IOTA/IOTA-ES occultation update for (73) Klytia / UCAC2 40818208 event on 2008 Oct 11, 18:05 UT Visible from Japan, China, Hong Kong, SE Asia Summary ------- On 2008 Oct 11 UT, the 44 km diameter asteroid (73) Klytia will occult a 11.9 mag star in the constellation Taurus for observers along a path across Japan, China, Hong Kong, SE Asia. In the case of an occultation, the combined light of the asteroid and the star will drop by 1.9 mag to 13.6 mag (the magnitude of the asteroid) for at most 8.1 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: 60 * date and approx. time of event: 2008 Oct 11, 17:47 - 2008 Oct 11, 18:14 UT * magnitude of target star: 11.9 * magnitude drop [mag]: 1.9 * estimated maximum duration [s]: 8.1 * Moon: 88 % sunlit, 106° distance * Sun: 114° distance * rough path description: Japan, China, Hong Kong, SE Asia The occultation path -------------------- * approximate projected width [km]: 45 * 1 sigma uncertainty interval [path widths]: +/- 1.03 * 1 sigma uncertainty interval [seconds]: +/- 8.9 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .038 +/- .032) * 1 sigma uncertainty ellipse (major, minor, PA): ( .038", .032", 89° ) * approx speed of asteroid's shadow [km/s]: 5.5135 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC2 40818208 by 73 Klytia on 2008 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 ' " Latitude Latitude Latitude Latitude 69 0 0 - 3 38 6 17 47 1 0 64 -66 .. .. .. - 3 24 23 .. .. .. - 2 56 6 70 0 0 - 3 8 30 17 47 2 1 64 -68 - 3 22 14 - 2 54 45 - 3 50 28 - 2 26 23 71 0 0 - 2 38 26 17 47 2 2 64 -69 - 2 52 13 - 2 24 39 - 3 20 32 - 1 56 11 72 0 0 - 2 7 56 17 47 4 3 64 -70 - 2 21 45 - 1 54 6 - 2 50 9 - 1 25 33 73 0 0 - 1 36 59 17 47 5 5 64 -71 - 1 50 50 - 1 23 6 - 2 19 20 - 0 54 28 74 0 0 - 1 5 35 17 47 7 6 64 -72 - 1 19 29 - 0 51 41 - 1 48 4 - 0 22 58 75 0 0 - 0 33 47 17 47 10 7 64 -73 - 0 47 43 - 0 19 49 - 1 16 23 0 8 59 76 0 0 - 0 1 33 17 47 13 8 64 -74 - 0 15 32 0 12 27 - 0 44 17 0 41 20 77 0 0 0 31 5 17 47 16 9 64 -75 0 17 4 0 45 7 - 0 11 46 1 14 5 78 0 0 1 4 6 17 47 20 10 64 -77 0 50 3 1 18 11 0 21 8 1 47 14 79 0 0 1 37 31 17 47 25 11 64 -78 1 23 25 1 51 38 0 54 26 2 20 45 80 0 0 2 11 17 17 47 30 13 64 -79 1 57 9 2 25 27 1 28 5 2 54 39 81 0 0 2 45 25 17 47 35 14 64 -80 2 31 15 2 59 37 2 2 7 3 28 54 82 0 0 3 19 54 17 47 41 15 64 -81 3 5 41 3 34 7 2 36 28 4 3 29 83 0 0 3 54 42 17 47 48 16 64 -82 3 40 27 4 8 57 3 11 10 4 38 23 84 0 0 4 29 48 17 47 55 17 64 -84 4 15 32 4 44 6 3 46 10 5 13 36 85 0 0 5 5 13 17 48 2 18 64 -85 4 50 54 5 19 32 4 21 29 5 49 6 86 0 0 5 40 53 17 48 10 20 64 -86 5 26 33 5 55 15 4 57 4 6 24 53 87 0 0 6 16 50 17 48 19 21 65 -87 6 2 28 6 31 13 5 32 55 7 0 55 88 0 0 6 53 1 17 48 28 22 65 -88 6 38 37 7 7 26 6 9 0 7 37 11 89 0 0 7 29 25 17 48 37 23 65 -89 7 14 59 7 43 51 6 45 19 8 13 40 90 0 0 8 6 1 17 48 47 24 65 -89 7 51 34 8 20 29 7 21 51 8 50 21 91 0 0 8 42 48 17 48 58 26 65 -88 8 28 19 8 57 17 7 58 34 9 27 12 92 0 0 9 19 44 17 49 8 27 66 -87 9 5 15 9 34 15 8 35 26 10 4 13 93 0 0 9 56 49 17 49 20 28 66 -86 9 42 18 10 11 21 9 12 28 10 41 21 94 0 0 10 34 1 17 49 32 29 66 -84 10 19 29 10 48 34 9 49 36 11 18 36 95 0 0 11 11 19 17 49 44 30 66 -83 10 56 46 11 25 53 10 26 51 11 55 57 96 0 0 11 48 40 17 49 57 32 67 -82 11 34 7 12 3 15 11 4 10 12 33 21 97 0 0 12 26 5 17 50 10 33 67 -81 12 11 31 12 40 41 11 41 32 13 10 48 98 0 0 13 3 31 17 50 24 34 67 -80 12 48 56 13 18 7 12 18 57 13 48 16 99 0 0 13 40 57 17 50 38 35 68 -78 13 26 22 13 55 34 12 56 21 14 25 43 100 0 0 14 18 22 17 50 52 36 68 -77 14 3 46 14 32 59 13 33 45 15 3 8 101 0 0 14 55 44 17 51 7 37 69 -76 14 41 8 15 10 21 14 11 6 15 40 31 102 0 0 15 33 1 17 51 22 39 69 -75 15 18 25 15 47 38 14 48 24 16 17 48 103 0 0 16 10 13 17 51 38 40 69 -74 15 55 37 16 24 50 15 25 36 16 54 59 104 0 0 16 47 17 17 51 54 41 70 -72 16 32 42 17 1 54 16 2 41 17 32 3 105 0 0 17 24 13 17 52 10 42 70 -71 17 9 38 17 38 50 16 39 39 18 8 58 106 0 0 18 1 0 17 52 27 43 71 -70 17 46 25 18 15 35 17 16 26 18 45 42 107 0 0 18 37 34 17 52 44 44 72 -69 18 23 0 18 52 9 17 53 3 19 22 15 108 0 0 19 13 56 17 53 1 46 72 -68 18 59 23 19 28 30 18 29 28 19 58 34 109 0 0 19 50 4 17 53 19 47 73 -66 19 35 32 20 4 37 19 5 38 20 34 39 110 0 0 20 25 57 17 53 37 48 73 -65 20 11 26 20 40 29 19 41 34 21 10 28 111 0 0 21 1 33 17 53 55 49 74 -64 20 47 3 21 16 3 20 17 14 21 46 0 112 0 0 21 36 51 17 54 13 50 75 -63 21 22 22 21 51 20 20 52 36 22 21 14 113 0 0 22 11 50 17 54 31 51 76 -62 21 57 23 22 26 18 21 27 40 22 56 9 114 0 0 22 46 29 17 54 50 52 76 -61 22 32 4 23 0 55 22 2 24 23 30 43 115 0 0 23 20 47 17 55 9 53 77 -59 23 6 23 23 35 11 22 36 47 24 4 55 116 0 0 23 54 42 17 55 28 55 78 -58 23 40 20 24 9 4 23 10 48 24 38 44 117 0 0 24 28 14 17 55 47 56 79 -57 24 13 54 24 42 35 23 44 26 25 12 10 118 0 0 25 1 22 17 56 7 57 80 -56 24 47 4 25 15 40 24 17 40 25 45 12 119 0 0 25 34 4 17 56 26 58 81 -55 25 19 49 25 48 21 24 50 29 26 17 48 120 0 0 26 6 21 17 56 46 59 82 -54 25 52 7 26 20 35 25 22 52 26 49 57 121 0 0 26 38 10 17 57 5 60 83 -53 26 23 59 26 52 22 25 54 49 27 21 40 122 0 0 27 9 32 17 57 25 61 85 -52 26 55 24 27 23 42 26 26 18 27 52 54 123 0 0 27 40 26 17 57 45 62 86 -51 27 26 20 27 54 33 26 57 20 28 23 40 124 0 0 28 10 51 17 58 5 63 87 -49 27 56 47 28 24 55 27 27 52 28 53 57 125 0 0 28 40 46 17 58 24 64 89 -48 28 26 45 28 54 48 27 57 56 29 23 45 126 0 0 29 10 12 17 58 44 65 90 -47 28 56 13 29 24 11 28 27 29 29 53 2 127 0 0 29 39 6 17 59 4 66 92 -46 29 25 11 29 53 3 28 56 32 30 21 48 128 0 0 30 7 30 17 59 24 67 94 -45 29 53 38 30 21 24 29 25 4 30 50 3 129 0 0 30 35 23 17 59 44 67 95 -44 30 21 33 30 49 14 29 53 5 31 17 47 130 0 0 31 2 44 18 0 4 68 97 -43 30 48 56 31 16 31 30 20 35 31 44 59 131 0 0 31 29 32 18 0 23 69 99 -42 31 15 48 31 43 17 30 47 32 32 11 39 132 0 0 31 55 49 18 0 43 70 102 -41 31 42 7 32 9 31 31 13 58 32 37 47 133 0 0 32 21 33 18 1 3 71 104 -40 32 7 54 32 35 12 31 39 50 33 3 22 134 0 0 32 46 44 18 1 23 72 106 -39 32 33 9 33 0 21 32 5 11 33 28 25 135 0 0 33 11 23 18 1 42 72 109 -38 32 57 50 33 24 56 32 29 58 33 52 54 136 0 0 33 35 28 18 2 2 73 112 -37 33 21 59 33 48 59 32 54 13 34 16 51 137 0 0 33 59 1 18 2 21 74 115 -36 33 45 34 34 12 29 33 17 54 34 40 15 138 0 0 34 22 1 18 2 40 74 118 -35 34 8 37 34 35 25 33 41 2 35 3 5 139 0 0 34 44 27 18 3 0 75 121 -34 34 31 6 34 57 49 34 3 38 35 25 23 140 0 0 35 6 21 18 3 19 75 125 -33 34 53 2 35 19 40 34 25 40 35 47 8 141 0 0 35 27 41 18 3 38 76 129 -32 35 14 26 35 40 57 34 47 9 36 8 19 142 0 0 35 48 29 18 3 57 76 133 -31 35 35 16 36 1 42 35 8 5 36 28 58 143 0 0 36 8 43 18 4 16 77 137 -30 35 55 33 36 21 54 35 28 28 36 49 4 144 0 0 36 28 25 18 4 34 77 142 -30 36 15 18 36 41 33 35 48 18 37 8 38 145 0 0 36 47 34 18 4 53 77 146 -29 36 34 30 37 0 39 36 7 36 37 27 39 146 0 0 37 6 11 18 5 11 77 151 -28 36 53 9 37 19 13 36 26 20 37 46 7 147 0 0 37 24 15 18 5 30 77 156 -27 37 11 16 37 37 15 36 44 32 38 4 3 148 0 0 37 41 47 18 5 48 77 161 -26 37 28 50 37 54 44 37 2 12 38 21 27 149 0 0 37 58 47 18 6 6 77 165 -25 37 45 52 38 11 41 37 19 20 38 38 20 150 0 0 38 15 15 18 6 24 77 170 -24 38 2 23 38 28 7 37 35 55 38 54 40 151 0 0 38 31 11 18 6 42 77 175 -23 38 18 21 38 44 1 37 51 58 39 10 29 152 0 0 38 46 35 18 7 0 77 179 -22 38 33 48 38 59 23 38 7 30 39 25 46 153 0 0 39 1 29 18 7 17 77 184 -22 38 48 44 39 14 14 38 22 30 39 40 32 154 0 0 39 15 51 18 7 35 76 188 -21 39 3 8 39 28 34 38 36 59 39 54 48 155 0 0 39 29 42 18 7 52 76 192 -20 39 17 2 39 42 23 38 50 57 40 8 32 156 0 0 39 43 2 18 8 9 76 195 -19 39 30 24 39 55 41 39 4 24 40 21 46 157 0 0 39 55 52 18 8 26 75 199 -18 39 43 16 40 8 29 39 17 20 40 34 30 158 0 0 40 8 12 18 8 43 75 202 -17 39 55 37 40 20 47 39 29 45 40 46 43 159 0 0 40 20 1 18 9 0 74 205 -16 40 7 29 40 32 34 39 41 40 40 58 27 160 0 0 40 31 20 18 9 16 74 208 -16 40 18 50 40 43 52 39 53 5 41 9 41 161 0 0 40 42 10 18 9 33 73 211 -15 40 29 41 40 54 39 40 4 0 41 20 25 162 0 0 40 52 30 18 9 49 73 214 -14 40 40 3 41 4 58 40 14 26 41 30 40 163 0 0 41 2 21 18 10 5 72 216 -13 40 49 55 41 14 47 40 24 21 41 40 26 164 0 0 41 11 43 18 10 22 71 219 -12 40 59 18 41 24 7 40 33 47 41 49 43 165 0 0 41 20 35 18 10 38 71 221 -12 41 8 13 41 32 58 40 42 44 41 58 31 166 0 0 41 28 59 18 10 53 70 223 -11 41 16 38 41 41 21 40 51 12 42 6 51 167 0 0 41 36 54 18 11 9 69 225 -10 41 24 34 41 49 15 40 59 12 42 14 42 168 0 0 41 44 21 18 11 25 69 227 -9 41 32 2 41 56 40 41 6 42 42 22 5 169 0 0 41 51 19 18 11 40 68 229 -8 41 39 2 42 3 37 41 13 44 42 29 0 170 0 0 41 57 49 18 11 56 67 231 -8 41 45 33 42 10 6 41 20 17 42 35 27 171 0 0 42 3 52 18 12 11 67 232 -7 41 51 36 42 16 8 41 26 23 42 41 26 172 0 0 42 9 26 18 12 26 66 234 -6 41 57 12 42 21 41 41 32 0 42 46 57 173 0 0 42 14 33 18 12 41 65 236 -5 42 2 19 42 26 47 41 37 9 42 52 2 174 0 0 42 19 12 18 12 56 65 237 -4 42 6 59 42 31 25 41 41 51 42 56 38 175 0 0 42 23 24 18 13 10 64 239 -4 42 11 11 42 35 36 41 46 4 43 0 48 176 0 0 42 27 8 18 13 25 63 240 -3 42 14 56 42 39 20 41 49 50 43 4 30 177 0 0 42 30 25 18 13 39 63 241 -2 42 18 14 42 42 37 41 53 9 43 7 46 178 0 0 42 33 15 18 13 54 62 243 -1 42 21 4 42 45 26 41 56 0 43 10 34 179 0 0 42 35 37 18 14 8 61 244 -1 42 23 27 42 47 48 41 58 24 43 12 56 Uncertainty in time = +/- 10 secs [Prediction of 2008 Oct 1.0] Data for the target star ------------------------ * name: UCAC2 40818208 * constellation : Taurus * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 05 38 00.0249 DE: +25 54 08.553 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .029, .029 ) * V mag [mag]: 11.9 * B mag [mag]: 0.0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (73) Klytia approx. diameter [km]: 44 approx. diameter ["]: .031 distance from Earth [AU]: 1.98400 * orbital information: orbit source: Preston date of fit: 2008 Sep 30 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 983 number of rejected observations: 133 time covered by the observations: 1916 Sep 20 - 2008 Sep 26 1 sigma uncertainty ellipse (major, minor, PA): 0.024, 0.013, 88° remarks: * orbital elements for (73) Klytia : Mean anomaly = 1.38593146 deg Arg. of pericenter = 55.37050626 deg Long. of node = 7.18740215 deg Inclination = 2.37280439 deg Eccentricity = 0.04219101 Semimajor axis = 2.66468270 AU Perihelion dist = 2.55225706 AU Mag: H = 8.84, G = 0.15 Epoch of elements : MJD 54750.75400000 TDT (2008 Oct 11.754) ------ occelmnt file for Occult BEGIN ----------------------------------- 2008 Oct 11 73 Klytia 18h 5.9m UT 11.9 5 38 0.025 25 54 8.55UCAC2 40818208 0.0 13.6 44 8.1 1.984 0.980 3.86 152.3337 25.902 -94.82 -7.36 18.0978 -0.05861 0.20292 2.98791 0.87001 -0.00517 -0.00030 2000 1.21508420081011.00000 55.370506 7.187402 2.3728040.04219101 2.6646827 2.5522570 9.0 5.00.15 RATE 2.2658740 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.038 0.032 89 2.03 0.032 0 54740.5020081011_818208 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2008 Oct 01, 04:35 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org