IOTA/IOTA-ES occultation update for (1346) Gotha / TYC 5815-01070-1 event on 2012 Oct 03, 13:12 UT Visible from W Australia Summary ------- On 2012 Oct 03 UT, the 15 km diameter asteroid (1346) Gotha will occult a 10.2 mag star in the constellation Aquarius for observers along a path across W Australia. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.5 mag to 14.7 mag (the magnitude of the asteroid) for at most 1.9 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: 24 * date and approx. time of event: 2012 Oct 03, 12:59 - 2012 Oct 03, 13:24 UT * geocentric midpoint of event [JD]: 2456204.05039167 * magnitude of target star: 10.2 * magnitude drop [mag]: 4.5 * estimated maximum duration [s]: 1.9 * Moon: 90 % sunlit, 70° distance * Sun: 147° distance * rough path description: W Australia The occultation path -------------------- * approximate projected width [km]: 15 * 1 sigma uncertainty interval [path widths]: +/- 2.85 * 1 sigma uncertainty interval [seconds]: +/- 5.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- .043 +/- .034) * 1 sigma uncertainty ellipse (major, minor, PA): ( .044", .033", 86° ) * approx speed of asteroid's shadow [km/s]: 7.8731 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5815-01070-1 by 1346 Gotha on 2012 Oct 3 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 -154 35 58 57 0 0 12 59 7 1 250 -27 -154 57 12 -154 14 26 -156 53 17 ... .. .. -159 3 18 56 0 0 12 59 8 3 246 -30 -159 21 5 -158 45 21 -160 59 32 -156 59 35 Latitude Latitude Latitude Latitude -161 0 0 55 29 50 12 59 9 5 244 -31 55 34 19 55 25 22 55 59 53 54 59 49 -162 0 0 55 13 20 12 59 10 5 244 -32 55 17 51 55 8 50 55 43 35 54 43 7 -163 0 0 54 56 9 12 59 11 6 243 -32 55 0 41 54 51 36 55 26 35 54 25 43 -164 0 0 54 38 14 12 59 12 6 242 -33 54 42 48 54 33 39 55 8 53 54 7 35 -165 0 0 54 19 35 12 59 13 7 241 -33 54 24 12 54 14 59 54 50 28 53 48 43 -166 0 0 54 0 11 12 59 14 8 240 -34 54 4 50 53 55 33 54 31 18 53 29 6 -167 0 0 53 40 1 12 59 15 8 240 -35 53 44 42 53 35 20 54 11 22 53 8 41 -168 0 0 53 19 3 12 59 17 9 239 -35 53 23 46 53 14 21 53 50 39 52 47 29 -169 0 0 52 57 17 12 59 18 10 238 -36 53 2 2 52 52 32 53 29 8 52 25 27 -170 0 0 52 34 40 12 59 20 11 237 -37 52 39 28 52 29 53 53 6 46 52 2 35 -171 0 0 52 11 12 12 59 22 11 236 -37 52 16 2 52 6 22 52 43 34 51 38 51 -172 0 0 51 46 51 12 59 24 12 236 -38 51 51 43 51 41 59 52 19 30 51 14 13 -173 0 0 51 21 35 12 59 27 13 235 -39 51 26 30 51 16 41 51 54 31 50 48 41 -174 0 0 50 55 24 12 59 29 14 234 -39 51 0 21 50 50 27 51 28 37 50 22 12 -175 0 0 50 28 15 12 59 32 14 233 -40 50 33 15 50 23 15 51 1 46 49 54 46 -176 0 0 50 0 7 12 59 34 15 233 -41 50 5 10 49 55 4 50 33 56 49 26 20 -177 0 0 49 30 58 12 59 37 16 232 -42 49 36 4 49 25 53 50 5 6 48 56 52 -178 0 0 49 0 48 12 59 41 17 231 -42 49 5 56 48 55 39 49 35 14 48 26 22 -179 0 0 48 29 33 12 59 44 18 230 -43 48 34 44 48 24 21 49 4 19 47 54 48 -180 0 0 47 57 12 12 59 48 18 230 -44 48 2 26 47 51 58 48 32 18 47 22 7 179 0 0 47 23 44 12 59 52 19 229 -45 47 29 1 47 18 26 47 59 10 46 48 19 178 0 0 46 49 6 12 59 56 20 228 -45 46 54 27 46 43 46 47 24 53 46 13 21 177 0 0 46 13 18 13 0 0 21 227 -46 46 18 41 46 7 54 46 49 26 45 37 12 176 0 0 45 36 16 13 0 5 22 227 -47 45 41 43 45 30 50 46 12 46 44 59 49 175 0 0 44 58 0 13 0 10 23 226 -48 45 3 30 44 52 31 45 34 52 44 21 12 174 0 0 44 18 28 13 0 16 24 225 -49 44 24 1 44 12 55 44 55 41 43 41 17 173 0 0 43 37 38 13 0 21 25 225 -50 43 43 14 43 32 1 44 15 13 43 0 5 172 0 0 42 55 28 13 0 27 26 224 -50 43 1 7 42 49 48 43 33 26 42 17 32 171 0 0 42 11 56 13 0 34 27 223 -51 42 17 39 42 6 13 42 50 17 41 33 38 170 0 0 41 27 1 13 0 40 28 223 -52 41 32 48 41 21 15 42 5 45 40 48 21 169 0 0 40 40 42 13 0 48 29 222 -53 40 46 32 40 34 52 41 19 48 40 1 39 168 0 0 39 52 56 13 0 55 30 221 -54 39 58 50 39 47 3 40 32 25 39 13 30 167 0 0 39 3 43 13 1 3 31 221 -55 39 9 40 38 57 47 39 43 36 38 23 55 166 0 0 38 13 2 13 1 12 32 220 -56 38 19 2 38 7 2 38 53 17 37 32 50 165 0 0 37 20 50 13 1 20 33 219 -57 37 26 54 37 14 47 38 1 29 36 40 16 164 0 0 36 27 9 13 1 30 35 219 -58 36 33 16 36 21 2 37 8 9 35 46 12 163 0 0 35 31 55 13 1 40 36 218 -59 35 38 6 35 25 45 36 13 19 34 50 36 162 0 0 34 35 10 13 1 50 37 218 -60 34 41 24 34 28 57 35 16 56 33 53 29 161 0 0 33 36 53 13 2 1 38 217 -61 33 43 10 33 30 36 34 19 0 32 54 50 160 0 0 32 37 3 13 2 12 40 217 -62 32 43 23 32 30 43 33 19 32 31 54 38 159 0 0 31 35 41 13 2 24 41 216 -63 31 42 5 31 29 18 32 18 31 30 52 56 158 0 0 30 32 48 13 2 36 42 215 -64 30 39 14 30 26 22 31 15 59 29 49 42 157 0 0 29 28 24 13 2 49 44 215 -64 29 34 53 29 21 55 30 11 55 28 44 58 156 0 0 28 22 30 13 3 3 45 214 -65 28 29 2 28 15 58 29 6 20 27 38 45 155 0 0 27 15 8 13 3 17 46 214 -66 27 21 43 27 8 33 27 59 16 26 31 5 154 0 0 26 6 19 13 3 31 48 213 -67 26 12 57 25 59 42 26 50 46 25 21 58 153 0 0 24 56 7 13 3 47 49 213 -68 25 2 47 24 49 27 25 40 50 24 11 29 152 0 0 23 44 32 13 4 2 51 212 -69 23 51 14 23 37 49 24 29 31 22 59 38 151 0 0 22 31 38 13 4 19 52 212 -69 22 38 22 22 24 53 23 16 52 21 46 29 150 0 0 21 17 28 13 4 36 54 212 -70 21 24 15 21 10 41 22 2 56 20 32 5 149 0 0 20 2 6 13 4 53 55 211 -70 20 8 55 19 55 17 20 47 47 19 16 31 148 0 0 18 45 36 13 5 11 57 211 -71 18 52 26 18 38 45 19 31 28 17 59 48 147 0 0 17 28 1 13 5 30 58 210 -71 17 34 53 17 21 9 18 14 4 16 42 3 146 0 0 16 9 27 13 5 49 60 210 -71 16 16 21 16 2 34 16 55 40 15 23 20 145 0 0 14 49 59 13 6 8 61 209 -71 14 56 53 14 43 4 15 36 19 14 3 43 144 0 0 13 29 41 13 6 28 63 209 -71 13 36 36 13 22 45 14 16 8 12 43 18 143 0 0 12 8 38 13 6 49 65 208 -71 12 15 35 12 1 42 12 55 11 11 22 10 142 0 0 10 46 58 13 7 10 66 208 -71 10 53 55 10 40 1 11 33 35 10 0 25 141 0 0 9 24 44 13 7 31 68 207 -70 9 31 42 9 17 47 10 11 25 8 38 9 140 0 0 8 2 4 13 7 53 70 207 -70 8 9 2 7 55 7 8 48 47 7 15 27 139 0 0 6 39 4 13 8 14 71 206 -69 6 46 2 6 32 6 7 25 47 5 52 25 138 0 0 5 15 49 13 8 37 73 205 -68 5 22 47 5 8 51 6 2 31 4 29 11 137 0 0 3 52 26 13 8 59 74 204 -67 3 59 23 3 45 28 4 39 6 3 5 50 136 0 0 2 29 1 13 9 22 76 203 -66 2 35 58 2 22 4 3 15 38 1 42 28 135 0 0 1 5 40 13 9 44 78 202 -65 1 12 36 0 58 43 1 52 12 0 19 11 134 0 0 - 0 17 31 13 10 7 79 200 -64 - 0 10 35 - 0 24 26 0 28 56 - 1 3 54 133 0 0 - 1 40 25 13 10 30 81 198 -63 - 1 33 30 - 1 47 19 - 0 54 4 - 2 26 42 132 0 0 - 3 2 56 13 10 53 82 195 -62 - 2 56 3 - 3 9 50 - 2 16 44 - 3 49 6 131 0 0 - 4 25 0 13 11 16 84 190 -60 - 4 18 7 - 4 31 52 - 3 38 56 - 5 11 1 130 0 0 - 5 46 29 13 11 39 85 182 -59 - 5 39 39 - 5 53 20 - 5 0 36 - 6 32 21 129 0 0 - 7 7 20 13 12 2 87 167 -58 - 7 0 31 - 7 14 9 - 6 21 37 - 7 53 1 128 0 0 - 8 27 27 13 12 24 87 140 -56 - 8 20 39 - 8 34 14 - 7 41 56 - 9 12 56 127 0 0 - 9 46 44 13 12 47 87 104 -55 - 9 39 58 - 9 53 29 - 9 1 26 -10 32 0 126 0 0 -11 5 8 13 13 9 86 79 -54 -10 58 24 -11 11 51 -10 20 3 -11 50 11 125 0 0 -12 22 33 13 13 31 85 66 -53 -12 15 52 -12 29 15 -11 37 43 -13 7 22 124 0 0 -13 38 57 13 13 53 84 59 -51 -13 32 18 -13 45 36 -12 54 22 -14 23 31 123 0 0 -14 54 15 13 14 14 82 54 -50 -14 47 38 -15 0 52 -14 9 56 -15 38 33 122 0 0 -16 8 24 13 14 35 81 52 -49 -16 1 50 -16 14 58 -15 24 21 -16 52 25 121 0 0 -17 21 21 13 14 56 79 50 -47 -17 14 49 -17 27 52 -16 37 35 -18 5 5 120 0 0 -18 33 2 13 15 17 78 48 -46 -18 26 33 -18 39 32 -17 49 35 -19 16 29 119 0 0 -19 43 27 13 15 37 77 47 -45 -19 37 0 -19 49 53 -19 0 18 -20 26 35 118 0 0 -20 52 32 13 15 56 75 47 -43 -20 46 8 -20 58 55 -20 9 41 -21 35 21 117 0 0 -22 0 15 13 16 16 74 46 -42 -21 53 54 -22 6 36 -21 17 44 -22 42 45 116 0 0 -23 6 35 13 16 34 72 46 -41 -23 0 18 -23 12 53 -22 24 24 -23 48 46 115 0 0 -24 11 32 13 16 53 71 46 -39 -24 5 17 -24 17 46 -23 29 40 -24 53 23 114 0 0 -25 15 3 13 17 11 70 46 -38 -25 8 51 -25 21 14 -24 33 32 -25 56 33 113 0 0 -26 17 8 13 17 28 68 46 -37 -26 10 59 -26 23 16 -25 35 57 -26 58 18 112 0 0 -27 17 46 13 17 45 67 46 -36 -27 11 41 -27 23 52 -26 36 57 -27 58 36 111 0 0 -28 16 58 13 18 2 66 46 -35 -28 10 56 -28 23 1 -27 36 30 -28 57 27 110 0 0 -29 14 44 13 18 18 65 46 -33 -29 8 44 -29 20 43 -28 34 36 -29 54 51 109 0 0 -30 11 2 13 18 34 63 46 -32 -30 5 6 -30 16 59 -29 31 16 -30 50 49 108 0 0 -31 5 55 13 18 49 62 46 -31 -31 0 2 -31 11 48 -30 26 30 -31 45 20 107 0 0 -31 59 22 13 19 4 61 47 -30 -31 53 32 -32 5 12 -31 20 17 -32 38 26 106 0 0 -32 51 23 13 19 19 60 47 -29 -32 45 37 -32 57 10 -32 12 40 -33 30 6 105 0 0 -33 42 1 13 19 33 59 48 -28 -33 36 17 -33 47 44 -33 3 39 -34 20 23 104 0 0 -34 31 15 13 19 46 58 48 -27 -34 25 34 -34 36 55 -33 53 14 -35 9 16 103 0 0 -35 19 7 13 19 59 56 48 -26 -35 13 29 -35 24 44 -34 41 26 -35 56 47 102 0 0 -36 5 37 13 20 12 55 49 -25 -36 0 3 -36 11 11 -35 28 17 -36 42 57 101 0 0 -36 50 48 13 20 24 54 49 -24 -36 45 16 -36 56 19 -36 13 49 -37 27 47 100 0 0 -37 34 39 13 20 36 53 50 -23 -37 29 11 -37 40 8 -36 58 1 -38 11 18 99 0 0 -38 17 14 13 20 48 52 50 -22 -38 11 49 -38 22 39 -37 40 55 -38 53 33 98 0 0 -38 58 32 13 20 59 51 51 -21 -38 53 10 -39 3 55 -38 22 33 -39 34 31 97 0 0 -39 38 36 13 21 10 50 51 -20 -39 33 17 -39 43 56 -39 2 57 -40 14 16 96 0 0 -40 17 27 13 21 21 49 52 -19 -40 12 11 -40 22 43 -39 42 7 -40 52 47 95 0 0 -40 55 6 13 21 31 48 52 -18 -40 49 52 -41 0 20 -40 20 5 -41 30 7 94 0 0 -41 31 35 13 21 41 47 53 -17 -41 26 24 -41 36 46 -40 56 52 -42 6 18 93 0 0 -42 6 55 13 21 50 46 54 -16 -42 1 47 -42 12 3 -41 32 31 -42 41 20 92 0 0 -42 41 8 13 22 0 45 54 -15 -42 36 3 -42 46 14 -42 7 2 -43 15 15 91 0 0 -43 14 16 13 22 9 45 55 -14 -43 9 13 -43 19 19 -42 40 27 -43 48 5 90 0 0 -43 46 19 13 22 17 44 55 -14 -43 41 19 -43 51 19 -43 12 47 -44 19 51 89 0 0 -44 17 20 13 22 26 43 56 -13 -44 12 22 -44 22 17 -43 44 5 -44 50 34 88 0 0 -44 47 19 13 22 34 42 57 -12 -44 42 24 -44 52 14 -44 14 20 -45 20 17 87 0 0 -45 16 18 13 22 42 41 57 -11 -45 11 25 -45 21 11 -44 43 36 -45 49 0 86 0 0 -45 44 19 13 22 49 40 58 -10 -45 39 29 -45 49 10 -45 11 52 -46 16 46 85 0 0 -46 11 23 13 22 57 39 59 -10 -46 6 35 -46 16 11 -45 39 12 -46 43 34 84 0 0 -46 37 31 13 23 4 39 59 -9 -46 32 45 -46 42 17 -46 5 35 -47 9 27 83 0 0 -47 2 45 13 23 11 38 60 -8 -46 58 1 -47 7 29 -46 31 3 -47 34 26 82 0 0 -47 27 5 13 23 17 37 61 -7 -47 22 23 -47 31 47 -46 55 37 -47 58 33 81 0 0 -47 50 34 13 23 24 36 61 -7 -47 45 54 -47 55 13 -47 19 20 -48 21 47 80 0 0 -48 13 12 13 23 30 36 62 -6 -48 8 34 -48 17 49 -47 42 11 -48 44 12 79 0 0 -48 35 0 13 23 36 35 63 -5 -48 30 24 -48 39 36 -48 4 12 -49 5 47 78 0 0 -48 56 0 13 23 42 34 64 -4 -48 51 26 -49 0 34 -48 25 25 -49 26 35 77 0 0 -49 16 13 13 23 48 33 64 -4 -49 11 40 -49 20 45 -48 45 50 -49 46 35 76 0 0 -49 35 39 13 23 53 33 65 -3 -49 31 9 -49 40 9 -49 5 28 -50 5 50 75 0 0 -49 54 20 13 23 58 32 66 -2 -49 49 52 -49 58 49 -49 24 20 -50 24 20 74 0 0 -50 12 17 13 24 4 31 67 -2 -50 7 50 -50 16 44 -49 42 28 -50 42 5 73 0 0 -50 29 31 13 24 9 31 67 -1 -50 25 6 -50 33 56 -49 59 53 -50 59 9 72 0 0 -50 46 2 13 24 13 30 68 0 -50 41 38 -50 50 26 -50 16 34 -51 15 30 Uncertainty in time = +/- 6 secs Prediction of 2012 Sep 27.0 Data for the target star ------------------------ * name: TYC 5815-01070-1 * constellation : Aquarius * J2000 position with proper motion to date of event [h,m,s ; °,',"] RA: 22 41 00.2191 DE: -10 25 24.591 * position source: mpos:UCAC2 pm:UCAC2 * standard error: RA,DE ["]: ( .023, .023 ) * V mag [mag]: 10.2 * B mag [mag]: 10.8 * Diameter [mas]: 0 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1346) Gotha approx. diameter [km]: 15 approx. diameter ["]: .014 distance from Earth [AU]: 1.46300 * orbital information: orbit source: Preston date of fit: 2012 Sep 26 source of used astrometry: FASTT MPC (via Astdys) number of used observations: 883 number of rejected observations: 20 time covered by the observations: 1929 Feb 05 - 2012 Sep 18 1 sigma uncertainty ellipse (major, minor, PA): 0.037, 0.024, 84° remarks: * orbital elements for (1346) Gotha : Mean anomaly = 312.13506683 deg Arg. of pericenter = 250.39245858 deg Long. of node = 166.18349231 deg Inclination = 13.84591956 deg Eccentricity = 0.17834032 Semimajor axis = 2.62683101 AU Perihelion dist = 2.15836112 AU Mag: H = 11.30, G = 0.15 Epoch of elements : MJD 56203.55000000 TDT (2012 Oct 03.550) ------ occelmnt file for Occult BEGIN ----------------------------------- 2012 Oct 3 1346 Gotha 13h 12.6m UT 10.2 22 41 0.219-10 25 24.59TYC 5815-01070-1 10.8 14.7 15 1.9 1.463 -1.009 -22.15 129.4649 -10.417 -20.92 -4.25 13.2094 -0.03564 0.02412 -2.47902 -3.68808 0.00270 0.00126 2000 311.3132332012 930.00000250.392459166.183492 13.8459200.17834032 2.6268310 2.158361111.3 5.00.15 RATE 2.3150260 0.000000 0.000000 0.000000 0.0000000 0.0000000 0.0000000 Meas 0.044 0.033 86 3.85 0.040 0 0 1-1 056197.0020121003_1070-1 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2012 Sep 26, 21:56 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 425-688-9965 mailto: stevepr@acm.org