25 54 0 25 43 1 50 32 0 1 0 -136 0 0 1 9 20 6 55 43 26 73 -59 1 39 23 0 39 15 2 4 0 0 14 33 -135 0 0 1 22 40 6 55 36 27 73 -60 1 52 42 0 52 36 2 17 17 0 27 54 -134 0 0 1 35 48 6 55 28 28 73 -61 2 5 49 1 5 46 2 30 24 0 41 5 -133 0 0 1 48 46 6 55 21 29 73 -62 2 18 45 1 18 44 2 43 19 0 54 5 -132 0 0 2 1 31 6 55 13 30 73 -63 2 31 29 1 31 31 2 56 2 1 6 53 -131 0 0 2 14 6 6 55 5 31 73 -64 2 44 2 1 44 6 3 8 34 1 19 29 -130 0 0 2 26 28 6 54 56 32 73 -65 2 56 23 1 56 30 3 20 54 1 31 54 -129 0 0 2 38 38 6 54 48 33 73 -66 3 8 32 2 8 41 3 33 2 1 44 6 -128 0 0 2 50 36 6 54 39 34 73 -67 3 20 29 2 20 41 3 44 58 1 56 7 -127 0 0 3 2 22 6 54 30 35 73 -68 3 32 14 2 32 28 3 56 42 2 7 55 -126 0 0 3 13 56 6 54 21 36 73 -69 3 43 46 2 44 3 4 8 13 2 19 31 -125 0 0 3 25 17 6 54 12 37 73 -69 3 55 6 2 55 25 4 19 32 2 30 54 -124 0 0 3 36 25 6 54 2 38 73 -70 4 6 13 3 6 34 4 30 38 2 42 4 -123 0 0 3 47 20 6 53 52 39 73 -71 4 17 7 3 17 31 4 41 31 2 53 2 -122 0 0 3 58 3 6 53 42 40 73 -72 4 27 49 3 28 14 4 52 11 3 3 46 -121 0 0 4 8 32 6 53 32 41 73 -73 4 38 17 3 38 45 5 2 39 3 14 18 -120 0 0 4 18 48 6 53 22 42 73 -74 4 48 32 3 49 2 5 12 53 3 24 36 -119 0 0 4 28 51 6 53 11 43 73 -75 4 58 34 3 59 7 5 22 54 3 34 41 -118 0 0 4 38 41 6 53 1 44 73 -75 5 8 22 4 8 57 5 32 41 3 44 33 -117 0 0 4 48 17 6 52 50 45 73 -76 5 17 57 4 18 34 5 42 15 3 54 11 -116 0 0 4 57 39 6 52 39 45 73 -77 5 27 18 4 27 58 5 51 36 4 3 35 -115 0 0 5 6 48 6 52 28 46 73 -78 5 36 26 4 37 8 6 0 42 4 12 46 -114 0 0 5 15 43 6 52 16 47 73 -78 5 45 20 4 46 4 6 9 35 4 21 43 -113 0 0 5 24 24 6 52 5 48 73 -79 5 54 0 4 54 46 6 18 15 4 30 26 -112 0 0 5 32 51 6 51 53 49 73 -80 6 2 26 5 3 14 6 26 40 4 38 55 -111 0 0 5 41 4 6 51 42 50 72 -80 6 10 38 5 11 28 6 34 51 4 47 10 -110 0 0 5 49 3 6 51 30 51 72 -80 6 18 36 5 19 28 6 42 49 4 55 11 -109 0 0 5 56 48 6 51 17 52 72 -81 6 26 20 5 27 14 6 50 32 5 2 58 -108 0 0 6 4 19 6 51 5 53 72 -81 6 33 50 5 34 46 6 58 1 5 10 30 -107 0 0 6 11 35 6 50 53 54 72 -81 6 41 5 5 42 3 7 5 15 5 17 48 -106 0 0 6 18 37 6 50 40 55 72 -81 6 48 7 5 49 6 7 12 16 5 24 52 -105 0 0 6 25 25 6 50 28 56 72 -81 6 54 53 5 55 54 7 19 2 5 31 41 -104 0 0 6 31 58 6 50 15 57 72 -81 7 1 26 6 2 28 7 25 33 5 38 15 -103 0 0 6 38 17 6 50 2 58 71 -81 7 7 43 6 8 48 7 31 51 5 44 36 -102 0 0 6 44 21 6 49 49 59 71 -81 7 13 47 6 14 53 7 37 53 5 50 41 -101 0 0 6 50 10 6 49 36 60 71 -80 7 19 35 6 20 43 7 43 41 5 56 32 -100 0 0 6 55 45 6 49 23 60 71 -80 7 25 9 6 26 18 7 49 15 6 2 8 - 99 0 0 7 1 5 6 49 10 61 70 -79 7 30 29 6 31 39 7 54 34 6 7 29 - 98 0 0 7 6 10 6 48 56 62 70 -79 7 35 33 6 36 45 7 59 38 6 12 36 - 97 0 0 7 11 1 6 48 43 63 70 -78 7 40 23 6 41 36 8 4 27 6 17 28 - 96 0 0 7 15 37 6 48 29 64 69 -77 7 44 59 6 46 13 8 9 2 6 22 4 - 95 0 0 7 19 58 6 48 16 65 69 -77 7 49 19 6 50 34 8 13 22 6 26 26 - 94 0 0 7 24 4 6 48 2 66 68 -76 7 53 24 6 54 41 8 17 27 6 30 34 - 93 0 0 7 27 55 6 47 48 67 68 -75 7 57 15 6 58 33 8 21 17 6 34 26 - 92 0 0 7 31 31 6 47 34 68 67 -74 8 0 51 7 2 9 8 24 53 6 38 3 - 91 0 0 7 34 53 6 47 20 68 66 -74 8 4 12 7 5 31 8 28 13 6 41 25 - 90 0 0 7 37 59 6 47 6 69 66 -73 8 7 18 7 8 38 8 31 19 6 44 32 - 89 0 0 7 40 50 6 46 52 70 65 -72 8 10 9 7 11 30 8 34 9 6 47 24 - 88 0 0 7 43 27 6 46 37 71 64 -71 8 12 45 7 14 7 8 36 45 6 50 2 - 87 0 0 7 45 48 6 46 23 72 63 -70 8 15 6 7 16 28 8 39 6 6 52 24 - 86 0 0 7 47 55 6 46 9 73 62 -69 8 17 12 7 18 35 8 41 12 6 54 31 - 85 0 0 7 49 46 6 45 54 74 61 -69 8 19 4 7 20 27 8 43 3 6 56 23 - 84 0 0 7 51 23 6 45 40 74 59 -68 8 20 40 7 22 4 8 44 39 6 57 59 - 83 0 0 7 52 44 6 45 25 75 57 -67 8 22 1 7 23 25 8 46 0 6 59 21 - 82 0 0 7 53 51 6 45 11 76 56 -66 8 23 7 7 24 32 8 47 6 7 0 28 - 81 0 0 7 54 42 6 44 56 77 54 -65 8 23 59 7 25 23 8 47 57 7 1 19 - 80 0 0 7 55 18 6 44 41 78 51 -64 8 24 35 7 26 0 8 48 34 7 1 56 - 79 0 0 7 55 40 6 44 27 78 49 -63 8 24 56 7 26 21 8 48 55 7 2 17 - 78 0 0 7 55 46 6 44 12 79 46 -63 8 25 2 7 26 27 8 49 1 7 2 24 - 77 0 0 7 55 37 6 43 57 80 42 -62 8 24 53 7 26 18 8 48 52 7 2 15 - 76 0 0 7 55 13 6 43 42 80 38 -61 8 24 30 7 25 55 8 48 29 7 1 51 - 75 0 0 7 54 35 6 43 28 81 34 -60 8 23 51 7 25 16 8 47 50 7 1 12 - 74 0 0 7 53 41 6 43 13 81 29 -59 8 22 57 7 24 22 8 46 56 7 0 18 - 73 0 0 7 52 32 6 42 58 82 24 -58 8 21 49 7 23 13 8 45 48 6 59 9 - 72 0 0 7 51 8 6 42 43 82 18 -57 8 20 25 7 21 49 8 44 25 6 57 45 - 71 0 0 7 49 30 6 42 28 82 11 -56 8 18 47 7 20 10 8 42 46 6 56 6 - 70 0 0 7 47 36 6 42 13 82 5 -55 8 16 54 7 18 17 8 40 53 6 54 12 - 69 0 0 7 45 28 6 41 58 82 358 -54 8 14 45 7 16 8 8 38 45 6 52 3 - 68 0 0 7 43 4 6 41 44 82 352 -54 8 12 22 7 13 44 8 36 22 6 49 39 - 67 0 0 7 40 26 6 41 29 82 345 -53 8 9 44 7 11 6 8 33 45 6 47 0 - 66 0 0 7 37 33 6 41 14 82 339 -52 8 6 52 7 8 12 8 30 52 6 44 7 - 65 0 0 7 34 25 6 40 59 81 334 -51 8 3 44 7 5 4 8 27 45 6 40 58 - 64 0 0 7 31 2 6 40 44 81 329 -50 8 0 22 7 1 41 8 24 23 6 37 35 - 63 0 0 7 27 25 6 40 29 80 325 -49 7 56 45 6 58 3 8 20 47 6 33 56 - 62 0 0 7 23 33 6 40 14 79 321 -48 7 52 53 6 54 10 8 16 56 6 30 3 - 61 0 0 7 19 26 6 39 59 79 318 -47 7 48 47 6 50 3 8 12 50 6 25 55 - 60 0 0 7 15 5 6 39 45 78 315 -46 7 44 26 6 45 41 8 8 29 6 21 33 - 59 0 0 7 10 28 6 39 30 77 312 -45 7 39 51 6 41 4 8 3 54 6 16 56 - 58 0 0 7 5 38 6 39 15 77 310 -44 7 35 1 6 36 13 7 59 5 6 12 4 - 57 0 0 7 0 33 6 39 1 76 308 -43 7 29 56 6 31 7 7 54 1 6 6 58 - 56 0 0 6 55 13 6 38 46 75 306 -42 7 24 37 6 25 47 7 48 42 6 1 37 - 55 0 0 6 49 39 6 38 31 74 305 -42 7 19 4 6 20 12 7 43 10 5 56 2 - 54 0 0 6 43 51 6 38 17 73 303 -41 7 13 16 6 14 23 7 37 22 5 50 12 - 53 0 0 6 37 48 6 38 2 73 302 -40 7 7 14 6 8 20 7 31 21 5 44 8 - 52 0 0 6 31 31 6 37 48 72 301 -39 7 0 58 6 2 2 7 25 5 5 37 49 - 51 0 0 6 25 0 6 37 33 71 300 -38 6 54 28 5 55 30 7 18 36 5 31 17 - 50 0 0 6 18 15 6 37 19 70 299 -37 6 47 43 5 48 44 7 11 52 5 24 30 - 49 0 0 6 11 15 6 37 5 69 298 -36 6 40 45 5 41 43 7 4 54 5 17 29 - 48 0 0 6 4 2 6 36 51 68 297 -35 6 33 32 5 34 29 6 57 42 5 10 14 - 47 0 0 5 56 34 6 36 36 67 297 -34 6 26 6 5 27 1 6 50 17 5 2 45 - 46 0 0 5 48 53 6 36 22 66 296 -33 6 18 25 5 19 19 6 42 37 4 55 2 - 45 0 0 5 40 58 6 36 8 66 296 -32 6 10 31 5 11 23 6 34 44 4 47 5 - 44 0 0 5 32 49 6 35 54 65 295 -31 6 2 24 5 3 13 6 26 37 4 38 55 - 43 0 0 5 24 27 6 35 41 64 295 -30 5 54 2 4 54 50 6 18 16 4 30 31 - 42 0 0 5 15 51 6 35 27 63 294 -29 5 45 27 4 46 13 6 9 42 4 21 53 - 41 0 0 5 7 2 6 35 13 62 294 -28 5 36 39 4 37 23 6 0 55 4 13 2 - 40 0 0 4 57 59 6 35 0 61 293 -27 5 27 37 4 28 19 5 51 54 4 3 57 - 39 0 0 4 48 43 6 34 46 60 293 -27 5 18 22 4 19 2 5 42 40 3 54 40 - 38 0 0 4 39 14 6 34 33 59 293 -26 5 8 54 4 9 32 5 33 12 3 45 8 - 37 0 0 4 29 32 6 34 20 58 293 -25 4 59 13 3 59 49 5 23 32 3 35 24 - 36 0 0 4 19 37 6 34 7 57 292 -24 4 49 19 3 49 52 5 13 39 3 25 27 - 35 0 0 4 9 29 6 33 54 56 292 -23 4 39 12 3 39 43 5 3 33 3 15 17 - 34 0 0 3 59 8 6 33 41 55 292 -22 4 28 53 3 29 21 4 53 14 3 4 54 - 33 0 0 3 48 35 6 33 28 54 292 -21 4 18 20 3 18 47 4 42 43 2 54 19 - 32 0 0 3 37 49 6 33 16 53 291 -20 4 7 36 3 8 0 4 31 59 2 43 31 - 31 0 0 3 26 51 6 33 3 53 291 -19 3 56 39 2 57 1 4 21 3 2 32 31 - 30 0 0 3 15 40 6 32 51 52 291 -18 3 45 29 2 45 49 4 9 55 2 21 18 - 29 0 0 3 4 18 6 32 39 51 291 -17 3 34 8 2 34 25 3 58 34 2 9 54 - 28 0 0 2 52 43 6 32 27 50 291 -16 3 22 35 2 22 50 3 47 2 1 58 17 - 27 0 0 2 40 57 6 32 15 49 291 -15 3 10 49 2 11 2 3 35 18 1 46 28 - 26 0 0 2 28 59 6 32 3 48 291 -14 2 58 53 1 59 3 3 23 22 1 34 28 - 25 0 0 2 16 49 6 31 52 47 290 -13 2 46 44 1 46 52 3 11 15 1 22 17 - 24 0 0 2 4 29 6 31 40 46 290 -12 2 34 25 1 34 30 2 58 56 1 9 54 - 23 0 0 1 51 56 6 31 29 45 290 -11 2 21 54 1 21 57 2 46 26 0 57 19 - 22 0 0 1 39 13 6 31 18 44 290 -10 2 9 12 1 9 13 2 33 45 0 44 34 - 21 0 0 1 26 19 6 31 7 43 290 -9 1 56 19 0 56 17 2 20 53 0 31 38 - 20 0 0 1 13 15 6 30 56 42 290 -8 1 43 16 0 43 12 2 7 51 0 18 31 - 19 0 0 1 0 0 6 30 46 41 290 -7 1 30 2 0 29 55 1 54 37 0 5 14 - 18 0 0 0 46 34 6 30 36 40 290 -6 1 16 37 0 16 29 1 41 14 - 0 8 14 - 17 0 0 0 32 59 6 30 25 39 290 -5 1 3 3 0 2 52 1 27 41 - 0 21 51 - 16 0 0 0 19 13 6 30 15 38 290 -4 0 49 19 - 0 10 55 1 13 57 - 0 35 39 - 15 0 0 0 5 18 6 30 6 37 290 -3 0 35 24 - 0 24 51 1 0 4 - 0 49 36 - 14 0 0 - 0 8 47 6 29 56 36 289 -2 0 21 21 - 0 38 57 0 46 1 - 1 3 43 - 13 0 0 - 0 23 1 6 29 47 35 289 -1 0 7 8 - 0 53 12 0 31 49 - 1 17 59 - 12 0 0 - 0 37 24 6 29 38 34 289 0 - 0 7 14 - 1 7 36 0 17 28 - 1 32 24 Uncertainty in time = +/- 7 secs [Prediction of 2008 Mar 20.0] Data for the target star ------------------------ * name: TYC 1280-01141-1 * constellation : Orion * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 04 51 01.8922 DE: +15 28 50.900 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .035, .034 ) * V mag [mag]: 11.4 * B mag [mag]: 12.3 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (346) Hermentaria approx. diameter [km]: 107 approx. diameter ["]: .088 distance from Earth [AU]: 1.68500 * orbital information: orbit source: Preston date of fit: 2008 Mar 20 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 763 number of rejected observations: 90 time covered by the observations: 1900 Jun 21 - 2007 Sep 21 1 sigma uncertainty ellipse (major, minor, PA): 0.021, 0.012, 73° remarks: * orbital elements for (346) Hermentaria : Mean anomaly = 31.59996381 deg Arg. of pericenter = 290.23814275 deg Long. of node = 92.13466477 deg Inclination = 8.75890485 deg Eccentricity = 0.09961409 Semimajor axis = 2.79564489 AU Perihelion dist = 2.51715926 AU Mag: H = 7.23, G = 0.15 Epoch of elements : MJD 55137.27900000 TDT (2009 Nov 02.279) ------ occelmnt file for Occult BEGIN ----------------------------------- 2009 Nov 2 346 Hermentaria 6h 42.1m UT 11.4 4 51 1.892 15 28 50.90TYC 1280-01141-1 12.4 11.1 107 15.3 1.685 -1.417 0.79 -69.4476 15.480 75.37 -14.81 6.7019 -0.00460 -0.13523 -3.91913 0.15196 -0.00320 0.00020 2000 30.06516020091026.00000290.238143 92.134665 8.7589050.09961409 2.7956449 2.5171593 7.1 5.00.15 RATE 2.1085370 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.041 0.036 86 1.41 0.036 0 54545.5020091102_1141-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Mar 20, 16:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org